Siemens SENTRON 3VA2110-5HL36-0AF0 — 100 A MCCB, Line Protection
The Siemens SENTRON 3VA2110-5HL36-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range of 40 °C to 70 °C, meaning no derating is needed in a warm enclosure — it holds 100 A at every point in that span. This MCCB is designed for line protection, not motor or feeder backup — it protects the cable or busbar directly downstream of the breaker, tripping on overload and short-circuit without the intentional delay a motor-circuit protector would carry.
Interrupting Capacity — What the Ratings Mean
The interrupting capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At 240 V this breaker can safely clear a fault up to 187 kA without rupturing — that is the SCCR the breaker itself contributes to the panel label. At 690 V the capacity drops to 3.7 kA, so on a 690 V system the available fault current must be verified against that lower figure. Rated insulation voltage is 800 V, which governs the dielectric withstand of the internal clearances — the breaker is physically rated for the 690 V system voltage class, but the interrupting rating at that voltage is the binding constraint for coordination studies.
Fit and Panel Integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. The 86 mm depth is the dimension from the mounting surface to the front of the breaker — relevant when the panel depth is tight and the door clearance or gland-plate space is limited. The breaker includes one auxiliary switch and one trip alarm switch (HQ design) for remote status indication — the auxiliary follows the breaker position (ON/OFF), the trip alarm signals only when the breaker has tripped on fault, not when manually switched off. No undervoltage release, no voltage trigger, no ground-fault monitoring, and no communication function are fitted on this variant — it is a plain thermal-magnetic line-protection breaker with basic auxiliary contacts.