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SIEMENS IEC 5SY42638 D-Curve 2-Pole Supplementary Protector - D-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SIEMENS IECD-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors

SIEMENS IEC 5SY42638 D-Curve 2-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 5SY42638, MPN 5SY42638) is a 63 A, D-curve, 2-pole UL1077 DIN rail-mount supplementary protector from the 5SY4 series. It is rated for 400V AC and 72V DC, with a breaking…

SKU 3G-OTH-127488

Brand
SIEMENS IEC
Item
5SY42638 D-Curve 2-Pole Supplementary Protector
Category
D-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

SIEMENS IEC
Manufacturer Part Number
5SY42638
Type
10kA at 400V AC, Screw Clamp, 5SY4
AC
400V
DC
72V

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SIEMENS IEC Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Supplementary Protector (SKU 5SY42638, MPN 5SY42638) is a 63 A, D-curve, 2-pole UL1077 DIN rail-mount supplementary protector from the 5SY4 series. It is rated for 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC, and features screw-clamp terminals.

Frequently Asked Questions

What is the SIEMENS IEC Supplementary Protector 5SY42638 used for?

The SIEMENS IEC Supplementary Protector 5SY42638 is used to protect branch circuits and equipment from overcurrent and short circuits in industrial control panels, HVAC systems, and machinery. Its D-curve trip characteristic suits high-inrush loads like motors and transformers. It mounts on a DIN rail and is UL1077 listed for supplementary protection.

What are the specifications of the SIEMENS 5SY42638 supplementary protector?

The SIEMENS 5SY42638 is a 2-pole, D-curve supplementary protector rated at 63 A, 400V AC, and 72V DC. It has a breaking capacity of 10kA at 400V AC and uses screw-clamp terminals. It is part of the 5SY4 series and is designed for DIN rail mounting per UL1077.

Where to buy the SIEMENS 5SY42638 supplementary protector worldwide?

You can source the SIEMENS 5SY42638 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; we supply genuine SIEMENS IEC components for industrial applications.

How to install the SIEMENS 5SY42638 supplementary protector?

To install the SIEMENS 5SY42638, snap it onto a standard 35 mm DIN rail. Ensure the circuit is de-energized. Connect wires to the screw-clamp terminals using the correct torque specified by SIEMENS. The D-curve rating means it is suitable for circuits with high inrush currents; verify system voltage does not exceed 400V AC or 72V DC.

Used in

Common applications for SIEMENS IEC
Motor control centers — Siemens 5SY4 D-curve supplementary protectors (e.g., 5SY42108) for motor branch circuit protection
HVAC equipment — A-curve protectors (e.g., 5SY42255) for compressor and fan motor overcurrent protection
Industrial conveyor systems — 4-pole D-curve protectors (e.g., 5SY44168) for three-phase motor protection with neutral
Pump control panels — 2-pole supplementary protectors (e.g., 5SY42038) for single-phase pump motor protection
Machine tool control circuits — A-curve protectors (e.g., 5SY44155) for solenoid valve and relay protection
Power distribution sub-panels — 4-pole protectors (e.g., 5SY44155) for three-phase branch circuit protection in light industrial settings

SIEMENS IEC Products

3G Electric supplies SIEMENS IEC d-curve, 2-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
SIEMENS IEC Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42258)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42258)
SIEMENS IEC Supplementary Protector: 1 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42018)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 1 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42018)
SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42168)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42168)
SIEMENS IEC Supplementary Protector: 4 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42048)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 4 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42048)
SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42038)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 3 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42038)
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42108)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42108)

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D-curve, 2-pole supplementary protector rated 50 A, 400 V AC / 72 V DC, with 10 kA breaking capacity at 400 V AC. Screw-clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and equipment, particularly where high inrush currents occur
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D-curve, 2-pole supplementary protector rated 50 A, 400 V AC / 72 V DC, with 10 kA breaking capacity at 400 V AC. Screw-clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and equipment, particularly where high inrush currents occur
This 2-pole supplementary protector features a D-curve trip characteristic for high-inrush loads. Rated 13 A, 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC. Screw clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and equipment
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This 2-pole supplementary protector features a D-curve trip characteristic for high-inrush loads. Rated 13 A, 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC. Screw clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and equipment
D-curve, 2-pole supplementary protector rated 1.6 A, 400 V AC (10 kA breaking capacity) and 72 V DC. Features screw clamp terminals and DIN rail mounting. Suitable for overcurrent protection in control panels, HVAC, and machinery where high inrush currents occur
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D-curve, 2-pole supplementary protector rated 1.6 A, 400 V AC (10 kA breaking capacity) and 72 V DC. Features screw clamp terminals and DIN rail mounting. Suitable for overcurrent protection in control panels, HVAC, and machinery where high inrush currents occur
This 20 A, D-curve, 2-pole supplementary protector is rated for 400V AC with a breaking capacity of 10kA at 400V AC and 72V DC. It features screw-clamp terminals and is designed for DIN-rail mounting. Suitable for overcurrent and short-circuit protection in industrial control circuits, HVAC equipment, and motor branch circuits
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This 20 A, D-curve, 2-pole supplementary protector is rated for 400V AC with a breaking capacity of 10kA at 400V AC and 72V DC. It features screw-clamp terminals and is designed for DIN-rail mounting. Suitable for overcurrent and short-circuit protection in industrial control circuits, HVAC equipment, and motor branch circuits
SIEMENS IEC Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42328)
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SIEMENS IEC Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42328)
SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42408)
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SIEMENS IEC Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42408)
SIEMENS IEC Supplementary Protector: 8 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42088)
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SIEMENS IEC Supplementary Protector: 8 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42088)
SIEMENS IEC Supplementary Protector: 2 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42028)
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SIEMENS IEC Supplementary Protector: 2 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42028)