What this 3VA1 MCCB carries
The Siemens 3VA1110-5MH36-0BC0 is a 3-pole IEC frame 160 MCCB rated 100 A continuous, with a 55 kA interrupting capacity at 415 V AC (breaking capacity class M). That Icu figure means it can safely clear a bolted fault up to 55 kA without welding its contacts or rupturing the arc chamber — critical for high-fault panels near large transformers or motor control centers. The TM120M thermal-magnetic trip unit provides starter protection: the thermal element tracks motor heating, the magnetic pickup is adjustable from 5 to 15 times In (500–1500 A) for short-circuit-only protection — no overload function in this variant, so upstream or separate overload relay handles running overcurrent. It ships with a 24 V DC undervoltage release (UVR) that drops the breaker on loss of control voltage, plus two auxiliary switches (HQ type) for status feedback to a PLC or annunciator. Terminals are clamp-type, accepting copper or aluminium conductors up to the frame's rating.
Lifecycle and sourcing posture
For a critical-spare holding or a new BOM line, this 3VA1 variant is sourced to order against an RFQ. Availability and current pricing are confirmed at quote time through independent distribution.
Panel integration notes
The 3VA1 frame 160 mounts on a DIN rail or panel baseplate; the clamp terminals accept cable lugs or direct conductor insertion. The UVR coil draws a holding current at 24 V DC — verify the control transformer can supply the inrush without dropping below the UVR's dropout threshold.