WISDUM 10pcs 5V Bistable Relay Module Car Start Stop Self-Locking Switch

Module purpose and target use

This pack supplies ten 5 V bistable relay modules designed for automotive start-stop and self-locking switching tasks. Each unit toggles its output with a momentary button press or low-level signal, staying in the last state without continuous coil power. The modules suit hobbyists and installers adding latching control to lighting, accessories or custom car electronics.

Build integration and wiring

Each board measures 52.8 mm by 32 mm by 18 mm and fits into tight dash or engine-bay enclosures. The relay contacts are rated for a maximum of 10 A, so the switched load must stay below that limit. Connections use normally-open or normally-closed terminals chosen per application, and an onboard LED shows the active state. An external LED pad is provided for remote indication if required.

Thermals, noise and power draw

The coil operates from a 5 V supply and draws only brief current during state changes, keeping average dissipation low. With no moving parts while latched, the module runs silently and generates negligible heat in normal use. The specified operating temperature range covers typical vehicle interior conditions.