Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
Siemens Supplementary Protector: 1.6 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: 1.6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS 5SY4 series IEC Supplementary Protector (SKU 30XW07) is a C-curve, 4-pole UL1077 DIN rail-mount supplementary protector rated at 1.6 A amps. It features a maximum AIR rating of 10kA at 400V AC and a DC…

SKU 3G-OTH-20161

Brand
Siemens
Item
Supplementary Protector: 1.6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
C-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Siemens
Manufacturer Part Number
5SY44157
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
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The SIEMENS 5SY4 series IEC Supplementary Protector (SKU 30XW07) is a C-curve, 4-pole UL1077 DIN rail-mount supplementary protector rated at 1.6 A amps. It features a maximum AIR rating of 10kA at 400V AC and a DC voltage rating of 72V DC, with screw clamp terminal connections. This SIEMENS-branded device (MPN 5SY44157) is designed for overcurrent protection in industrial control panels and equipment.

Frequently Asked Questions

What is the SIEMENS 5SY44157 supplementary protector used for?

The SIEMENS 5SY44157 is a C-curve, 4-pole supplementary protector rated at 1.6 A amps. It provides overcurrent protection in industrial control panels and equipment, with a maximum AIR rating of 10kA at 400V AC and a DC voltage rating of 72V DC.

What are the specifications of the SIEMENS 5SY44157?

The SIEMENS 5SY44157 is a 4-pole supplementary protector with a C-curve, rated at 1.6 A amps. It has a DC voltage rating of 72V DC, a maximum AIR rating of 10kA at 400V AC, and screw clamp terminal connections. It is part of the 5SY4 series and is UL1077 listed.

Where to buy the SIEMENS 5SY44157 worldwide?

You can source the SIEMENS 5SY44157 from 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 supplementary protector.

How to install the SIEMENS 5SY44157 supplementary protector?

Install the SIEMENS 5SY44157 on a DIN rail in a suitable enclosure. Ensure the circuit is de-energized, then snap the device onto the rail. Connect wires using the screw clamp terminals, tightening to the manufacturer's recommended torque. 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, 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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
SIEMENS IEC Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44147). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44147). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44407). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44407). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44327). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44327). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 50 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44507). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 50 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44507). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 2 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44027). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 2 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44027). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 1 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44017). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 1 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44017). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.

More from Siemens

View all Siemens parts →
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44107). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44107). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 4 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44047). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 4 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44047). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44137). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44137). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44167). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44167). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44637). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44637). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44257). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44257). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 20 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44207). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 20 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44207). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44037). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, C, 400V AC (MPN 5SY44037). Key specifications — Series: 5SY4; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Terminal Connection: Screw Clamp; Brand: SIEMENS.