CZQH300A-U SPDT DC Contactor

The CZQH300A-U SPDT DC contactor is a high-performance device that features a single-pole double-throw (SPDT) design with one input and two outputs for efficient circuit switching. Supporting currents up to 300A, it is ideal for high-power DC applications such as electric vehicles, solar systems, and industrial automation. Known for its fast response, low power consumption, and high reliability, it is manufactured with durable materials to maintain stable performance under harsh conditions. The compact design and long service life improve availability and cost-effectiveness, making it the first choice for high-power DC systems.

product details

FEATURES

This product is ideal for a wide range of applications, including electric forklifts, battery-powered vehicles, tractors, excavators, brick-making machines, cleaning equipment, automotive air conditioning systems, communication power supplies, uninterruptible power supplies, and electroplating electronic control systems. It is particularly well-suited for power supply switches and control circuits. The product boasts several advantages, such as compact size, high load capacity, extended service life, and ease of maintenance, making it highly popular among users.

Manufactured in compliance with the JB2286-78, JB3974-85, YD/585-92, and YD/T512-92 standards, the product has undergone rigorous testing at the factory and by relevant testing institutions to ensure it meets all standard requirements. It has been widely used by customers for many years, consistently delivering reliable performance and meeting diverse user needs with its dependable quality.

SAYOON MODEL IMPLICATION

CZQH	300A	-U	-□	-□	/24V
1	2	3	4	5	6

1	Product type
2	Rated current
3	Circuit structure: SPDT
4	P-With protective cover(default)
5	Working system: CO-Continuous; INT-Intermittent


6	Coil rated voltage:12V, 24V, 36V, 48V, 60V, 72V etc.

USES

This product have one normally open and one normally close contact, for using in DC circuits and can be powered with battery of recitified power. They perform power switching funcition for power switching operations of traction drives as well as pump motor and other electric vehicles.

TECHNICAL PARAMETERS: (Version 1.39)

SAYOON Product Type	CZQH300A-U
Contact form	1 NO 1 NC Convert
Coil Rated voltage (DC V)	6V,12V,24V,36V,48V,60V,72V,84V,120V,150V,220V etc.
Contact voltage (DC V)	≤80V
Rated load current of contact 48V circuit (DC-1)	300A
Typical voltage drop across contacts per 100A	≯80mV
The cooling pull-in voltage at (20±5)℃ (V)	≯70%
The cooling drop-out voltage at (20±5)℃ (V)	≯35%,≮5%
Working voltage range of 40℃ coil	0.8-1.2Us
Drop-out time (n/o contacts to open)	30ms
Pull-in time (n/o contacts to close)	6ms
Maximum bounce time for contact connection	10ms
Maximum bounce time for contact disconnection	3ms
Insulation resistance	20MΩ
Electric strength to resist	50Hz/60Hz 1000VAC 1minute
Typical fault currents which can be ruptured	1500A/5ms at 48V/DC
Coil power (W)	30-50
Temperature rise of coil (K)	≤80
Temperature rise on outgoing terminal (K)	≤65
Electrical life	20,000 times
Mechanical life	300,000 times
Work specification	Continuous or Intermittent
Contact material	Ag alloy
Load terminal type	M8 Screw
Coil terminal type	M4 Screw
Testing organization certification	CE,FCC

Note:As regarding to the different using environments of customers which requires different focus of the functions,and in order to improve the comprehensive properties of our products,sayoon may adjust the coil parameters,temperature rise and so on. The above parameters are for reference only, For details, please refer to the guidelines for selection and use of the SAYOON DC contactor.

LOAD CHARACTERISTIC CURVE

INSTALLATION DIAGRAM

WIRING DIAGRAM

TEMPERATURE CURVE

MECHANICAL ABILITY and USE of the ENVIRONMENT

Contact lead M8 tightening torque (N.m)	≯9.0 appropriate
Coil lead M4 tightening torque (N.m)	≯1.2 appropriate
Ambient temperature	-25~+70℃
Relative humidity	+20℃ 98%
Vibration freq. atthe fixed position	3G, 1～50Hz amplitude 0.5mm
Concussion	(60～100) time/minute、acceleration≤4g
Altitude	2000m
Installation direction	Random
International protection	IP40 (According IEC60947)

ORDER INSTRUCTION

SAYOON Product Type	CZQH300A-U
U.N.W.	1605g
Package QTY.	20 PCS
Mounting bracket type	Vertical

When ordering, please state the following: name, full model, control coil voltage specification, installation frame type, whether with auxiliary contact, order quantity. For example: DC Contactor CZQH300A-U/24V 100pcs, indicating the load rated current 300A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.