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Siemens Supplementary Protector: 45 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 45 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XV64, MPN 5SY43457) is a C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector rated at 45 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC Voltage…

SKU 3G-OTH-19844

Brand
Siemens
Item
Supplementary Protector: 45 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
C-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY43457
Series
5SY4
Type
10kA at 400V AC, Screw Clamp, 5SY4
AC
400V
DC
72V
Max. AIR Rating
10kA at 400V AC
AC Voltage Rating
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 30XV64, MPN 5SY43457) is a C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector rated at 45 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC Voltage Rating of 400V AC, and DC Voltage Rating of 72V DC, with a Screw Clamp terminal connection from the 5SY4 series.

Frequently Asked Questions

What is the SIEMENS 5SY43457 supplementary protector used for?

The SIEMENS 5SY43457 is a C-Curve, 3-pole UL1077 supplementary protector rated at 45 A Amps. It protects branch circuits and equipment from overloads and short circuits in industrial control panels, HVAC systems, and machinery across 14 industrial departments.

What are the specifications of the SIEMENS 5SY43457?

The SIEMENS 5SY43457 is rated 45 A Amps, 400V AC, 72V DC, with a max. AIR rating of 10kA at 400V AC. It features a screw clamp terminal connection, C-Curve trip characteristic, and 3-pole DIN rail mount design from the 5SY4 series.

Where to buy the SIEMENS 5SY43457 worldwide?

3G Electric supplies the SIEMENS 5SY43457 supplementary protector worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this 45 A, 400V AC unit.

How to install the SIEMENS 5SY43457 supplementary protector?

Install the SIEMENS 5SY43457 on a standard DIN rail in a suitable enclosure. Ensure the supply is de-energized, then snap the 3-pole unit onto the rail. Connect conductors to the screw clamp terminals per the torque specs in the datasheet. Verify voltage ratings (400V AC / 72V DC) before energizing.

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, 3-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: 15 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43187). Key specifications — Terminal Connection: Screw Clamp; Series: 5SY4; AC Voltage Rating: 400V AC; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43037). Key specifications — Terminal Connection: Screw Clamp; Series: 5SY4; AC Voltage Rating: 400V AC; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 80 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43807). Key specifications — Terminal Connection: Screw Clamp; Series: 5SY4; AC Voltage Rating: 400V AC; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 80 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43807). Key specifications — Terminal Connection: Screw Clamp; Series: 5SY4; AC Voltage Rating: 400V AC; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Brand: SIEMENS.