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Siemens 5SY4125-6
SUP PTOR 1P 25A 240V B-TRIP
Product Description
The Supplementary Protector operates at a rated current of 25 A and is designed for use in AC voltage systems up to 400 V. Featuring a width of 18 mm and a depth of 70 mm, this device adheres to UL1077 standards and is classified under the trip characteristic curve B, making it suitable for various applications including those requiring a rated short-circuit breaking capacity of 10 kA at both 230 V and 400 V.
With a built-in depth of 70 mm, this miniature circuit breaker is constructed for a pollution degree of 3 and an overvoltage category of 3. The device also ensures safe operation in ambient temperatures as low as -40 °C. Its degree of protection is IP20, which allows for reliable usage in controlled environments.
For installation, the device supports a connectable conductor cross-section of 0.75 mm² for both solid-core and multi-wired conductors. The rated insulation voltage is 440 V, and it is equipped for potential additional equipment connections. The Supplementary Protector conforms to UL File E116386 in Volume 1 Section 2, ensuring compliance with relevant safety standards.
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Offer details
- Offer from:
Trusted supplier — Germany, member since 2025, 5–9 employees - Availability:
- 72 pcs.Updated at: 18-09-2026In-Stock
- Warranty:
- 6 months
- Condition:
- Used
Specifications
- Brand
- Siemens
- Voltage type
- AC
- Rated current
- 25 A
- Pollution degree
- 3
- Rated voltage
- 400 V
- Explosion-proof
- Over voltage category
- 3
Available Offers
(5)| Condition | Availability | Supplier | Warranty | Action | |
|---|---|---|---|---|---|
| Condition Used | Availability 72 pcs. Updated at: 18-09-2026In-Stock | SupplierGermanyTrusted supplier — member since 2025, 5–9 employees | Warranty 6 months | |
:fill(white):quality(80)/media/thumbor) | Condition New Factory Sealed | Availability 1 pc. Updated at: 20-09-2026In-Stock | Supplier PolandTrusted supplier — member since 2023, 50–99 employees | Warranty 24 months | |
 | Condition New Surplus | Availability On requestLead time: 15 days | Supplier NetherlandsTrusted supplier — member since 2021, 100–499 employees | 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 5SY4125-6, including specifications and features.
CAD Models
3D CAD model and technical drawings, ready for your design software.
Product data updated: 18-09-2026
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