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Siemens 5SJ4308-7HG42 Miniature Circuit Breaker, 10 kA, 3-Pole, C, 8 A, UL 489-480Y/277V
Siemens 5SJ4308-7HG42 Miniature Circuit Breaker, 10 kA, 3-Pole, C, 8 A, UL 489-480Y/277V
Siemens 5SJ4308-7HG42 Miniature Circuit Breaker, 10 kA, 3-Pole, C, 8 A, UL 489-480Y/277V

SIEMENS

Siemens 5SJ4308-7HG42 Miniature Circuit Breaker, 10 kA, 3-Pole, C, 8 A, UL 489-480Y/277V Original Brand New

Model / SKU5SJ4308-7HG42

High-performance 3-pole miniature circuit breaker designed for industrial protection. Rated at 8 Amps with a Type C tripping characteristic, this unit is fully compliant with UL 489 standards for 480Y/277V systems, ensuring reliable branch circuit protection in demanding environments.

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 5SJ4308-7HG42 is a high-performance miniature circuit breaker designed for reliable protection in both commercial and residential electrical systems. With a robust 10 kA breaking capacity, it ensures the safe operation of your electrical installations. The 3-pole configuration and C-characteristic trip curve offer optimal protection against overloads and short circuits in demanding environments. Compliant with UL 489 standards, this breaker is ideal for installations rated at 480Y/277V.

Benefit

  • Superior Protection: With a 10 kA breaking capacity, the Siemens 5SJ4308-7HG42 ensures that your electrical circuits are protected from overloads and short circuits, minimizing potential risks to your system.

  • High Quality & Durability: Manufactured by Siemens, a global leader in electrical products, ensuring long-lasting reliability and performance.

  • Efficient & Compact Design: The miniature design allows for efficient space utilization in electrical panels while maintaining high performance.

  • UL 489 Compliant: Certified to meet UL 489 standards, providing peace of mind for safety-conscious professionals and businesses.

  • Versatile Use: Suitable for a wide range of applications, including industrial, commercial, and residential electrical systems.

Function

  • Overload Protection: Automatically trips in case of sustained overcurrent, ensuring your electrical equipment remains safe from damage.

  • Short Circuit Protection: Quickly disconnects the circuit in the event of a short circuit to prevent further damage to electrical systems.

  • C-Characteristic: Provides a moderate trip response to overloads, ideal for circuits with high inrush currents such as motors and transformers.

  • 3-Pole Configuration: Protects three-phase electrical systems, commonly used in industrial environments for heavy-duty equipment.

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Datasheet in PDF

Specifications

SKU / Model5SJ4308-7HG42
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 pole2.6 W
operational current-
● at 30 °C / rated value8 A
● at 40 °C / rated value8 A
● at 45 °C / rated value7.8 A
● at 50 °C / rated value7.6 A
● at 55 °C / rated value7.4 A
● at 60 °C / rated value7.2 A
● at AC / rated value8 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-
Weight0.494 kg
Dimensions57.00 × 125.00 × 84.00 mm

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