Siemens 3VA1040-4ED32-0AD0 — 40 A SENTRON MCCB with TM210 Release
The Siemens 3VA1040-4ED32-0AD0 is a 3-pole SENTRON molded case circuit breaker rated for 40 A continuous current at 40 °C, using a TM210 thermal-magnetic overcurrent release. It carries a 121 kA interrupting capacity at 240 V and 75.6 kA at 415 V, which means it can safely clear high-fault currents in distribution panels without upstream coordination issues. The breaker is fitted with three auxiliary switches (HQ type) for status feedback to a PLC or annunciator panel.
What the Ratings Mean for Your Panel
The 40 A rating holds flat from 40 °C to 50 °C — no derating needed in a typical ventilated enclosure. Above 55 °C it drops to 38.4 A, and at 70 °C it reaches 36 A. If your panel runs hot near the top of the gland plate, account for that thermal curve. The 121 kA at 240 V is the short-circuit current rating (SCCR) at that voltage; at 415 V it's 75.6 kA, and at 690 V it's 11.9 kA. These figures govern where the breaker can be installed in the fault-current hierarchy of the distribution board. The TM210 release is a fixed thermal-magnetic type — no electronic adjustment beyond the time-delay setting (tr max adjustable to 1 s). It provides line protection (cable and busbar) rather than motor or generator protection. There is no undervoltage release, no shunt trip, no ground-fault monitoring, and no communication function on this variant. The auxiliary contacts (3 HQ switches) are wired separately for remote status; the breaker itself has no trip indicator on the front.
Mounting and Integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. It mounts on a DIN rail or directly to a backplate via the SENTRON mounting base. The IP40 front protection means it's suitable for enclosed panels where tools are required to access live parts — not for washdown or outdoor locations. The 3-pole design covers three-phase circuits; the neutral is not switched through this unit.