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Siemens 5SY8605-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY8605-8 SENTRON MCB, D Curve, 4P, 70 kA

MPN5SY8605-8
Active

Siemens SENTRON 5SY8605-8 miniature circuit breaker, D characteristic, 4-pole (3P+N), 70 kA interrupting capacity per IEC 60947-2, 5 kA per UL 1077, 230/400 V AC, IP20.

Siemens 5SY8605-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY8605-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY8605-8 — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated voltage, AC (multi-phase)440 V
5SY8605-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY8605-8 — 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
5SY8605-8 — 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
5SY8605-8 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)0.8 W

Product details

The Siemens 5SY8605-8 is a SENTRON miniature circuit breaker with a D tripping characteristic, 4 poles (3P+N), rated for AC operation at 230/400 V and 50/60 Hz. It interrupts fault currents up to 70 kA per IEC 60947-2 and 15 kA at DC per the same standard; under UL 1077 the interrupting rating is 5 kA.

Top and bottom combined terminals simplify busbar and outgoing wiring. Neutral conductor is switched internally (3P+N design).

Rated for ambient temperatures from -40 °C to 75 °C, with humidity limits of 95% at 55 °C, 55% at 70 °C, and 35% at 75 °C. Pollution degree 3, overvoltage category III. Halogen-free and silicon-free construction. Sealable for tamper-evident installations. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Frequently asked questions

What is the interrupting rating of 5SY8605-8?

70 kA per IEC 60947-2 at 400 V AC, 15 kA at DC per the same standard, and 5 kA per UL 1077.

What tripping characteristic does 5SY8605-8 have?

D curve — designed for high-inrush loads like motors, transformers, and discharge lighting where a B or C curve would trip on startup.

What is the depth of 5SY8605-8?

76 mm overall depth, with an installation depth of 70 mm.

What compliance documentation does Siemens provide for 5SY8605-8?

The breaker is certified to IEC/EN 60947-2 and UL 1077. It is halogen-free and silicon-free, and rated for pollution degree 3, overvoltage category III.

Where can I buy 5SY8605-8?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
5SY8605-8