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Siemens Miniature Circuit Breaker: 2 A Amps, 125V DC, 10kA at 277/480V AC, Screw Clamp - C-Curve, 2-Pole UL489 DIN Rail-Mount Miniature Circuit Breakers
SiemensC-Curve, 2-Pole UL489 DIN Rail-Mount Miniature Circuit Breakers

Siemens Miniature Circuit Breaker: 2 A Amps, 125V DC, 10kA at 277/480V AC, Screw Clamp

The SIEMENS IEC Miniature Circuit Breaker (SKU 30YC71) is a 2 A, 2-pole, C-Curve, UL489 DIN rail-mount unit from the 5SJ4 series. It is rated for 10kA at 277/480V AC and 125V DC, with screw clamp terminals (MPN…

SKU 3G-OTH-20927

Brand
Siemens
Item
Miniature Circuit Breaker: 2 A Amps, 125V DC, 10kA at 277/480V AC, Screw Clamp
Category
C-Curve, 2-Pole UL489 DIN Rail-Mount Miniature Circuit Breakers
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Technical Specifications

Siemens
Manufacturer Part Number
5SJ42027HG42
Series
5SJ4
Type
10kA at 277/480V AC, Screw Clamp, 5SJ4
DC
125V
Max. AIR Rating
10kA at 277/480V AC
AC Voltage Rating
277/480V AC
DC Voltage Rating
125V DC
Terminal Connection
Screw Clamp
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Miniature Circuit Breaker (SKU 30YC71) is a 2 A, 2-pole, C-Curve, UL489 DIN rail-mount unit from the 5SJ4 series. It is rated for 10kA at 277/480V AC and 125V DC, with screw clamp terminals (MPN 5SJ42027HG42).

Frequently Asked Questions

What is the SIEMENS 5SJ4 miniature circuit breaker used for?

The SIEMENS 5SJ4 miniature circuit breaker protects electrical circuits from overloads and short circuits. It is used in industrial control panels, distribution boards, and equipment requiring UL489 branch-circuit protection. Its C-curve trip characteristic suits moderate inrush loads like motors and transformers.

What are the specifications of the SIEMENS 5SJ42027HG42?

The SIEMENS 5SJ42027HG42 is a 2 A, 2-pole, C-curve miniature circuit breaker from the 5SJ4 series. It has a max AIR rating of 10kA at 277/480V AC and a DC voltage rating of 125V DC. Terminal connection is screw clamp. It is UL489 listed for DIN rail mounting.

Where to buy the SIEMENS 5SJ4 circuit breaker worldwide?

You can source the SIEMENS 5SJ4 circuit breaker through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this Siemens 5SJ4 series breaker.

How to install the SIEMENS 5SJ4 miniature circuit breaker?

Install the SIEMENS 5SJ4 breaker by snapping it onto a standard DIN rail. Ensure the rail is clean and the breaker clips engage firmly. Connect wires using the screw clamp terminals per the torque specs in the manual. Always de-energize the circuit before installation and follow local electrical codes.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens c-curve, 2-pole ul489 din rail-mount miniature circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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SIEMENS IEC Miniature Circuit Breaker: 3 A Amps, 125V DC, 10kA at 277/480V AC, Screw Clamp, 5SJ4 (MPN 5SJ42037HG42). Key specifications — DC Voltage Rating: 125V DC; Brand: SIEMENS; Max. AIR Rating: 10kA at 277/480V AC; Terminal Connection: Screw Clamp; AC Voltage Rating: 277/480V AC.
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SIEMENS IEC Miniature Circuit Breaker: 1 A Amps, 125V DC, 10kA at 277/480V AC, Screw Clamp, 5SJ4 (MPN 5SJ42017HG42). Key specifications — DC Voltage Rating: 125V DC; Brand: SIEMENS; Max. AIR Rating: 10kA at 277/480V AC; Terminal Connection: Screw Clamp; AC Voltage Rating: 277/480V AC.
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