DC Load DC Control Solid State Relay - del30007
This is a DC Input DC Output SSR Solid State Relay.
It was made for Printing or Photo Processing
Equipment. It has an optical isolation and can be
used for inductive loads.
There was a big and small model i made -
NO-NC SSR Plastic Box
The R1 Limits current and Z1 and D1 protects. The
2N3904 limits current in the Opto-Led. When the LED
in CNY17-3 turns on, the Light passes thru a
electrically insulating area and falls on the
photo-transistor in the opto-coupler. This
transistor conducts biasing Q2 PNP power
transistor. Then Q2 drives Q3 to saturation,
turning it on. Q3 is a High-Voltage and High-Power
rugged device. This can derive a solenoid, DC motor
I once got a mail about a smaller more
advanced relay -
Sourcing the SP646 Solid State Relay
D2 is a freewheeling diode, inductive kickbacks are
shorted by this. use a fast rec. Diode for better
performance. Control Signal is - DC, 3-30V and
Output Rating is - DC, 25V, 5A.