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Siemens 5SY4605-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY4605-8 SENTRON MCB, D-Curve 0.5A 4-Pole 10kA

MPN5SY4605-8
Active

Siemens SENTRON miniature circuit breaker, 5SY4605-8, D-characteristic, 0.5 A rated current, 4-pole (3P+N), 10 kA breaking capacity per EN 60898, 35 kA per IEC 60947-2.

Siemens 5SY4605-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4605-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4605-8 — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated current (In), AC0.5 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
5SY4605-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
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
Touch protectionYes
5SY4605-8 — 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
5SY4605-8 — 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
5SY4605-8 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

SENTRON 5SY4605-8 — D-curve 0.5 A MCB, 4-pole

The Siemens 5SY4605-8 is a SENTRON-series miniature circuit breaker with a D tripping characteristic, rated 0.5 A at AC, across 4 poles configured as 3P+N.

Breaking capacity and derating

Rated breaking capacity is 10 kA per EN 60898 and 35 kA per IEC 60947-2 at AC; at DC the IEC 60947-2 rating drops to 15 kA. Those numbers govern where this breaker can be installed — the 10 kA EN rating covers standard domestic/commercial distribution, while the 35 kA IEC rating qualifies it for industrial panel applications with higher prospective fault current. Temperature derating is published: at 40 °C the 0.5 A rating holds at 0.48 A, at 50 °C it's 0.45 A, at 60 °C it's 0.42 A.

Panel integration

Combined terminals top and bottom; touch protection is included. Sealable for lockout/tagout compliance.

Frequently asked questions

What is the breaking capacity of 5SY4605-8?

10 kA per EN 60898, 35 kA per IEC 60947-2 at AC, and 15 kA per IEC 60947-2 at DC. The higher IEC rating qualifies it for industrial panel applications.

What is the D-curve on this MCB for?

The D characteristic (tripping between 10x and 20x In) handles high inrush loads like motors, transformers, and welding equipment without nuisance tripping on startup.

Will 5SY4605-8 drop into a panel specified around 5SY4301-7CV?

Both are SENTRON 4-pole MCBs in the same 4-MW footprint, but 5SY4301-7CV is a C-curve 1 A variant. The 5SY4605-8 is a D-curve 0.5 A — different tripping characteristic and rating. Physical fit is the same; circuit protection parameters differ.

Where can I buy 5SY4605-8?

Sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position.

MPN
5SY4605-8