SW400 Solenoid SPST NO DC Contactor for Truck Winches SW400 Solenoid SPST NO DC Contactor for Truck Winches
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SW400 Solenoid SPST NO DC Contactor for Truck Winches SW400 Solenoid SPST NO DC Contactor for Truck Winches
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SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
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SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
SW400 Solenoid SPST NO DC Contactor for Truck Winches
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IP65 12V 24V DC 250A Warn Badlands ATV Electric Winch Solenoid
IP65 12V 24V DC 250A Warn Badlands ATV Electric Winch Solenoid
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SW300 300A SPST NO DC Contactor for EV/Winch
SW300 300A SPST NO DC Contactor for EV/Winch

SW400 Solenoid SPST NO DC Contactor for Truck Winches

Electricity Type:DC
Brand Name:NewTrend or OEM
Place of Origin:China
Model Number:SW400
Phase:1
Main Circuit Rating Current:400A
Coil Voltage:12Vdc, 24Vdc, 36Vdc, 48Vdc, 72VDC, etc
Number of Pole
Main Circuit Rating Voltage
SKU: 1600053703059 Category: DC Contactors
  • Description
  • Additional information
  • Technical Datasheet & Downloads
  • Technical FAQ & Selection Guide
Description

SW400 400A 1NO Solenoid EV Relay 12VDC 24VDC truck winch motor 12V 24V NO SPST Single pole 1P 400A DC Contactor

Application:

The SW400 has been designed for Direct Current loads, including motors as used on electric vehicles such as industrial trucks.  Developed for both interrupted and uninterrupted loads, the SW400 is suitable for switching Resistive, Capacitive and Inductive loads.

 

The SW400 features Single pole Single throw, Double breaking main contacts with silver alloy tips, which are weld resistant, hard wearing and have excellent conductivity.  The SW400 has M10 stud main terminals and 6.3mm spade coil connections.  It can be mounted via M5 tapped holes or mounting brackets – either supplied fitted, or as separate items.  Mounting can be horizontal or vertical, when vertical the M10 contact studs should point upwards. If the requirement is for downwards orientation we can adjust the contactor to compensate for this.

 

Specification:

 

Model SW400 
Rated Current 400A
Contact Form 1NO, SPST
Contact Voltage 6-80V DC
Coil Voltage 12VDC, 24VDC, or other DC voltgae less than 220VDC
Coil Power 11-15W
Dielectric Voltage Strength 50Hz 1000V AC 1min
Volt Drop of Main Contact <80mV
Typical Pull-In Time <30ms
Typical Drop-Out Time
(N/O Contacts to Open)
<30ms
Pull-In Voltage (Coil at 20℃)  <66%Us
Drop-Out Voltage (Coil at 20℃)  5% – 30%
Mechanical life 100 thousand times
Electric life 20 thousand times
Circuit Diagram
Diagram & Dimension:

 

Additional information
Weight 2 kg
Dimensions 25 × 25 × 25 cm
Number of Pole

1

Main Circuit Rating Voltage

6-80V DC

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for SW400 Solenoid SPST NO DC Contactor for Truck Winches.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

AC-1 / AC-3 Duty

How to calculate contactor rating based on motor power and utilization categories (AC-1 vs AC-3 vs AC-4)?

A

AC-3 rating applies to standard squirrel-cage motor starting and stopping during normal run (starting current 5–7x In). For non-inductive or purely resistive heating loads, use the higher AC-1 rating. For severe inching, jogging, and plugging applications (AC-4 duty), derate the contactor or upsize by 1 to 2 frame sizes to prevent contact erosion.

Coil Voltage Selection

How to choose the correct control coil voltage, frequency, and electronic wide-voltage options?

A

Standard AC coils include 24V, 48V, 110V, 220V/230V, 380V at 50/60Hz. For DC control loops or PLC outputs, specify DC coils or electronic wide-range AC/DC coils (e.g. 100V–250V AC/DC) which feature built-in surge suppression, low holding power consumption, and immunity to voltage dips.

Overload Coordination

How to size and coordinate the matching thermal overload relay (TOR) for Type 2 protection?

A

Select a thermal overload relay whose current setting range straddles the motor full-load current (FLA). Set the dial precisely to 1.0x motor nameplate FLA. For IEC 60947-4-1 Type 2 coordination, pair the contactor and relay with backed-up upstream fuses or fast-acting MCB/MCCB to prevent welding under fault conditions.

Auxiliary & Interlocks

What auxiliary contact blocks and mechanical interlocks can be added for motor reversing?

A

Units feature built-in 1NO or 1NC auxiliary contacts, expandable with top-mounted 2-pole or 4-pole auxiliary contact blocks (F4 / AX) and pneumatic timer delay blocks. For forward/reverse motor starters or star-delta starter assemblies, add side-mounted mechanical interlock units (MI) with electrical interlocking.

Ambient & Altitude Derating

How do ambient temperature and installation altitude affect contactor performance?

A

Standard ratings are calibrated for -5°C to +40°C. For ambient temperatures exceeding 55°C or altitudes above 2000m (where reduced air density diminishes heat dissipation and dielectric insulation), derate operational current by 2% per 100m above 2000m and verify insulation voltage limits per IEC standards.

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