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Siemens 5SY4 D-Curve 1-Pole Supplementary Protector - D-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensD-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens 5SY4 D-Curve 1-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 3G-OTH-20104) is a D-Curve, 1-Pole UL1077 DIN Rail-Mount supplementary protector rated at 13 Amps. Part of the 5SY4 series, it features a Max. AIR Rating of 10kA at…

SKU 3G-OTH-20104

Brand
Siemens
Item
5SY4 D-Curve 1-Pole Supplementary Protector
Category
D-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
5SY41138
Series
5SY4
Type
10kA at 230/400V AC, Screw Clamp, 5SY4, D
DC
72V
Curve Type
D
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 3G-OTH-20104) is a D-Curve, 1-Pole UL1077 DIN Rail-Mount supplementary protector rated at 13 Amps. Part of the 5SY4 series, it features a Max. AIR Rating of 10kA at 230/400V AC, an AC Voltage Rating of 230/400V AC, and a DC Voltage Rating of 72V DC. The unit uses a Screw Clamp terminal connection and carries the manufacturer part number 5SY41138.

Frequently Asked Questions

What is the SIEMENS 5SY41138 supplementary protector used for?

The SIEMENS 5SY41138 is a D-curve, 1-pole supplementary protector rated at 13 Amps. It protects branch circuits and equipment from overloads and short circuits in industrial control panels, HVAC systems, and automation applications. Its D-curve is designed for high inrush loads like motors and transformers.

What are the specifications of the SIEMENS 5SY41138?

The SIEMENS 5SY41138 is a 13 Amp, D-curve, 1-pole supplementary protector from the 5SY4 series. It has an AC voltage rating of 230/400V AC, a DC voltage rating of 72V DC, and a maximum AIR rating of 10kA at 230/400V AC. Terminal connection is screw clamp. It is UL1077 listed for DIN rail mounting.

Where to buy the SIEMENS 5SY41138 worldwide?

You can source the SIEMENS 5SY41138 worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We supply genuine Siemens supplementary protectors to customers across industries.

How to install the SIEMENS 5SY41138 supplementary protector?

Install the SIEMENS 5SY41138 by snapping it onto a standard DIN rail. Ensure the circuit is de-energized. Connect wires to the screw clamp terminals, tightening to the torque specified on the device label. Verify the D-curve matches your load's inrush characteristics. Follow local electrical codes and Siemens installation guidelines.

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 d-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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This 1-pole supplementary protector features a D-curve trip characteristic for high inrush currents, rated 16A with AC voltage 230/400V and DC voltage 72V. It has a maximum interrupting rating of 10kA at 230/400V AC and uses screw clamp terminals. Designed for DIN rail mounting, it is suitable for overcurrent and short-circuit protection in control circuits and equipment
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This 1-pole supplementary protector features a D-curve trip characteristic for high inrush currents, rated 16A with AC voltage 230/400V and DC voltage 72V. It has a maximum interrupting rating of 10kA at 230/400V AC and uses screw clamp terminals. Designed for DIN rail mounting, it is suitable for overcurrent and short-circuit protection in control circuits and equipment
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve characteristic for high-inrush loads such as transformers and small motors. Rated at 2 A with a maximum interrupting rating of 10kA at 230/400V AC and 72V DC, it uses screw clamp terminals for secure wiring. The device mounts on a DIN rail and is UL1077 listed for branch-circuit protection in industrial control circuits, HVAC equipment, and motor starters
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This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve characteristic for high-inrush loads such as transformers and small motors. Rated at 2 A with a maximum interrupting rating of 10kA at 230/400V AC and 72V DC, it uses screw clamp terminals for secure wiring. The device mounts on a DIN rail and is UL1077 listed for branch-circuit protection in industrial control circuits, HVAC equipment, and motor starters
This 1-pole supplementary protector features a D-curve trip characteristic, rated 25 A with a maximum interrupting rating of 10kA at 230/400V AC and 72V DC. It uses screw-clamp terminals and mounts on a DIN rail, complying with UL1077. Suitable for overcurrent protection in industrial control circuits and equipment where branch-circuit protection is not required
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This 1-pole supplementary protector features a D-curve trip characteristic, rated 25 A with a maximum interrupting rating of 10kA at 230/400V AC and 72V DC. It uses screw-clamp terminals and mounts on a DIN rail, complying with UL1077. Suitable for overcurrent protection in industrial control circuits and equipment where branch-circuit protection is not required
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve for high inrush immunity, rated 20A with a maximum AIR of 10kA at 230/400V AC and 72V DC. It uses screw clamp terminals and mounts on DIN rail, suitable for overcurrent and short-circuit protection in industrial control circuits, lighting, and small motor loads
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This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve for high inrush immunity, rated 20A with a maximum AIR of 10kA at 230/400V AC and 72V DC. It uses screw clamp terminals and mounts on DIN rail, suitable for overcurrent and short-circuit protection in industrial control circuits, lighting, and small motor loads
DIN rail-mount supplementary protector with D-curve tripping characteristic for overcurrent protection in industrial control panels, HVAC equipment, and machinery. Rated 32 A, 10kA at 230/400V AC, 72V DC. Screw clamp terminals. UL1077 listed
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DIN rail-mount supplementary protector with D-curve tripping characteristic for overcurrent protection in industrial control panels, HVAC equipment, and machinery. Rated 32 A, 10kA at 230/400V AC, 72V DC. Screw clamp terminals. UL1077 listed
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve for overcurrent protection in circuits with high inrush currents, such as those found in industrial control panels. Rated 10A, 72V DC, and 10kA at 230/400V AC, it uses screw clamp terminals for secure wiring. The unit mounts on DIN rail and is UL1077 listed
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This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve for overcurrent protection in circuits with high inrush currents, such as those found in industrial control panels. Rated 10A, 72V DC, and 10kA at 230/400V AC, it uses screw clamp terminals for secure wiring. The unit mounts on DIN rail and is UL1077 listed

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