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Siemens 5SJ4320-8HG42 Miniature Circuit Breaker 3-Pole, 20A, 10kA, D-Curve, UL 489 Rated
Siemens 5SJ4320-8HG42 Miniature Circuit Breaker 3-Pole, 20A, 10kA, D-Curve, UL 489 Rated
Siemens 5SJ4320-8HG42 Miniature Circuit Breaker 3-Pole, 20A, 10kA, D-Curve, UL 489 Rated
Siemens 5SJ4320-8HG42 Miniature Circuit Breaker 3-Pole, 20A, 10kA, D-Curve, UL 489 Rated
Siemens 5SJ4320-8HG42 Miniature Circuit Breaker 3-Pole, 20A, 10kA, D-Curve, UL 489 Rated

SIEMENS

Siemens 5SJ4320-8HG42 Miniature Circuit Breaker 3-Pole, 20A, 10kA, D-Curve, UL 489 Rated Original Brand New

Model / SKU5SJ4320-8HG42

High-performance, 3-pole miniature circuit breaker designed for industrial applications. Featuring a 20A current rating and D-curve tripping characteristic, this unit provides robust protection against short circuits and overloads in systems up to 480Y/277V AC according to UL 489 standards.

Original price was: $445.80.Current price is: $239.79.
In stockShips in 1–3 business days
  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 5SJ4 series is engineered specifically for the North American market, meeting the stringent UL 489 (Branch Circuit Protection) requirements. The 5SJ4320-8HG42 model is a reliable solution for protecting electrical installations in functional buildings and industrial plants. With a 10kA interrupting capacity, it ensures safety and longevity for your electrical infrastructure.

Key Benefit

  • Global Compliance: Fully compliant with UL 489 and CSA C22.2, making it suitable for export and domestic use in North America.

  • Space-Efficient: Compact 3-pole design allows for high-density installation in control cabinets.

  • High Durability: Built with Siemens’ world-class engineering to withstand demanding industrial environments.

  • Easy Installation: Standardized mounting and terminal design for quick integration.

Function & Application

  • Branch Circuit Protection: Safely protects electrical loads and wiring from overcurrent.

  • D-Curve Characteristic: Optimized for inductive loads with high inrush currents, such as motors, transformers, and solenoid valves.

  • Voltage Versatility: Rated for 480Y/277V AC, ideal for heavy-duty industrial power distribution.

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Datasheet in PDF

Specifications

SKU / Model5SJ4320-8HG42
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breakers
design of the productMiniature circuit-breaker 5SJ4
number of poles3
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 pole2.4 W
operational current-
● at 30 °C / rated value20 A
● at 40 °C / rated value20 A
● at 45 °C / rated value19.4 A
● at 50 °C / rated value19 A
● at 55 °C / rated value18.5 A
● at 60 °C / rated value18 A
● at AC / rated value20 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-
Weight0.498 kg
Dimensions57.00 × 125.00 × 84.00 mm

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