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Siemens Supplementary Protector: 25 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp - B-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensB-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 25 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp

The Siemens 5SY4 series IEC supplementary protector is a 25 A, B-curve, 1-pole UL1077 DIN rail-mount device. It is rated for 10kA at 230/400V AC and 72V DC, with screw clamp terminals. This supplementary protector…

SKU 3G-OTH-20900

Brand
Siemens
Item
Supplementary Protector: 25 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp
Category
B-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY41256
Series
5SY4
Type
10kA at 230/400V AC, Screw Clamp, 5SY4, B
DC
72V
Curve Type
B
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 is a 25 A, B-curve, 1-pole UL1077 DIN rail-mount device. It is rated for 10kA at 230/400V AC and 72V DC, with screw clamp terminals. This supplementary protector provides overcurrent protection for industrial equipment.

Frequently Asked Questions

What is the Siemens 5SY41256 supplementary protector used for?

The Siemens 5SY41256 is a 25 A, B-curve, 1-pole UL1077 DIN rail-mount supplementary protector. It provides overcurrent protection for industrial equipment, control panels, and automation systems where branch-circuit protection is not required.

What are the specifications of the Siemens 5SY41256?

The Siemens 5SY41256 is rated 25 A, 10kA at 230/400V AC, 72V DC, with a B-curve trip characteristic. It uses screw clamp terminals and is part of the 5SY4 series. This 1-pole device mounts on a DIN rail and complies with UL1077.

Where to buy the Siemens 5SY41256 worldwide?

3G Electric supplies the Siemens 5SY41256 supplementary protector to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this genuine Siemens part.

How to select the right supplementary protector for industrial equipment?

Select a supplementary protector based on system voltage, current rating, and fault current capacity. For the Siemens 5SY41256, match the 25 A rating to your load, ensure the 10kA interrupting capacity exceeds available fault current, and verify the B-curve suits inductive or resistive loads.

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, 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: 13 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, B (MPN 5SY41136). 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: B.
SIEMENS IEC Supplementary Protector: 25 A Amps, 5kA at 230/400V AC, Screw Clamp, 5SY6, 230/400V AC (MPN 5SY61256). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: Not Rated; Max. AIR Rating: 5kA at 230/400V AC; Series: 5SY6; AC Voltage Rating: 230/400V AC; Curve Type: B.
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