Siemens SENTRON 3VA1010-4ED32-0HC0 — 100 A MCCB with Shunt Trip
The Siemens SENTRON 3VA1010-4ED32-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, carrying 100 A continuously at 40 °C ambient without derating. Its interrupting capacity reaches 121 kA at 240 V AC, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V — figures that cover most commercial and light-industrial fault-current scenarios without needing a current-limiting upstream device. The rated insulation voltage of 800 V gives headroom for 480/600 V class systems. This variant ships with a factory-installed shunt trip release (STL) and two HQ auxiliary switches, so it arrives ready for remote tripping and status feedback — no field-add-on kit required. The basic switch platform is order code 3VA10104ED320AA0, meaning the breaker core itself is a standard 3VA1010 frame; the -4ED32-0HC0 suffix specifies the trip unit, accessories, and terminal configuration.
Breaking Capacity and Thermal Derating
The 121 kA at 240 V AC is the highest short-circuit rating on this frame — useful for service-entrance or main-breaker positions where available fault current is high. At 415 V the rating drops to 75.6 kA, still sufficient for most 400 V distribution boards. Above 500 V the breaker holds 11.9 kA, which constrains its use on 690 V systems to locations with low prospective fault current. Thermal current rating holds flat at 100 A from 40 °C through 50 °C, then derates gradually: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. In a sealed, uncooled enclosure the panel designer should apply the 70 °C column (91 A) as the effective continuous rating. Maximum power dissipation is 25 W per pole — relevant for heat buildup in compact cabinets.
Panel Fit and Dimensions
Footprint is 76.2 mm wide by 130 mm tall by 70 mm deep. Mounts via screw-clamp to a backplate or DIN rail adapter.
Environmental and Compliance
Operating temperature range is -25 °C to +70 °C, with storage from -40 °C to +80 °C.