What this breaker is, and what the ratings mean for your panel
The Siemens 3VA1110-5EE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker rated 100 A continuous, with a breaking capacity class M of Icu=55 kA at 415 V. That 55 kA interrupting rating means it can safely clear a bolted fault up to that level without welding its contacts or rupturing the case — critical for maintaining selectivity in a distribution board where upstream breakers must stay closed during a downstream fault. The TM220 trip unit provides adjustable overload protection (Ir = 70…100 A) and a fixed short-circuit pickup at Ii = 10 x In. The thermal element tracks cable heating; the magnetic element clears hard shorts instantly. This variant ships with the N conductor unprotected (no integral neutral protection) and includes a nut keeper kit. It is configured for a DC Power OEM in China — the nut keeper kit simplifies bus-bar assembly in OEM switchgear builds where the breaker lands on a pre-drilled copper grid.
Lifecycle and sourcing posture
Sourcing is straightforward: the part is quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Integration into a panel or OEM assembly
The 3VA1 frame mounts on a standard DIN rail or can be screw-fixed to a backplate. The nut keeper kit supplied with this variant holds M6 or M8 bus-bar nuts captive during assembly — a time-saver on repetitive OEM builds where the breaker lands on a pre-drilled bus-bar grid. Four-pole configuration occupies the full width of a 4-module DIN cutout. Plan for side clearance per Siemens mounting instructions to allow arc-chamber gas venting.