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Siemens 5SY4305-5 — 3-Pole MCB (DIN Rail)

Siemens 5SY4305-5 SENTRON MCB, 0.5 A, 3-Pole, Char A

MPN5SY4305-5
Active

Siemens SENTRON 5SY4 series, miniature circuit breaker, 3-pole, 0.5 A rated current, tripping characteristic A, 400 V AC, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity.

Siemens 5SY4305-5 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4305-5 — Identification
ParameterValue
Design / model code5SY4
Brand nameSENTRON
Number of poles3
Suitability for operationMechanical engineering / industry
5SY4305-5 — Protection
ParameterValue
Tripping characteristic (curve)A
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-235 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Pollution degree3
5SY4305-5 — Electrical
ParameterValue
Rated current (AC)400 V
Rated voltage (AC, multi-phase)440 V
Rated frequency50/60 Hz
5SY4305-5 — Mechanical
ParameterValue
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
SealableYes
5SY4305-5 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

Product details

Siemens 5SY4305-5 — 0.5 A SENTRON MCB, Characteristic A, 3-Pole

The Siemens 5SY4305-5 is a 3-pole miniature circuit breaker from the SENTRON 5SY4 series, rated at 0.5 A with tripping characteristic A. It is designed for 400 V AC systems and provides a breaking capacity of 10 kA per EN 60898 and 35 kA per IEC 60947-2, with a DC rating of 15 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235. The IP20 rating applies with connected conductors; the enclosure is sealable and halogen- and silicon-free, suited for controlled industrial environments.

Integration & Compliance

Compliance documentation available includes the EN 60898 and IEC 60947-2 certifications for breaking capacity, plus UL 1077 and CSA C22.2 No.235 listing for North American acceptance. The part is halogen-free and silicon-free, supporting RoHS/REACH alignment typical of Siemens SENTRON components.

Frequently asked questions

What is the breaking capacity of 5SY4305-5?

The 5SY4305-5 has a breaking capacity of 10 kA per EN 60898, 35 kA per IEC 60947-2 at 400 V AC, 15 kA per IEC 60947-2 at DC, and 5 kA per UL 1077 / CSA C22.2 No.235.

What does tripping characteristic A mean for this MCB?

Characteristic A means the 5SY4305-5 trips instantaneously at 2–3× rated current (0.5 A), providing very fast short-circuit protection for sensitive loads like semiconductor circuits or long cable runs where low let-through energy is required.

Where can I buy 5SY4305-5 and get current pricing?

The 5SY4305-5 is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability confirmation.

What compliance certifications does 5SY4305-5 carry?

The 5SY4305-5 is certified to EN 60898, IEC 60947-2, UL 1077, and CSA C22.2 No.235. It is halogen-free and silicon-free, supporting RoHS/REACH compliance.

MPN
5SY4305-5