Siemens 5SY4120-6 Miniature Circuit Breaker 230/400V, 10kA, 1-Pole, B Curve, 20A Original Brand New
$5.17
High-performance 1-pole Miniature Circuit Breaker (MCB) designed for superior electrical protection. Featuring a 20A rated current and Type B tripping characteristic, it provides reliable short-circuit and overload protection for 230/400V systems with a 10kA breaking capacity.
Availability: In stock
Overview
The Siemens 5SY4120-6 is a high-performance miniature circuit breaker (MCB) designed for reliable protection of electrical circuits. Rated for 230/400V with a breaking capacity of 10kA, this 1-pole, B-curve MCB ensures safe operation and prevents overcurrent damage in residential, commercial, and industrial electrical systems. Its compact design (D=70mm) makes it perfect for modern electrical panels with space constraints.
Key Features & Benefit
Reliable Protection:
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Prevents overloads and short circuits with a 10kA breaking capacity.
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B-curve tripping characteristics ideal for residential and light commercial use.
Compact & Efficient Design:
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Slim 1-pole configuration (D=70mm) fits easily in standard distribution boards.
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Space-saving design without compromising performance.
High Compatibility:
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Operates seamlessly at 230/400V, supporting single-phase and multiphase systems.
Durable & Safe:
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Siemens quality ensures long-lasting performance.
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Meets international safety standards for electrical protection.
Function
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Tripping Characteristic B: Optimized for the protection of generators, persons, and very long cables.
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10kA Breaking Capacity: High switching capacity suitable for most standard industrial distribution tasks.
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1-Pole Configuration: Designed for single-phase circuit protection.
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Compact Dimensions: Standard 70mm depth for seamless integration into Siemens SENTRON portfolios.
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| Weight | 0.165 kg |
|---|---|
| Dimensions | 21.00 × 93.00 × 83.00 mm |
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breaker |
| design of the product | For railway applications |
| number of poles | 1 |
| design of pole | 1P |
| tripping characteristic class | B |
| 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 |
| energy limitation class | 3 |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 2.2 W |
| operational current | – |
| ● at 35 °C / rated value | 20 A |
| ● at 40 °C / rated value | 18.38 A |
| ● at 45 °C / rated value | 17.5 A |
| ● at 50 °C / rated value | 16.58 A |
| ● at 55 °C / rated value | 15.62 A |
| ● at 60 °C / rated value | 14.58 A |
| ● at AC / rated value | 20 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 | 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 |
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