The Siemens SENTRON 3VM1112-5ED32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated 125 A at 40 °C, with a TM210 thermal-magnetic release for line protection. Its interrupting capacity reaches 187 kA at 240 V AC, 121 kA at 415 V AC, 76 kA at 440 V AC, and 17 kA at 500 V AC — figures that govern selectivity and SCCR coordination in the distribution panel.
Thermal derating and operating range
The 125 A rating holds from 40 °C through 50 °C. Above that, the continuous current derates per the datasheet curve: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Ambient temperature inside the enclosure governs the usable ampacity — a panel running at 60 °C loses 5 A of headroom versus the 40 °C nameplate.
Lifecycle and sourcing
This part carries a current-production lifecycle status. It is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Physical fit and panel integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The 3-pole footprint fits standard SENTRON MCCB mounting positions in distribution boards. IP40 on the front face means the breaker is protected against solid objects larger than 1 mm but not sealed against moisture — suitable for indoor panel installation, not washdown environments.
Voltage ratings and release design
Rated operational voltage is 690 V AC and 500 V DC. The TM210 release is a fixed thermal-magnetic design — no adjustable I²t trip curve, no ground-fault monitoring, and no undervoltage release or communication function built in. Insulation voltage is rated 800 V. Maximum power loss is 23 W.
Environmental limits
Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The storage minimum is the more stringent limit for warehousing and shipping conditions.