The JF5 series plate screw-type terminal blocks from Zhejiang SIPUN Electric Co., Ltd. are engineered to deliver uncompromising reliability, safety, and flexibility for electrical wiring applications. Designed for use in AC circuits (50/60 Hz, rated up to 660V) and DC circuits (rated up to 440V), these terminals accommodate solid copper conductors ranging from 0.75mm² to 25mm², making them ideal for low-voltage switchgear, control panels, and industrial automation systems.
Unmatched Mechanical and Electrical Reliability
To validate the robustness of every connection, SIPUN subjects JF5 terminals to rigorous pull-out tests in accordance with GB/T 14048.1-2006 (the general standard for low-voltage switchgear and controlgear). Even when subjected to twice the specified tensile force outlined in the standard, the conductors remain securely locked in place, demonstrating exceptional resistance to vibration, shock, and long-term loosening.
The terminals’ internal conductive bars feature a precision deep-drawn, flared-thread design that maximizes thread engagement with the clamping screw. Whether constructed from copper or steel, all screws fully comply with national standards, ensuring consistent torque retention and low contact resistance over the product’s entire service life.
Flexible Wiring Options for Every Application
The JF5 series supports multiple wiring configurations to suit diverse installation needs:
- Direct solid wire connection: Bare, unprocessed solid copper conductors can be securely clamped directly into the terminal, eliminating the need for additional prepping tools.
- Crimp lug compatibility: The terminals are fully compatible with TU/TO series crimp lugs, providing a reliable solution for stranded conductors and high-vibration environments.
- Looped single-wire connection: Single-strand solid wires can be pre-looped for added mechanical stability, offering a proven method for high-reliability installations.
Superior Safety and Environmental Performance
Constructed from high-grade PC (polycarbonate) insulation material, the JF5 series meets the most stringent safety requirements:
- Flame resistance: The material passes the 960°C glow-wire test, a critical safety benchmark that verifies resistance to ignition and flame spread in the event of electrical faults.
- Wide operating temperature range: Designed to perform reliably in ambient temperatures up to 120°C, ensuring stable performance even in high-heat industrial environments.
- Full regulatory compliance: The JF5 series complies with key international and national standards, including GB/T 14048.1-2006, JB/T 9659.1-2006, and IEC 60947-7-1:2006, providing customers with the confidence of globally recognized safety and performance certifications.
From its robust mechanical design to its flexible wiring options and industry-leading safety credentials, the JF5 series terminal blocks from SIPUN set a new standard for reliable, cost-effective electrical connections in industrial applications.
Post time: May-11-2026