SENTRON 3VA1040-3ED32-0HA0 — 40 A MCCB with TM210 Release
The Siemens SENTRON 3VA1040-3ED32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 40 A, carrying the TM210 thermal-magnetic overcurrent release. This line-protection version is designed for distribution panels where the primary duty is protecting cable and bus runs from overload and short-circuit faults. Breaking capacity is declared at multiple voltage levels: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. These figures govern the available fault current the breaker can safely interrupt at the point of installation — match them to your system's prospective short-circuit current (PSCC) at the panelboard. The TM210 release is a fixed thermal-magnetic trip unit; no electronic adjustment or communication functions are fitted. This keeps the breaker simple and repeatable for standard feeder protection where field-adjustable curves are not required.
Panel Integration and Mounting
Footprint dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The width is a standard 3-pole MCCB module pitch, fitting SENTRON panelboards and distribution blocks without adapters. Front-face protection is IP40, meaning the breaker is protected against tools and solid objects larger than 1 mm but not sealed against moisture — suitable for indoor panel installation where the enclosure provides the environmental seal. The breaker ships without auxiliary contacts or an undervoltage release as standard. A shunt trip (STL) release is designed in, order code 3VA9688-0BL30, for remote tripping applications where you need to cut power from a pushbutton or safety circuit.
Thermal Derating and Operating Range
Rated continuous current holds at 40 A from 40 °C through 50 °C ambient. Above that, derating begins: 38.4 A at 55 °C, stepping down to 36 A at 70 °C. The operating ambient range is -25 °C to +70 °C, with storage from -40 °C to +80 °C. Rated insulation voltage Ui is 800 V, confirming the breaker's suitability for 690 V systems with adequate margin.