Siemens SENTRON 3VA1080-3ED36-0JA0 — 80 A MCCB with Shunt Trip
The Siemens SENTRON 3VA1080-3ED36-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A at 40 °C, designed for line protection in distribution panels. It carries a 75.6 kA interrupting capacity at 240 VAC, stepping down to 7.5 kA at 690 VAC — the 240 V figure is the one that governs most North American feeder applications, while the 690 V rating confirms it handles European 400 V industrial grids with headroom. The integrated shunt trip (STL) release lets a remote signal or safety circuit trip the breaker independently of overload or short-circuit conditions, which is typical for emergency-off or interlock schemes. Rated insulation voltage is 800 V, so the internal clearance and creepage support 690 VAC systems without derating the basic insulation level. The TM210 thermal-magnetic release provides inverse-time overload protection and instantaneous short-circuit response — standard for motor branch circuits and general distribution where no electronic adjustment is needed. Maximum power loss at rated load is 19.2 W, a figure to check against enclosure thermal budgets if several breakers are ganged in a sealed panel. This is an active-production part, sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Dimensions and Panel Fit
The breaker measures 70 mm deep × 76.2 mm wide × 130 mm high. The 76.2 mm (3 in) width is the standard footprint for a 3-pole SENTRON 3VA frame at this rating — it occupies three 25 mm module positions on a DIN rail or mounts directly on a backplate with the supplied screws. The 70 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters; verify against your panel's internal clearance if you're retrofitting into a shallow box.
Breaking Capacity by Voltage — Selectivity Planning
The interrupting ratings span the voltage range a panel builder actually encounters: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V (–). For a 400 V distribution board with 50 kA available fault current, this breaker's 52.5 kA at 415 V gives a slim margin — coordination upstream with a current-limiting fuse or a higher-rated SENTRON 3VA frame is worth modeling if the transformer size pushes fault levels above 50 kA. At 240 V the 75.6 kA covers virtually all North American panelboard applications.
Temperature Derating Curve
The breaker holds a full 80 A from 40 °C through 50 °C (–). At 55 °C it derates to 78 A, at 60 °C to 77 A, and at 65 °C to 75 A (–). At 70 °C it still carries 74 A. The operating range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. If the breaker sits next to a heat source or in an unventilated enclosure, the 65 °C derating point is the one to design around — losing only 5 A from the nominal rating means the thermal design is forgiving.