SZJ1500A Normally Open DC Contactor

A normally open DC contactor is an electrical device used to control a DC circuit, and is widely used in motor starting, automation control, power management, etc. The contactor remains open when power is off and only closes when a control signal is applied to connect the circuit.

product details

FEATURES

The design of the normally open DC contactor makes it play an important role in many applications. During the motor starting process, it can effectively control the flow of current, ensure the smooth start of the motor, and avoid damage to the equipment caused by excessive current. In the automation control system, the normally open DC contactor can be used in conjunction with sensors and controllers to achieve precise control of the equipment. Therefore, understanding the functions and applications of normally open DC contactors is an important step for electrical engineers and technicians to improve their professional capabilities and meet future technical challenges.

SAYOON MODEL IMPLICATION

SZJ	1500A	-S	-□	-□	/□
1	2	3	4	5	6

1	Product type
2	Rated current
3	Auxiliary switch: None-Without auxiliary switch; S-With auxiliary switch
4	Mounting bracket type: None-M Horizontal (default); E-Level embedded
5	Other function codes
6	Coil rated voltage: 12V, 24V, 36V, 48V, 60V, 72V etc.

Uses

This product have one normally open contact, for electric vehicles, telecommunication equipment, engineering machinery, car batteries, electric forklift trucks, trains, ships, electronic control systems such as uninterruptible power supply.

Technical Parameters: (Version 1.43)

SAYOON Product Type	SZJ1500A
Contact form	1 NO
Coil Rated voltage (DC V)	6V,12V,24V,36V,48V,60V,72V,84V,120V,150V,220V etc.
Contact voltage (DC V)	≤60V
Rated load current of contact 48V circuit (DC-1)	1500A
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)	≯40%,≮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)	15ms
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	3500A/5ms at 48V DC
Coil power (W)	Start: 140-190, Keep: 9-18
Temperature rise of coil (K)	≤50
Temperature rise on outgoing terminal (K)	≤65
Electrical life	10,000 times
Mechanical life	200,000 times
Work specification	Continuous
Contact material	Ag alloy
Load terminal type	2-M12 Screw
Coil terminal type	M4 Screw
Auxiliary contact rated load (optional)	2A/48VDC, 5A/24VDC
Testing organization certification	CE,FCC,RoHS

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 M12 tightening torque (N.m)	≯30.0 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	SZJ1500A
U.N.W.	2800g
Package QTY.	4PCS
Mounting bracket type	None - M Horizontal (default), E Level Embedded

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 SZJ1500A/24V 100pcs, indicating the load rated current 1500A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.