Siemens 5SY4208-8 Miniature Circuit Breaker 2-Pole, 8A, D-Curve, 10kA, 400V Original Brand New
$107.54
High-performance 2-pole miniature circuit breaker (MCB) from the Sentron series. Designed for 400V systems with a 10kA breaking capacity and an 8A rated current, it features a Type D tripping characteristic for superior protection in circuits with high inductive loads.
Availability: In stock
Overview
The Siemens 5SY4208-8 Miniature Circuit Breaker (MCB) is a high-performance electrical protection device designed for reliable overcurrent and short-circuit protection. Featuring a 2-pole configuration, D-curve tripping characteristic, and 10kA breaking capacity, this MCB is ideal for industrial and commercial electrical installations that demand robust safety and durability.
Engineered to Siemens’ high-quality standards, this circuit breaker ensures safe operation of electrical circuits operating up to 400V, with a compact 70 mm depth for efficient panel installation.
Benefit
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High breaking capacity (10kA) ensures superior protection against short circuits
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D-curve tripping characteristic suitable for circuits with high inrush currents
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2-pole design provides enhanced safety and isolation
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Compact size (70 mm depth) allows space-saving installation
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Siemens quality and reliability for long-term performance
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Ideal for industrial and commercial applications
Function
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Protects electrical circuits from overload and short-circuit conditions
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Ensures safe disconnection during fault conditions
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Supports stable operation of high-inductive loads such as motors and transformers
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Complies with international electrical safety standards
Technical Specification
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Brand: Siemens
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Product Number: 5SY4208-8
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Rated Voltage: 400 V
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Rated Current: 8 A
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Poles: 2-Pole
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Tripping Curve: D
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Breaking Capacity: 10 kA
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Installation Depth: 70 mm
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Product Type: Miniature Circuit Breaker (MCB)
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| Weight | 0.309 kg |
|---|---|
| Dimensions | 40.00 × 92.00 × 84.00 mm |
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breaker |
| design of the product | For railway applications |
| number of poles | 2 |
| design of pole | 2P |
| 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 | – |
| 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 60 °C / rated value | 5.83 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 |
| 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 | 2 |
| 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 |
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