The Schneider TeSys LA1LC071FC is a shunt trip — an instantaneous voltage release that trips a circuit breaker or contactor when its control voltage is applied. It operates on a 120 V AC 60 Hz control circuit, with a threshold tripping voltage of 0.35 to 0.7 Uc and a control voltage tolerance of 0.7 to 1.1 Uc. The operating time is at least 10 ms, and it has no intentional time delay. It is supplied as a set of 10 units.
The 120 V AC 60 Hz control voltage is the coil rating — apply that to trip the shunt. The 0.35 to 0.7 Uc threshold means the trip will initiate when the voltage drops to between 42 V and 84 V, which is typical for undervoltage release coordination. The inrush power draw is 8 VA AC, and hold-in power is 4 VA AC — small enough that the control transformer sizing is rarely a concern. The set of 10 is the factory packaging; if you need fewer, you will have to break the pack.