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Siemens Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - B-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensB-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XW22) is a B-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It is rated for 32 A Amps with a maximum AIR rating of 10kA at 400V AC and…

SKU 3G-OTH-21767

Brand
Siemens
Item
Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
B-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY44326
Series
5SY4
Type
10kA at 400V AC, Screw Clamp, B
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 30XW22) is a B-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It is rated for 32 A Amps with a maximum AIR rating of 10kA at 400V AC and a DC voltage rating of 72V DC. The terminal connection uses a screw clamp, and the manufacturer part number is 5SY44326.

Frequently Asked Questions

What is a Siemens 5SY4 supplementary protector used for?

The Siemens 5SY4 supplementary protector (MPN 5SY44326) protects branch circuits and equipment from overcurrent and short circuits in industrial control panels, HVAC systems, and machinery. Its B-curve trip characteristic suits resistive and lighting loads, and the 4-pole design supports three-phase AC or DC applications up to 72V DC.

What are the specifications of the Siemens 5SY44326 supplementary protector?

The Siemens 5SY44326 is a B-curve, 4-pole supplementary protector rated 32 A Amps, 400V AC, and 72V DC. It has a maximum AIR rating of 10kA at 400V AC and uses screw-clamp terminals. It is part of the 5SY4 series and complies with UL1077 for DIN rail mounting.

Where to buy a Siemens 5SY44326 supplementary protector worldwide?

3G Electric supplies the Siemens 5SY44326 supplementary protector worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this 32 A, 4-pole B-curve protector from the 5SY4 series.

How to install a Siemens 5SY4 supplementary protector on a DIN rail?

To install a Siemens 5SY4 supplementary protector, snap it onto a standard 35 mm DIN rail. Ensure the rail is clean and the protector clips engage fully. Connect wires using the screw-clamp terminals, torquing to manufacturer specifications. Always de-energize the circuit 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 b-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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