The Siemens SENTRON 3VA2040-5HN32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated at 40 A continuous current, designed for line protection in distribution panels and motor branch circuits.
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That spread covers most low-voltage fault scenarios in North American and IEC panels.
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and DIN-rail mounting bases without re-drilling. Front face carries IP40 protection, adequate for enclosed distribution panels.
Thermal performance and operating range
Rated current holds at 40 A across the full ambient range from 40 °C to 70 °C — no derating needed in warm enclosures. Operating temperature spans -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Maximum power loss is 2.2 W, which keeps heat dissipation manageable in dense panels.