SIEMENS
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SIEMENS
Siemens 5SY4108-8 Miniature Circuit Breaker 1-Pole, 8A, Type D, 10kA Original Brand New
Model / SKU5SY4108-8
High-performance 1-pole Miniature Circuit Breaker (MCB) designed for superior electrical protection. Featuring an 8A rated current and a Type D tripping characteristic, it is engineered for circuits with high inrush currents, providing a 10kA breaking capacity at 230/400V.
Original price was: $37.90.$19.70Current price is: $19.70.
In stockShips in 1–3 business days
- ConditionOriginal Brand New
- Warranty12 months
- Genuine Products
- Up to 1-Year Warranty
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Description
Overview
The Siemens 5SY4 series is the gold standard for circuit protection in industrial and residential applications. The 5SY4108-8 model offers robust protection against overloads and short circuits. With a compact mounting depth of 70mm, it integrates seamlessly into standard distribution boards, ensuring maximum safety with a space-saving design.
Key Benefit
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High Reliability: Built by Siemens, ensuring long-term operational stability and compliance with international safety standards.
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Precision Tripping: The Type D curve is specifically designed to prevent nuisance tripping in motors, transformers, and magnetic valves.
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Enhanced Safety: Provides a 10kA breaking capacity, offering a high safety margin during short-circuit events.
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Easy Installation: Features ergonomic terminals and a standard DIN rail mounting system for quick setup.
Technical Function
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Short-Circuit Protection: Immediate disconnection of the power supply in the event of a high-current fault.
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Overload Protection: Thermal release mechanism to protect cables from overheating.
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Isolation Function: Can be used as a main switch for isolating specific parts of an electrical installation.
Application
This circuit breaker is perfect for:
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Electricians & electrical installers
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Builders & contractors
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Facility managers
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Homeowners upgrading electrical panels
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Industrial maintenance teams
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Specifications
| SKU / Model | 5SY4108-8 |
|---|---|
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breaker |
| number of poles | 1 |
| design of pole | 1P |
| tripping characteristic class | D |
| mechanical service life (switching cycles) / typical | 10 000 |
| overvoltage category | III |
| degree of pollution | 3 |
| type of voltage / of the operating voltage | AC |
| insulation voltage (Ui) | - |
| ● with single-phase operation / at AC / rated value | 440 V |
| ● with multi-phase operation / at AC / rated value | 440 V |
| supply voltage / with single-phase operation / at AC / rated value | 230 V |
| supply voltage | - |
| operating voltage / at DC / rated value / maximum | 72 V |
| protection class IP | IP20, with connected conductors |
| switching capacity current | - |
| ● acc. to EN 60898 / rated value | 10 kA |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 0.8 W |
| operational current | - |
| ● at 35 °C / rated value | 8 A |
| ● at 40 °C / rated value | 7.35 A |
| ● at 45 °C / rated value | 7 A |
| ● at 50 °C / rated value | 6.63 A |
| ● at 55 °C / rated value | 6.25 A |
| ● at AC / rated value | 8 A |
| suitability for operation | Mechanical engineering / industry |
| product component / neutral conductor switching | No |
| product feature / touch protection | Yes |
| product component | - |
| ● combined terminal top | Yes |
| ● combined terminal bottom | Yes |
| product feature | - |
| ● properties for main switches in accordance with EN 60204-1 | No |
| ● halogen-free | Yes |
| ● sealable | Yes |
| ● silicon-free | Yes |
| product extension / installable / supplementary devices | Yes |
| breaking capacity short-circuit current (Icn) | - |
| ● at AC / acc. to UL 1077 and CSA C22.2 No.235 | 5 kA |
| connectable conductor cross-section / solid | - |
| connectable conductor cross-section / stranded | - |
| connectable conductor cross-section / finely stranded / with core end processing | - |
| tightening torque [lbf·in] / with screw-type terminals | - |
| tightening torque / with screw-type terminals | - |
| position / of power supply cord | Any |
| installation depth | 70 mm |
| number of modular width units | 1 |
| fastening method | Quick assembly system |
| mounting position | any |
| influence of the surrounding temperature | max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C |
| vibration resistance / acc. to IEC 60068-2-6 | ±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz |
| ambient temperature / during operation | - |
| ambient temperature / during storage | - |
| ● minimum | -40 °C |
| ● maximum | 75 °C |
| number of test cycles / for environmental testing / acc. to IEC 60068-2-30 | 28 |
| reference code | - |
| ● acc. to DIN EN 61346-2 | F |
| ● acc. to IEC 81346-2 | F |
| Weight | 0.155 kg |
| Dimensions | 21.00 × 93.00 × 83.00 mm |
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