U-Type Square Hole Pin Header, 2.54×2.54mm Single Row 1×3P (Middle Pin Vacant), Double-layer Plastic Insulator, 180° Orientation

Our U-Type Square Hole Pin Header supports diversified customized specifications to meet the differentiated docking needs of different PCB boards and equipment. All products are manufactured with high-precision molds and automated production processes, with accurate dimensions and stable performance. The detailed technical parameters are as follows:

1. Product Specifications

The overall structure adopts a classic U-shaped right-angle bending design, which realizes horizontal mounting on the PCB board, greatly reducing vertical installation space. The square hole positioning structure is matched with precise pin body calibration, which improves the assembly accuracy by 30% compared with round hole pin headers.and the pin length, bending angle, and tail size can be customized according to customer drawings and sample requirements.

1. Material Configuration

The insulating part is made of high-quality PA6T polyester material, which reaches UL94 V-0 flame retardant grade, with excellent high temperature resistance, insulation performance, and anti-aging ability. It will not deform, melt or produce harmful substances in high-temperature working environments. The conductive contact pin is made of high-purity brass with good electrical conductivity and ductility, effectively reducing current loss and ensuring stable signal transmission. The surface of the pin is treated with double-layer electroplating: the bottom layer is 50μ nickel plating to enhance adhesion and anti-oxidation performance, and the surface layer is gold or tin plating options, which can resist corrosion and avoid poor contact caused by long-term oxidation.

2. Electrical Performance Parameters

The product has excellent electrical conductivity and stable load capacity.

Current rating：3.0AMP

Contact resistance：30mΩ Max

Insulation resistance:1000mΩ Min,which can effectively avoid current leakage and signal interference.

Withstand voltage:600V AC/minute,ensuring safe and stable operation of the circuit. The electrical performance is stable in a wide temperature range, without virtual connection or signal attenuation.

3. Environmental & Mechanical Parameters

The working temperature range is -40℃ to +85℃, adapting to harsh working environments such as low-temperature cold storage and high-temperature industrial operation. The mechanical plugging life can reach more than 1000 times, with tight plugging and pulling feel, no loose pin drop phenomenon. The product has good vibration resistance and impact resistance, and can maintain stable connection in equipment vibration and transportation processes. All products comply with RoHS environmental protection directives, non-toxic and pollution-free, meeting global electronic product environmental protection standards.

Compared with traditional straight pin headers and ordinary U-type round hole pin headers, our U-Type Square Hole Pin Header has obvious competitive advantages in structural design, performance stability, installation adaptability and service life, which can effectively optimize product design and reduce equipment failure rate for customers.

1. Unique Square Hole Positioning, Higher Assembly Accuracy

The square hole matching design abandons the defect of easy offset of round hole positioning. During PCB welding and equipment assembly, it can realize precise positioning and automatic docking, effectively avoid pin deviation and welding offset problems. It is more suitable for automated assembly and mass production, greatly improving production efficiency and product yield, and reducing manual assembly errors and rework costs.

2. U-Shaped Right-Angle Structure, Space-Saving & Flexible

Accurate positioning during insertion without offset The U-shaped square hole clamps PCB pads tightly. The straight 180° vertical structure inserts perpendicularly into PCB holes. It stays well-limited during manual insertion or wave soldering automatic plug-in, free of tilting or floating pins.

High compatibility with automated production lines It adopts standard 2.54mm pitch for wide general use, matching automatic pin insertion machines and assembly line stations. The double-layer plastic structure enables stable gripping by manipulators without slipping, greatly boosting plug-in efficiency and cutting manual assembly labor hours.

Easy soldering, compatible with both wave soldering and manual soldering Vertical through-hole pins fully penetrate PCBs for complete solder coverage on pads. The U-shaped opening expands solder wetting area, ensuring full solder adhesion and lowering the defect rate of cold solder joints and virtual soldering.

3. Excellent Material Performance, Durable & Stable

High-purity brass pins ensure low resistance and high-efficiency signal and current transmission, avoiding signal delay and current overload failure. The high flame-retardant PA6T insulating material has strong heat resistance and anti-aging ability, which can resist high-temperature baking during welding and long-term high-temperature operation of equipment, and will not deform or crack. The nickel-gold/tin plating process effectively isolates air oxidation and electrochemical corrosion, adapts to humid, dusty and other harsh environments, and greatly extends the service life of the connector.

4. Strong Anti-Vibration & Anti-Loosening Ability

The U-type integral forming structure and square hole limit design make the pin and insulator fit tightly, without gaps and looseness. In vibrating working environments such as industrial equipment and automotive electronics, it can always maintain a stable connection state, effectively prevent virtual connection, power failure and signal interruption caused by vibration, and improve the overall operational stability of electronic equipment.

5. Diversified Customization & Wide Compatibility

We support full-spec customization of pitch, pin number, pin length, plating process, and bending size. The product is highly compatible with mainstream PCB board designs and terminal sockets on the market, with strong versatility. It can meet the personalized connection needs of different industries and different equipment models, and provide one-stop customized connection solutions for customers.

6. High Cost Performance & Certified Quality

All products are produced by automated assembly lines, with stable quality and sufficient inventory. While ensuring high-standard performance and safety certification, we control production costs efficiently, providing customers with cost-effective connector products. Strict quality inspection is implemented from raw material incoming inspection, production processing to finished product delivery, and every batch of products has reliable quality traceability.

Relying on stable electrical performance, reliable mechanical structure and strong environmental adaptability, our U-Type Square Hole Pin Headers are widely used in various electronic equipment that requires precise connection, space saving and high stability, covering civilian, industrial, automotive, smart and communication fields.

Consumer Electronics: It is suitable for smart phones, tablet computers, Bluetooth headsets, wearable devices, power banks, chargers and other miniaturized consumer electronic products, realizing internal circuit board docking and signal transmission, adapting to the ultra-thin and compact design trend of consumer electronics.

Industrial Control Equipment: Applied to PLC controllers, industrial computers, sensors, instrumentation equipment, automation control modules and other industrial equipment. It can adapt to high-temperature, vibrating and dusty industrial working environments, ensuring long-term stable operation of industrial control circuits and reducing equipment failure rates.

Automotive Electronics: Widely used in automotive central control systems, vehicle-mounted communication modules, automotive sensors, power management systems and other parts. With excellent vibration resistance, high temperature resistance and anti-oxidation performance, it meets the high-reliability connection requirements of automotive-grade electronic components.

Smart Home Devices: Suitable for smart speakers, smart cameras, smart lighting, intelligent switches, household appliances and other smart home equipment, realizing stable connection of internal circuits, ensuring the long-term stable operation of smart home equipment and improving product durability.

Communication Equipment: Used in routers, switches, optical communication modules, base station auxiliary equipment and other communication products, ensuring high-speed and stable signal transmission, avoiding signal interference and attenuation, and guaranteeing the efficient operation of communication equipment.

Medical & Precision Instruments: Applied to precision medical testing equipment, laboratory instruments and other high-precision equipment. With high assembly accuracy and stable electrical performance, it meets the strict connection standards of precision electronic equipment and ensures accurate data transmission.

To help customers quickly understand our U-Type Square Hole Pin Header products and solve purchasing and application problems, we have sorted out the most common customer questions and professional answers as follows:

Q1: What are the differences between U-type square hole pin header and ordinary round hole pin header?

The core difference lies in the positioning accuracy and structural stability. The square hole design realizes full-angle limit positioning, which completely avoids the left-right offset problem of round hole pins during assembly and welding, with higher assembly precision and better consistency. In addition, the square hole matching structure has tighter plugging performance, stronger anti-vibration and anti-loosening ability, and more stable long-term use performance, which is more suitable for automated mass production and high-reliability equipment scenarios.

Q2: Can you provide customized specifications and samples?

Yes. We support full-range customized services, including non-standard pitch, special pin number, customized pin length and bending size, different plating processes (gold plating/tin plating), and insulating material upgrades. We can provide free sample testing for customers, and support small-batch trial production and large-batch mass production. Customers can provide drawings or samples for personalized customization.

Q3: What is the working temperature range and service life of the product?

The product's normal working temperature range is -40℃ to +85℃, which can adapt to most indoor, outdoor and industrial working environments. The mechanical plugging service life is more than 1000 times, and the static connection service life can reach more than 8 years under normal working conditions. It has excellent anti-aging and anti-corrosion performance, and can maintain stable performance in long-term continuous working state.

Q4: Are your products compliant with environmental protection and safety certifications?

All our U-type square hole pin headers fully comply with RoHS environmental protection directives and reach international environmental protection standards, without harmful substances. The insulating material has passed UL94 V-0 flame retardant certification, with good flame retardant and safety performance. All products are inspected in strict accordance with international industry standards, with reliable quality and can be exported to global markets.

Q5: What is the delivery cycle and MOQ of the product?

For conventional standard specifications, we have sufficient spot inventory, with a delivery cycle of 3-5 working days. For customized products, the delivery cycle is 7-15 working days according to the customization difficulty and order quantity. Our minimum order quantity is flexible, supporting small-batch trial orders and large-batch bulk orders, to meet the procurement needs of different customers such as enterprises, factories and R&D institutions.

Q6: How to ensure the product welding effect and assembly stability?

Our products adopt high-precision integral molding process, with smooth pin surface, uniform size and no burrs, which is convenient for welding operation and not easy to produce virtual welding and missing welding. The square hole positioning structure can accurately match the PCB board hole position, effectively improving welding accuracy and firmness. After professional testing, the product has strong welding firmness, no pin falling off and desoldering phenomenon in vibration and high-temperature environment.

We are a professional manufacturer of electronic connector products, focusing on the R&D, production and sales of various pin headers, female headers, terminal connectors and precision electronic accessories. With advanced production equipment, perfect quality inspection system and rich customization experience, we are committed to providing global customers with high-quality, low-cost and high-reliability connector solutions.

We sincerely welcome customers from all over the world to consult product parameters, customized solutions, factory inspection and order cooperation. Whether you need standard product procurement or personalized non-standard customization, we can provide you with professional one-stop service. Our professional sales and technical team will respond to your inquiry within 24 hours, provide accurate product quotations and technical support, and solve all your product selection and application problems.