Siemens Supplementary Protector: 45 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
The Siemens 5SY4 series IEC Supplementary Protector (SKU 3G-OTH-21165) is a C-curve, 2-pole UL1077 DIN rail-mount supplementary protector rated at 45 A. It features a maximum AIR rating of 10 kA at 400 V AC, AC…
SKU 3G-OTH-21165
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 5SY4 series IEC Supplementary Protector (SKU 3G-OTH-21165) is a C-curve, 2-pole UL1077 DIN rail-mount supplementary protector rated at 45 A. It features a maximum AIR rating of 10 kA at 400 V AC, AC voltage rating of 400 V AC, and DC voltage rating of 72 V DC, with screw clamp terminals.
Frequently Asked Questions
What is the Siemens 5SY42457 supplementary protector used for?
The Siemens 5SY42457 is a C-curve, 2-pole UL1077 DIN rail-mount supplementary protector rated at 45 A. It protects industrial control circuits, HVAC equipment, and motor starters from overcurrents and short circuits in panel boards and machinery across 14 industrial departments.
What are the specifications of the Siemens 5SY42457?
The Siemens 5SY42457 is a 45 A, 2-pole supplementary protector with a C-curve, rated 400V AC and 72V DC. It has a maximum AIR rating of 10kA at 400V AC and uses screw clamp terminals. It is part of the 5SY4 series and complies with UL1077.
Where to buy the Siemens 5SY42457 worldwide?
3G Electric supplies the Siemens 5SY42457 supplementary protector worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this and other Siemens circuit protection components.
How to install the Siemens 5SY42457 on a DIN rail?
To install the Siemens 5SY42457, snap it onto a standard 35 mm DIN rail. Ensure the rail is clean and the protector is oriented correctly. Tighten the screw clamp terminals to the manufacturer's recommended torque. Always de-energize the circuit before installation and follow local electrical codes.
Used in
Common applications for SiemensSiemens Products
3G Electric supplies Siemens c-curve, 2-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.
