The Siemens 3VA2040-6HN46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current with a maximum breaking capacity of 242 kA at 240 V.
This MCCB's interrupting rating drops with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. The 3 kA at 690 V is the weak point — verify the available fault current at that voltage before specifying for 690 V applications.
Rated current and thermal performance
Continuous current rating holds at 40 A across the full operating temperature range from -25 °C to 70 °C, with no derating needed.
Dimensions: 181 mm high, 140 mm wide, 86 mm deep. The 4-pole width of 140 mm is standard for SENTRON 3VA2 frames — verify the existing panel cutout and DIN rail alignment if replacing a different brand or older series. No undervoltage release or communication module fitted on this variant.