The Siemens 3VA1112-5MH36-0AD0 is a 3-pole IEC frame 160 molded-case circuit breaker rated 125 A continuous, with a breaking capacity of 55 kA at 415 V AC — that is the 'M' class rating, meaning it can safely interrupt fault currents up to that level without upstream cascading. The TM120M thermal-magnetic trip unit provides starter protection: the magnetic pickup is adjustable from 5 to 15 times In (so 625 A to 1875 A short-circuit pickup), and the thermal element is fixed at 125 A. Note the 'without overload protection' in the description — this variant ships without the overload relay module (AM), so it acts as a magnetic-only short-circuit protector for motor starter applications where a separate overload relay handles the thermal curve.
Siemens 3VA1112-5MH36-0AD0 Circuit Breaker, 125A, 55kA @ 415
Siemens 3VA1 IEC frame 160 MCCB, breaking capacity class M, Icu=55kA @ 415V, 3-pole, starter protection TM120M, AM, In=125A, without overload protection, short-circuit protection Ii=5...15 x In, clamp connection, 3 auxiliary switches HQ.
Product details
Frequently asked questions
What is the breaking capacity of this MCCB?
Rated Icu = 55 kA at 415 V AC (breaking capacity class M on the 3VA1 IEC frame 160). This is the maximum fault current the breaker can safely interrupt without damage.
Does this breaker include overload protection?
No — the description states 'without overload protection'. It ships with the TM120M thermal-magnetic trip unit but the thermal (overload) function is disabled; only the magnetic short-circuit protection (Ii adjustable 5...15 x In) is active. A separate overload relay must be used for motor thermal protection.
Where can I buy 3VA1112-5MH36-0AD0?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer.