The 80 A rating holds from 40 °C through 50 °C ambient; above that it derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C.
Breaking capacity — what voltage your fault sees
Interrupting ratings are voltage-dependent: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. At 690 V the 17 kA rating is still adequate for most industrial line-side applications, but verify against your transformer's nameplate fault duty.
Auxiliary switch complement and dimensions
No separate aux switch kit to order — it ships with the configuration built in. The 76.2 mm width (3 in) and 70 mm depth (2.76 in) are standard for a 3-pole 3VA frame; height is 130 mm (5.12 in). Panel cutout and bus-bar spacing match the SENTRON 3VA family footprint.