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Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated

SIEMENS

Siemens 5SJ4120-6HG40 Miniature Circuit Breaker 1-Pole, 20A, 240V, 14kA, UL 489 Rated Original Brand New

Model / SKU5SJ4120-6HG40

High-performance, single-pole miniature circuit breaker (MCB) designed for superior branch circuit protection. Rated at 20A and 240V, it features a 14kA interrupting capacity and complies strictly with UL 489 standards, ensuring safety and reliability in demanding electrical environments.

Original price was: $68.10.Current price is: $36.63.
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  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 5SJ4120-6HG40 is part of the renowned Sentron series, specifically engineered for the North American market. This B-characteristic MCB provides essential protection against overloads and short circuits. With a compact mounting depth of 70 mm and "equal polarity" design, it is an ideal choice for industrial control panels and commercial electrical distribution where UL 489 compliance is mandatory.

Key Benefit

  • Certified Safety: Fully compliant with UL 489 and CSA C22.2, making it suitable for branch circuit protection in the US and Canada.

  • High Breaking Capacity: Handles up to 14kA at 240V, protecting sensitive equipment from high-energy faults.

  • Space-Efficient: The 70 mm design allows for seamless integration into standard enclosures and DIN rail setups.

  • Global Reliability: Siemens engineering ensures long-term operational stability and reduced downtime.

Function

  • Overcurrent Protection: Prevents thermal damage to wiring by tripping during sustained overloads.

  • Short-Circuit Protection: Instantaneous magnetic tripping (B-characteristic) to mitigate the risks of electrical faults.

  • Circuit Isolation: Provides a reliable means of manually disconnecting electrical circuits for maintenance.

Technical Specification

  • Brand: Siemens

  • Product Number: 5SJ4120-6HG40

  • Type: Miniature Circuit Breaker (MCB)

  • Rated Voltage: 240 V

  • Breaking Capacity: 14 kA

  • Poles: 1-Pole

  • Tripping Curve: B-Curve

  • Rated Current: 20 A

  • Depth (D): 70 mm

  • Standard: UL 489

  • Polarity: Equal polarity

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Datasheet in PDF

Specifications

SKU / Model5SJ4120-6HG40
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breakers
design of the productMiniature circuit-breaker 5SJ4
number of poles1
tripping characteristic classB
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 / maximum120 V
● at DC / rated value / maximum60 V
● at DC / single channel / acc. to UL 489 and CSA C22.2 No. 5-02 / maximum60 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 pole2.7 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 value18.8 A
● at 55 °C / rated value18.1 A
● at 60 °C / rated value17.6 A
● at AC / rated value20 A
type of voltage supply / at AC / acc. to UL 489 and CSA C22.2 No. 5-02240/120
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.23514 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 units1
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
Test Certificatesother
Special Test CertificateMiscellaneous
Weight0.163 kg
Dimensions21.00 × 93.00 × 83.00 mm

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