AmelieScott

BTY79

NTE Replacement
BTY79-800R = NTE5531                  
BTY79-600R = NTE5529                  
BTY79-500R = NTE5529                    
BTY79-400R = NTE5527      

NTE Datasheet
http://www.nteinc.com/specs/5500to5599/pdf/nte5520_31.pdf

C106D = NTE5457

NTE Datasheet
http://www.nteinc.com/specs/5400to5499/pdf/nte5452_58.pdf

Try these suppliers

Digikey --- http://www.Digikey.com

Mouser --- http://www.Mouser.com

Newark --- http://www.newark.com

MCM Electronics --- http://www.mcmelectronics.com

I can't find SL100 & SK100 transistor :'(

Which transistors can replace these?

Thank you for your help~  ;)

A solenoid is just a linear motor therefore with no power you have no holding torque.  You can get a mechanical assist with some via a spring but unless you want to hold open when the power is off and release when power is on I don't think this will do you much good.  I think what you'll be after is some sort of mechanical solution beyond just the solenoid itself.

I want to apply force for an extended amount of time (10 secs to a couple minutes) using a solenoid actuator. Unfortunately, it seems that solenoids use a lot of power when they are active. Is there a solenoid type that will only use power when switching between active and not active? There's probably a way I can do this with an external mechanism, but I was wondering if there may be commercial solenoids that have this built-in.

Thanks,
Jessica