Overview

FEATURES

The key feature of the SPDT DC contactor is its single-pole, double-throw design. This configuration allows the contactor to connect a single input to one of two outputs, enabling the user to select between two different circuits. This feature is particularly useful in applications where circuit selection or alternation is required, such as in motor control systems or lighting configurations. The ability to switch between two outputs using a single input enhances the versatility of the contactor, making it a valuable asset in both industrial and residential environments.

SPDT DC contactors are designed for DC operation and are optimized to operate effectively under DC conditions. Unlike AC devices, which may not operate reliably in DC applications, SPDT contactors are designed to handle the unique characteristics of DC voltage. This makes them ideal for electric vehicles, renewable energy systems such as solar power generation, and other applications where DC power is the norm. Its stability under DC conditions ensures that it can reliably provide consistent performance in critical applications.

SAYOON MODEL IMPLICATION

CZWH	400A	-T	-S	-C	-M	-□	/24V
1	2	3	4	5	6	7	8

1	Product type
2	Rated current
3	Circuit structure: Single coil, single circuit
4	Auxiliary switch: None-Without auxiliary switch; S-With auxiliary switch
5	Magnetic blow-out
6	Mounting bracket type: M-Horizontal (default); L-One vertical; 2L-Two vertical
7	Other function codes: l-With suppressor diode; R-With pre-charged resistance; CO-Continuous; IN-Intermittent
8	Coil rated voltage: 12V, 24V, 36V, 48V, 60V, 72V etc.

Uses

This product have one normally open and one normally close 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 1.57)

SAYOON Product Type	CZWH400A
Contact form	1 NO 1 NC
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)	400A
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)	40ms
Pull-in time (n/o contacts to close)	12ms
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)	22-40
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(default)
Contact material	Ag alloy
Load terminal type	M10 Screw
Coil terminal type	6.3mm spade terminals
Auxiliary contact rated load (optional)	2A/48VDC, 5A/24VDC
Normally closed to normally open	14ms
Normally open to normally closed	8ms
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 M10 tightening torque (N.m)	≯20.5 appropriate
Coil lead-out torque (N.m)	≯0.8 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	CZWH400A
U.N.W.	1593g
Package QTY.	20PCS
Mounting bracket type	M Horizontal (default), 1L One vertical, 2L Two 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 CZWH400A/24V 100pcs, indicating the load rated current 400A, without auxiliary contact, default mounting bracket, coil control voltage 24V purchase 100pcs. Special voltage specification products, such as user needs can be special order.