Siemens 5SJ4120-7HG42 20A 1-Pole Circuit Breaker, 10kA, UL 489, 277V Original Brand New
$54.22
High-performance Siemens 5SJ4120-7HG42 Miniature Circuit Breaker (MCB). Rated for 20A, 1-Pole, Type C characteristic, 10kA interrupting capacity, and UL 489 compliant for up to 277V AC applications.
Availability: In stock
Overview
The Siemens 5SJ4120-7HG42 is a high-quality, reliable 1-pole circuit breaker designed to provide superior protection for your electrical systems. With a 10kA short-circuit breaking capacity and 20A current rating, this breaker is UL 489 approved and compatible with 277V electrical installations. Whether for commercial or residential use, the Siemens 5SJ4120-7HG42 ensures efficient operation and safety by interrupting electrical faults to prevent damage to equipment and minimize fire risks.
Benefit
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High Breaking Capacity: With a 10kA breaking capacity, this circuit breaker offers enhanced protection against electrical faults, ensuring that your system remains safe even under high fault conditions.
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Compact & Reliable: Designed as a 1-pole breaker, the Siemens 5SJ4120-7HG42 is space-efficient and ideal for installations with limited panel space.
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UL 489 Certification: UL 489 compliance ensures the circuit breaker meets rigorous safety and reliability standards for use in industrial and commercial applications.
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Wide Voltage Range: Suitable for installations up to 277V, providing flexibility across different system types.
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Easy Installation: The Siemens 5SJ4120-7HG42 is easy to install and maintain, making it an ideal choice for professional electricians and DIY enthusiasts alike.
Product Features
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Type: 1-Pole Circuit Breaker
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Current Rating: 20A
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Short Circuit Breaking Capacity: 10kA
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Voltage Rating: 277V
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Compliant with UL 489: Meets the highest safety and performance standards
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Application: Ideal for residential, commercial, and industrial applications
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| Weight | 0.176 kg |
|---|---|
| Dimensions | 22.00 × 125.00 × 84.00 mm |
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breakers |
| design of the product | Miniature circuit-breaker 5SJ4 |
| number of poles | 1 |
| tripping characteristic class | C |
| mechanical service life (switching cycles) / typical | 10 000 |
| installation environment regarding EMC | Suitable for environment B (immunity to interference not applicable) |
| reference code / acc. to DIN 40719 extended according to IEC 204-2 / acc. to IEC 750 | F |
| overvoltage category | 3 |
| degree of pollution | 3 |
| type of voltage / of the operating voltage | AC/DC |
| insulation voltage (Ui) / at AC / rated value | 440 V |
| supply voltage / at AC / rated value | 400 V |
| operating voltage | – |
| ● at AC / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum | 277 V |
| ● at DC / rated value / maximum | 60 V |
| ● at DC / single channel / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum | 60 V |
| ● at DC / 2-channel / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum | 125 V |
| protection class IP | IP20, with connected conductors, IP 40 in the handle range |
| switching capacity current | – |
| ● acc. to EN 60898 / rated value | 10 kA |
| ● acc. to IEC 60947-2 / rated value | 15 kA |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 2.4 W |
| operational current | – |
| ● at 30 °C / rated value | 20 A |
| ● at 40 °C / rated value | 20 A |
| ● at 45 °C / rated value | 19.4 A |
| ● at 50 °C / rated value | 18.8 A |
| ● at 55 °C / rated value | 18.1 A |
| ● at 60 °C / rated value | 17.6 A |
| ● at AC / rated value | 20 A |
| type of voltage supply / at AC / acc. to UL 489 and CSA C22.2 No. 5-02 | 480/277 |
| suitability for operation | Mechanical engineering / industry |
| product component / neutral conductor switching | No |
| product feature / touch protection | Yes |
| product component | – |
| ● tunnel terminals top | No |
| ● tunnel terminals bottom | No |
| ● combined terminal top | Yes |
| ● combined terminal bottom | Yes |
| product feature | – |
| ● halogen-free | Yes |
| ● sealable | Yes |
| ● silicon-free | Yes |
| product extension / installable / supplementary devices | Yes |
| product function / note | Terminal tightening torque for Cu, 60/75°C; 3.5Nm/31lb.in |
| breaking capacity short-circuit current (Icn) / at AC / acc. to UL 1077 and CSA C22.2 No.235 | 10 kA |
| connectable conductor cross-section / finely stranded / with core end processing | – |
| tightening torque / with screw-type terminals / maximum | 3.5 N·m |
| position / of power supply cord | Any |
| installation depth | 70 mm |
| number of modular width units | 1 |
| fastening method | on standard mounting rail |
| mounting position | any |
| vibration resistance | 50 m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec) |
| ambient temperature / during operation | – |
| ambient temperature / during storage | – |
| ● minimum | -40 °C |
| ● maximum | 75 °C |
| reference code | – |
| ● acc. to DIN EN 61346-2 | F |
| ● acc. to IEC 81346-2 | F |
| Miscellaneous | – |
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