Siemens 3VA1116-6FF46-0AA0 — 80 A 4-Pole MCCB with TM240 Release
The Siemens 3VA1116-6FF46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated at 80 A continuous, 4-pole, with a TM240 thermal-magnetic overcurrent release. It's designed for line protection in distribution panels and motor control centers where you need high interrupting capacity and selective coordination. Breaking capacity varies significantly with system voltage: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA at 240 V makes this a strong choice for high-fault service-entrance applications on 240 V delta or 277/480 V wye systems where the available fault current is substantial. The TM240 release means the thermal element is calibrated for a 240 A frame — the breaker itself is rated 80 A, so the trip unit is set for that lower continuous current. This gives you flexibility: the same frame size can be adjusted down for different load requirements without changing the entire breaker.
Thermal Derating and Ambient Temperature
This breaker delivers its full 80 A rating from 40 °C through 50 °C — no derating needed in that range. At 55 °C it carries 158 A, at 60 °C it's 155 A, at 65 °C it's 153 A, and at 70 °C it's 150 A. That's a shallow derating curve, meaning the breaker holds up well in warm enclosures or panels near heat sources. Rated insulation voltage is 800 V, and the front face carries IP40 protection — fine for general indoor panel mounting. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The 38 W maximum power loss at full load is manageable; just ensure adequate ventilation in a densely packed enclosure.
Physical Fit and Panel Integration
Dimensions are 70 mm depth, 101.6 mm width, 130 mm height — a standard 4-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. The width at roughly 4 inches (101.6 mm) matches the typical 4-pole spacing in a distribution board. No undervoltage release, no voltage trigger, no communication function, and no ground-fault monitoring on this variant — it's a straight thermal-magnetic breaker for basic overcurrent and short-circuit protection.