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Siemens 5SJ4203-8HG42 10kA 2-Pole Circuit Breaker, 3A, UL 489, 480Y/277V
Siemens 5SJ4203-8HG42 10kA 2-Pole Circuit Breaker, 3A, UL 489, 480Y/277V
Siemens 5SJ4203-8HG42 10kA 2-Pole Circuit Breaker, 3A, UL 489, 480Y/277V
Siemens 5SJ4203-8HG42 10kA 2-Pole Circuit Breaker, 3A, UL 489, 480Y/277V
Siemens 5SJ4203-8HG42 10kA 2-Pole Circuit Breaker, 3A, UL 489, 480Y/277V

SIEMENS

Siemens 5SJ4203-8HG42 10kA 2-Pole Circuit Breaker, 3A, UL 489, 480Y/277V Original Brand New

Model / SKU5SJ4203-8HG42

A professional-grade 2-pole miniature circuit breaker designed for branch circuit protection. Rated at 3 Amps with a D-trip characteristic, it provides reliable protection against short circuits and overloads in demanding industrial environments, meeting strict UL 489 standards for 480Y/277V systems.

Original price was: $354.58.Current price is: $190.72.
In stockShips in 1–3 business days
  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 5SJ4203-8HG42 is a high-performance 2-pole circuit breaker designed for reliable protection in electrical circuits. With a 10kA short-circuit breaking capacity, it offers excellent safety and performance in various industrial and residential applications. This model operates at 3A and is compliant with UL 489 standards, making it a trusted choice for safe power distribution at 480Y/277V.

Benefit

  • Reliable Protection: With a 10kA short-circuit capacity, it ensures high-level protection against electrical faults.

  • UL Certified: Meets the UL 489 standard for circuit breakers, ensuring top-notch safety and quality.

  • Dual Poles: Designed with 2 poles, ideal for balanced load distribution and fault isolation.

  • Compact & Efficient: Saves space while delivering superior performance in electrical systems.

  • Durability: Built to withstand heavy-duty use in demanding environments.

Function

The Siemens 5SJ4203-8HG42 circuit breaker is engineered to disconnect the electrical circuit automatically in the event of an overload or short circuit, preventing potential damage to the circuit or connected equipment. Its 2-pole design allows for switching two conductors simultaneously, making it suitable for systems with 480Y/277V.

Ideal Uses

  • Residential electrical systems

  • Commercial and industrial power distribution

  • Backup power systems and critical infrastructure

  • Electrical panel installations

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Datasheet in PDF

Specifications

SKU / Model5SJ4203-8HG42
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breakers
design of the productMiniature circuit-breaker 5SJ4
number of poles2
tripping characteristic classD
mechanical service life (switching cycles) / typical10 000
installation environment regarding EMCSuitable for environment B (immunity to interference not applicable)
reference code / acc. to DIN 40719 extended according to IEC 204-2 / acc. to IEC 750F
overvoltage category3
degree of pollution3
type of voltage / of the operating voltageAC/DC
insulation voltage (Ui) / at AC / rated value440 V
supply voltage / at AC / rated value400 V
operating voltage-
● at AC / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum277 V
● at DC / rated value / maximum60 V
● at DC / single channel / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum60 V
● at DC / 2-channel / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum125 V
protection class IPIP20, with connected conductors, IP 40 in the handle range
switching capacity current-
● acc. to EN 60898 / rated value10 kA
● acc. to IEC 60947-2 / rated value15 kA
power loss [W] / for rated value of the current / at AC / in hot operating state / per pole1.8 W
operational current-
● at 30 °C / rated value3 A
● at 40 °C / rated value3 A
● at 45 °C / rated value2.9 A
● at 50 °C / rated value2.8 A
● at 55 °C / rated value2.7 A
● at 60 °C / rated value2.6 A
● at AC / rated value3 A
type of voltage supply / at AC / acc. to UL 489 and CSA C22.2 No. 5-02480/277
suitability for operationMechanical engineering / industry
product component / neutral conductor switchingNo
product feature / touch protectionYes
product component-
● tunnel terminals topNo
● tunnel terminals bottomNo
● combined terminal topYes
● combined terminal bottomYes
product feature-
● halogen-freeYes
● sealableYes
● silicon-freeYes
product extension / installable / supplementary devicesYes
product function / noteTerminal 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.23510 kA
connectable conductor cross-section / finely stranded / with core end processing-
tightening torque / with screw-type terminals / maximum3.5 N·m
position / of power supply cordAny
installation depth70 mm
number of modular width units2
fastening methodon standard mounting rail
mounting positionany
vibration resistance50 m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)
ambient temperature / during operation-
ambient temperature / during storage-
● minimum-40 °C
● maximum75 °C
reference code-
● acc. to DIN EN 61346-2F
● acc. to IEC 81346-2F
Miscellaneous-
Weight0.335 kg
Dimensions40.00 × 125.00 × 84.00 mm

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