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

3G Electric
SIEMENS IEC 5SY44048 D-Curve 4-Pole Supplementary Protector - D-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SIEMENS IECD-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors

SIEMENS IEC 5SY44048 D-Curve 4-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 5SY44048, MPN 5SY44048) is a D-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector rated at 4 A Amps. It features a 72V DC rating and a breaking capacity of 10kA…

SKU 3G-OTH-154300

Brand
SIEMENS IEC
Item
5SY44048 D-Curve 4-Pole Supplementary Protector
Part Number
5SY44048
Category
D-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
Available to Order
Also known as:5SY44048SIEMENS IEC
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
5SY44048
Type
10kA at 400V AC, Screw Clamp, D
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 5SY44048, MPN 5SY44048) is a D-Curve, 4-Pole UL1077 DIN Rail-Mount supplementary protector rated at 4 A Amps. It features a 72V DC rating and a breaking capacity of 10kA at 400V AC, with Screw Clamp terminals. This model is part of the SIEMENS 5SY4 series.

Frequently Asked Questions

What is the SIEMENS IEC Supplementary Protector 5SY44048 used for?

The SIEMENS 5SY44048 is a D-curve, 4-pole supplementary protector rated at 4 A and 72V DC. It protects sensitive equipment against overloads and short circuits in industrial control panels, HVAC systems, and automation applications. Its UL1077 listing makes it suitable for branch-circuit protection in North American installations.

What are the specifications of the SIEMENS 5SY44048 supplementary protector?

The SIEMENS 5SY44048 is a 4 A, D-curve, 4-pole supplementary protector with a 72V DC rating and a breaking capacity of 10kA at 400V AC. It uses screw-clamp terminals and is part of the 5SY4 series. It mounts on a DIN rail and is UL1077 listed for industrial use.

Where to buy the SIEMENS 5SY44048 supplementary protector worldwide?

3G Electric supplies the SIEMENS 5SY44048 supplementary protector worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. We source genuine SIEMENS components for industrial applications.

How to install the SIEMENS 5SY44048 supplementary protector?

Install the SIEMENS 5SY44048 on a standard DIN rail by snapping it into place. Connect wires to the screw-clamp terminals using a screwdriver, ensuring torque meets SIEMENS specifications. Verify the system is de-energized before installation. Follow local electrical codes and the manufacturer's instructions for safe 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
Not sure this is the right part? Photo-identify it

SIEMENS IEC Products

3G Electric supplies SIEMENS IEC d-curve, 4-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

More from SIEMENS IEC

View all SIEMENS IEC parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first