Siemens Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
The SIEMENS IEC Supplementary Protector (SKU 5SY44166, MPN 5SY44166) is a B-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protector from the 5SY4 series. It is rated for 16 A Amps with a Max. AIR Rating of 10kA…
SKU 3G-OTH-21677
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 5SY44166, MPN 5SY44166) is a B-Curve, 4-Pole UL1077 DIN Rail-Mount Supplementary Protector from the 5SY4 series. It is rated for 16 A Amps with a Max. AIR Rating of 10kA at 400V AC and a DC Voltage Rating of 72V DC. The unit features a Screw Clamp terminal connection.
Frequently Asked Questions
What is the SIEMENS 5SY44166 supplementary protector used for?
The SIEMENS 5SY44166 is a B-curve, 4-pole supplementary protector designed to protect branch circuits and sensitive equipment from overcurrent and short circuits. It is commonly used in industrial control panels, HVAC systems, and automation applications where DIN-rail mounting and UL1077 compliance are required.
What are the specifications of the SIEMENS 5SY44166?
The SIEMENS 5SY44166 is rated for 16 A amps, 400V AC and 72V DC, with a maximum AIR rating of 10kA at 400V AC. It features a B-curve trip characteristic, screw clamp terminals, and is a 4-pole DIN-rail mount supplementary protector from the 5SY4 series.
Where to buy the SIEMENS 5SY44166 worldwide?
3G Electric supplies the SIEMENS 5SY44166 supplementary protector to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this genuine Siemens part.
How to install the SIEMENS 5SY44166 supplementary protector?
Install the SIEMENS 5SY44166 by snapping it onto a standard DIN rail. Ensure the circuit is de-energized before wiring. Connect conductors to the screw clamp terminals per the torque specifications in the datasheet. Verify the B-curve matches your load type for proper overcurrent protection.
Used in
Common applications for SiemensSiemens Products
3G Electric supplies Siemens b-curve, 4-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.
