What this MCCB is and what it does
The Siemens SENTRON 3VA1180-5EF36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A at 40 °C, designed for line protection in distribution panels and industrial switchgear. It carries a rated insulation voltage of 800 V and delivers an interrupting capacity of 187 kA at 240 V AC — that figure drops to 121 kA at 415 V and 75.6 kA at 440 V, so the available fault current at your service voltage is the number that governs the installation's SCCR compliance. The breaker is fitted with a shunt trip (STL) release and two HQ auxiliary switches, per the design code. It is intended for line protection — not motor circuit protection — so the thermal-magnetic trip curve is calibrated for feeder and branch-circuit overcurrent, not the inrush profile of a motor start.
Current ratings across the ambient range
The 80 A rating holds steady from 40 °C through 50 °C. Above that the breaker derates: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. The maximum operating ambient is 70 °C; the minimum is -25 °C. Storage limits are -40 °C to 80 °C.
Interrupting ratings by voltage
The interrupting capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. For a 480 V panel the relevant figure is the 440 V rating — 75.6 kA — which is the nearest published point above 480 V. The 17 kA at 690 V confirms this breaker can be used on 600 V class systems where the available fault current stays under that threshold.
Physical fit and panel integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. It mounts on a DIN rail or directly to a backplate via the molded-case footprint standard for 3VA frame sizes. The 3-pole width of 76.2 mm (3 inches) matches the standard 3-inch per-pole spacing for panelboard and switchgear cutouts.
Lifecycle and sourcing posture
This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. The basic switch assembly is order code 3VA11805EF360AA0, which is the internal switching mechanism; the complete breaker as listed here includes that assembly plus the shunt trip and auxiliary switches.