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Siemens Supplementary Protector: 15 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 15 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 3G-OTH-19638) is a C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 15 A Amps. It features a Max. AIR Rating of 10kA at 400V…

SKU 3G-OTH-19638

Brand
Siemens
Item
Supplementary Protector: 15 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
C-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
5SY43187
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 3G-OTH-19638) is a C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 15 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, with AC Voltage Rating of 400V AC and DC Voltage Rating of 72V DC, and uses a Screw Clamp terminal connection (MPN 5SY43187).

Frequently Asked Questions

What is the SIEMENS 5SY43187 supplementary protector used for?

The SIEMENS 5SY43187 is a C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector rated at 15 A Amps. It protects branch circuits and equipment from overloads and short circuits in industrial control panels, HVAC systems, and machinery across 14 industrial departments.

What are the specifications of the SIEMENS 5SY43187?

The SIEMENS 5SY43187 is a 15 A Amps, C-Curve, 3-Pole supplementary protector from the 5SY4 series. It has a Max. AIR Rating of 10kA at 400V AC, AC Voltage Rating of 400V AC, DC Voltage Rating of 72V DC, and a Screw Clamp terminal connection.

Where to buy the SIEMENS 5SY43187 in worldwide?

3G Electric supplies the SIEMENS 5SY43187 supplementary protector to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this and other Siemens industrial components.

How to install the SIEMENS 5SY43187 supplementary protector?

Install the SIEMENS 5SY43187 on a standard DIN rail. Ensure the circuit is de-energized, then snap the protector onto the rail. Connect wires to the Screw Clamp terminals per the torque specifications in the datasheet. Verify polarity for DC applications.

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, 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
3-pole supplementary protector with C-curve trip characteristic, rated 16 A. AC voltage rating 400 V, DC voltage rating 72 V, with a maximum interrupting rating of 10 kA at 400 V AC. Screw clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and equipment within industrial control panels and automation systems
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3-pole supplementary protector with C-curve trip characteristic, rated 16 A. AC voltage rating 400 V, DC voltage rating 72 V, with a maximum interrupting rating of 10 kA at 400 V AC. Screw clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and equipment within industrial control panels and automation systems
This 3-pole supplementary protector from the Siemens 5SY4 series features a C-Curve trip characteristic and is UL1077 recognized. Rated 13A with AC voltage 400V and DC voltage 72V, it provides overcurrent and short-circuit protection for branch circuits and equipment. The maximum interrupting rating is 10kA at 400V AC. Terminal connections are screw clamp type, and the unit mounts on DIN rail. Typical applications include industrial control panels, HVAC systems, and automation equipment
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This 3-pole supplementary protector from the Siemens 5SY4 series features a C-Curve trip characteristic and is UL1077 recognized. Rated 13A with AC voltage 400V and DC voltage 72V, it provides overcurrent and short-circuit protection for branch circuits and equipment. The maximum interrupting rating is 10kA at 400V AC. Terminal connections are screw clamp type, and the unit mounts on DIN rail. Typical applications include industrial control panels, HVAC systems, and automation equipment
SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43407)
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SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43407)
SIEMENS IEC Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43157)
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SIEMENS IEC Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43157)
SIEMENS IEC Supplementary Protector: 45 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43457)
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C-curve, 3-pole supplementary protector rated 30 A, 400 V AC / 72 V DC, with 10 kA interrupting capacity at 400 V AC. Screw clamp terminals for DIN rail mounting. Suitable for overcurrent and short-circuit protection in control circuits and equipment where branch circuit protection is not required

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