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SZJ100A Normally Open DC Contactor

The normally open DC contactor is an essential electrical component that plays a vital role in controlling the on and off states of DC circuits. Its operating principle features an electromagnetic coil and a normally open design, which allows for safe and efficient operation in a wide range of applications. With advantages such as high current carrying capacity, fast response time and durability, these contactors are indispensable in a variety of industrial and commercial fields. As technology continues to develop, the importance of the normally open DC contactor will only grow, consolidating its key position in the field of electrical engineering.

product details

FEATURES

Normally Open DC Contactor is widely used in many fields and scenarios, mainly including the following aspects:

1. Motor control: Commonly used for start and stop control of DC motors, suitable for power tools, electric vehicles and industrial equipment, etc.

2. Renewable energy systems: In solar power generation systems and wind power generation systems, switches used to control the charging and discharging of inverters and batteries.

3. Battery Management System: used to connect and disconnect the battery pack to ensure safe and efficient charging and discharging process.

4. Lighting control: In DC lighting systems, it controls the switch of lamps, which is suitable for LED lighting and other DC lighting applications.

5. Heating equipment: Used for the control of DC heaters to ensure the safe and efficient operation of heating equipment.

6. Transportation: Switches used to control power in electric buses, subways and other electric transportation vehicles.

7. Automation equipment: In industrial automation systems, it controls the switches of various DC loads, such as conveyor belts, robots, etc.

8. Household appliances: In some DC-powered household appliances, it is used to control the power switch.

These application scenarios demonstrate the importance of normally open DC contactors in modern electrical systems, which can effectively realize the control and management of DC circuits.

SAYOON MODEL IMPLICATION

SZJ	100A	-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; L(N)-Vertical; 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 2.44)

SAYOON Product Type	SZJ100A
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 (A)	100A
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)	12ms
Pull-in time (n/o contacts to close)	8ms
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	800A/5ms at 48V DC
Coil power (W)	Start: 120-170, Keep: 3-8
Temperature rise of coil (K)	≤40
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	M6 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 M6 tightening torque (N.m)	≯4.5 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	SZJ100A
U.N.W.	265g
U.G.W.	283g
Package QTY.	100PCS
Mounting bracket type	None - M Horizontal (default), E Level Embedded, L (N) Vertical, 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 SZJ100A/24V 100pcs, indicating the load rated current 100A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.