40A High Voltage DC Contactor, 12V/24V/48V Coil Voltage

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$108.66

Reliable high voltage DC contactor, 40A rated load current of contact circuit, maximum switching voltage up to 750V DC, 1K (1NO) contact form, 12V, 24V, 48V, 60V, or 72V coil voltage for selection, specially designed to meet the requirements of high voltage DC switching applications.

Coil Voltage(V) *

SKU: ATO-DCCON-40

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Delivery date: 6-12 days

Overview

40A high voltage DC contactor manufacturer direct sale. It provides optional 12V/24V/48V/60V/72V coil voltage, non-polarity contact, 750V DC maximum switching voltage, 1K (1NO) contact arrangement, compact size, and high performance.

Features

40A DC contactor uses ceramic brazing technology and is filled with hydrogen-based gas at the contact area, which prevents oxidation and burning, ensures low and stable contact resistance, and provides IP67 protection.
It offers reliable performance with long-term current carrying capacity, high insulation resistance up to 100MΩ (1000VDC), and withstand voltage of 4kV between contact and coil.
The high voltage DC contactor complies with IEC 60664-1, GB/T14048.1, GB/T14048.4, RoHS (2015/863/EU), REACH (1907/2006/EC), and holds safety certifications such as CE and RoHS.

Specifications

Model		ATO-ADE-40
Main Contact Specification
Contact Arrangement		1K (1NO)
Contact Polarity		Non-polarity
Contact Resistance		≤0.5mΩ (at 40A)
Max. Switching Voltage		750V DC
Max. Breaking Current		400A (300V DC) 1 Ops
Electrical Endurance (Resistive Load)		20,000 Ops (450V DC, 40A)
		1,000 Ops (750V DC, 40A)
Mechanical Endurance		200,000 Ops
Withstand Current		40A, Continuous
		60A, 1h
		80A, 20min
		160A, 30s
		320A, 5s
		400A, 0.6s
Performance Parameter (at 23℃)
Pickup Voltage		≤75%Us
Dropout Voltage		≥8%Us
Pickup Time		≤30ms
Contact Bounce Period		≤5ms
Dropout Time		≤10ms
Dielectric Strength	Between Main Contacts	3,000V DC 1min
	Between Main Contact and Coil	4,000V DC 1min
Insulation Resistance	Initial State	100MΩ 1min
	After Electrical Life	50MΩ 1min
Shock	Stability	20g (Power On)
	Strength	50g
Vibration		5g, 10~500Hz, 1/2 Sine Wave (Power On)
Relative Humidity		5%~85%RH
Temperature		-40℃~85℃
Load Terminal		QC Terminal
Weight		About 160g
Dimension		79.2x39.6x46.1mm

Coil Parameter

Coil Voltage	Pickup Voltage (VDC)	Dropout Voltage (VDC)	Coil Resistance	Coil Power Consumption
12V	≤75%Us	≥8%Us	48Ω±10%	3W±10%
24V	≤75%Us	≥8%Us	192Ω±10%	3W±10%
48V	≤75%Us	≥8%Us	761Ω±10%	3W±10%
60V	≤75%Us	≥8%Us	1200Ω±10%	3W±10%
72V	≤75%Us	≥8%Us	1728Ω±10%	3W±10%

Dimensions (Unit: mm)

40A high voltage DC contactor dimension

Wiring Diagram

40A high voltage DC contactor wiring diagram

Applications

High voltage DC contactors are widely applied in electric vehicles (EVs), renewable energy systems (solar and wind), energy storage systems (ESS), DC charging stations, uninterruptible power supplies (UPS), and industrial equipment that requires safe and reliable DC switching.

$350A high\ voltage DC contactor applications$

Tips: Why choose a 40A DC contactor instead of a higher current model?

A 40A DC contactor is more compact, cost-effective, and energy-efficient when the system current does not exceed 40A. It avoids oversizing while still providing the high voltage isolation needed in battery, renewable, or industrial DC systems.

Existing reviews of 40A High Voltage DC Contactor, 12V/24V/48V Coil Voltage

Works like a champ

This contactor handles my 48V system flawlessly. The ceramic sealing ensures no oxidation even after heavy use. Quick 30ms response and solid 4kV insulation give me total peace of mind.

From: Henry | Date: 19/09/2025

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