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Siemens Supplementary Protector: 0.5 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp - A-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensA-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 0.5 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 5SY41055, MPN 5SY41055) is a 0.5 A, A-Curve, 1-pole UL1077 DIN rail-mount supplementary protector from the 5SY4 series. It features a screw clamp terminal connection and…

SKU 3G-OTH-21501

Brand
Siemens
Item
Supplementary Protector: 0.5 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp
Category
A-Curve, 1-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
5SY41055
Series
5SY4
Type
10kA at 230/400V AC, Screw Clamp, 5SY4, A
DC
72V
Curve Type
A
Max. AIR Rating
10kA at 230/400V AC
AC Voltage Rating
230/400V 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 5SY41055, MPN 5SY41055) is a 0.5 A, A-Curve, 1-pole UL1077 DIN rail-mount supplementary protector from the 5SY4 series. It features a screw clamp terminal connection and is rated for 10kA at 230/400V AC and 72V DC.

Frequently Asked Questions

What is the SIEMENS 5SY41055 supplementary protector used for?

The SIEMENS 5SY41055 is a 0.5 A, A-Curve, 1-pole UL1077 DIN rail-mount supplementary protector used to protect downstream equipment from overcurrents and short circuits in industrial control panels, HVAC systems, and automation applications.

What are the specifications of the SIEMENS 5SY41055?

The SIEMENS 5SY41055 is rated 0.5 A, 72V DC, and 10kA at 230/400V AC. It features a screw clamp terminal connection, A-Curve trip characteristic, and is part of the 5SY4 series. It is a 1-pole UL1077 DIN rail-mount supplementary protector.

Where to buy the SIEMENS 5SY41055 worldwide?

3G Electric supplies the SIEMENS 5SY41055 supplementary protector worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this item.

How to install the SIEMENS 5SY41055 supplementary protector?

Install the SIEMENS 5SY41055 by snapping it onto a standard DIN rail. Connect wires using the screw clamp terminals, ensuring proper torque per the manufacturer's instructions. 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 a-curve, 1-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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Compatible alternatives & equivalents

Cross-referenced by specification & description
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41105)
Siemens
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41105)
SIEMENS IEC Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41155)
Siemens
SIEMENS IEC Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41155)
SIEMENS IEC Supplementary Protector: 8 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41085)
Siemens
SIEMENS IEC Supplementary Protector: 8 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41085)
SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41635)
Siemens
SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41635)
SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41035)
Siemens
SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41035)
SIEMENS IEC Supplementary Protector: 6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41065)
Siemens
SIEMENS IEC Supplementary Protector: 6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, A (MPN 5SY41065)

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This 1-pole supplementary protector features an A-curve trip characteristic for overcurrent protection of sensitive electronic loads. Rated 16A at 230/400V AC (10kA interrupting capacity) and 72V DC, it uses screw-clamp terminals and mounts on DIN rail. Suitable for branch circuit and equipment protection in control panels
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This 1-pole supplementary protector features an A-curve trip characteristic for overcurrent protection of sensitive electronic loads. Rated 16A at 230/400V AC (10kA interrupting capacity) and 72V DC, it uses screw-clamp terminals and mounts on DIN rail. Suitable for branch circuit and equipment protection in control panels
The Siemens 5SY41205 is a 20 A, A-curve supplementary protector with a screw clamp terminal connection. It is rated for 230/400V AC with a 10kA interrupting capacity and 72V DC. Designed for DIN rail mounting, it provides overload and short-circuit protection in branch circuits and control panels
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The Siemens 5SY41205 is a 20 A, A-curve supplementary protector with a screw clamp terminal connection. It is rated for 230/400V AC with a 10kA interrupting capacity and 72V DC. Designed for DIN rail mounting, it provides overload and short-circuit protection in branch circuits and control panels
This 1-pole supplementary protector features an A-curve trip characteristic for overcurrent protection in branch circuits. Rated 25 A with 10kA interrupting capacity at 230/400V AC and 72V DC, it uses screw clamp terminals and mounts on DIN rail. Suitable for industrial control panels, HVAC equipment, and lighting circuits
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This 1-pole supplementary protector features an A-curve trip characteristic for overcurrent protection in branch circuits. Rated 25 A with 10kA interrupting capacity at 230/400V AC and 72V DC, it uses screw clamp terminals and mounts on DIN rail. Suitable for industrial control panels, HVAC equipment, and lighting circuits
This Siemens 5SY4 series supplementary protector is a 1-pole, A-curve device rated 40 A with a maximum interrupting rating of 10 kA at 230/400 V AC and 72 V DC. It features screw-clamp terminals and mounts on DIN rails. Suitable for overcurrent protection in control panels and industrial equipment
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This Siemens 5SY4 series supplementary protector is a 1-pole, A-curve device rated 40 A with a maximum interrupting rating of 10 kA at 230/400 V AC and 72 V DC. It features screw-clamp terminals and mounts on DIN rails. Suitable for overcurrent protection in control panels and industrial equipment
This 1-pole supplementary protector from the Siemens 5SY4 series features an A-curve trip characteristic and a rated current of 4 A. It is UL1077 listed for DIN rail mounting and provides overcurrent protection for downstream equipment. Suitable for AC circuits up to 230/400V with a 10kA interrupting rating and DC circuits up to 72V. Terminal connection is via screw clamp
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This 1-pole supplementary protector from the Siemens 5SY4 series features an A-curve trip characteristic and a rated current of 4 A. It is UL1077 listed for DIN rail mounting and provides overcurrent protection for downstream equipment. Suitable for AC circuits up to 230/400V with a 10kA interrupting rating and DC circuits up to 72V. Terminal connection is via screw clamp
The Siemens 5SY41025 is a 2A, A-curve, 1-pole supplementary protector for DIN rail mounting. It features screw clamp terminals and is rated for 10kA at 230/400V AC and 72V DC. Suitable for overcurrent protection in control panels, HVAC, and lighting circuits
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The Siemens 5SY41025 is a 2A, A-curve, 1-pole supplementary protector for DIN rail mounting. It features screw clamp terminals and is rated for 10kA at 230/400V AC and 72V DC. Suitable for overcurrent protection in control panels, HVAC, and lighting circuits
This 1-pole supplementary protector from the Siemens 5SY4 series features an A-curve trip characteristic and a rated current of 13 A. It is designed for DIN rail mounting and provides overcurrent protection in branch circuits and equipment. The unit has a maximum interrupting rating of 10 kA at 230/400 V AC and is also rated for 72 V DC. Connection is via screw clamp terminals
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This 1-pole supplementary protector from the Siemens 5SY4 series features an A-curve trip characteristic and a rated current of 13 A. It is designed for DIN rail mounting and provides overcurrent protection in branch circuits and equipment. The unit has a maximum interrupting rating of 10 kA at 230/400 V AC and is also rated for 72 V DC. Connection is via screw clamp terminals
This 1-pole supplementary protector from the Siemens 5SY4 series features an A-curve trip characteristic and a rated current of 50 A. It is rated for 10 kA at 230/400 V AC and 72 V DC, with screw clamp terminals for secure wiring. Designed for DIN rail mounting, it is suitable for protecting branch circuits and equipment against overloads and short circuits in industrial control panels, HVAC systems, and lighting applications
Siemens
This 1-pole supplementary protector from the Siemens 5SY4 series features an A-curve trip characteristic and a rated current of 50 A. It is rated for 10 kA at 230/400 V AC and 72 V DC, with screw clamp terminals for secure wiring. Designed for DIN rail mounting, it is suitable for protecting branch circuits and equipment against overloads and short circuits in industrial control panels, HVAC systems, and lighting applications