Siemens 5SY4203-8 Miniature Circuit Breaker 2-Pole 3A, 400V, 10kA, Type D Original Brand New
$78.52
High-performance miniature circuit breaker designed for industrial and commercial protection. Featuring a 3A current rating, 2-pole configuration, and Type D tripping characteristic, it provides reliable short-circuit and overload protection with a 10kA breaking capacity.
Availability: In stock
Overview
The Siemens 5SY4203-8 Miniature Circuit Breaker is a high-performance electrical protection device designed for residential, commercial, and industrial applications. Rated at 400 V with a breaking capacity of 10kA, this 2-pole Type D breaker ensures maximum protection for sensitive and inductive loads. Compact yet robust, with a 70 mm D-width, it is perfect for installation in standard distribution boards.
Engineered by Siemens, this miniature circuit breaker guarantees reliable overcurrent and short-circuit protection, providing safety and efficiency in your electrical system.
Features
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Rated voltage: 400 V
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Breaking capacity: 10 kA
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Poles: 2-pole (D)
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Rated current: 3 A
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Width: 70 mm (D-type)
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Compact and durable design
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Easy to install in standard DIN rail systems
Benefit
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Protects electrical circuits from overload and short circuits
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Enhances safety for residential and industrial installations
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Compact size saves space in distribution panels
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Reliable Siemens quality ensures long-term durability
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Quick and easy installation
Function
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Tripping Characteristic D: Ideal for circuits with high inductive loads and peak starting currents (e.g., transformers, motors, and solenoid valves).
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2-Pole Design: Simultaneous disconnection of two phases for enhanced safety.
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Thermal-Magnetic Trip: Provides dual protection against both sustained overloads and instantaneous short circuits.
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Voltage Rating: Optimized for 400 V AC systems.
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| Weight | 0.320 kg |
|---|---|
| Dimensions | 40.00 × 92.00 × 84.00 mm |
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breaker |
| 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 / 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 | – |
| ● at DC / acc. to IEC 60947-2 / rated value | 15 kA |
| ● acc. to EN 60898 / rated value | 10 kA |
| ● acc. to IEC 60947-2 / rated value | 35 kA |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 1.2 W |
| operational current | – |
| ● at 35 °C / rated value | 3 A |
| ● at 40 °C / rated value | 2.82 A |
| ● at 45 °C / rated value | 2.72 A |
| ● at 50 °C / rated value | 2.62 A |
| ● at 55 °C / rated value | 2.52 A |
| ● at 60 °C / rated value | 2.41 A |
| ● at AC / rated value | 3 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 | Yes |
| ● 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 | – |
| AWG number / as coded connectable conductor cross section | – |
| 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 | 6 |
| reference code | – |
| ● acc. to DIN EN 61346-2 | F |
| ● acc. to IEC 81346-2 | F |
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