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Siemens Supplementary Protector: 25 A Amps, 5kA at 230/400V AC, Screw Clamp, 5SY6 - C-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 25 A Amps, 5kA at 230/400V AC, Screw Clamp, 5SY6

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
Supplementary Protector: 25 A Amps, 5kA at 230/400V AC, Screw Clamp, 5SY6
Category
C-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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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
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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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