SIEMENS
High-performance, 1-pole Miniature Circuit Breaker (MCB) rated at 20A and 240V. Designed specifically for branch circuit protection, it features a 14kA interrupting capacity and C-Trip characteristic, fully compliant with UL 489 standards.
The Siemens 5SJ4120-7HG41 is a specialized miniature circuit breaker engineered for the North American market and global industrial applications. As part of the Siemens SENTRON family, this unit provides reliable protection for electrical installations against overloads and short circuits.
With a mounting depth of 70 mm and a compact 1-pole design, it is ideal for space-constrained panels requiring high breaking capacity. Its compliance with UL 489 ensures it can be used as a primary branch protection device in various industrial and commercial environments.
Certified Safety: Fully meets UL 489 and CSA C22.2 standards for branch circuit protection.
Space-Efficient: The 70 mm depth allows for seamless integration into standard control cabinets.
Versatile Application: Features a C-Trip curve, making it perfect for inductive loads and general lighting/power circuits.
High Interrupting Capacity: Capable of handling up to 14kA at 240V, providing superior protection during fault conditions.
Pole Configuration: 1-Pole
Rated Current: 20 Amps
Voltage Rating: 240 V AC
Trip Characteristic: Type C (5 to 10 times rated current)
Interrupting Rating: 14 kA
Mounting: DIN Rail (D=70 mm)
Standards: UL 489, IEC 60947-2
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| SKU / Model | 5SJ4120-7HG41 |
|---|---|
| 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 | 240 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 | 240 |
| 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 | 14 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 |
| Test Certificates | other |
| Special Test Certificate | Miscellaneous |
| Weight | 0.171 kg |
| Dimensions | 23.00 × 114.00 × 84.00 mm |
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