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Siemens Supplementary Protector: 6 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: 6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XV89, MPN 5SY44066) is a B-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 6 A Amps. It features a maximum AIR rating of 10kA…

SKU 3G-OTH-21667

Brand
Siemens
Item
Supplementary Protector: 6 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
5SY44066
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
View Full Spec Sheet

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

Product Description

The SIEMENS IEC Supplementary Protector (SKU 30XV89, MPN 5SY44066) is a B-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series, rated at 6 A Amps. It features a maximum AIR rating of 10kA at 400V AC, a DC voltage rating of 72V DC, and screw clamp terminal connections.

Frequently Asked Questions

What is the SIEMENS 5SY44066 supplementary protector used for?

The SIEMENS 5SY44066 is a B-curve, 4-pole supplementary protector rated at 6 A. It protects branch circuits and sensitive equipment against overloads and short circuits in industrial control panels, HVAC systems, and automation applications. Its UL1077 listing makes it suitable for use in North American and global installations.

What are the specifications of the SIEMENS 5SY44066?

The SIEMENS 5SY44066 is a 6 A, B-curve, 4-pole supplementary protector from the 5SY4 series. It has a maximum AIR rating of 10kA at 400V AC, a DC voltage rating of 72V DC, and screw clamp terminals. It is UL1077 listed and mounts on a standard DIN rail.

Where to buy the SIEMENS 5SY44066 worldwide?

You can source the SIEMENS 5SY44066 (MPN 5SY44066) 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; we supply genuine Siemens components to industrial buyers globally.

How to install the SIEMENS 5SY44066 supplementary protector?

Install the SIEMENS 5SY44066 by snapping it onto a 35 mm DIN rail. Ensure the circuit is de-energized. Connect wires to the screw clamp terminals per the torque specifications on the device label. Use appropriate wire gauge for 6 A. Follow local electrical codes and the manufacturer's installation manual for safe operation.

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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SIEMENS IEC Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, B, 400V AC (MPN 5SY44256). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
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