The 5SY4310-8CV is a 3-pole miniature circuit breaker with a D tripping characteristic, rated 10 A at 35 °C and built to IEC / EN 60947-2. At 40 °C the continuous rating derates to 9.27 A, at 50 °C to 8.5 A, and at 55 °C to 8.04 A — the thermal-magnetic trip responds to ambient heat, so a panel running hot needs a bigger breaker or a lower load.
5SY4310-8CV MCB, 3-pole D-curve 10 A, 15 kA IEC, 3 MW
MPN5SY4310-8CV
Siemens 5SY4310-8CV, 3-pole miniature circuit breaker, D tripping characteristic, rated current 10 A at 35 °C, breaking capacity 15 kA per IEC 60947-2, 3 modular width units.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | D |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated current (AC) | 10 A |
| Rated voltage (AC, multi-phase) | 440 V |
| Neutral conductor switching | No |
| Parameter | Value |
|---|---|
| Modular width units | 3 |
| Mounting position | any |
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Terminal tightening torque, max. | 75 °C |
| Terminal tightening torque, min. | -40 °C |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Fastening method | Quick assembly system |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
| Influence of surrounding temperature | max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C |
Product details
Frequently asked questions
How do I get current pricing and availability for 5SY4310-8CV?
Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels.
What is 5SY4310-8CV's listed depth (76 mm) on this component line?
The depth is 76 mm, with an installation depth of 70 mm. The extra 6 mm is the front projection of the toggle and terminal covers.
What is 5SY4310-8CV's listed width (54 mm) on this component line?
The width is 54 mm, which corresponds to 3 modular width units on a standard DIN rail.
Will 5SY4310-8CV drop into a panel that was specified around 5SY4301-7CV without rewiring?
The 5SY4301-7CV is a 1-pole version; the 5SY4310-8CV is 3-pole. They share the same 54 mm width per pole, but the 3-pole unit occupies 3 MW instead of 1 MW. The footprint is different — it will not drop into a single-pole slot without panel rework.
What compliance documentation does this brand provide for 5SY4310-8CV (RoHS, REACH, UL, IEC)?
The breaker is certified to IEC / EN 60947-2. Halogen-free and silicon-free construction is confirmed. The evidence does not list RoHS, REACH, or UL marks; verify with the manufacturer for those specific declarations.
MPN
5SY4310-8CV