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300A DC Contactor, 12V/24V/48V/220V

5 out of 5 based on 1 reviews | Write a review

$145.36

300A DC contactor with high-performance quality, contact form can be selected as normally open or normally closed. This 300 amps contactor is available in coil voltage 12V, 24V, 48V, 220V, with low cost and manufacturer direct sale.

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SKU: ATO-DCCON-C300

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Overview
Related Video

High performance 300A DC contactor with normally open or normally closed contact options. This DC contactor is available at low cost direct from the manufacturer and is available in coil voltages of 12V, 24V, 48V and 220V. Single coil 300A DC contactor is suitable for switch control of system circuits such as electric toy cars, battery cars, cleaning cars, automobile air conditioners, communication power supplies, and automobile air conditioners.

Features

300A DC contactor has the characteristics of small size, large load capacity, long service life and simple maintenance, and is very popular among users.
300 amps contactor complies with the requirements of the ministry standards JB2286-78, JB3974-85, YD/585-92, YD/T512-92. It has been tested in the factory and by relevant testing units and meets the requirements of the ministry standards. It has been used by users for many years to satisfy users to the maximum extent. Needed, reliable quality.
Single coil 300A DC contactor are suitable for electric forklifts, battery trucks, tractors, excavators, brick making machines, cleaning vehicles, automotive air conditioners, communication power supplies, switch control of electronic control circuits of uninterruptible power supplies, electroplating power supplies and other systems.

Specifications

Model	ATO-SZJ300A-D	ATO-SZJ300A
Contact Form	Normally Closed (NC)	Normally Open (NO)
Coil Rated Voltage (DC V)	12V, 24V, 36V, 48V, 60V, 72V, 84V, 120V , 150V, 220V	12V, 24V, 36V, 48V, 60V, 72V, 84V, 120V, 150V
Contact Rated Voltage (DC V)	≤80V
Contact 48V Circuit Rated Load Current (DC-1)	300A
Main Contact Contact Coltage Drop Under 100A Load	≥80mV
Cooling pull-in voltage (V), (20±5)℃	≥70%
Cooling release operating voltage (V), (20±5)℃	≥35%, ≤5%	≥40%, ≤5%
40℃ Coil Operating Voltage Range	0.8-1.2Us
Power-on Action Time	10ms	15ms
Power-off Release Time	20ms	10ms
Maximum Bounce Time of Contact Connection	10ms
Maximum Bounce Time of Contact Disconnection	3ms
Insulation Resistance	20MΩ
Dielectric Strength	50Hz/60Hz 1000VAC 1minute
Maximum Breaking Capacity of Main Contact (Power on for 5ms)	1000A/5ms at 48V/DC
Coil Power Consumption (W)	7-15	Start: 120-170, Hold: 4-10
Coil Temperature Rise (K)	≤80	≤40
Terminal Temperature Rise (K)	≤65
Electrical Life	20000times
Mechanical Life	300,000 times
Work Specifications	Continuous
Contact Material	Silver alloy
Load Terminal Type	M8 screw
Coil Terminal Type	M4 screw
Auxiliary Contact Rated Load (Optional)	2A/48VDC, 5A/24VDC, one on and one-off	2A/48VDC, 5A/24VDC
Testing Agency Certification	CCC, CE, FCC, RoHS

Load Characteristic Curve

Installation Dimension Diagram

300A DC contactor m installation dimension drawing

SZJ300A-D Wiring Diagram & Coil Temperature Rise Curve Graph

Normally closed wiring diagram

One way is normally closed (SPST 1NC)
1 and 2 are contact terminals
A1 and A2 are coil terminals

300A DC contactor szj-d temperature rise curve graph

SZJ300A Wiring Diagram & Coil temperature Rise Curve Graph

300A DC contactor wiring diagram

One way is normally open (SPST 1NO)

1 and 2 are contact terminals
A1 and A2 are coil terminals
L1 is the take-off winding L2 is the holding winding

300A DC contactor szj coil temperature rise curve graph

Mechanical Capabilities and Usage Environment

Contact Terminal M8 Tightening Torque (Nm)	≯9.0 is appropriate
Coil Lead-out M4 Tightening Torque (Nm)	≯1.2 is appropriate
Ambient Temperature	-25~+70℃
Relative Humidity	+20℃ 98%
Vibration Frequency at Fixed Location	3G, 1～50Hz, amplitude 0.5mm
Impact	(60～100) times/min, acceleration ≤4g
Altitude	2000 meters
Installation Direction	Arbitrary
Protection Level	IP40 (equivalent to IEC60947)

Tips: The difference between DC contactor's single coil and double coil

The starting power of the DC contactor's single coil is as small as the holding power, and the pull-in voltage range is wider. For example, a DC contactor with a 48V coil can pull in normally at a voltage of 41V, but the temperature rise is faster than that of a double coil.
The dual-coil coil of DC contactor has a large starting power, a small holding power, and a narrower voltage pull-in range. For example, a DC power contactor with a 48V coil requires a minimum pull-in voltage of 43V, but the temperature rise is slower than that of a single coil.

Electromagnetic Switches: Relays VS. Contactors

In this video we will try to clear the confusion many people have between relays and contactors by showing you how to tell the difference based on five criteria: Definition, Capacity, Structure, Contacts and Applications.

Existing reviews of 300A DC Contactor, 12V/24V/48V/220V

Reliable DC contactor

In actual applications, I found that the 300A rated current handling capacity allows this contactor to easily handle high-load scenarios. Whether it is starting large motors or controlling heavy machinery and equipment, it can work stably without fear of current shock.

From: Narlix | Date: 16/01/2025

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