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[on:]

I have a bag of about 50 of these -- C106D1G :
found a datasheet at  : http://www.ic-on-line.cn/IOL/viewpdf/C106D1G_409220.htm

Can anyone tell me if these are suitable for use connected to an Output pin ?
I want to drive some 12V relays and some small 12V devices.

Not sure about all the technical terms, but from the data sheet I am (really) guessing that :
1. this can run safely on anything up to 400V 4A.
2. needs 2.2V 5mA to activate and hold the gate.

I would need a 560 ohms resistor between the output pin and the gate (calc done using : http://led.linear1.org/1led.wiz ) and a 1K resistor from Gate to Ground to pull down against any floating of the gate pin.

I assume that as this is "Reverse Blocking", I would not get any current from the cathode / anode side ( 12V ) of the chip feeding back into the gate ? or should I add a diode just in case ?

[Reply #1 on:]

SCRs will not turn OFF until the AK voltage is removed IIRC. So they aren't very suitable for switching DC items such as relays.

______
Rob

[Reply #2 on:]

SCRs will not turn OFF until the AK voltage is removed IIRC. So they aren't very suitable for switching DC items such as relays.

______
Rob

Thanks Rob.
So if I understand you correctly, once I have powered the gate, even if I remove the gate power, it still remains on, until I stop the flow of the current between cathode and anode ?

I also have a bunch of 2N2222A NPN transistors ( data sheet at : http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXyzzyw.pdf ) but not being an electronics person, I can't understand the jargon.

Any chance someone can tell me what I should be looking at to get the values for :
1. max V and A that can pass through the transistor.
2. V and mA required to activate the transistor.

I guess the pin to base resistor should be calculated in much the same way as for an LED to reduce the voltage to that required by the base ?

Also, would this type of transistor only pass thru current when the base is powered - so when I cut the base power, it breaks the flow thru the transistor ?

Many thanks in advance for any replies.
Dave


ps .... lets scrap this idea and do the right thing. I have created a new post :
http://arduino.cc/forum/index.php/topic,58059.0.html

[Reply #3 on:]

I see the other post is providing answers so we'll leave it here then.

______
Rob