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Siemens 5SY4450-8
UL1077 Rated Mini Circuit Breaker, 4 Pole, 50 Amps, 480 VAC, Trip Characteristic Curve D
Product Description
The SUPPLEMENTARY PROTECTOR,4P,50A,CURVE D is a high-quality miniature circuit breaker designed for industrial applications. This UL1077 rated product offers a 4-pole design with a trip characteristic curve D, making it suitable for various power distribution systems.
With a rating of 50 Amps and 480 VAC, this miniature circuit breaker provides reliable protection against overcurrent conditions. Its compact dimensions of 72mm width and 70mm depth make it easy to install in tight spaces.
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Offer details
- Offer from:
Trusted supplier — United Kingdom, member since 2021 - Availability:
- 5 pcs.Updated at: 31-10-2025In-Stock
- Warranty:
- Not specified
- Condition:
- New Factory Sealed
Specifications
- Brand
- Siemens
- Voltage type
- AC
- Rated current
- 50 A
- Pollution degree
- 3
- Rated voltage
- 400 V
- Explosion-proof
- Over voltage category
- 3
Available Offers
(4)| Condition | Availability | Supplier | Warranty | Action | |
|---|---|---|---|---|---|
 | Condition New Factory Sealed | Availability 5 pcs. Updated at: 31-10-2025In-Stock | SupplierUnited KingdomTrusted supplier — member since 2021 | Warranty Not specified | |
| Condition New Surplus | Availability 1 pc. Updated at: 15-09-2026In-Stock | Supplier GermanyTrusted supplier — member since 2024 | Warranty 24 months | |
| Condition New Factory Sealed | Availability On requestLead time: 15 days | SupplierGermanyTrusted supplier — member since 2024 | Warranty Not specified | |
 | Condition New Factory Sealed | Availability On requestLead time to be confirmed | Supplier ItalyTrusted supplier — member since 2021, 10–19 employees | Warranty 12 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 5SY4450-8, including specifications and features.
CAD Models
3D CAD model and technical drawings, ready for your design software.
Product data updated: 31-10-2025
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