Sinemeup

Looking for a ssr capable of switching 10amps, dc/dc

Hoping to source it from local electrical supply

Any thoughts?

nghtrdr

when u fing them please let me know

i want to get rid of all my mechanical relays

BradSk88

Very hard to find.
Digikey can get them to your door in literally two days and for 1/40th the cost.

Sinemeup

So I found out today that Sayal Electronics has been in my town for the last year and I have never heard of them until today. On the shelf they had 3 listed SSR's and 2 in stock. The 3-32v that was in stock was rated for 40 amps ($45). So to the next best thing (5amp rating) 1 x TIP120 transistor, 1 x 1k resistor, 1 x 100k resistor and a 5 amp fuse for protection ($3.00 give or take) I built it in the car on my lunch break and tested it when I got home. Connect 1k to Base, add fuse to Collector, make junction at Emitter add 100K to gnd and run small wire from Emitter. When 12v is applied to Base, 12v Collector voltage is then transmit out the Emitter (Thus turning on/off devices without collapsing coil transients) Its a little crude, but I'm sure it can be refined

Either way I built it in Canada for less than I have ever seen a relay sold for. This circuit is only good for 3-5 amps. (See sticky in CA TECH DISCUSSIONS) Props to the Tube Doctor

The Tube Doctor

Thanks for the compliment, Sinemeup, but to give credit where it's due;
I learned of this circuit close to 20 years ago, from David Navone & Richard Clark.
(anyone else got their archive of A2000 Tech Briefs?)
You can also add a monostable 555 timer circuit to give you turn-on or turn-off delay.
I can't remember the last time I used an electromechanical relay for remote turn on........

Sinemeup

Now that I can find the parts, keep those circuits coming!!

The Tube Doctor

Hi Yuan,
Are you really in Guangdong/GZ?
I'm in HK, running a car audio/electronics shop.
Are you in the biz, or an enthusiast? PM me if you
want to chat.