SZJ600A Normally Open DC Contactor

One such device that is highly regarded in a variety of applications is the normally open DC contactor. This electrical component plays a vital role in managing direct current (DC) circuits, making it an essential tool for professionals in this field. The normally open DC contactor is designed to remain in an open circuit when power is removed, ensuring safety and preventing accidental startup. This feature alone makes it the preferred choice for many industrial and commercial applications.

product details

FEATURES

The primary function of a normally open DC contactor is to control the flow of current in a DC circuit. When a control signal is applied, the contactor closes, allowing current to flow and energize the connected load. This mechanism is particularly useful in motor starting applications, where the ability to control power is critical. By using a normally open DC contactor, operators can effectively manage the starting and stopping sequence of the motor, ensuring smooth operation and reducing the risk of equipment damage.

SAYOON MODEL IMPLICATION

SZJ	600A	-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; E1-Level embedded single direction
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 2.43)

SAYOON Product Type	SZJ600A
Contact form	1 NO
Coil Rated voltage (DC V)	6V,12V,24V,36V,48V,60V,72V,84V,120V,150V etc.
Contact voltage (DC V)	≤60V
Rated load current of contact 48V circuit (DC-1)	600A
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)	10ms
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	2000A/5ms at 48V DC
Coil power (W)	Start: 120-170, Keep: 6-13
Temperature rise of coil (K)	≤45
Temperature rise on outgoing terminal (K)	≤65
Electrical life	20,000 times
Mechanical life	300,000 times
Work specification	Continuous
Contact material	Ag alloy
Load terminal type	M12 Screw
Coil terminal type	M4 Screw
Auxiliary contact rated load (optional)	2A/48VDC, 5A/24VDC
Testing organization certification	CCC,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	SZJ600A
U.N.W.	1424g
U.G.W.	1502g
Package QTY.	12PCS
Mounting bracket type	None - M Horizontal (default), E Level Embedded, E1 Level embedded single direction

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 SZJ600A/24V 100pcs, indicating the load rated current 600A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.