Trnasistor Datasheet Cross Reference Verification

[bostonman]

I have a transistor (believe MOSFET) from a car repair project I'm working on (see attached).

I'm looking for the datasheet and all I'm finding is SFS9644.

Does anyone know if this is the same transistor?

[Benta]

9644 is prolly the date code (1996, week 44).
Part type? no idea, could be custom marking.

[bostonman]

It could be.

It's from an Engine Control Module in a 97 Buick. This particular area has six of them and I believe each one controls each fuel injector. One injector isn't firing, and, ironically, this transistor measured different resistance on all three legs compared to others.

From what I can tell, one pin is ground, the other goes to the fuel injector (which has two pins - one is common 12V to all the other injectors, and the other pin is the other side of the 12 ohm coil in the injector which goes to this transistor via the harness), and I haven't traced the third pin yet.

Initially I assumed a transistor, but once I removed it from the circuit, it began measuring like a MOSFET where if I put the meter on diode, it seems to charge the gate and keep the MOSFET closed.

This device is either bad, was bad and somehow began working correctly due to applying heat to remove it, or something else on the third pin that I need to trace is causing different resistance.

Either way, I was hoping to start with the datasheet and maybe find a replacement to buy.

[floobydust]

IR2248 or IRF2248 is a Delphi fuel injector driver but I could not find out more.

[bostonman]

Thankfully it looks like maybe all that was wrong was a broken trace from the far left pin (I assume the gate) to its destination.

Initially I traced the fuel injector to this MOSFT, did a resistance check on the pins, compared it to the other identical circuits (I assume they're identical since they each control a different number fuel injector), and noticed the resistance was different.

Thought the device was open until I removed it and seemed to be measuring correctly. After, I realized the trace was questionable, and then determined it wasn't connected.

I'd still like to find the datasheet for this, but hopefully I won't need it. Hard to say if that's the date code because it is a 97 car which would mean they component would be hot off the press, shipped to the board house, built, installed in the car, shipped to the dealership, etc... all within a few months.