Siemens 3VA4195-4ED24-0AA0 — 15 A MCCB with 65 kA interrupting capacity
The Siemens SENTRON 3VA4195-4ED24-0AA0 is a 2-pole molded-case circuit breaker (MCCB) rated 15 A at 40 °C, with a TM210 thermal-magnetic release. Its interrupting capacity hits 65 kA at 240 V and 25 kA at 480 V — enough headroom for most distribution panels on a 480Y/277 V service where it still delivers 25 kA. The fixed instantaneous trip is set at 300 A (li min and max both 300 A), so it's a straight thermal-magnetic device, not a selective or electronic-trip variant. This is the system protection version (not a motor circuit protector or switch-disconnector), designed for branch-circuit and feeder protection in commercial and industrial panels. It carries a UL file designation SEAB, meaning it's UL 489 listed for the North American market. IP40 on the front keeps dust out of the enclosure cutout; the rest of the breaker is protected by the panel itself.
Ratings and derating — what the numbers mean for fit
The 15 A rating holds at 40 °C and 45 °C, then derates to 14 A at 50–60 °C, and 13 A at 65–70 °C. If your panel ambient runs hot — say inside a non-conditioned enclosure near a furnace line — you lose 2 A off the nameplate. Plan your continuous load at 80 % of the derated value per NEC. The 65 kA at 240 V is the high-end interrupting rating; at 600 Y/347 V it drops to 14 kA, so verify the available fault current at the installation point. Power loss is 6.5 W maximum — negligible for thermal budgeting in a crowded enclosure. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. No communication function, no ground-fault monitoring, no motor drive option on this variant. It's a straightforward thermal-magnetic MCCB with no add-on modules.
Panel fit — dimensions and mounting
The 3VA4195-4ED24-0AA0 measures 75.1 mm deep, 50.8 mm wide, and 129.4 mm high. That 50.8 mm width is exactly 2 inches — two standard 1-inch pole spaces on a DIN rail or panel-mount footprint. Depth at 75.1 mm (3 inches) means it clears most shallow enclosures, but check the door clearance if you're mounting a rotary handle or extended shaft.