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Siemens Supplementary Protector: 35 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - C-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 35 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XV10, MPN 5SY42357) is a 35 A, C-Curve, 2-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It features a screw clamp terminal connection and is…

SKU 3G-OTH-21201

Brand
Siemens
Item
Supplementary Protector: 35 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
C-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY42357
Series
5SY4
Type
10kA at 400V AC, Screw Clamp, 5SY4
AC
400V
DC
72V
Curve Type
C
Max. AIR Rating
10kA at 400V AC
AC Voltage Rating
400V AC
DC Voltage Rating
72V DC
Terminal Connection
Screw Clamp
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Supplementary Protector (SKU 30XV10, MPN 5SY42357) is a 35 A, C-Curve, 2-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It features a screw clamp terminal connection and is rated for 400V AC (10kA max. AIR) and 72V DC.

Frequently Asked Questions

What is the SIEMENS 5SY42357 supplementary protector used for?

The SIEMENS 5SY42357 is a 35 A, C-curve, 2-pole supplementary protector designed for overcurrent protection in industrial control panels, HVAC equipment, and lighting circuits. It mounts on a DIN rail and meets UL1077 standards for branch-circuit protection in 400V AC or 72V DC systems.

What are the specifications of the SIEMENS 5SY42357?

The SIEMENS 5SY42357 is rated 35 A, 400V AC with a 10kA interrupting capacity, and 72V DC. It uses a screw clamp terminal connection, has a C-curve trip characteristic, and is part of the 5SY4 series. This 2-pole DIN rail-mount device is UL1077 listed for supplementary protection.

Where to buy the SIEMENS 5SY42357 worldwide?

3G Electric supplies the SIEMENS 5SY42357 supplementary protector worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this 5SY4 series protector to any country.

How to install the SIEMENS 5SY42357 supplementary protector?

Install the SIEMENS 5SY42357 by snapping it onto a 35 mm DIN rail. Connect wires using the screw clamp terminals, torquing to manufacturer specifications. Ensure the circuit is de-energized before installation. This C-curve protector is suitable for general-purpose overcurrent protection in industrial panels.

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 ul1077 din rail-mount supplementary protectors. 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 Supplementary Protector: 16 A Amps, 5kA at 400V AC, Screw Clamp, 5SY6, 400V AC, C (MPN 5SY62167). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: C; DC Voltage Rating: Not Rated; Max. AIR Rating: 5kA at 400V AC; Series: 5SY6; Brand: SIEMENS.
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