SIEMENS
High-performance 3-pole miniature circuit breaker (MCB) designed for branch circuit protection. Rated at 6A with a C-trip characteristic, it provides reliable protection for 480Y/277V systems and is fully compliant with UL 489 standards.
The Siemens 5SJ4306-7HG42 belongs to the rugged 5SJ4 series, specifically engineered for the North American market. This circuit breaker is designed for industrial applications requiring UL 489 branch circuit protection, ensuring the highest safety standards for electrical installations.
With a 10kA interrupting capacity, it is ideal for protecting sensitive equipment against overloads and short circuits in complex electrical environments.
Universal Compliance: Certified according to UL 489, making it suitable for branch circuit protection in the US and Canada.
Compact Design: Space-saving 3-pole construction allows for efficient cabinet layout.
Enhanced Safety: Provides reliable disconnection under fault conditions with a high 10kA breaking capacity.
Easy Installation: Features Siemens' signature terminal design for secure and fast wiring.
Overload Protection: Safely interrupts power during sustained overcurrent.
Short-Circuit Protection: Instantaneous tripping to prevent damage during electrical faults.
Branch Circuit Disconnect: Serves as a certified disconnecting means for downstream loads.
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| SKU / Model | 5SJ4306-7HG42 |
|---|---|
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breakers |
| design of the product | Miniature circuit-breaker 5SJ4 |
| number of poles | 3 |
| 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 | 2.7 W |
| operational current | - |
| ● at 30 °C / rated value | 6 A |
| ● at 40 °C / rated value | 6 A |
| ● at 45 °C / rated value | 5.8 A |
| ● at 50 °C / rated value | 5.7 A |
| ● at 55 °C / rated value | 5.6 A |
| ● at 60 °C / rated value | 5.4 A |
| ● at AC / rated value | 6 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 | 3 |
| 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 | 0.495 kg |
| Dimensions | 57.00 × 125.00 × 84.00 mm |
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