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Siemens 5SY4603-5 — 4-Pole MCB (DIN Rail)

Siemens SENTRON 5SY4603-5 MCB, 4-pole 3 A, Char A, 10 kA

MPN5SY4603-5
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Siemens SENTRON miniature circuit breaker, 5SY4603-5, 4-pole (3P+N), 3 A rated current, tripping characteristic A, 10 kA breaking capacity per EN 60898, 35 kA per IEC 60947-2.

Siemens 5SY4603-5 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4603-5 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4603-5 — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
Rated frequency50/60 Hz
5SY4603-5 — Protection
ParameterValue
Tripping characteristic (trip curve)A
Rated breaking capacity (Icn), per EN 6089810 kA
Rated breaking capacity, per IEC 60947-235 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingYes
Touch protectionYes
5SY4603-5 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Fastening / mounting methodQuick assembly system
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY4603-5 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
5SY4603-5 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

The Siemens SENTRON 5SY4603-5 is a 4-pole miniature circuit breaker (3P+N) rated 3 A with tripping characteristic A, designed for 400 V AC systems. The A characteristic means it trips on short-circuit with minimal delay — suited for protecting semiconductor circuits or long cable runs where fast clearing is needed.

The 3 A rated operational current governs the continuous load — size upstream protection and cable accordingly. For DC circuits, it's rated 15 kA at 72 V per IEC 60947-2, and under UL 1077/CSA C22.2 No. 235 it carries 5 kA — useful if the panel ships to North America.

Frequently asked questions

Will 5SY4603-5 drop into a panel specified around 5SY6602-8 without rewiring?

Yes, both are 4-pole (3P+N) SENTRON breakers on the same DIN-rail footprint with the same 4 MW width (72 mm) and combined terminals. No rewiring needed — the physical fit is identical. The only difference is the tripping characteristic and current rating, so confirm those match your circuit protection requirements.

MPN
5SY4603-5