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Siemens Supplementary Protector: 40 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: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XW27, MPN 5SY44407) is a C-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 40 A Amps. It features a Max. AIR Rating of 10kA at…

SKU 3G-OTH-20505

Brand
Siemens
Item
Supplementary Protector: 40 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
5SY44407
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 30XW27, MPN 5SY44407) is a C-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 40 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, a DC Voltage Rating of 72V DC, and a Screw Clamp terminal connection.

Frequently Asked Questions

What is the SIEMENS 5SY44407 supplementary protector used for?

The SIEMENS 5SY44407 is a C-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector used to protect branch circuits and equipment from overcurrents and short circuits in industrial control panels, HVAC systems, and automation applications. It is rated for 40 A Amps and 400V AC systems.

What are the specifications of the SIEMENS 5SY44407?

The SIEMENS 5SY44407 is a 4-pole supplementary protector from the 5SY4 series with a 40 A Amp rating, a Max. AIR Rating of 10kA at 400V AC, a DC Voltage Rating of 72V DC, and a Screw Clamp terminal connection. It is UL1077 listed and designed for DIN rail mounting.

Where to buy the SIEMENS 5SY44407 worldwide?

You can source the SIEMENS 5SY44407 (SKU 30XW27) 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 C-Curve supplementary protector.

How to install the SIEMENS 5SY44407 supplementary protector?

To install the SIEMENS 5SY44407, snap it onto a standard DIN rail, ensuring the C-Curve trip characteristic matches your circuit. Connect wires using the Screw Clamp terminals, torqueing to manufacturer specifications. Always de-energize the system before installation and follow local electrical codes.

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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