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Siemens 5SY4 D-Curve 1-Pole UL1077 Supplementary Protector - D-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensD-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens 5SY4 D-Curve 1-Pole UL1077 Supplementary Protector

The Siemens 5SY4 series IEC supplementary protector is a 25 A, D-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-20468

Brand
Siemens
Item
5SY4 D-Curve 1-Pole UL1077 Supplementary Protector
Category
D-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Siemens
Manufacturer Part Number
5SY41258
Series
5SY4
Type
10kA at 230/400V AC, Screw Clamp, 5SY4, D
DC
72V
Curve Type
D
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, D-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 control circuits and equipment.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Siemens 5SY41258 supplementary protector used for?

The Siemens 5SY41258 is a 25 A, D-curve supplementary protector used for overcurrent protection in industrial control circuits and equipment. It is commonly applied in panel building, machine control, and automation systems where branch-circuit protection is not required but component safeguarding is needed.

What are the specifications of the Siemens 5SY41258?

The Siemens 5SY41258 is a 1-pole, D-curve supplementary protector rated 25 A, 10kA at 230/400V AC, and 72V DC. It features screw-clamp terminals and mounts on a DIN rail. This UL1077 device is part of the Siemens 5SY4 series, designed for industrial overcurrent protection.

Where to buy the Siemens 5SY41258 worldwide?

You can source the Siemens 5SY41258 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; we supply genuine Siemens supplementary protectors to industrial buyers globally.

How to install the Siemens 5SY41258 supplementary protector?

Install the Siemens 5SY41258 by snapping it onto a 35 mm DIN rail. Ensure the circuit is de-energized. Connect wires to the screw-clamp terminals using the specified torque. The D-curve trips between 10x and 20x rated current, suitable for high-inrush loads. Follow Siemens installation guidelines for safe operation.

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, 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve for high inrush immunity, rated 20A with a maximum AIR of 10kA at 230/400V AC and 72V DC. It uses screw clamp terminals and mounts on DIN rail, suitable for overcurrent and short-circuit protection in industrial control circuits, lighting, and small motor loads
Siemens
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve for high inrush immunity, rated 20A with a maximum AIR of 10kA at 230/400V AC and 72V DC. It uses screw clamp terminals and mounts on DIN rail, suitable for overcurrent and short-circuit protection in industrial control circuits, lighting, and small motor loads
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve characteristic for high-inrush loads such as transformers and small motors. Rated at 2 A with a maximum interrupting rating of 10kA at 230/400V AC and 72V DC, it uses screw clamp terminals for secure wiring. The device mounts on a DIN rail and is UL1077 listed for branch-circuit protection in industrial control circuits, HVAC equipment, and motor starters
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This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve characteristic for high-inrush loads such as transformers and small motors. Rated at 2 A with a maximum interrupting rating of 10kA at 230/400V AC and 72V DC, it uses screw clamp terminals for secure wiring. The device mounts on a DIN rail and is UL1077 listed for branch-circuit protection in industrial control circuits, HVAC equipment, and motor starters
DIN rail-mount supplementary protector with D-curve tripping characteristic for overcurrent protection in industrial control panels, HVAC equipment, and machinery. Rated 32 A, 10kA at 230/400V AC, 72V DC. Screw clamp terminals. UL1077 listed
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DIN rail-mount supplementary protector with D-curve tripping characteristic for overcurrent protection in industrial control panels, HVAC equipment, and machinery. Rated 32 A, 10kA at 230/400V AC, 72V DC. Screw clamp terminals. UL1077 listed
This 1-pole supplementary protector features a D-curve trip characteristic for high inrush currents, rated 16A with AC voltage 230/400V and DC voltage 72V. It has a maximum interrupting rating of 10kA at 230/400V AC and uses screw clamp terminals. Designed for DIN rail mounting, it is suitable for overcurrent and short-circuit protection in control circuits and equipment
Siemens
This 1-pole supplementary protector features a D-curve trip characteristic for high inrush currents, rated 16A with AC voltage 230/400V and DC voltage 72V. It has a maximum interrupting rating of 10kA at 230/400V AC and uses screw clamp terminals. Designed for DIN rail mounting, it is suitable for overcurrent and short-circuit protection in control circuits and equipment
D-curve, 1-pole supplementary protector rated 3 A with screw clamp terminals. Provides overcurrent protection for branch circuits and equipment in industrial control panels, HVAC systems, and lighting applications. Suitable for high-inrush loads such as motors and transformers. AC voltage rating 230/400V AC, DC voltage rating 72V DC, interrupting rating 10kA at 230/400V AC
Siemens
D-curve, 1-pole supplementary protector rated 3 A with screw clamp terminals. Provides overcurrent protection for branch circuits and equipment in industrial control panels, HVAC systems, and lighting applications. Suitable for high-inrush loads such as motors and transformers. AC voltage rating 230/400V AC, DC voltage rating 72V DC, interrupting rating 10kA at 230/400V AC
This 1-pole supplementary protector features a D-curve for high-inrush loads. Rated 50A, it provides 10kA interrupting capacity at 230/400V AC and 72V DC. Suitable for branch circuit protection in control panels, HVAC, and machinery. Terminal connection via screw clamp
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This 1-pole supplementary protector features a D-curve for high-inrush loads. Rated 50A, it provides 10kA interrupting capacity at 230/400V AC and 72V DC. Suitable for branch circuit protection in control panels, HVAC, and machinery. Terminal connection via screw clamp

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Siemens 5SY4 series supplementary protector, 1-pole, D-curve, rated 6 A. Provides overcurrent protection with a maximum AIR rating of 10kA at 230/400V AC and 72V DC. Features screw clamp terminals and mounts on DIN rail. Suitable for industrial control panels and equipment with high inrush currents
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Siemens 5SY4 series supplementary protector, 1-pole, D-curve, rated 6 A. Provides overcurrent protection with a maximum AIR rating of 10kA at 230/400V AC and 72V DC. Features screw clamp terminals and mounts on DIN rail. Suitable for industrial control panels and equipment with high inrush currents
D-curve, 1-pole supplementary protector rated 0.5 A, 230/400V AC and 72V DC, with 10kA interrupting capacity. Screw clamp terminals. For overcurrent protection in control circuits, instrumentation, and automation equipment
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D-curve, 1-pole supplementary protector rated 0.5 A, 230/400V AC and 72V DC, with 10kA interrupting capacity. Screw clamp terminals. For overcurrent protection in control circuits, instrumentation, and automation equipment
This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve trip characteristic and a rated current of 1 A. It is designed for DIN rail mounting and provides overcurrent protection with a maximum interrupting rating of 10 kA at 230/400 V AC and a DC voltage rating of 72 V. The screw clamp terminals facilitate secure wiring connections in control panels and industrial equipment
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This 1-pole supplementary protector from the Siemens 5SY4 series features a D-curve trip characteristic and a rated current of 1 A. It is designed for DIN rail mounting and provides overcurrent protection with a maximum interrupting rating of 10 kA at 230/400 V AC and a DC voltage rating of 72 V. The screw clamp terminals facilitate secure wiring connections in control panels and industrial equipment
DIN rail-mount supplementary protector with D-curve characteristic for overcurrent and short-circuit protection. Rated 0.3 A, 230/400V AC (10kA interrupting capacity) and 72V DC. Screw clamp terminals. Suitable for use in control panels, HVAC systems, and machinery
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DIN rail-mount supplementary protector with D-curve characteristic for overcurrent and short-circuit protection. Rated 0.3 A, 230/400V AC (10kA interrupting capacity) and 72V DC. Screw clamp terminals. Suitable for use in control panels, HVAC systems, and machinery
This 1-pole supplementary protector with D-curve characteristic is rated 40A, 72V DC, and 10kA at 230/400V AC. It features screw clamp terminals and mounts on DIN rail. Suitable for overcurrent and short-circuit protection in branch circuits and equipment, commonly used in control panels and machinery
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This 1-pole supplementary protector with D-curve characteristic is rated 40A, 72V DC, and 10kA at 230/400V AC. It features screw clamp terminals and mounts on DIN rail. Suitable for overcurrent and short-circuit protection in branch circuits and equipment, commonly used in control panels and machinery
1-pole D-curve supplementary protector rated 13A, 230/400V AC and 72V DC, with 10kA interrupting capacity at 230/400V AC. Screw clamp terminals. Suitable for branch circuit and equipment protection in control panels, HVAC, and automation systems where high inrush loads occur
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1-pole D-curve supplementary protector rated 13A, 230/400V AC and 72V DC, with 10kA interrupting capacity at 230/400V AC. Screw clamp terminals. Suitable for branch circuit and equipment protection in control panels, HVAC, and automation systems where high inrush loads occur
This 1-pole supplementary protector features a D-curve trip characteristic and a rated current of 1.6 A. It is designed for DIN rail mounting and uses screw clamp terminals. The device is rated for 10kA at 230/400V AC and 72V DC, suitable for protecting industrial control circuits, HVAC equipment, and motor branch circuits against overloads and short circuits
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This 1-pole supplementary protector features a D-curve trip characteristic and a rated current of 1.6 A. It is designed for DIN rail mounting and uses screw clamp terminals. The device is rated for 10kA at 230/400V AC and 72V DC, suitable for protecting industrial control circuits, HVAC equipment, and motor branch circuits against overloads and short circuits
1-pole DIN rail-mount supplementary protector with D-curve characteristic, rated 4A. Suitable for overload and short-circuit protection in industrial control circuits, HVAC equipment, and panelboards. AC voltage rating 230/400V, DC voltage rating 72V. Maximum interrupting capacity 10kA at 230/400V AC. Screw clamp terminals. UL1077 listed
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1-pole DIN rail-mount supplementary protector with D-curve characteristic, rated 4A. Suitable for overload and short-circuit protection in industrial control circuits, HVAC equipment, and panelboards. AC voltage rating 230/400V, DC voltage rating 72V. Maximum interrupting capacity 10kA at 230/400V AC. Screw clamp terminals. UL1077 listed