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Siemens 5SJ4301-7HG42 UL 489 Circuit Breaker 3 Pole, 1A, C Curve, 10kA, 480Y/277V
Siemens 5SJ4301-7HG42 UL 489 Circuit Breaker 3 Pole, 1A, C Curve, 10kA, 480Y/277V
Siemens 5SJ4301-7HG42 UL 489 Circuit Breaker 3 Pole, 1A, C Curve, 10kA, 480Y/277V
Siemens 5SJ4301-7HG42 UL 489 Circuit Breaker 3 Pole, 1A, C Curve, 10kA, 480Y/277V
Siemens 5SJ4301-7HG42 UL 489 Circuit Breaker 3 Pole, 1A, C Curve, 10kA, 480Y/277V

SIEMENS

Siemens 5SJ4301-7HG42 UL 489 Circuit Breaker 3 Pole, 1A, C Curve, 10kA, 480Y/277V Original Brand New

Model / SKU5SJ4301-7HG42

High-performance 3-pole miniature circuit breaker (MCB) designed for branch circuit protection. Featuring a 1A current rating and a Type C trip characteristic, it provides reliable protection for electrical installations according to UL 489 standards at 480Y/277V.

Original price was: $433.62.Current price is: $233.23.
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  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 5SJ4301-7HG42 Circuit Breaker is a high-performance, UL 489–certified miniature circuit breaker designed for reliable protection of electrical systems operating at 480Y/277V. With a 3-pole configuration, C-curve tripping characteristic, and 1 ampere rating, this breaker ensures precise protection against overloads and short circuits in commercial and industrial applications.

Engineered by Siemens for durability and compliance, this circuit breaker delivers a 10kA interrupting capacity, making it suitable for demanding power distribution environments.

Benefit

  • High Safety Standard – Certified according to UL 489, ensuring compliance with North American electrical codes

  • Reliable Protection – C-curve characteristic provides optimal response to moderate inrush currents

  • Strong Interrupting Capacity – 10kA rating ensures effective short-circuit protection

  • Industrial Grade Quality – Built by Siemens for long-term reliability

  • Efficient Power Distribution – Ideal for commercial and industrial electrical panels

Function

  • Protects electrical circuits from overload and short-circuit faults

  • Maintains system stability in 480Y/277V power networks

  • Enables safe isolation of circuits for maintenance and servicing

  • Ensures compliance with UL standards in regulated installations

Technical Specification

  • Product Number: 5SJ4301-7HG42

  • Manufacturer: Siemens

  • Breaker Type: Miniature Circuit Breaker (MCB)

  • Number of Poles: 3

  • Current Rating: 1A

  • Tripping Curve: C Curve

  • Interrupting Capacity: 10kA

  • Rated Voltage: 480Y/277V

  • Standard: UL 489

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Datasheet in PDF

Specifications

SKU / Model5SJ4301-7HG42
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breakers
design of the productMiniature circuit-breaker 5SJ4
number of poles3
tripping characteristic classC
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 pole1.7 W
operational current-
● at 30 °C / rated value1 A
● at 40 °C / rated value1 A
● at 45 °C / rated value0.97 A
● at 50 °C / rated value0.9 A
● at 55 °C / rated value0.9 A
● at 60 °C / rated value0.88 A
● at AC / rated value1 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 units3
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-
Weight0.500 kg
Dimensions57.00 × 125.00 × 84.00 mm

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