Multicomp Pro Automotive SPST-NO PCB Relay, 5V DC, 35A

The Multicomp Pro Automotive PCB Relay is a single-pole, single-throw, normally open (SPST-NO) component designed for reliable switching in demanding vehicle applications. Engineered for a 5V DC nominal coil voltage, this robust relay delivers a high-current switching capacity of up to 35A, making it suitable for controlling fans, motors, lights, and other auxiliary circuits.

Its construction centres on a silver alloy (Ag alloy) contact material, which ensures excellent conductivity and a low initial contact resistance of less than 100mohm. The relay is built to withstand the harsh environment of an automotive engine bay, with a wide operating temperature range from -40°C to +85°C. Fast switching is guaranteed with a maximum operate and release time of just 10ms.

Key Electrical Specifications

• Coil Data: Nominal voltage of 5V DC with a coil resistance of 39Ω ±10%. This results in a nominal operating current of 128mA ±10% and a nominal power of 640mW. The coil can handle a maximum voltage of 6.5V DC.
• Contact Data: Maximum switching current is 35A, with a contact rating of 20A at 14V DC for resistive loads. The maximum switching voltage is 16V DC. It supports high continuous currents, rated for 35A for 10 minutes or 25A for one hour.
• Reliability Features: High insulation resistance (minimum 100MΩ at 500V DC) ensures safety and prevents leakage currents. The relay features a low minimum release voltage of 0.5V DC, ensuring reliable de-energisation.

Physically, this through-hole mount relay with PC pin terminals is designed for secure soldering onto printed circuit boards, providing a stable and vibration-resistant connection. Part of the MP Automotive Relays range, it is a trusted component for automotive electronics, OEM replacements, and custom vehicle modifications where durability and performance are non-negotiable.