1. Brief 

Oswell JBS Series Latching Relay is a very reliable big current switching unit with its patent design. It consists of 3 phase switch (K), double coils(KA1,KA2) and mechanical locking device. 3 phase Switch K has 2 status, Kon and Koff. Instantaneous pulse will drive the K switching between Kon and Koff. 
In operation, giving an instantaneous driving pulse to coil KA2, the main switch K will be locked to be Kon status very closely. If giving an instantaneous driving pulse to coil KA1, the relay will be unlocked quickly and the main switch K will be on Koff status. 
Whether the contactor keep its status at the Kon or Koff, it doesn’t need any current to serve. so it doesn’t consume power energy. 

2. Features

1)  Capable of switching big current of 3 phase at the same time 
2)  Small contact resistance, lower voltage drop and low temperature increasing
3)  Mechanical lock device can prevent from lightning strike and wrong operation
4)  Double coil design, driving circuit is easy and cost is low 
5)  Resistant to out magnet and noise 
6)  Free from vibration and shock 

3. Model No. 

4. Technical Parameters

5. Application notes

Working driving pulse voltage VDD is 22V-30V, but normally driving pulse voltage the higher the better. 
Working driving pulse width is 80-150ms. When driving pulse voltage is high, driving pulse width could be a low value. 
Kon and Koff switching will ask for an instantaneous power, rechargeable battery or super capacitor should be able to supply the needed driving current to the relay.
The switching transistor in driving circuit should meet the relay’s voltage and current demand, its rise time should be small as possible. 
With above analysis, we suggest: 
VDD=22-30V, Pulse width>80ms, Super capacitor: 1000uf/35V
Switching transistor: S8050, S8550, β≥200 Voltage＞40V Ic＝1000mA

6. Reference driving circuit

Circuit 1: power supply in 12V or 15V output 

Circuit 2: Power supply in 24V output

7. Out dimensions