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Siemens Supplementary Protector: 6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp - B-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensB-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp

The Siemens 5SY4 series IEC supplementary protector is a B-curve, 1-pole UL1077 DIN rail-mount device rated at 6 A amps. It provides a maximum AIR rating of 10kA at 230/400V AC and is rated for 72V DC, with screw…

SKU 3G-OTH-21003

Brand
Siemens
Item
Supplementary Protector: 6 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp
Category
B-Curve, 1-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY41066
Series
5SY4
Type
10kA at 230/400V AC, Screw Clamp, 5SY4, B
DC
72V
Curve Type
B
Max. AIR Rating
10kA at 230/400V AC
AC Voltage Rating
230/400V AC
DC Voltage Rating
72V DC
Terminal Connection
Screw Clamp
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens 5SY4 series IEC supplementary protector is a B-curve, 1-pole UL1077 DIN rail-mount device rated at 6 A amps. It provides a maximum AIR rating of 10kA at 230/400V AC and is rated for 72V DC, with screw clamp terminals. This supplementary protector is designed for overcurrent protection in industrial control panels and equipment.

Frequently Asked Questions

What is the Siemens 5SY41066 supplementary protector used for?

The Siemens 5SY41066 is a B-curve, 1-pole supplementary protector rated at 6 A. It provides overcurrent protection for industrial control panels, equipment, and branch circuits. Its UL1077 listing makes it suitable for use in machinery and panelboard applications where branch-circuit protection is not required.

What are the specifications of the Siemens 5SY41066?

The Siemens 5SY41066 is a 6 A, B-curve supplementary protector with a max AIR rating of 10kA at 230/400V AC and a DC voltage rating of 72V DC. It features screw clamp terminals and is DIN rail-mountable. The part number is 5SY41066, part of the 5SY4 series.

Where to buy the Siemens 5SY41066 worldwide?

3G Electric supplies the Siemens 5SY41066 supplementary protector worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this Siemens 5SY4 series device globally.

How to install the Siemens 5SY41066 supplementary protector?

Install the Siemens 5SY41066 on a standard DIN rail. Ensure the circuit is de-energized before wiring. Connect the line and load conductors to the screw clamp terminals, tightening to the torque specified on the device label. The B-curve trips between 3-5 times rated current for fast overcurrent response.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens b-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.

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SIEMENS IEC Supplementary Protector: 25 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, B (MPN 5SY41256). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 230/400V AC; Series: 5SY4; AC Voltage Rating: 230/400V AC; Curve Type: B.
SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, B (MPN 5SY41136). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 230/400V AC; Series: 5SY4; AC Voltage Rating: 230/400V AC; Curve Type: B.
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SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 230/400V AC, Screw Clamp, 5SY4, B (MPN 5SY41136). Key specifications — Brand: SIEMENS; Terminal Connection: Screw Clamp; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 230/400V AC; Series: 5SY4; AC Voltage Rating: 230/400V AC; Curve Type: B.