Siemens 5SY6601-7 — 4-Pole C-Curve MCB, 1 A, Dual-Rated Breaking Capacity
The Siemens SENTRON 5SY6601-7 is a 4-pole (3P+N) miniature circuit breaker with a C tripping characteristic, rated 1 A at AC per IEC/EN 60898-1 and IEC/EN 60947-2, with UL1077 recognition. At DC, it's rated 15 kA per IEC 60947-2, which covers battery-backed control circuits and UPS distribution. Temperature derating is published per the spec table: at 40 °C the rating drops to 0.95 A, at 50 °C to 0.9 A, and at 55 °C to 0.88 A. If the panel ambient hits 55 °C, the breaker will hold 0.88 A continuous without nuisance tripping — that's the number to use for load budgeting, not the 1 A label.
Standards & Compliance — What Each Rating Certifies
The 5SY6601-7 is certified to IEC/EN 60898-1 (the household/miniature breaker standard for overcurrent protection) and IEC/EN 60947-2 (the industrial breaker standard for isolation and higher fault levels), plus UL1077 for supplementary protection in North American panels. Touch protection is integrated on the terminals (IP20 with conductors connected), and the unit is sealable — the enclosure lid can be locked to prevent tampering. Halogen-free and silicon-free construction matter for high-reliability environments — no corrosive off-gassing during a fault, and no silicone outgassing to contaminate optics or contacts in sealed enclosures.
Panel Fit & Integration — DIN Rail, 4 MW, 76 mm Depth
Dimensions: 72 mm wide (4 MW), 90 mm tall, 76 mm deep. Installation depth is 70 mm — the extra 6 mm accounts for the terminal projection and arc-chamber clearance behind the DIN rail. Combined terminal top and bottom accept both busbar and conductor — no separate feed-through terminal needed.