SIEMENS
High-performance 1-pole miniature circuit breaker rated for 40 Amps. Engineered according to UL 489 standards, it provides robust branch circuit protection up to 277V AC with a 10kA breaking capacity.
The Siemens 5SJ4140-7HG42 is a high-performance 1-pole circuit breaker designed for reliable protection of electrical circuits in commercial and industrial applications. Rated at 40 amps with a 10kA breaking capacity, this C-curve breaker ensures safety and efficiency while meeting UL 489 standards for 277V systems. Engineered for durability, it provides excellent protection against overloads and short circuits.
1-Pole Circuit Protection: Ideal for residential, commercial, and light industrial use.
10kA Breaking Capacity: Safeguards electrical systems from high fault currents.
C Curve: Offers reliable tripping for moderate inrush currents from motors and transformers.
Rated 40A: Ensures optimal current handling and circuit safety.
UL 489 Certified: Meets strict safety and performance standards for 277V circuits.
Compact Design: Easy installation in standard Siemens distribution panels.
Reliable Protection: Prevents electrical hazards, overloads, and short circuits.
Enhanced Safety: UL 489 certification guarantees adherence to rigorous industry standards.
Long-Lasting Performance: Built to withstand frequent operation and electrical stress.
Easy Installation: Designed to fit seamlessly into Siemens panel boards.
Versatile Application: Suitable for residential, commercial, and light industrial settings.
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| SKU / Model | 5SJ4140-7HG42 |
|---|---|
| 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 | 4.8 W |
| operational current | - |
| ● at 30 °C / rated value | 40 A |
| ● at 40 °C / rated value | 40 A |
| ● at 45 °C / rated value | 38.8 A |
| ● at 50 °C / rated value | 37.6 A |
| ● at 55 °C / rated value | 36.3 A |
| ● at 60 °C / rated value | 35.2 A |
| ● at AC / rated value | 40 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 | - |
| Weight | 0.179 kg |
| Dimensions | 22.00 × 125.00 × 84.00 mm |
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