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Siemens Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - D-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensD-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XV44, MPN 5SY43148) is a D-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protector rated at 0.3 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC Voltage…

SKU 3G-OTH-20349

Brand
Siemens
Item
Supplementary Protector: 0.3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
D-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY43148
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 30XV44, MPN 5SY43148) is a D-Curve, 3-Pole UL1077 DIN Rail-Mount Supplementary Protector rated at 0.3 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 5SY43148 supplementary protector used for?

The SIEMENS 5SY43148 is a D-Curve, 3-pole supplementary protector designed to protect sensitive equipment against overcurrents and short circuits in industrial control panels, HVAC systems, and automation applications. It mounts on a DIN rail and is rated for 400V AC and 72V DC circuits.

What are the specifications of the SIEMENS 5SY43148?

The SIEMENS 5SY43148 is a 0.3 A, D-Curve, 3-pole supplementary protector with a max. AIR rating of 10kA at 400V AC. It has an AC voltage rating of 400V AC, a DC voltage rating of 72V DC, and a screw clamp terminal connection. It is part of the 5SY4 series and complies with UL1077.

Where to buy the SIEMENS 5SY43148 worldwide?

You can source the SIEMENS 5SY43148 supplementary protector 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 Siemens 5SY4 series component.

How to install the SIEMENS 5SY43148 supplementary protector?

To install the SIEMENS 5SY43148, snap it onto a standard DIN rail, ensuring the D-Curve trip characteristic matches your load. Connect wires using the screw clamp terminals, torque to manufacturer specifications, and verify the 400V AC or 72V DC system is de-energized before installation. Always 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 d-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: 6 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43068). 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: 63 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43638). 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: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43258). 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: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY43258). 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.