63 A MCCB with 187 kA interrupting capacity — motor protection variant
Its interrupting capacity hits 187 kA at 240 V, then steps down through 121 kA at 415/440 V, 75.6 kA at 500 V, and 17 kA at 690 V — a voltage sweep that matters when you are coordinating downstream devices across a mixed-voltage distribution board. This is the motor protection version, fitted with an ETU350M electronic trip unit. Thermal derating is published from 40 °C through 70 °C: the breaker holds 63 A up to 50 °C, then drops to 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C.
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA2 footprint that drops into the same DIN-rail or mounting-plate cutout as other 3VA2 frames. Maximum power loss is 75 W at rated current.
The breaker carries the SENTRON brand and is designed to IEC/EN 60947-2.