SZJ800A Normally Open DC Contactor

A standout feature of normally open DC contactors is their high current carrying capacity. Designed to handle large loads, the contactors are suitable for use in a variety of industrial and commercial environments. Whether used in manufacturing plants, renewable energy systems, or automation equipment, the ability to withstand high currents ensures that the contactors operate reliably in demanding conditions. This durability is critical to maintaining operational efficiency and minimizing downtime.

product details

FEATURES

In addition to their rugged design, normally open DC contactors feature fast response speeds. The ability to quickly switch states in response to control signals improves the overall efficiency of the system. In time-critical applications, such as automated processes or power management systems, the contactor's fast response can significantly improve performance. This feature not only optimizes the operation of connected equipment, but also saves energy by reducing unnecessary power consumption.

SAYOON MODEL IMPLICATION

SZJ	800A	-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 2.54)

SAYOON Product Type	SZJ800A
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)	800A
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	2000A/5ms at 48V DC
Coil power (W)	Start: 120-170, Keep: 6-12
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	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	SZJ800A
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 SZJ800A/24V 100pcs, indicating the load rated current 800A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.