Skip to main content
Siemens 5SY7310-8MA — 3-Pole MCB (DIN Rail)

Siemens 5SY7310-8MA SENTRON MCB, 10A D-curve, 3-pole, 25kA

MPN5SY7310-8MA

Siemens SENTRON 5SY7310-8MA, miniature circuit breaker, 3-pole, 10 A, D-characteristic, 400 V AC, 25 kA per IEC 60947-2, magnetic-only trip.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7310-8MA — Identification
ParameterValue
Design / model code5SY7MA
Brand nameSENTRON
Number of poles3
Suitability for operationIndustry
5SY7310-8MA — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per IEC 60947-225 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
5SY7310-8MA — Electrical
ParameterValue
Rated current (AC)400 V
Rated voltage (AC, multi-phase)440 V
Rated frequency50/60 Hz
5SY7310-8MA — Mechanical
ParameterValue
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Combined terminal, topYes
Combined terminal, bottomYes
SealableYes
5SY7310-8MA — 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

Three poles, 3 width units (54 mm), and it snaps onto a DIN rail — standard panel integration.

The D-curve (tripping characteristic D) means the magnetic trip fires at 10–20× rated current — so for this 10 A breaker, instant trip between 100 A and 200 A. That's the right window for motor circuits or other inductive loads that draw a short high surge on energization. On a 400 V industrial panel with a transformer upstream, that's a solid safety margin. The magnetic-only design (no bimetal) also means no thermal derating from ambient heat — it's rated for -35 to +70 °C ambient, and the trip point stays consistent across that range.

Terminal and wiring detail

Combined terminals top and bottom, so you can feed through or loop out without extra connectors. Sealable, halogen-free, silicon-free — relevant for food processing or clean-room panels where outgassing matters.

Frequently asked questions

What is 5SY7310-8MA's listed depth?

The overall depth is 76 mm, with an installation depth of 70 mm behind the panel face.

What wire sizes does the 5SY7310-8MA accept?

Solid or stranded copper from 0.75 mm² up to 35 mm², terminated under screw terminals torqued to 2.5–3.5 N·m.

MPN
5SY7310-8MA