Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

SIEMENS IEC 5SY42168 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 5SY42168 D-Curve 2-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 5SY42168, MPN 5SY42168) is a D-curve, 2-pole UL1077 DIN rail-mount supplementary protector rated at 16 A amps. It features a voltage rating of 400V AC and 72V DC, with a…

SKU 3G-OTH-127435

Brand
SIEMENS IEC
Item
5SY42168 D-Curve 2-Pole Supplementary Protector
Category
D-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

SIEMENS IEC
Manufacturer Part Number
5SY42168
Type
10kA at 400V AC, Screw Clamp, 5SY4
AC
400V
DC
72V

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The SIEMENS IEC Supplementary Protector (SKU 5SY42168, MPN 5SY42168) is a D-curve, 2-pole UL1077 DIN rail-mount supplementary protector rated at 16 A amps. It features a voltage rating of 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC. The unit uses screw clamp terminals and is part of the 5SY4 series from SIEMENS.

Frequently Asked Questions

What is the SIEMENS IEC Supplementary Protector 5SY42168 used for?

The SIEMENS IEC Supplementary Protector 5SY42168 is used to protect branch circuits and equipment from overcurrent and short circuits in industrial control panels, HVAC systems, and automation applications. Its D-curve trip characteristic makes it suitable for loads with high inrush currents, such as motors and transformers.

What are the specifications of the SIEMENS 5SY42168 supplementary protector?

The SIEMENS 5SY42168 is a 2-pole, D-curve supplementary protector rated at 16 A amps. It has a voltage rating of 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC. It uses screw clamp terminals and is UL1077 listed for DIN rail mounting. It is part of the SIEMENS 5SY4 series.

Where to buy the SIEMENS 5SY42168 supplementary protector worldwide?

You can source the SIEMENS 5SY42168 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 provide competitive pricing and reliable sourcing for this SIEMENS 5SY4 series component.

How to install the SIEMENS 5SY42168 supplementary protector?

To install the SIEMENS 5SY42168, mount it onto a standard DIN rail and secure it using the integrated clip. Connect wires to the screw clamp terminals, tightening to the torque specified in the datasheet. Ensure the circuit is de-energized before installation. Follow local electrical codes and the manufacturer's instructions for proper operation.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
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
SIEMENS IEC
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
This D-curve, 2-pole supplementary protector is rated at 1 A with a voltage rating of 400V AC and 72V DC. It has a breaking capacity of 10kA at 400V AC and features a screw-clamp connection. Suitable for protecting branch circuits and equipment in industrial control panels, HVAC systems, and automation applications where high inrush currents occur
SIEMENS IEC
This D-curve, 2-pole supplementary protector is rated at 1 A with a voltage rating of 400V AC and 72V DC. It has a breaking capacity of 10kA at 400V AC and features a screw-clamp connection. Suitable for protecting branch circuits and equipment in industrial control panels, HVAC systems, and automation applications where high inrush currents occur
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
SIEMENS IEC
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
SIEMENS IEC
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
D-curve, 2-pole supplementary protector rated at 3 A, 400 V AC and 72 V DC with a breaking capacity of 10 kA at 400 V AC. Features screw clamp terminals and is designed for DIN rail mounting. Suitable for overcurrent protection in industrial control circuits and applications with high inrush currents such as motors and transformers
SIEMENS IEC
D-curve, 2-pole supplementary protector rated at 3 A, 400 V AC and 72 V DC with a breaking capacity of 10 kA at 400 V AC. Features screw clamp terminals and is designed for DIN rail mounting. Suitable for overcurrent protection in industrial control circuits and applications with high inrush currents such as motors and transformers
D-curve, 2-pole supplementary protector rated 10 A, 400V AC with 10kA interrupting capacity at 400V AC, and 72V DC. Features screw-clamp terminals and DIN rail mount per UL1077. Suitable for overcurrent and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and automation applications
SIEMENS IEC
D-curve, 2-pole supplementary protector rated 10 A, 400V AC with 10kA interrupting capacity at 400V AC, and 72V DC. Features screw-clamp terminals and DIN rail mount per UL1077. Suitable for overcurrent and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and automation applications

More from SIEMENS IEC

View all SIEMENS IEC parts
D-curve, 2-pole supplementary protector rated 32 A, 400V AC (10kA breaking capacity) and 72V DC. UL1077 listed for DIN rail mounting with screw clamp terminals. Suitable for overcurrent protection in industrial control panels and equipment
SIEMENS IEC
D-curve, 2-pole supplementary protector rated 32 A, 400V AC (10kA breaking capacity) and 72V DC. UL1077 listed for DIN rail mounting with screw clamp terminals. Suitable for overcurrent protection in industrial control panels and equipment
This 2-pole supplementary protector from the 5SY4 series features a D-curve trip characteristic and a rated current of 40 A. It is designed for DIN rail mounting and uses screw-clamp terminals. With a breaking capacity of 10 kA at 400 V AC and suitability for 72 V DC, it provides overload and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and machinery
SIEMENS IEC
This 2-pole supplementary protector from the 5SY4 series features a D-curve trip characteristic and a rated current of 40 A. It is designed for DIN rail mounting and uses screw-clamp terminals. With a breaking capacity of 10 kA at 400 V AC and suitability for 72 V DC, it provides overload and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and machinery
D-curve, 2-pole supplementary protector rated 8 A, 400 V AC / 72 V DC, with 10 kA breaking capacity at 400 V AC. UL1077 listed for overcurrent and short-circuit protection of control circuits and equipment. Screw clamp terminals for secure wiring. DIN rail mount
SIEMENS IEC
D-curve, 2-pole supplementary protector rated 8 A, 400 V AC / 72 V DC, with 10 kA breaking capacity at 400 V AC. UL1077 listed for overcurrent and short-circuit protection of control circuits and equipment. Screw clamp terminals for secure wiring. DIN rail mount
The SIEMENS 5SY42028 is a 2-pole, D-curve supplementary protector rated 2A at 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC. It features screw-clamp terminals and is UL1077 listed for DIN rail mounting. This protector is used for overload and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and machinery
SIEMENS IEC
The SIEMENS 5SY42028 is a 2-pole, D-curve supplementary protector rated 2A at 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC. It features screw-clamp terminals and is UL1077 listed for DIN rail mounting. This protector is used for overload and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and machinery
D-curve, 2-pole supplementary protector rated 0.5 A, 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC. Screw clamp connection. DIN rail mount per UL1077. Suitable for overcurrent and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and machinery
SIEMENS IEC
D-curve, 2-pole supplementary protector rated 0.5 A, 400V AC and 72V DC, with a breaking capacity of 10kA at 400V AC. Screw clamp connection. DIN rail mount per UL1077. Suitable for overcurrent and short-circuit protection in branch circuits and equipment within industrial control panels, HVAC systems, and machinery
D-curve, 2-pole UL1077 supplementary protector rated 0.3 A. Screw clamp terminals. Rated 400V AC with 10kA breaking capacity, 72V DC. For overcurrent protection in industrial control circuits, automation panels, and machinery
SIEMENS IEC
D-curve, 2-pole UL1077 supplementary protector rated 0.3 A. Screw clamp terminals. Rated 400V AC with 10kA breaking capacity, 72V DC. For overcurrent protection in industrial control circuits, automation panels, and machinery
D-curve, 2-pole UL1077 supplementary protector rated 6 A. Operates at 400V AC with 10kA breaking capacity and 72V DC. Screw-clamp terminals. Provides overcurrent protection for branch circuits and equipment in industrial control panels
SIEMENS IEC
D-curve, 2-pole UL1077 supplementary protector rated 6 A. Operates at 400V AC with 10kA breaking capacity and 72V DC. Screw-clamp terminals. Provides overcurrent protection for branch circuits and equipment in industrial control panels
25 A, D-curve, 2-pole supplementary protector rated 400V AC and 72V DC with 10kA breaking capacity at 400V AC. Screw clamp terminals. For DIN rail mounting. Used in industrial control circuits, HVAC equipment, and motor starters to protect against overcurrents and short circuits, suitable for loads with high inrush currents such as transformers and solenoid valves
SIEMENS IEC
25 A, D-curve, 2-pole supplementary protector rated 400V AC and 72V DC with 10kA breaking capacity at 400V AC. Screw clamp terminals. For DIN rail mounting. Used in industrial control circuits, HVAC equipment, and motor starters to protect against overcurrents and short circuits, suitable for loads with high inrush currents such as transformers and solenoid valves