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Siemens 5SY4 Series D-Curve 3-Pole Supplementary Protector - D-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensD-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens 5SY4 Series D-Curve 3-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 5SY43108, MPN 5SY43108) is a D-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 10 A Amps. It features an AC voltage rating of…

SKU 3G-OTH-20911

Brand
Siemens
Item
5SY4 Series D-Curve 3-Pole Supplementary Protector
Category
D-Curve, 3-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
5SY43108
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

Technical Documents

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

Product Description

The SIEMENS IEC Supplementary Protector (SKU 5SY43108, MPN 5SY43108) is a D-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 10 A Amps. It features an AC voltage rating of 400V AC, a DC voltage rating of 72V DC, and a maximum AIR rating of 10kA at 400V AC, with a screw clamp terminal connection.

Frequently Asked Questions

What is the SIEMENS 5SY43108 supplementary protector used for?

The SIEMENS 5SY43108 is a D-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector used to protect industrial control circuits, HVAC equipment, and motor starters from overcurrents and short circuits. It is rated 10 A Amps, 400V AC, and 72V DC, making it suitable for global panel-building applications.

What are the specifications of the SIEMENS 5SY43108?

The SIEMENS 5SY43108 is a 10 A Amps, D-Curve, 3-Pole supplementary protector from the 5SY4 series. It has an AC voltage rating of 400V AC, a DC voltage rating of 72V DC, a maximum AIR rating of 10kA at 400V AC, and a screw clamp terminal connection. It is UL1077 listed for DIN rail mounting.

Where to buy the SIEMENS 5SY43108 worldwide?

You can source the SIEMENS 5SY43108 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 industrial buyers globally.

How to install the SIEMENS 5SY43108 supplementary protector?

Install the SIEMENS 5SY43108 by snapping it onto a standard DIN rail. Ensure the circuit is de-energized. Connect wires to the screw clamp terminals per the torque specifications in the datasheet. Verify the D-Curve trip characteristic matches your load's inrush current. Test operation after installation.

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, 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43138)
Siemens
SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43138)
SIEMENS IEC Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43148)
Siemens
SIEMENS IEC Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43148)
SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43168)
Siemens
SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43168)
SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43638)
Siemens
SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43638)
SIEMENS IEC Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43158)
Siemens
SIEMENS IEC Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43158)
SIEMENS IEC Supplementary Protector: 1 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43018)
Siemens
SIEMENS IEC Supplementary Protector: 1 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43018)

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