We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
SIEMENS IEC 5SY44045 A-Curve 4-Pole Supplementary Protector - A-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SIEMENS IECA-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protectors

SIEMENS IEC 5SY44045 A-Curve 4-Pole Supplementary Protector

The SIEMENS IEC Supplementary Protector (SKU 5SY44045, MPN 5SY44045) is a 4-pole, A-Curve, DIN rail-mount supplementary protector from the 5SY4 series. It is rated for 4 A amps, with a voltage rating of 72V DC and a…

SKU 3G-OTH-127833

Brand
SIEMENS IEC
Item
5SY44045 A-Curve 4-Pole Supplementary Protector
Category
A-Curve, 4-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 — 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 IEC
Manufacturer Part Number
5SY44045
Type
10kA at 400V AC, Screw Clamp, A
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 5SY44045, MPN 5SY44045) is a 4-pole, A-Curve, DIN rail-mount supplementary protector from the 5SY4 series. It is rated for 4 A amps, with a voltage rating of 72V DC and a breaking capacity of 10kA at 400V AC. The unit features screw clamp terminals and is UL1077 listed.

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 IEC Supplementary Protector 5SY44045 used for?

The SIEMENS IEC Supplementary Protector 5SY44045 is used to protect branch circuits and equipment from overcurrent and short circuits in industrial control panels, HVAC systems, and automation applications. Its A-Curve trip characteristic suits low-level inductive loads and sensitive electronics. It is UL1077 listed for supplementary protection.

What are the specifications of the SIEMENS 5SY44045 supplementary protector?

The SIEMENS 5SY44045 is a 4-pole, A-Curve supplementary protector rated at 4 A amps, 72V DC, with a breaking capacity of 10kA at 400V AC. It features screw clamp terminals and mounts on a DIN rail. It is part of the 5SY4 series and is UL1077 listed.

Where to buy the SIEMENS 5SY44045 supplementary protector worldwide?

You can source the SIEMENS 5SY44045 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 on this UL1077 listed, 4-pole A-Curve protector.

How to install the SIEMENS 5SY44045 supplementary protector?

To install the SIEMENS 5SY44045, snap it onto a standard DIN rail and tighten the screw clamp terminals to the recommended torque. Ensure the circuit is de-energized. The A-Curve trip characteristic requires proper coordination with upstream overcurrent devices. Follow SIEMENS installation guidelines 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

SIEMENS IEC Products

3G Electric supplies SIEMENS IEC a-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 →

Compatible alternatives & equivalents

Cross-referenced by specification & description
A 6 A, A-curve, 4-pole supplementary protector rated 400V AC / 72V DC with a 10kA interrupting capacity at 400V AC. Features screw clamp terminals and is designed for DIN rail mounting per UL1077. Suitable for overcurrent and short-circuit protection in industrial control circuits and automation panels
SIEMENS IEC
A 6 A, A-curve, 4-pole supplementary protector rated 400V AC / 72V DC with a 10kA interrupting capacity at 400V AC. Features screw clamp terminals and is designed for DIN rail mounting per UL1077. Suitable for overcurrent and short-circuit protection in industrial control circuits and automation panels
4-pole supplementary protector with A-Curve trip characteristic, rated 8A, 400V AC and 72V DC. Interrupting capacity 10kA at 400V AC. Screw clamp terminals. For overcurrent protection in control panels, HVAC, and machinery downstream of a listed circuit breaker
SIEMENS IEC
4-pole supplementary protector with A-Curve trip characteristic, rated 8A, 400V AC and 72V DC. Interrupting capacity 10kA at 400V AC. Screw clamp terminals. For overcurrent protection in control panels, HVAC, and machinery downstream of a listed circuit breaker
SIEMENS IEC Supplementary Protector: 2 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, A, 400V AC (MPN 5SY44025)
SIEMENS IEC
SIEMENS IEC Supplementary Protector: 2 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, A, 400V AC (MPN 5SY44025)
This 4-pole supplementary protector from the 5SY4 series features an A-Curve trip characteristic for overcurrent protection in branch circuits. Rated 1A with a 10kA interrupting capacity at 400V AC and 72V DC, it uses screw clamp terminals for secure wiring. Suitable for DIN rail mounting in industrial control panels and machinery
SIEMENS IEC
This 4-pole supplementary protector from the 5SY4 series features an A-Curve trip characteristic for overcurrent protection in branch circuits. Rated 1A with a 10kA interrupting capacity at 400V AC and 72V DC, it uses screw clamp terminals for secure wiring. Suitable for DIN rail mounting in industrial control panels and machinery
This 4-pole supplementary protector is rated 13 A with A-curve tripping characteristic. It is UL1077 listed for 400 V AC (10 kA interrupting capacity) and 72 V DC. Screw clamp terminals facilitate wiring. Typical applications include branch circuit protection in industrial control panels, motor control centers, and automation systems
SIEMENS IEC
This 4-pole supplementary protector is rated 13 A with A-curve tripping characteristic. It is UL1077 listed for 400 V AC (10 kA interrupting capacity) and 72 V DC. Screw clamp terminals facilitate wiring. Typical applications include branch circuit protection in industrial control panels, motor control centers, and automation systems

More from SIEMENS IEC

View all SIEMENS IEC parts →
This 3 A, A-Curve, 4-pole supplementary protector is UL1077 listed for DIN rail mounting. Rated 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC, it features screw clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and control equipment
SIEMENS IEC
This 3 A, A-Curve, 4-pole supplementary protector is UL1077 listed for DIN rail mounting. Rated 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC, it features screw clamp terminals. Suitable for overcurrent and short-circuit protection in branch circuits and control equipment
63 A, 4-pole supplementary protector with A-Curve trip characteristic for overcurrent protection. Rated 400V AC (10kA interrupting capacity) and 72V DC. Screw clamp terminals. UL1077 listed for DIN rail mounting. Suitable for industrial control panels, HVAC equipment, and machinery with resistive or low-inrush loads
SIEMENS IEC
63 A, 4-pole supplementary protector with A-Curve trip characteristic for overcurrent protection. Rated 400V AC (10kA interrupting capacity) and 72V DC. Screw clamp terminals. UL1077 listed for DIN rail mounting. Suitable for industrial control panels, HVAC equipment, and machinery with resistive or low-inrush loads
25 A, A-Curve, 4-pole supplementary protector for overcurrent protection of branch circuits in industrial control panels and equipment. Rated 72V DC, 400V AC with 10kA breaking capacity at 400V AC. Screw clamp terminals. UL1077 listed for DIN rail mounting
SIEMENS IEC
25 A, A-Curve, 4-pole supplementary protector for overcurrent protection of branch circuits in industrial control panels and equipment. Rated 72V DC, 400V AC with 10kA breaking capacity at 400V AC. Screw clamp terminals. UL1077 listed for DIN rail mounting
4-pole supplementary protector with A-Curve trip characteristic, rated 10A, 400V AC / 72V DC, 10kA breaking capacity at 400V AC. Screw clamp terminals. For overcurrent protection in control panels, HVAC, and machinery
SIEMENS IEC
4-pole supplementary protector with A-Curve trip characteristic, rated 10A, 400V AC / 72V DC, 10kA breaking capacity at 400V AC. Screw clamp terminals. For overcurrent protection in control panels, HVAC, and machinery
This 4-pole supplementary protector from the 5SY4 series features an A-curve trip characteristic and is UL1077 listed for DIN rail mounting. Rated 50 A at 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC, it uses screw clamp terminals. Suitable for overcurrent and short-circuit protection in industrial control circuits and panel boards
SIEMENS IEC
This 4-pole supplementary protector from the 5SY4 series features an A-curve trip characteristic and is UL1077 listed for DIN rail mounting. Rated 50 A at 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC, it uses screw clamp terminals. Suitable for overcurrent and short-circuit protection in industrial control circuits and panel boards
20 A, A-curve, 4-pole supplementary protector rated 400 V AC / 72 V DC with 10 kA breaking capacity at 400 V AC. Screw clamp terminals. For DIN rail mounting in branch circuit and equipment overcurrent protection
SIEMENS IEC
20 A, A-curve, 4-pole supplementary protector rated 400 V AC / 72 V DC with 10 kA breaking capacity at 400 V AC. Screw clamp terminals. For DIN rail mounting in branch circuit and equipment overcurrent protection
32 A, A-Curve, 4-pole supplementary protector for DIN rail mounting. Rated 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC. Screw clamp terminals. UL1077 listed. Used for overcurrent and short-circuit protection in control circuits, panel building, and automation systems
SIEMENS IEC
32 A, A-Curve, 4-pole supplementary protector for DIN rail mounting. Rated 400V AC and 72V DC with a breaking capacity of 10kA at 400V AC. Screw clamp terminals. UL1077 listed. Used for overcurrent and short-circuit protection in control circuits, panel building, and automation systems
40 A, A-Curve, 4-pole supplementary protector rated 72V DC and 10kA at 400V AC. Screw clamp terminals. UL1077 listed for DIN rail mounting. Used for overcurrent protection in control panels, HVAC, and machinery
SIEMENS IEC
40 A, A-Curve, 4-pole supplementary protector rated 72V DC and 10kA at 400V AC. Screw clamp terminals. UL1077 listed for DIN rail mounting. Used for overcurrent protection in control panels, HVAC, and machinery