80 A, 4-pole MCCB with TM210 release — line protection for distribution panels
The Siemens 3VA1080-2ED42-0AA0 is a 4-pole molded case circuit breaker from the SENTRON 3VA series, rated for 80 A continuous at 40 °C and configured for line protection. It carries a TM210 thermal-magnetic release — the fixed thermal element and fixed magnetic trip are factory-set, so no field adjustment of the trip curve is needed. This is the version you spec when the BOM calls for a non-communicating, no-ground-fault, no-N-conductor-protection MCCB that simply clears overloads and short circuits in a distribution panel.
Breaking capacity — what the numbers mean for your fault duty
This MCCB delivers 52.5 kA at 240 V AC, 32 kA at 415 V AC, 13.6 kA at 440 V AC, and 7.5 kA at both 500 V and 690 V AC. The 32 kA at 415 V is the number most panel builders will check first — it tells you the breaker can safely interrupt a fault up to that current without welding contacts or venting plasma into the enclosure. If your service entrance or distribution board has an available fault current above that at the breaker's line side, you need a current-limiting upstream device or a higher-rated frame. The 7.5 kA at 690 V covers 690 V line-line distribution where it's still common in European and marine installations.
Thermal derating — don't size on the 40 °C number alone
The 80 A rating holds flat from 40 °C to 50 °C. Above that, it starts to taper: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. If this breaker lives in a non-air-conditioned electrical room that hits 55 °C in summer, you lose 2 A — not much, but enough to nuisance-trip if the load is right at 80 A. The thermal element in the TM210 release responds to ambient heat, so a hot panel reduces headroom. The operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Panel fit and wiring — 101.6 mm wide, 70 mm deep, 130 mm tall
The breaker occupies 101.6 mm (4 in) of width on the DIN rail or mounting plate, with a depth of 70 mm (2.76 in) and height of 130 mm (5.12 in). That width is the critical dimension for multi-breaker layouts — a 4-pole at 101.6 mm means it takes the same space as two standard 2-pole 3VA frames side by side. The front face carries an IP40 rating, so it's protected against tools and wires >1 mm but not against water ingress; keep it inside a sealed enclosure if washdown is nearby. Max power dissipation is 19.2 W — negligible for thermal planning in a ventilated panel, but worth noting if the breaker is in a sealed, densely packed cabinet.
Key specs at a glance
Rated insulation voltage Ui is 800 V. Maximum rated operational voltage with DC is 600 V. The breaker is a line-protection version with no communication function, no ground-fault monitoring, and no N-conductor protection. The TM210 release is a fixed thermal-magnetic type — the '210' designates the frame size and trip unit family within the 3VA platform. The product reference code per IEC 81346-2 is Q (switching device).