350A High Voltage DC Contactor, 9-36V Coil Voltage

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$212.15

350A high voltage DC contactor offers 9-36V coil voltage, NO contact form, and normally open or normally closed auxiliary contact, used for safely controlling and disconnecting high voltage DC circuits.

Auxiliary Contact *
Auxiliary Contact Form *

SKU: ATO-DCCON-350

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Delivery date: 6-12 days

Overview

High-performance 350A high voltage DC contactor features 9-36V coil voltage range, NO contact type, non-polarity, and NO/NC auxiliary contact, capable of withstanding continuous loads of DC and the intense arcing that occurs during disconnection.

Features

350A DC contactor adopts high-strength epoxy resin sealing with nitrogen-based gas filling, eliminating arc leakage risks, preventing contact oxidation, and ensuring safe operation without fire or explosion during its service life.
It provides reliable performance with 350A continuous current at 85℃, IP67 contact protection, insulation resistance up to 100MΩ (1000V DC), and dielectric strength of 3.5kV between contacts and coil.
High voltage DC contactor meets IEC 60664-1, GB/T14048.1, GB/T14048.4 standards, complies with RoHS (2015/863/EU) and REACH (1907/2006/EC), and is certified by CE, CCC, and RoHS.

Specifications

Model		ATO-ADH-350
Main Contact Specification
Contact Arrangement		1K (1NO)
Contact Polarity		Non-polarity
Contact Resistance		≤0.5mΩ (at 350A)
Max. Switching Voltage		1,000V DC
Max. Breaking Current		2,000A (320V DC) 1 Ops
Electrical Endurance (Resistive Load)		3,000 Ops (1,000V DC, 350A)
		5,000 Ops (750V DC, 350A)
		6,000 Ops (500V DC, 350A)
Mechanical Endurance		300,000 Ops
Withstand Current		350A, Continuous
		400A, 60min
		500A, 5min
		2,100A, 1s
		10,000A, 10ms
Performance Parameter (at 23℃)
Pickup Voltage		See Coil Parameter Tables
Dropout Voltage		See Coil Parameter Tables
Pickup Time		≤25ms
Contact Bounce Period		≤5ms
Dropout Time		≤6ms
Dielectric Strength	Between Main Contacts	12,000V DC 1min
	Between Main Contact and Coil	3,500V DC 1min
Insulation Resistance	Initial State	100MΩ 1min
	After Electrical Life	50MΩ 1min
Shock	Stability	20g (Power On)
	Strength	50g
Vibration		10g, 10~500Hz, 1/2 Sine Wave (Power On)
Relative Humidity		5%~95%RH
Temperature		-40℃~85℃
Load Terminal		External Thread M8
Weight		About 480g
Dimension		80x65.5x72.5mm
Temperature Rise		Main Contact Temperature Rise≤65K (120mm2, 350A Continuous)
Auxiliary Contact Parameter
Aux. Contact Arrangement		FK/FB/FZ (1NO/1NC/1CO)
Aux. Contact Rated Current		5A
Aux. Contact Max. Breaking Voltage		120V DC
Coil Parameter
Coil Voltage		9-36V
Pickup Voltage (DC)		9-36V
Dropout Voltage (DC)		5-7V
Coil Resistance		3.3Ω±10%
Starting Power		25W±10%
Holding Power		3.0W±10%

Dimensions (Unit: mm)

350A high voltage DC contactor without auxiliary switch dimension

350A high voltage DC contactor with auxiliary switch dimension

Wiring Diagram

Note: A1&A2 main terminals with non-polarity; 3&4 auxiliary contact terminals; 1&2 Circuit diagram.

350A 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: What is a High Voltage DC Contactor?

The High Voltage DC Contactor is an electrically controlled switch designed to safely make or break high-voltage direct current circuits. Unlike AC contactors, they are built to handle the unique challenges of DC, such as arc suppression and continuous current carrying at high voltages.

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