300A High Voltage DC Contactor, 12V/24V coil

$186.15

The ATO-ADH300 contactor has been designed for DC loads, particularly for DC high voltage field, operating voltage up to 900V. 300A rated load current of contact circuit, normal open (SPST-NO) main contacts with silver alloy tips, which are weld resistant, hard wearing and have excellent conductivity.

SKU: ATO-DCCON-HV300

Coil Rated Voltage (V) *

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Delivery date: 6-20 days

Overview
DC Contactors Catalog

ATO high voltage DC contactor, rated load current of 300 amps, available 12V or 24V energy saving coil. It can work in the hostile environment, coil and contact can not be oxidized and polluted.
300A High Voltage DC Contactor Features

DC 12-900V rated load voltage of contact circuit.
SPST-NO (normally open type) of contact form, 12 volt, 24 volt coil for selecting.
Main contact voltage drop at 300A, not above 100mV.
The connection of contact and coil need to be nonpolarity.
Efficient coil, retentive power is only 2-2.3W, counter electromotive force is 0V.
The joint way of the coil is very convenient.
The coil has no counter force of electromagnetism.
Compare to the similar products, this product is smallest and lightest.

Specifications

Basics	Model	ATO-ADH300
	Dimension	80 x 65 x 74 mm
	Weight	480 g
Main Contact Parameters	Contact Form	1 NO
	Leading-Out	M10 Internal thread
	Rated Load Current	300 A
	Rated Load Voltage	12 – 900V DC
	Maximum Switching Current	2000A 320V DC (≥1 times)
	Maximum Switching Power	640 kW
Coil Parameters	Standard Type Voltage	12/24V DC
	Work Voltage	8~36V
	Max Voltage	36 V
	Coil Resistance	3.1Ω
	Average Holding Current	0.14 A
	Steady State Power	1.7~2 W
	Actuation Time	≤30 ms
	Release Time	≤10 ms
	Bounce Time	≤5 ms
Mechanical Specification	Stability	196 m/s²(20G)
	Strength	490 m/s²(50G)
	Vibration	80 ~2000Hz 98m/s²(20G)
	IP Grade	IP67
Environment	Operating Temperature	-40℃~85℃
Environment	Operating Humidity	5~95% RH

300A DC Contactor Installation Diagram

High Voltage DC Contactor Coil Schematic
Tips: How to examine the contactor with a multimeter

Test the coil with the ohm gear of multimeter, check if the coil is shorted, if it is, the coil is broken.
Test whether the normally closed auxiliary contact is breakover with the ohm gear of multimeter. If the contact doesn't contact well, the measuring resistance will be great. If the auxiliary contact is connected with load, the voltage will not reach the rated voltage when measuring.
Press the main contact with your hand to check if the contactor mechanism gets stuck or not.
Power on the contactor coil directly to check if the contactor pulls in or not.
After the contactor pulls in, test with a multimeter to check if the normally open auxiliary contact is breakover.

Download ATO DC contactors catalog.pdf

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