It operates on a 48 V AC 60 Hz control circuit, with a tripping threshold of 0.7 to 0.35 times the rated control voltage (Un).
The rated insulation voltage (Ui) is 690 V AC per IEC 60947-1, 600 V AC per UL 60947-4-1 and CSA C22.2 No 60947-4-1. The control voltage limits are 0.85 to 1.1 Un, so the release holds in reliably as long as the 48 V supply stays between roughly 40.8 and 52.8 V AC. Inrush power draw is 8 W / 12 VA AC, dropping to 1.1 W / 3.5 VA AC holding. That low hold-in draw means the control transformer can be sized for the inrush peak without oversizing for continuous load. Mechanical durability is rated at 10,000 cycles with GV3P and GV3L breakers, and 30,000 cycles with GV2ME and GV2P — the release itself is robust, but its service life depends on the host breaker model. Screw clamp terminals accept 1 to 2.5 mm² solid or 0.75 to 2.5 mm² flexible wire, with or without ferrules. Tightening torque is under 1.4 N.m. The 18 mm width matches the standard TeSys Deca modular footprint, so it snaps onto the same DIN rail alongside the breaker or contactor.
The GVAU056 is classified as obsolete by the manufacturer.
This release mounts directly onto TeSys Deca breakers (GV3P, GV3L, GV2ME, GV2P) and contactors. It occupies one 18 mm module width on the DIN rail. The 66 mm depth and 89 mm height are standard for the accessory footprint, so it does not extend beyond the host device envelope. Wiring is straightforward: the two screw terminals connect to the 48 V AC control circuit; no auxiliary power supply is needed.