Siemens Supplementary Protector: 2 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp
The Siemens 5SY4 series IEC supplementary protector (SKU 30XU45) is a D-curve, 1-pole UL1077 DIN rail-mount device rated at 2 A. It features a maximum AIR rating of 10kA at 230/400V AC, an AC voltage rating of…
SKU 3G-OTH-20504
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Product Description
The Siemens 5SY4 series IEC supplementary protector (SKU 30XU45) is a D-curve, 1-pole UL1077 DIN rail-mount device rated at 2 A. It features a maximum AIR rating of 10kA at 230/400V AC, an AC voltage rating of 230/400V AC, and a DC voltage rating of 72V DC, with screw clamp terminals.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the Siemens 5SY41028 supplementary protector used for?
The Siemens 5SY41028 is a D-curve, 1-pole supplementary protector rated at 2 A. It protects industrial control circuits, HVAC equipment, and motor starters from overloads and short circuits. Its D-curve characteristic suits high-inrush loads like transformers and small motors. It mounts on a DIN rail and is UL1077 listed for branch-circuit protection.
What are the specifications of the Siemens 5SY41028?
The Siemens 5SY41028 is a 2 A, 1-pole supplementary protector from the 5SY4 series. It has a D-curve, a maximum AIR rating of 10kA at 230/400V AC, an AC voltage rating of 230/400V AC, and a DC voltage rating of 72V DC. Terminal connection is screw clamp. It is UL1077 listed and DIN rail mountable.
Where to buy the Siemens 5SY41028 worldwide?
3G Electric supplies the Siemens 5SY41028 worldwide. As a global industrial equipment distributor established in 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. We source and deliver this Siemens supplementary protector to any country.
How to install the Siemens 5SY41028 supplementary protector?
Install the Siemens 5SY41028 on a standard 35 mm DIN rail. Ensure the circuit is de-energized. Snap the device onto the rail, then connect the line and load wires to the screw clamp terminals, tightening to the torque specified on the device label. Verify the D-curve matches your load's inrush characteristics before energizing.
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3G Electric supplies Siemens d-curve, 1-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.















