125 A, 4-pole MCCB with TM210 release — 187 kA at 240 V
The Siemens 3VA1112-5ED42-0AA0 is a SENTRON molded case circuit breaker (MCCB) with four poles and a TM210 thermal-magnetic overcurrent release. It carries 125 A continuously at 40 °C, derating to 114 A at 70 °C, so it handles full-rated load in a warm panel without oversizing. The interrupting capacity hits 187 kA at 240 V AC and 121 kA at 415 V AC — high enough for most main-service or large-feeder applications where fault current is substantial.
Interrupting capacity across voltages
At 440 V AC the breaker still clears 75.6 kA, and at 500 V and 690 V it holds 17 kA. That spread means it can serve as a main breaker on a 480 V panel or a feeder breaker in a 690 V industrial system, though at higher voltages the available fault current must stay under 17 kA. The 187 kA at 240 V makes it a strong choice for large commercial services where utility fault levels are high.
Panel integration and environment
The 3VA1112-5ED42-0AA0 measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a compact 4-pole footprint that fits standard distribution panelboards. Front IP40 protection handles indoor panel environments; storage range from -40 °C to 80 °C covers warehouse and transport conditions. Maximum power loss is 28.1 W, which matters for thermal budgeting in a sealed enclosure.