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Siemens 5SY6 Series C-Curve 1-Pole UL1077 Supplementary Protector - C-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens 5SY6 Series C-Curve 1-Pole UL1077 Supplementary Protector

The Siemens 5SY6 series IEC Supplementary Protector is a 25 A, C-curve, 1-pole UL1077 DIN rail-mount supplementary protector. It features a screw clamp terminal connection and a maximum AIR rating of 5kA at 230/400V…

SKU 3G-OTH-19836

Brand
Siemens
Item
5SY6 Series C-Curve 1-Pole UL1077 Supplementary Protector
Category
C-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
5SY61257
Series
5SY6
Type
5kA at 230/400V AC, Screw Clamp, 5SY6
AC
230/400V
Curve Type
C
Max. AIR Rating
5kA at 230/400V AC
AC Voltage Rating
230/400V AC
DC Voltage Rating
Not Rated
Terminal Connection
Screw Clamp

Technical Documents

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens 5SY6 series IEC Supplementary Protector is a 25 A, C-curve, 1-pole UL1077 DIN rail-mount supplementary protector. It features a screw clamp terminal connection and a maximum AIR rating of 5kA at 230/400V AC, with an AC voltage rating of 230/400V AC and no DC voltage rating.

Frequently Asked Questions

What is the Siemens 5SY61257 supplementary protector used for?

The Siemens 5SY61257 is a 25 A, C-curve, 1-pole supplementary protector designed for overcurrent protection in industrial control panels, HVAC equipment, and lighting circuits. It mounts on DIN rails and is rated for 230/400V AC systems with a 5kA interrupting capacity.

What are the specifications of the Siemens 5SY61257?

The Siemens 5SY61257 is a 25 A, C-curve, 1-pole supplementary protector with a screw clamp terminal. It has a max AIR rating of 5kA at 230/400V AC, AC voltage rating of 230/400V AC, and no DC rating. It is part of the 5SY6 series and complies with UL1077.

Where to buy the Siemens 5SY61257 worldwide?

You can source the Siemens 5SY61257 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 supplementary protector.

How to install the Siemens 5SY61257 supplementary protector?

To install the Siemens 5SY61257, snap it onto a 35 mm DIN rail. Connect the line wire to the top screw clamp terminal and the load wire to the bottom terminal, tightening to the specified torque. Ensure the circuit is de-energized and follow Siemens' mounting guidelines for proper operation.

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, 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
This 1-pole supplementary protector features a C-curve trip characteristic and is rated for 20 A at 230/400 V AC with a maximum interrupting rating of 5 kA. It uses screw clamp terminals and is designed for DIN rail mounting. Suitable for protecting branch circuits and equipment against overloads and short circuits in industrial control panels, HVAC systems, and lighting applications where UL489 circuit breakers are not required
Siemens
This 1-pole supplementary protector features a C-curve trip characteristic and is rated for 20 A at 230/400 V AC with a maximum interrupting rating of 5 kA. It uses screw clamp terminals and is designed for DIN rail mounting. Suitable for protecting branch circuits and equipment against overloads and short circuits in industrial control panels, HVAC systems, and lighting applications where UL489 circuit breakers are not required
This 1-pole supplementary protector features a C-curve trip characteristic and is rated for 63 A at 230/400 V AC. It has a maximum interrupting rating of 5 kA at 230/400 V AC and uses screw clamp terminals. 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 features a C-curve trip characteristic and is rated for 63 A at 230/400 V AC. It has a maximum interrupting rating of 5 kA at 230/400 V AC and uses screw clamp terminals. 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
This 1-pole supplementary protector from the Siemens 5SY6 series is rated for 32 A with a C-curve trip characteristic. It provides overcurrent protection in branch circuits of industrial control panels, HVAC equipment, and lighting systems. The unit mounts on DIN rails and features screw clamp terminals for secure wiring. It is UL1077 recognized and rated for 230/400 V AC with a maximum interrupting rating of 5 kA
Siemens
This 1-pole supplementary protector from the Siemens 5SY6 series is rated for 32 A with a C-curve trip characteristic. It provides overcurrent protection in branch circuits of industrial control panels, HVAC equipment, and lighting systems. The unit mounts on DIN rails and features screw clamp terminals for secure wiring. It is UL1077 recognized and rated for 230/400 V AC with a maximum interrupting rating of 5 kA
Siemens 5SY6 series supplementary protector, 1-pole, C-curve, rated 13 A. UL1077 listed for overcurrent protection in industrial control panels, HVAC equipment, and lighting systems. AC voltage rating 230/400 V, maximum interrupting rating 5 kA at 230/400 V AC. Screw clamp terminals for wiring. Not rated for DC voltage
Siemens
Siemens 5SY6 series supplementary protector, 1-pole, C-curve, rated 13 A. UL1077 listed for overcurrent protection in industrial control panels, HVAC equipment, and lighting systems. AC voltage rating 230/400 V, maximum interrupting rating 5 kA at 230/400 V AC. Screw clamp terminals for wiring. Not rated for DC voltage
This Siemens 5SY6 series supplementary protector is a 1-pole, C-curve device rated for 50 A. It provides overload and short-circuit protection for AC circuits up to 230/400 V AC with a maximum interrupting rating of 5 kA. The unit features screw clamp terminals and is designed for DIN rail mounting. Typical applications include protection of control circuits, HVAC equipment, and panelboard branch circuits in industrial and commercial installations
Siemens
This Siemens 5SY6 series supplementary protector is a 1-pole, C-curve device rated for 50 A. It provides overload and short-circuit protection for AC circuits up to 230/400 V AC with a maximum interrupting rating of 5 kA. The unit features screw clamp terminals and is designed for DIN rail mounting. Typical applications include protection of control circuits, HVAC equipment, and panelboard branch circuits in industrial and commercial installations
SIEMENS IEC Supplementary Protector: 3 A Amps, 5kA at 230/400V AC, Screw Clamp, 5SY6, 230/400V AC, C (MPN 5SY61037)
Siemens
SIEMENS IEC Supplementary Protector: 3 A Amps, 5kA at 230/400V AC, Screw Clamp, 5SY6, 230/400V AC, C (MPN 5SY61037)

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C-curve, 1-pole supplementary protector rated 16 A with screw clamp terminals. Provides overcurrent protection for control circuits, instrumentation, and industrial equipment. UL1077 listed for DIN rail mounting. AC voltage rating 230/400V, DC voltage rating 72V, maximum AIR 10kA at 230/400V AC
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C-curve, 1-pole supplementary protector rated 16 A with screw clamp terminals. Provides overcurrent protection for control circuits, instrumentation, and industrial equipment. UL1077 listed for DIN rail mounting. AC voltage rating 230/400V, DC voltage rating 72V, maximum AIR 10kA at 230/400V AC
This 1-pole supplementary protector from the Siemens 5SY4 series features a C-curve trip characteristic and a rated current of 50 A. It is UL1077 recognized for overcurrent protection of control circuits, instrumentation, and industrial equipment. The unit mounts on a DIN rail and uses screw clamp terminals, with AC voltage rating of 230/400V AC and DC voltage rating of 72V DC
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This 1-pole supplementary protector from the Siemens 5SY4 series features a C-curve trip characteristic and a rated current of 50 A. It is UL1077 recognized for overcurrent protection of control circuits, instrumentation, and industrial equipment. The unit mounts on a DIN rail and uses screw clamp terminals, with AC voltage rating of 230/400V AC and DC voltage rating of 72V DC
C-curve, 1-pole supplementary protector for DIN rail mounting, rated 13 A. Provides overload and short-circuit protection in industrial control circuits and equipment. UL1077 listed, with screw clamp terminals. AC rating 230/400 V, DC rating 72 V
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C-curve, 1-pole supplementary protector for DIN rail mounting, rated 13 A. Provides overload and short-circuit protection in industrial control circuits and equipment. UL1077 listed, with screw clamp terminals. AC rating 230/400 V, DC rating 72 V
1-pole C-curve supplementary protector rated 1 A, 5kA at 230/400V AC. UL1077 listed for DIN rail mounting. Screw clamp terminals. Suitable for overload and short-circuit protection in branch circuits and control panels
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1-pole C-curve supplementary protector rated 1 A, 5kA at 230/400V AC. UL1077 listed for DIN rail mounting. Screw clamp terminals. Suitable for overload and short-circuit protection in branch circuits and control panels
C-curve, 1-pole UL1077 supplementary protector rated 6 A with screw clamp terminals. Provides overcurrent protection for branch circuits and equipment in industrial control panels, HVAC systems, and lighting applications. Rated 10kA at 230/400V AC and 72V DC for DC control circuits
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C-curve, 1-pole UL1077 supplementary protector rated 6 A with screw clamp terminals. Provides overcurrent protection for branch circuits and equipment in industrial control panels, HVAC systems, and lighting applications. Rated 10kA at 230/400V AC and 72V DC for DC control circuits
This C-curve, 1-pole supplementary protector is rated for 5 A and provides overcurrent protection for industrial equipment and control circuits. It has a maximum interrupting rating of 10 kA at 230/400 V AC and a DC voltage rating of 72 V. The device features screw clamp terminals and is designed for DIN rail mounting
Siemens
This C-curve, 1-pole supplementary protector is rated for 5 A and provides overcurrent protection for industrial equipment and control circuits. It has a maximum interrupting rating of 10 kA at 230/400 V AC and a DC voltage rating of 72 V. The device features screw clamp terminals and is designed for DIN rail mounting
This 1-pole supplementary protector features a C-curve trip characteristic and is rated 16 A at 230/400 V AC with a maximum interrupting rating of 5 kA. It uses screw clamp terminals and is designed for DIN rail mounting. Typical applications include protection of branch circuits in control panels, HVAC equipment, and lighting systems
Siemens
This 1-pole supplementary protector features a C-curve trip characteristic and is rated 16 A at 230/400 V AC with a maximum interrupting rating of 5 kA. It uses screw clamp terminals and is designed for DIN rail mounting. Typical applications include protection of branch circuits in control panels, HVAC equipment, and lighting systems
This 1-pole supplementary protector features a C-curve trip characteristic for overload and short-circuit protection. Rated 15A with 10kA interrupting capacity at 230/400V AC and 72V DC, it uses screw clamp terminals for secure wiring. Suitable for DIN rail mounting in branch circuit and equipment protection applications
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This 1-pole supplementary protector features a C-curve trip characteristic for overload and short-circuit protection. Rated 15A with 10kA interrupting capacity at 230/400V AC and 72V DC, it uses screw clamp terminals for secure wiring. Suitable for DIN rail mounting in branch circuit and equipment protection applications