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Siemens 5SJ4108-7HG40 Miniature Circuit Breaker 1-Pole, 8A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4108-7HG40 Miniature Circuit Breaker 1-Pole, 8A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4108-7HG40 Miniature Circuit Breaker 1-Pole, 8A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4108-7HG40 Miniature Circuit Breaker 1-Pole, 8A, 240V, 14kA, UL 489 Rated
Siemens 5SJ4108-7HG40 Miniature Circuit Breaker 1-Pole, 8A, 240V, 14kA, UL 489 Rated

SIEMENS

Siemens 5SJ4108-7HG40 Miniature Circuit Breaker 1-Pole, 8A, 240V, 14kA, UL 489 Rated Original Brand New

Model / SKU5SJ4108-7HG40

High-performance, 1-pole Miniature Circuit Breaker (MCB) rated for 8A and 240V. Designed specifically for branch circuit protection according to UL 489 standards, it features a 14kA interrupting capacity and a C-Trip characteristic, ensuring reliable safety for industrial and commercial electrical systems.

Original price was: $102.58.Current price is: $55.17.
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  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 5SJ4108-7HG40 Miniature Circuit Breaker (MCB) is a high-performance electrical protection device designed for reliable overcurrent and short-circuit protection. Rated at 240 V, 8 Amps, and 14kA breaking capacity, this 1-pole C-curve MCB complies with UL 489 standards, ensuring safety, durability, and consistent performance in residential, commercial, and industrial electrical systems.

With a compact 70 mm depth and equal polarity design, this Siemens circuit breaker is ideal for modern electrical panels where space efficiency and compliance are critical.

Benefit

  • Global Compliance: Fully compliant with UL 489 standards for branch circuit protection in North America.

  • Space-Saving Design: With a mounting depth of 70mm, it fits easily into standard distribution boards and control cabinets.

  • Enhanced Safety: Provides a high interrupting capacity of 14kA to prevent equipment damage during high-fault currents.

  • Easy Installation: Features "equal polarity" terminals, simplifying the wiring process and reducing installation errors.

Function

  • Overload Protection: Thermal tripping element calibrated for 8A continuous load.

  • Short-Circuit Protection: Instantaneous magnetic tripping (C-Curve) for handling moderate inrush currents.

  • Branch Circuit Isolation: Specifically designed to protect the "branch" of an electrical circuit, not just the equipment (supplementary).

Technical Specification

  • Product Number: 5SJ4108-7HG40

  • Voltage Rating: 240 V

  • Current Rating: 8A

  • Breaking Capacity: 14kA

  • Number of Poles: 1-Pole

  • Tripping Curve: C

  • Depth (D): 70 mm

  • Standard: UL 489

  • Polarity: Equal polarity

  • Brand: Siemens

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Datasheet in PDF

Specifications

SKU / Model5SJ4108-7HG40
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breakers
design of the productMiniature circuit-breaker 5SJ4
number of poles1
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
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 pole2.6 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. 5-02240/120
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
Weight0.161 kg
Dimensions21.00 × 93.00 × 83.00 mm

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