What this MCCB carries and why it matters
The Siemens SENTRON 3VA1110-6GF46-0KF0 is a 4-pole molded case circuit breaker (MCCB) rated 100 A continuous at 40 °C, designed for line protection in distribution panels. Its interrupting capacity reaches 220 kA at 240 V and still holds 154 kA at 415 V — that SCCR headroom means it can be placed upstream of a fault-heavy bus without coordination worries. At 690 V it still clears 17 kA, so it covers 480Y/277 V and 600 V class systems with margin. The 800 V rated insulation voltage confirms it is built for industrial voltage levels, not just commercial.
Thermal derating and real-world current
The breaker holds its full 100 A rating up to 50 °C ambient (–). At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A (–). If the panel runs hot — say a packed enclosure near a furnace line — factor that 9 A drop at the top end. Maximum power loss is 25 W, which matters for internal enclosure heating calculations.
Built-in auxiliaries and releases
This unit ships with a shunt trip (STL) release and a 1 auxiliary switch + 1 trip alarm switch HQ configuration. The trip indicator and voltage trigger are present. No undervoltage release, no ground-fault monitoring, no communication module. If the BOM calls for those, this is the base protection block — add external modules or pick a different variant.
Production status and sourcing posture
Lifecycle is marked current — Siemens still builds this order code. No LTB or phase-out notice. Sourced to order against an RFQ through independent distribution.