Transformer protection circuit breaker, size S00
The Siemens 3RV2811-1KD10 is a SIRIUS circuit breaker designed specifically for transformer protection, certified to UL 489 and CSA C22.2 No.5. Size S00 frame keeps the width to 45 mm, depth 97 mm, height 144 mm — fits standard distribution boards without gland-plate surprises. Breaking capacity hits 100 kA at 400 V AC (also 100 kA at 240 V AC), dropping to 42 kA at 500 V and 6 kA at 690 V AC.
M4 screws on the main contacts, Pozidriv size 2 tip, shaft diameter 5–6 mm. Clearance: 70 mm above and below, 30 mm to the side, 0 mm forward and backward — so the breaker can butt against the backplane and adjacent devices without extra spacing.
Current production — no end-of-life notice.
