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Siemens Supplementary Protector: 40 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp - C-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensC-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 40 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp

The Siemens 5SY4 series IEC Supplementary Protector (SKU 30XU57) is a 40 A, C-curve, 1-pole UL1077 DIN rail-mount supplementary protector. It features a screw clamp terminal connection and is rated for 10kA at…

SKU 3G-OTH-19956

Brand
Siemens
Item
Supplementary Protector: 40 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp
Category
C-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY41407
Series
5SY4
Type
10kA at 230/400V AC, Screw Clamp, 5SY4, C
DC
72V
Curve Type
C
Max. AIR Rating
10kA at 230/400V AC
AC Voltage Rating
230/400V 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 5SY4 series IEC Supplementary Protector (SKU 30XU57) is a 40 A, C-curve, 1-pole UL1077 DIN rail-mount supplementary protector. It features a screw clamp terminal connection and is rated for 10kA at 230/400V AC and 72V DC.

Frequently Asked Questions

What is the Siemens 5SY41407 supplementary protector used for?

The Siemens 5SY41407 is a 40 A, C-curve, 1-pole supplementary protector for overcurrent protection in industrial control panels, HVAC equipment, and machinery. It mounts on a DIN rail and meets UL1077 standards for branch circuit protection at 230/400V AC and 72V DC.

What are the specifications of the Siemens 5SY41407?

The Siemens 5SY41407 is rated 40 A, 10kA at 230/400V AC, and 72V DC. It has a C-curve trip characteristic, screw clamp terminals, and is part of the 5SY4 series. It is a 1-pole DIN rail-mount supplementary protector with UL1077 listing.

Where to buy the Siemens 5SY41407 worldwide?

3G Electric supplies the Siemens 5SY41407 supplementary protector worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Siemens components and support procurement across 14 departments.

How to install the Siemens 5SY41407 supplementary protector?

Mount the Siemens 5SY41407 on a 35 mm DIN rail, ensuring it snaps securely. Connect wires to the screw clamp terminals per the torque rating in the datasheet. Verify the system is de-energized before installation and test the C-curve trip response at 40 A.

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, 1-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 230/400V AC, Screw Clamp, 5SY4, C (MPN 5SY41257). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 230/400V AC; Series: 5SY4; AC Voltage Rating: 230/400V AC; Curve Type: C.
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SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, C (MPN 5SY41167). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 230/400V AC; Series: 5SY4; AC Voltage Rating: 230/400V AC; Curve Type: C.
SIEMENS IEC Supplementary Protector: 50 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, C (MPN 5SY41507). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 230/400V AC; Series: 5SY4; AC Voltage Rating: 230/400V AC; Curve Type: C.
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