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Siemens 5SY5405-7 — Miniature Circuit Breakers (MCB)

Siemens 5SY5405-7 SENTRON MCB, 4P C-curve 0.5A 10kA

MPN5SY5405-7
Active

Siemens SENTRON 5SY5405-7 miniature circuit breaker, 4-pole, C tripping characteristic, 0.5 A rated current, 10 kA breaking capacity AC/DC, 4 MW units.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY5405-7 — Ratings
ParameterValue
Overvoltage categoryII
5SY5405-7 — Mechanical
ParameterValue
Width72 mm
Height90 mm
Depth76 mm

Product details

Breaking capacity is 10 kA per EN 60898 on AC and 10 kA per EN 60898-2 on DC up to 880 V. The DC polarity must be observed (AC supply is polarity-independent). Rated for universal current (AC/DC), so it works on both supply types without swapping the internal mechanism. Overvoltage category II and pollution degree 2 suit it for fixed-installation distribution panels in clean indoor environments.

Temperature derating — the number that matters for dense panels

At 40 °C ambient the 0.5 A rating derates to 0.48 A; at 50 °C it drops to 0.45 A; at 60 °C it is 0.42 A. In a tightly packed DIN-rail enclosure, internal temperature can reach 50–60 °C.

IP20 with connected conductors — not rated for washdown, but fine inside a sealed enclosure.

Listed as current production (active lifecycle stage). No PCN or end-of-life notice.

MPN
5SY5405-7