M20 Pin Headers: Reliable Internal PCB Connectivity for Industrial Power & Control Equipment

Stable connections where reliability matters most

Air circuit breakers and motor protection relays rely on stable internal PCB connectivity to support reliable operation and long-term system performance. Component selection must support consistent electrical contact, withstand industrial operating conditions, and remain cost-effective for volume production.

This application highlights how Indess M20 pin headers (2.54 mm pitch) are used for internal PCB interconnections inside industrial power and control equipment, followed by an overview of the key features that support consistent and cost-effective PCB design.

Ideal for Internal PCB Applications

In air circuit breakers and motor protection relays, M20 pin headers are commonly used to create reliable board-to-board or board-to-wire connections inside enclosed systems. While not exposed to external environments, these components must still perform reliably under normal operating temperatures, vibration, and long service life expectations within enclosed systems.

Typical applications include:

• Air circuit breakers (ACB)
• Motor protection relays
• Industrial control units
• Power control and protection assemblies

By providing consistent contact and mechanical stability, M20 pin headers help ensure uninterrupted operation of critical industrial equipment.

 

Why Indess M20 Pin Headers?

Built for Consistent Performance and Manufacturing Efficiency

The Indess M20 pin header range is designed to meet the practical needs of industrial PCB design:

• Industry-standard 2.54 mm pitch
  Ensures compatibility with common PCB layouts and simplifies design integration
• Reliable internal PCB connectivity
  Provides stable electrical contact for power and control signal transmission
• Compact, straightforward design
  Suitable for space-efficient layouts inside protection and control modules
• Cost-effective for volume production
  Ideal for high-volume industrial manufacturing without compromising reliability

These features make Indess M20 pin headers a practical solution for engineers seeking dependable internal PCB connections, rather than external cable or circular connector solutions.

Ideal for Air Circuit Breakers & Motor Protection Relays

Within air circuit breakers and motor protection relays, internal PCB connections must support:

• Accurate signal transmission
• Reliable power distribution
• Long-term operational stability

Indess M20 pin headers are commonly selected to meet these requirements, supporting clean internal PCB layouts and repeatable assembly during manufacturing.

Download the Indess M20 Pin Header Datasheet

Access detailed technical specifications, mechanical drawings, pin configurations, and material information to support your design requirements.

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Summary

Indess M20 pin headers provide a simple, reliable, and cost-effective internal PCB connectivity solution for use inside industrial power and control equipment. Designed for use inside equipment such as air circuit breakers and motor protection relays, they support stable electrical performance and efficient manufacturing for long-term industrial reliability.

 

Sustainable Energy Solutions: Green Energy Monitoring & IoT Connectivity

As renewable energy systems continue to expand, reliable monitoring and connectivity are essential to ensure efficiency, stability, and long-term performance. From solar farms to smart energy infrastructure, IoT-enabled monitoring allows operators to collect real-time data, detect issues early, and optimise energy output.

At iConnexion, we support sustainable energy systems with proven connectivity and protection solutions designed for harsh outdoor and industrial environments.

Application

Our solutions are commonly used in:

• Solar power monitoring systems

• Wind energy installations

• Smart grid and energy management systems

• Remote environmental and energy monitoring

• IoT-enabled green infrastructure

Engineering Background

Green energy monitoring systems rely on multiple electronic components working together:

• Sensors collecting energy and environmental data

• Wireless modules transmitting data remotely

• Antennas ensuring stable signal performance

• Shielding solutions protecting sensitive circuits from EMI

These systems are often deployed outdoors, where interference, temperature variation, and long operating hours can affect performance.

The Challenge

Designers and system integrators face several challenges when building green energy monitoring solutions:

• Maintaining stable wireless communication in remote locations

• Protecting sensitive electronics from EMI and electrical noise

• Ensuring compact designs without compromising reliability

• Achieving long-term performance with minimal maintenance

iConnexion Solution

iConnexion Solution

We offer a complete ecosystem of connectivity and protection components for sustainable energy applications:

• Harwin- EZi Shielding
  Protect sensitive circuits from EMI to ensure stable and reliable system performance.

• Lierda NB-IoT Modules
  Enable stable, efficient wireless communication for remote monitoring and data transmission.

• Harwin Asia- MMi Antennas
  Compact and reliable antenna solutions designed for consistent IoT signal transmission.

Together, these solutions help create robust, scalable, and future-ready green energy monitoring systems.

Summary

Reliable connectivity and protection are critical to the success of modern green energy systems. With the right combination of shielding, wireless modules, and antennas, engineers can build monitoring solutions that are efficient, durable, and ready for the future of sustainable power.

 

Tiny Antenna, Big Signal: LTE Patch Antenna

Powerful LTE Performance, Built for Tight Spaces

Compact yet powerful — the Harwin LTE Patch Antenna delivers reliable LTE connectivity for space-constrained devices. Perfect for IoT, CCTV, EV telematics, and industrial modules, its embedded design ensures seamless integration without compromising signal strength.

Application

• IoT modules & sensors

• CCTV & security systems

• EV telematics & connected vehicles

• Industrial automation & embedded devices

Engineering Background

Modern compact devices demand antennas that provide strong LTE performance while fitting into tight layouts. Designers face the challenge of balancing space, connectivity, and reliability.

The Challenge

Devices with limited internal space often struggle to maintain consistent LTE signals, especially across multiple cellular bands and in industrial or connected environments.

Harwin Solution

Harwin Solution
The LTE Patch Antenna offers:

• Ultra-compact, low-profile surface-mount design

• Optimized LTE performance with peak gain up to 4.5 dBi

• Broad frequency coverage: 698–960 MHz

• Reliable connectivity across multiple cellular bands

• Easy PCB/module integration for space-constrained designs

Proven in IoT sensors, CCTV systems, and EV telematics devices, the LTE Patch Antenna consistently ensures strong signal reception even in tight or complex device layouts.

📩 Interested in technical drawings or specifications? Fill in the Product Interest Form and get all the details you need for your design.

👉 Request a Sample | Contact Sales

 

NB860 Series NB-IoT Module — Ultra-Low Power IoT Connectivity

Low Power. Full Connectivity. Compact Size

The NB860 Series IoT Module from Lierda is a cellular NB-IoT communication module built for ultra-low power consumption, wide-area connectivity, and seamless integration into IoT systems. It supports full-network NB-IoT standards based on 3GPP Release 13/14/15 with optional future upgrades, and is highly compatible with existing device platforms. The module’s rich peripheral interfaces and efficient development ecosystem make it ideal for fast deployment in commercial and industrial IoT applications.

Key Features

• 📶 Global NB-IoT Support: Conforms to full-network standards for wide area coverage and stable cellular communication.
• ⚡ Ultra-Low Power Consumption: Designed for battery-powered or long-lifecycle IoT devices with very low standby current.
• 🔌 Rich Interfaces: Includes built-in UART and other peripheral support to simplify device integration.
• 🧠 Seamless Integration: Compatible with major IoT platforms, easy AT command control for quick setup.
• 📦 Compact & High-Integration Design: Small form factor for embedded applications in constrained spaces.

Applications & Markets

The NB860 Series IoT Module is ideal for a wide range of IoT use cases across multiple industries, including:

• 📊 Smart Metering: Electricity, water, gas, heat metering systems needing reliable long-term connectivity.

• 🏭 Industrial Automation: Remote diagnostics and control of industrial sensors and actuators.

• 🚜 Smart Agriculture & Environmental Sensors: Field devices requiring wide coverage and low maintenance.

• 📍 Asset Tracking & Logistics: GPS-enabled IoT endpoints for logistics, fleets, and equipment monitoring.

• 🏘 Smart City Projects: IoT endpoints for lighting, parking, waste management and environmental monitoring.

Evaluate the NB860 Series NB-IoT Module for your next IoT design.
Submit your request and our technical team will contact you.

 Request a Sample | Contact Sales

Summary

The Lierda NB860 Series NB-IoT Module delivers robust, low-power cellular connectivity with rich interfaces and high compatibility for industrial and consumer IoT applications. Whether powering smart metering devices or industrial sensors, NB860 offers a cost-effective foundation for scalable IoT solutions. Ideal for developers and enterprises seeking fast time-to-market with minimized integration effort.

 

Optronic Mast System

Ultra-Compact, High-Reliability Connectivity for Defense & Naval Platforms

Modern optronic mast systems rely on multiple high-performance sensors to deliver clear situational awareness in all-light and all-weather conditions.
To support multi-spectral imaging within a fixed mast diameter, connector solutions must be compact, reliable, and proven for long-term defense programs.

Harwin’s Gecko-SL ultra-compact connectors are engineered to meet these challenges, enabling secure multi-signal connectivity without increasing system size.

Application

Gecko-SL connectors are ideal for space-critical defense electronics, including:

• Optronic mast systems

• Multi-spectral camera assemblies (Visible & SWIR)

• Compact electronic modules with high signal density

Engineering Background

Optronic mast systems integrate multiple sensors—such as 4K visible cameras and SWIR imaging modules—within a constrained mechanical envelope.
Because mast dimensions are fixed, designers must maximize signal density while maintaining reliability under harsh naval operating conditions.

This places strict demands on connector size, signal integrity, and long-term availability.

The Challenge

System designers require a connector solution that can:

• Support multiple signals in a limited PCB footprint

• Maintain reliable performance in harsh defense environments

• Resist vibration and mechanical stress

• Ensure long-term availability for extended defense programs

Harwin Solution

Gecko-SL Ultra-Compact Connector Range

Harwin’s Gecko-SL connectors deliver high-reliability performance in a compact form factor:

• Ultra-compact design for dense PCB layouts

• High-reliability performance for defense and naval systems

• Supports multiple signals within minimal space

• Secure mating for vibration-resistant applications

• Designed for long-term availability programs

Discover how Gecko-SL connectors deliver compact, reliable connectivity for demanding applications.

👉 Request a Sample | Download Datasheet | Contact Sales

 

Battery Management System (BMS): The Heart of Every EV

Powering Safe, Reliable, and Efficient Electric Mobility

In every electric vehicle (EV), the Battery Management System (BMS) plays a critical role in ensuring safety, performance, and longevity of the battery pack. Acting as the “brain” of the battery, the BMS continuously monitors, protects, and optimises battery operation under varying conditions.

As part of our E-Mobility Solutions, this week we focus on the Battery Management System block within the EV architecture, highlighting how key components come together to support reliable EV performance.

Application

Battery Management System (BMS) in Electric Vehicles

The BMS is responsible for:

• Monitoring cell voltage, current, and temperature

• Balancing battery cells for consistent performance

• Protecting against overcharge, over-discharge, and thermal runaway

• Supporting energy efficiency and battery lifespan

This makes the BMS a mission-critical subsystem in EV platforms, from passenger vehicles to commercial and industrial electric mobility solutions.

Engineering Background

BMS environments demand components that can withstand:

• High current and power density

• Thermal stress and temperature fluctuations

• Vibration and mechanical shock

• Long operational lifecycles with minimal maintenance

Component selection within the BMS directly impacts system reliability, safety compliance, and overall vehicle performance.

The Challenge

Designing a robust BMS requires addressing several engineering challenges:

• Ensuring stable, low-resistance electrical connections

• Managing heat in compact, high-power designs

• Maintaining signal integrity in harsh operating environments

• Achieving long-term reliability under continuous cycling

iConnexion Solution

Through our technology partners, we support BMS design with proven, automotive-ready solutions:

🔹 Harwin Asia– Press-Fit Terminals (MMi)
Provide reliable, vibration-resistant electrical connections without soldering, ideal for high-reliability BMS assemblies.

🔹 CAP-XX – Cylindrical Supercapacitors
Deliver high power density and stability, supporting peak power demands and energy buffering within the BMS.

🔹 SGC Circuits – Heavy Copper / Rigid-Flex PCBs
Enable excellent thermal performance and mechanical reliability, even in harsh EV operating environments.

Together, these solutions help engineers build safer, more efficient, and more durable Battery Management Systems.

Summary

The Battery Management System is truly the heart of every EV — protecting the battery, maximising performance, and ensuring long-term reliability. By combining high-quality interconnects, advanced energy storage components, and robust PCB technologies, iConnexion supports EV designers in developing next-generation BMS solutions.

 

Electric Vehicle Power Module

High-reliability socket solutions for thermally demanding EV applications

Electric vehicle (EV) power modules require interconnect solutions that can operate reliably under high temperatures while maintaining compact PCB layouts and consistent electrical performance. Harwin’s IMS-compatible socket solutions are engineered to meet these challenges, making them suitable for modern EV and automotive electronic systems.

Application

Harwin IMS socket solutions are commonly used in:

• Electric vehicle power modules

• IMS (Insulated Metal Substrate) PCBs

• Automotive control systems

• Automotive and street lighting applications

Engineering Background

IMS PCBs feature a copper circuit layer bonded to a thermally conductive dielectric and a metal baseplate (aluminium or copper). As the layers are electrically isolated and do not use plated through-holes, conventional through-board sockets are unsuitable for these applications.

The Challenge

EV designers require a connector solution that:

• Supports effective thermal management

• Sits above the PCB using a stand-off design

• Allows surface-mount termination

• Ensures accurate multi-pin alignment

• Supports Design for Manufacture (DFM) in high-volume production

Harwin Solution

IMS-Compatible Stand-off Socket Solutions

Designed to deliver reliable performance in demanding EV environments, offering:

• Stand-off configuration above the PCB

• Surface-mount termination

• Accurate and repeatable multi-pin alignment

• DFM-friendly assembly

• Reliable operation in high-temperature applications

Explore how Harwin EZi IMS sockets support EV power module designs.

👉 Request a Sample | Download Datasheet| Contact Sales

 

Archer Kontrol in Robotic Arm Systems

Fine-pitch, secure connections designed for compact and precise robotic applications.

Collaborative robotic systems (cobots) demand interconnect solutions that are compact, reliable and optimized for high-precision motion control. Harwin’s Archer Kontrol 1mm pitch connectors provide the ideal balance of space savings, signal integrity and ease of assembly — making them a strong fit for modern industrial robotic arms.

Application

Archer Kontrol connectors are widely used in:

• Collaborative robotic arms

• Industrial automation platforms

• Compact PCB modules

• Low-current data transmission systems

Engineering Background

Robotic platforms often require:

• Fine-pitch connectors to maximize PCB space

• Low-current data signal stability

• Error-proof mating orientation for fast production

• Cost-efficient assembly in high-volume builds

The Challenge

To reduce footprint without compromising performance, robotics designers need connectors that:

• Support compact board layouts

• Provide consistent data signal integrity

• Enable fast, error-free assembly

• Include built-in shrouding and polarization

Harwin Solution

Archer Kontrol 1.00mm Pitch Board-to-Cable Connectors

Engineered for automation and robotics, offering:

• Polarized, shrouded housing

• One-direction, foolproof mating

• Space-efficient footprint

• Reliable data signal transfer

• Simple and fast installation on production lines

Download our technical brief for Archer Kontrol to explore PCB layout guidance, recommended mating cycles, and application best practices.

👉 Request a Sample | Download Product Training Module | Contact Sales

 

Long-range Noise Monitoring Built to Last

Milesight WS302 LoRaWAN® Sound Level Sensor

The Milesight WS302 LoRaWAN® Sound Level Sensor is a long-range noise monitoring solution designed for reliable, continuous sound measurement in indoor environments. Built for durability and accuracy, WS302 helps organizations monitor noise levels, ensure compliance, and improve environmental comfort with minimal maintenance.

Key Features

• Accurate Sound Measurement
  Measures sound levels from 30 to 120 dBA, suitable for a wide range of indoor applications.

• LoRaWAN® Long-Range Connectivity
  Enables stable, low-power data transmission over long distances, ideal for scalable IoT deployments.

• Easy NFC Configuration
  Quick setup and configuration via mobile app using NFC, reducing installation time.

• Instant Visual Alerts
  Built-in LED alarm indicator provides immediate on-site noise alerts.

• Compact & Modern Design
  Sleek, unobtrusive form factor designed to blend seamlessly into any indoor environment.

Applications & Markets

The WS302 is ideal for noise monitoring across multiple industries, including:

• Smart Buildings & Offices – Maintain comfortable acoustic environments

• Schools & Universities – Monitor classroom and common area noise levels

• Hospitals & Healthcare Facilities – Support patient comfort and compliance

• Hotels & Commercial Spaces – Improve guest experience and service quality

• Factories & Warehouses – Monitor operational noise for safety and compliance

Download the WS302 Datasheet
Get full technical specifications, installation details, and performance information.

 Request a Sample | Download Datasheet| Contact Sales

Harwin EZi Coin Cell Battery Holders for Secure PCB Power Solutions

High-retention coin cell battery holders engineered for reliable power connectivity in space-constrained PCBs

Harwin Coin Cell Battery Holders from the EZi Range are precision-engineered to deliver secure and reliable power connections for compact electronic assemblies. Designed to maintain consistent electrical contact, these holders support easy battery insertion and replacement while ensuring long-term performance in demanding environments. The EZi Range is ideal for PCB designs where space efficiency, reliability, and ease of assembly are critical.

Key Features

✔ High Retention Force
Ensures secure battery contact and stable electrical performance, even in vibration-prone or portable electronic applications.

✔ Ø12 mm & Ø20 mm Coin Cell Compatibility
Supports industry-standard coin cell sizes, offering flexibility across multiple PCB designs and power requirements.

✔ Compact, PCB-Optimised Design
Designed for space-constrained layouts, enabling efficient PCB routing and high component density.

✔ Easy Battery Replacement
User-friendly design allows quick battery insertion and removal, reducing maintenance time and improving serviceability.

✔ Reliable Mechanical Construction
Robust contact and housing design ensures consistent performance and long-term reliability.

✔ Assembly-Friendly Design
Suitable for both manual and automated PCB assembly processes, supporting efficient manufacturing workflows.

Applications & Markets

• Internet of Things (IoT) devices
• Robotics and automation systems
• UAVs and drone electronics
• Smart sensors and monitoring devices
• Consumer and portable electronic products

Product Range

The Harwin EZi Range Coin Cell Battery Holders are available in configurations supporting Ø12 mm and Ø20 mm coin cells, providing design flexibility across multiple electronic applications. The range is suitable for various PCB layouts and power requirements, making it a versatile choice for modern electronic designs

Need More Information?

📄 Technical datasheets & CAD models available
🧪 Evaluation samples upon request
💬 Talk to our sales team for product selection support

👉 Request a Sample | Download Product Training Module | Contact Sales

Summary

Harwin Coin Cell Battery Holders from the EZi Range provide secure battery retention, reliable electrical performance, and compact design flexibility. Engineered for modern electronics, they are a dependable solution for IoT, robotics, and other space-critical applications requiring stable coin cell power connectivity.