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Siemens Supplementary Protector: 8 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - C-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 8 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XV93, MPN 5SY44087) is a C-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It is rated for 8 A Amps, with a maximum AIR rating of 10kA…

SKU 3G-OTH-20566

Brand
Siemens
Item
Supplementary Protector: 8 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
C-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY44087
Series
5SY4
Type
10kA at 400V AC, Screw Clamp, C
AC
400V
DC
72V
Max. AIR Rating
10kA at 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 30XV93, MPN 5SY44087) is a C-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It is rated for 8 A Amps, with a maximum AIR rating of 10kA at 400V AC and a DC voltage rating of 72V DC. The unit features a screw clamp terminal connection.

Frequently Asked Questions

What is the SIEMENS 5SY44087 supplementary protector used for?

The SIEMENS 5SY44087 is a C-curve, 4-pole supplementary protector designed to protect branch circuits and equipment against overloads and short circuits in industrial control panels, HVAC systems, and automation applications. It mounts on a DIN rail and is UL1077 listed for use in North American and global installations.

What are the specifications of the SIEMENS 5SY44087?

The SIEMENS 5SY44087 is rated for 8 A amps, with a maximum AIR rating of 10kA at 400V AC and a DC voltage rating of 72V DC. It features a screw clamp terminal connection, a C-curve trip characteristic, and is part of the 5SY4 series. The unit is a 4-pole DIN rail-mount supplementary protector.

Where to buy the SIEMENS 5SY44087 worldwide?

You can source the SIEMENS 5SY44087 through 3G Electric, a global industrial equipment distributor established in 1990. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens supplementary protectors to procurement teams globally.

How to install the SIEMENS 5SY44087 supplementary protector?

Install the SIEMENS 5SY44087 by snapping it onto a standard 35 mm DIN rail. Ensure the circuit is de-energized before wiring. Connect conductors to the screw clamp terminals per the torque specifications on the device label. The C-curve characteristic provides magnetic trip between 5 and 10 times rated current for moderate inrush 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, 4-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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