The LA1LC070MC is a TeSys-series undervoltage trip (undervoltage release) from Schneider Electric, designed to drop out a contactor or motor starter when the control voltage falls below a set threshold. It is a service part in the 18402-WORLD SERVICE PARTS(CONTROL ACCESS) category, sold as a set of 10 units.
Rated for a control circuit voltage of 230...240 V AC at 60 Hz. The threshold tripping voltage is 0.35...0.7 Uc — meaning it will release (trip) when the voltage drops to between roughly 80 V and 168 V on a 240 V nominal line. The 0.2 s time delay prevents nuisance tripping on brief sags, so it won't drop out during a momentary dip that a motor starting transient might cause. Hold-in power consumption is 4 VA AC; inrush at pickup is 8 VA AC. The control circuit voltage limits are 0.8...1.1 Uc, so the coil will pick up reliably at 80% of nominal and hold in up to 110%.
Deployment Context
This undervoltage trip mounts directly onto TeSys D or TeSys F contactors and starters. It's a standard panel component for motor control centers where undervoltage protection is required by code or by the machine safety circuit — typically on conveyor lines, pumps, or compressors where an unexpected restart after a power dip could be a hazard.
The LA1LC070MC carries an Active lifecycle status from the manufacturer.