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Siemens 5SY4440-7

Name: UL1077 Rated Mini Circuit Breaker, 4 Pole, 40A, 480V, Curve C
Brand: Siemens
SKU: 5SY4440-7

UL1077 Rated Mini Circuit Breaker, 4 Pole, 40A, 480V, Curve C

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Product Description

Lifecycle Status:

Introducing the Siemens Supplementary Protector (MPN: 5SY4440-7), an UL1077 rated mini circuit breaker designed for high reliability and performance. This 4-pole, 40A rated device is ideal for applications requiring a trip characteristic of curve C. With a width of 72mm and a depth of 70mm, this compact unit is perfect for space-constrained environments.

The Siemens Supplementary Protector offers a voltage rating of 480V and a current rating of 10kA, ensuring optimal protection against electrical faults. Its UL File E116386 in Vol. 1 Sec. 2 certification further attests to its high-quality construction and safety standards.

This miniature circuit breaker is designed for easy integration into existing systems, with a trip characteristic of curve C that provides precise protection against overcurrent conditions. Its 40A rating ensures efficient power distribution while maintaining safe operating limits.

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Offer details

Offer from:: Trusted supplier — Romania, member since 2023, 1–4 employees
Availability:: On requestLead time: 21 days
Warranty:: Not specified
Condition:: New Surplus

New Surplus - A new, unused, undamaged item without a manufacturer guarantee. The item may come without original packaging or in replacement packaging. If provided, the box may have been opened.

The Seller is responsible for shipping the product and invoicing

Specifications

Brand: Siemens
Voltage type: AC
Rated current: 40 A
Pollution degree: 3
Rated voltage: 400 V
Explosion-proof
Over voltage category: 3

Available Offers

(8)

Condition	Availability	Supplier	Warranty
Condition New Surplus	Availability On requestLead time: 21 days	Supplier RomaniaTrusted supplier — member since 2023, 1–4 employees	Warranty Not specified
Condition New Factory Sealed	Availability 5 pcs. In-Stock Updated at: 31-10-2025	Supplier United KingdomTrusted supplier — member since 2021	Warranty Not specified
Condition Used	Availability 1 pc. In-Stock Updated at: 16-09-2026	Supplier CzechiaTrusted supplier — member since 2021, 50–99 employees	Warranty 24 months
Condition New Factory Sealed	Availability 6 pcs. In-Stock Updated at: 16-09-2026	Supplier PolandTrusted supplier — member since 2023, 50–99 employees	Warranty 24 months
Condition New Surplus	Availability 1 pc. In-Stock Updated at: 16-09-2026	Supplier NetherlandsTrusted supplier — member since 2021, 100–499 employees	Warranty 24 months
Condition Used	Availability 1 pc. In-Stock Updated at: 16-09-2026	Supplier PolandTrusted supplier — member since 2023, 50–99 employees	Warranty 3 months

Offer with manufacturer lead time

Directly from the manufacturer - with a confirmed, predictable, and fully transparent delivery time.

Documents

Data Sheet

Datasheet for Siemens 5SY4440-7, including specifications and features.

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CAD Models

3D CAD model and technical drawings, ready for your design software.

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Product data updated: 22-08-2026

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