Tronic Mechanical Interlock for 150A 4-Pole Contactor

Our review

This Tronic mechanical interlock is a small but important safety part for anyone running two contactors in the same control circuit. It is made to sit between contactors rated at 150A with four poles, physically preventing both from closing at the same time. That matters most in changeover, reversing and star-delta arrangements, where a simultaneous close can cause a short circuit or damage a motor. It suits electricians, panel builders and maintenance teams working on industrial or commercial installations. Before ordering, confirm your contactor is rated 150A and has four poles, and check that its frame accepts a mechanical interlock, since fit varies between ranges. Compare it with electrical interlocks, which rely on wiring and can fail if a contact sticks, and with complete interlocked contactor assemblies, which cost more but remove the matching work. If you already have the right contactors, this is the simpler route. Available on Sokonia.