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Siemens 5SY4310-8 — 3-Pole MCB (DIN Rail)

Siemens 5SY4310-8 SENTRON MCB, 3-Pole D-Curve, 10A

MPN5SY4310-8
Active

Siemens SENTRON 5SY4310-8, 3-pole miniature circuit breaker, D tripping characteristic, 10 A, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 3 modular width units.

$26.75Ref. price · indicative, final on quote
Siemens 5SY4310-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4310-8 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY4310-8 — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-220 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Pollution degree3
5SY4310-8 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)0.9 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY4310-8 — Mechanical
ParameterValue
Modular width units3
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
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY4310-8 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

Panel fit and environmental range

The quick-assembly system snaps onto the rail without tools. IP20 with conductors connected — the busbar area is touch-safe once wired.

DC capability and dual-standard certification

This covers 48 V control power and 60 V battery banks common in industrial DC bus distribution. The same breaker works AC or DC — no need to stock separate DC-rated units for mixed panels. Halogen-free and silicon-free construction — no outgassing concerns in sealed or clean-room panels.

Frequently asked questions

What is the full specification of Siemens 5SY4310-8 MCB?

Design engineers need exact specs (voltage, breaking capacity, dimensions) to validate fit in a panel.

Is Siemens 5SY4310-8 obsolete or still in production?

Buyers and maintenance techs need lifecycle status to plan procurement or find a replacement.

What is the price and lead time for 5SY4310-8 from distributors?

Sourcing buyers must compare pricing and availability to fill a BOM line quickly.

Can I use Siemens 5SY4310-8 for DC applications?

Technicians need to know if the MCB is rated for DC to avoid misapplication in control circuits.

What equivalent or replacement exists for Siemens 5SY4310-8?

Brokers and maintenance teams need cross-reference options when the exact part is unavailable or obsolete.

What tools or accessories are compatible with 5SY4310-8 for DIN rail mounting?

Installers need to ensure proper fit with existing panels and accessories (busbars, enclosures).

MPN
5SY4310-8