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Siemens Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp - B-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
SiemensB-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors

Siemens Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp

The SIEMENS IEC Supplementary Protector (SKU 30XV12) is a B-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protector rated at 40 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC Voltage Rating of 400V…

SKU 3G-OTH-21904

Brand
Siemens
Item
Supplementary Protector: 40 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp
Category
B-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protectors
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Technical Specifications

Siemens
Manufacturer Part Number
5SY42406
Series
5SY4
Type
10kA at 400V AC, Screw Clamp, 5SY4
AC
400V
DC
72V
Curve Type
B
Max. AIR Rating
10kA at 400V AC
AC Voltage Rating
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 IEC Supplementary Protector (SKU 30XV12) is a B-Curve, 2-Pole UL1077 DIN Rail-Mount Supplementary Protector rated at 40 A Amps. It features a Max. AIR Rating of 10kA at 400V AC, AC Voltage Rating of 400V AC, and DC Voltage Rating of 72V DC, with a Screw Clamp terminal connection. This unit is part of the 5SY4 series (MPN 5SY42406).

Frequently Asked Questions

What is the SIEMENS 5SY42406 supplementary protector used for?

The SIEMENS 5SY42406 is a B-Curve, 2-pole supplementary protector used to protect branch circuits and sensitive equipment against overloads and short circuits in industrial control panels, HVAC systems, and machinery. It is rated 40 A at 400V AC and 72V DC, with a 10kA interrupting rating at 400V AC.

What are the specifications of the SIEMENS 5SY42406?

The SIEMENS 5SY42406 is a 40 A, 2-pole supplementary protector with a B-Curve trip characteristic. It has an AC voltage rating of 400V AC, a DC voltage rating of 72V DC, and a maximum AIR rating of 10kA at 400V AC. The terminal connection is screw clamp, and it is part of the 5SY4 series.

Where to buy the SIEMENS 5SY42406 worldwide?

You can source the SIEMENS 5SY42406 supplementary protector through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens components for industrial applications.

How to install the SIEMENS 5SY42406 supplementary protector?

Install the SIEMENS 5SY42406 by snapping it onto a standard DIN rail. Ensure the circuit is de-energized, then connect wires to the screw clamp terminals per the torque specifications in the datasheet. The B-Curve trips between 3-5 times rated current, suitable for resistive and lighting loads. Always follow local electrical codes.

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, 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.

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SIEMENS IEC Supplementary Protector: 63 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42636). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 32 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42326). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 16 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42166). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42136). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 13 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42136). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42106). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
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SIEMENS IEC Supplementary Protector: 10 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42106). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
SIEMENS IEC Supplementary Protector: 50 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42506). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.
Siemens
SIEMENS IEC Supplementary Protector: 50 A Amps, 72V DC, 10kA at 400V AC, Screw Clamp, 5SY4, 400V AC (MPN 5SY42506). Key specifications — Terminal Connection: Screw Clamp; AC Voltage Rating: 400V AC; Curve Type: B; DC Voltage Rating: 72V DC; Max. AIR Rating: 10kA at 400V AC; Series: 5SY4; Brand: SIEMENS.