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Siemens Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - A-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensA-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XU36, MPN 5SY43255) is a 25 A, A-Curve, 3-pole UL1077 DIN rail-mount supplementary protector from the 5SY4 series. It features a screw clamp terminal connection, with an…

SKU 3G-OTH-20074

Brand
Siemens
Item
Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
A-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY43255
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 30XU36, MPN 5SY43255) is a 25 A, A-Curve, 3-pole UL1077 DIN rail-mount supplementary protector from the 5SY4 series. It features a screw clamp terminal connection, with an AC voltage rating of 400V AC, a DC voltage rating of 72V DC, and a maximum AIR rating of 10kA at 400V AC.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the SIEMENS 5SY43255 supplementary protector used for?

The SIEMENS 5SY43255 is a 25 A, A-Curve, 3-pole UL1077 supplementary protector used to protect industrial control circuits, HVAC equipment, and panelboards against overloads and short circuits. It mounts on a DIN rail and is suitable for 400V AC or 72V DC applications.

What are the specifications of the SIEMENS 5SY43255?

The SIEMENS 5SY43255 is a 25 A, A-Curve, 3-pole supplementary protector from the 5SY4 series. It has a screw clamp terminal, AC voltage rating of 400V AC, DC voltage rating of 72V DC, and a maximum AIR rating of 10kA at 400V AC. It is UL1077 listed for DIN rail mounting.

Where to buy the SIEMENS 5SY43255 worldwide?

You can source the SIEMENS 5SY43255 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 components globally.

How to install the SIEMENS 5SY43255 supplementary protector?

To install the SIEMENS 5SY43255, snap it onto a standard DIN rail. Ensure the circuit is de-energized. Connect wires to the screw clamp terminals per the torque specifications on the device label. Verify polarity for DC applications. Follow Siemens installation guidelines for proper clearance and derating.

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, 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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SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43405). Key specifications — Terminal Connection: Screw Clamp; Series: 5SY4; AC Voltage Rating: 400V AC; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43405). Key specifications — Terminal Connection: Screw Clamp; Series: 5SY4; AC Voltage Rating: 400V AC; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Brand: SIEMENS.