Siemens Supplementary Protector: 25 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
The SIEMENS IEC Supplementary Protector (SKU 5SY43257, MPN 5SY43257) is a 25 A, C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It is rated for 400V AC and 72V DC, with a maximum…
SKU 3G-OTH-19831
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
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Product Description
The SIEMENS IEC Supplementary Protector (SKU 5SY43257, MPN 5SY43257) is a 25 A, C-Curve, 3-Pole UL1077 DIN Rail-Mount supplementary protector from the 5SY4 series. It is rated for 400V AC and 72V DC, with a maximum AIR rating of 10kA at 400V AC, and features a screw clamp terminal connection.
Frequently Asked Questions
What is the SIEMENS 5SY43257 supplementary protector used for?
The SIEMENS 5SY43257 is a 25 A, C-Curve, 3-pole UL1077 supplementary protector designed to protect branch circuits and control equipment from overloads and short circuits. It is commonly used in industrial control panels, HVAC systems, and machinery across 14 industrial departments, including electrical and power transmission.
What are the specifications of the SIEMENS 5SY43257?
The SIEMENS 5SY43257 is a 25 A, C-Curve, 3-pole supplementary protector from the 5SY4 series. It is rated for 400V AC and 72V DC, with a maximum AIR rating of 10kA at 400V AC. Terminal connection is screw clamp, and it mounts on a DIN rail per UL1077.
Where to buy the SIEMENS 5SY43257 in worldwide?
3G Electric supplies the SIEMENS 5SY43257 supplementary protector to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this and other Siemens circuit protection components.
How to install the SIEMENS 5SY43257 supplementary protector?
Install the SIEMENS 5SY43257 by snapping it onto a standard 35 mm DIN rail. Ensure the circuit is de-energized, then connect phase conductors to the screw clamp terminals using the correct torque specified on the device label. Verify polarity for DC applications and test operation after installation.
Used in
Common applications for SiemensSiemens Products
3G Electric supplies Siemens c-curve, 3-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.
