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Siemens 5SY43157 C-Curve 3-Pole Supplementary Protector - C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens 5SY43157 C-Curve 3-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 5SY43157, MPN 5SY43157) is a C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protector rated at 1.6 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC…

SKU 3G-OTH-19556

Brand
Siemens
Item
5SY43157 C-Curve 3-Pole Supplementary Protector
Category
C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
5SY43157
Series
5SY4
Type
10kA at 400V AC, Screw Clamp, 5SY4
AC
400V
DC
72V
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 5SY43157, MPN 5SY43157) is a C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protector rated at 1.6 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC Voltage Rating of 400V AC, and DC Voltage Rating of 72V DC, with a Screw Clamp terminal connection from the 5SY4 series.

Frequently Asked Questions

What is the SIEMENS 5SY43157 supplementary protector used for?

The SIEMENS 5SY43157 is a C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector rated at 1.6 A Amps. It protects industrial control circuits, instrumentation, and automation equipment from overloads and short circuits in 400V AC or 72V DC systems.

What are the specifications of the SIEMENS 5SY43157?

The SIEMENS 5SY43157 is a 1.6 A, C-Curve, 3-Pole supplementary protector with a Max. AIR Rating of 10kA at 400V AC. It has an AC Voltage Rating of 400V AC, DC Voltage Rating of 72V DC, and a Screw Clamp terminal connection from the 5SY4 series.

Where to buy the SIEMENS 5SY43157 worldwide?

3G Electric supplies the SIEMENS 5SY43157 supplementary protector worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this 1.6 A, 3-Pole UL1077 device.

How to install the SIEMENS 5SY43157 on a DIN rail?

To install the SIEMENS 5SY43157, snap it onto a standard 35 mm DIN rail. Ensure the rail is clean and the protector is oriented correctly. Use a screwdriver to tighten the Screw Clamp terminals to the recommended torque. Always de-energize the circuit before installation.

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, 3-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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3-pole supplementary protector with C-curve trip characteristic, rated 5 A. Suitable for AC systems up to 400 V and DC systems up to 72 V, with a maximum interrupting rating of 10 kA at 400 V AC. Features screw clamp terminals and is designed for DIN rail mounting in branch circuit and equipment protection applications
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This 3-pole supplementary protector from the Siemens 5SY4 series features a C-curve trip characteristic and is rated for 60 A. It provides overcurrent protection for branch circuits and equipment in industrial control panels, HVAC systems, and machinery. With a maximum interrupting rating of 10 kA at 400 V AC and a DC voltage rating of 72 V, it uses screw clamp terminals for secure wiring connections
This 3-pole supplementary protector from the Siemens 5SY4 series features a C-curve trip characteristic and a rated current of 0.3 A. It is designed for DIN rail mounting and provides overcurrent protection with a maximum interrupting rating of 10kA at 400V AC. The unit accepts AC voltages up to 400V and DC voltages up to 72V, with screw clamp terminals for secure wiring. Typical applications include protection of branch circuits and equipment in industrial control panels, HVAC systems, and automation installations
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This 3-pole supplementary protector from the Siemens 5SY4 series features a C-curve trip characteristic and a rated current of 0.3 A. It is designed for DIN rail mounting and provides overcurrent protection with a maximum interrupting rating of 10kA at 400V AC. The unit accepts AC voltages up to 400V and DC voltages up to 72V, with screw clamp terminals for secure wiring. Typical applications include protection of branch circuits and equipment in industrial control panels, HVAC systems, and automation installations
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This 3-pole supplementary protector from the Siemens 5SY4 series features a C-Curve trip characteristic and is UL1077 recognized. Rated 13A with AC voltage 400V and DC voltage 72V, it provides overcurrent and short-circuit protection for branch circuits and equipment. The maximum interrupting rating is 10kA at 400V AC. Terminal connections are screw clamp type, and the unit mounts on DIN rail. Typical applications include industrial control panels, HVAC systems, and automation equipment
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This 3-pole supplementary protector from the Siemens 5SY4 series features a C-curve trip characteristic and a rated current of 63 A. It is designed for DIN-rail mounting and provides overcurrent and short-circuit protection in branch circuits and equipment. The unit has an AC voltage rating of 400V AC and a DC voltage rating of 72V DC, with a maximum interrupting rating of 10kA at 400V AC. Terminal connections are made via screw clamps

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