The Siemens SENTRON 3VA2140-5MN32-0DH0 is a 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, carrying a continuous current rating of 40 A across the full ambient range from 40 °C to 70 °C — no derating needed in a warm panel. Its interrupting capacity reaches 187 kA at 240 V AC, stepping down to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and 3.7 kA at 690 V. This breaker includes an undervoltage release (UVR) and a complement of two auxiliary switches plus one trip alarm switch, all factory-integrated. The basic switch assembly carries order code 3VA21405MN320AA0.
Panel fit and mounting
The 3VA2140-5MN32-0DH0 occupies a footprint of 105 mm width × 86 mm depth × 181 mm height — a standard SENTRON 3VA frame size that fits DIN-rail or screw-mounted panel layouts common in motor control centers. The 105 mm width (4.13 in) matches the three-pole form factor; verify gland-plate cutouts and phase-spacing if retrofitting into an existing MCC bucket. Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Maximum power dissipation at rated load is 4.1 W, which contributes negligible heat to the enclosure for thermal qualification (IQ/OQ) documentation.
Lifecycle and sourcing posture
Phase failure detection is built in, and a mechanical trip indicator provides local status confirmation — both features that support the audit trail during commissioning and periodic requalification.