OCN OK-02M-04 and OK-02F**-04: Ultra-Compact 0.4mm Pitch Board-to-Board Connectors**

Introduction
OCN’s OK-02M**-04 (male header) and OK-02F**-04 (female header) represent a cutting-edge solution for high-density, low-profile interconnections in modern electronics. Designed with a 0.4mm pitch and a 1.5mm mating height, these board-to-board (B2B) connectors are engineered to meet the demands of space-constrained applications while delivering reliable performance. Ideal for consumer electronics, medical devices, industrial systems, and automotive applications, this series combines miniaturization with durability, making it a versatile choice for next-generation product designs.

                                                                              OK-02M**-04 (male) 

OK-02F**-04 (female) 

Product Overview
The OK-02M**-04 (male) and OK-02F**-04 (female) connectors feature a compact, dual-row design optimized for high-density PCB layouts. The 0.4mm pitch ensures maximum signal integrity in tight spaces, while the 1.5mm ultra-low mating height enables seamless vertical stacking of circuit boards. Both series are available in multiple pin configurations (denoted by "**" in the model number), offering flexibility for diverse design requirements.

Key Features

1. Ultra-Miniature Design:

• 0.4mm Pitch: Enables high-density layouts, ideal for compact devices.

• 1.5mm Mating Height: Reduces vertical space consumption, critical for slim-profile electronics like wearables and smartphones.

2. High Reliability:

• Precision-molded housings made of high-temperature-resistant LCP (Liquid Crystal Polymer) ensure stability under thermal stress.

• Phosphor bronze contacts with gold plating (0.2µm min) provide low contact resistance and corrosion resistance.

3. Robust Performance:

• Rated for 50V AC/DC and 0.3A per contact, suitable for low-power signal transmission.

• Operating temperature range: -40°C to +85°C, ensuring functionality in harsh environments.

4. Secure Mating Mechanism:

• A reinforced locking system prevents accidental disconnections caused by vibration or shock.

• Smooth insertion/withdrawal force (<10N) simplifies assembly and maintenance.

5. Compliance:

• RoHS and REACH compliant, aligning with global environmental standards.

Technical Specifications

• Pitch: 0.4mm

• Mating Height: 1.5mm

• Contact Resistance: ≤30mΩ

• Insulation Resistance: ≥100MΩ (at 500V DC)

• Durability: 30 mating cycles minimum

• Current Rating: 0.3A per contact

• Voltage Rating: 50V AC/DC

Applications

1. Consumer Electronics:

• Smartphones/Tablets: Connect mainboards to sub-PCBs for cameras, sensors, or displays.

• Wearables: Enable lightweight, low-profile designs in smartwatches and fitness trackers.

• IoT Devices: Facilitate modular designs in smart home sensors and hubs.

2. Medical Devices:

• Portable Monitors: Ensure reliable connections in compact patient monitoring systems.

• Diagnostic Tools: Support high-density interconnects in handheld ultrasound or glucose meters.

3. Industrial Automation:

• Robotics: Link control boards in robotic arms or drones requiring vibration resistance.

• Sensor Modules: Connect micro-sensor arrays in industrial IoT (IIoT) systems.

4. Automotive Electronics:

• Infotainment Systems: Interface display panels and control units in dashboards.

• ADAS Modules: Provide stable connections for LiDAR, radar, or camera PCBs.

5. Other Emerging Technologies:

• Drones: Minimize weight and space in flight controllers.

• AR/VR Headsets: Enable slimline designs for display and sensor interconnections.

Advantages Over Competing Solutions

• Space Efficiency: The 0.4mm pitch outperforms standard 0.5mm connectors, freeing up 20% more PCB area.

• Enhanced Durability: Gold-plated contacts and LCP housing extend lifespan compared to nylon-based alternatives.

• Design Flexibility: Multiple pin counts allow customization for prototypes and mass production.

Conclusion
OCN’s OK-02M**-04 and OK-02F**-04 series redefine miniaturization in B2B connectivity. By combining ultra-fine pitch, rugged construction, and versatile configurations, these connectors empower engineers to push the boundaries of product design in industries where space and reliability are paramount. Whether for consumer gadgets, mission-critical medical equipment, or automotive innovations, this series delivers a future-proof interconnection solution.

For OEMs and designers seeking to optimize PCB layouts without compromising performance, OCN’s 0.4mm pitch connectors offer the perfect balance of size, strength, and scalability.