Sometimes people stop at the first word they encounter in a phrase and call it good. I know I did for a while. The phrase “opto-coupler” had been stored as ‘opto-something’ in my brain because the only opto-anything I’d ever worked on was an opto-coupler. So when VMI came out with an opto-diode, it took a little while to adjust.
I knew I wasn’t the only one to experience difficulty with part numbers when several colleagues responded sympathetically as I hopelessly mixed them up in various internal and external correspondences. To their credit, the Sales department was very patient with me. Was it an OZ100HG, or OC100SG? I knew I had the “100” part right, but that was about it.
For the record, the correct part numbers are OZ100SG, and OC100HG. Here’s a breakdown of what the part designators mean -
On the other hand, the OC100HG is an opto-coupler, as indicated by “OC”. It has a Vrwm of 10kV as evidenced by the “100”. “HG” stands for “High Gain”.
The OZ100SG is a stand-alone opto-diode. “O” stands for “opto”, “Z” indicates the body
size; “100” stands for 10kV Vrwm, and “SG” indicates Vf, Ir, and Trr, are
identical to the discrete, glass body Z100SG diode.
|OZ100SG - 10kV Opto-DIODE|
Another important distinction is package size. The OZ100SG is much smaller since the only
thing in it is a z-body, multi-junction, high voltage diode that has been
specially passivated and is super sensitive to light. The diode is over-molded in an optically
clear compound. The OZ100SG has two
terminals – anode and cathode.
|OC100HG - 10kV Opto-COUPLER|
The OC100HG, on the other hand, contains an opto-diode of sorts, and two LEDs that serve as an integrated light source. It is much larger than the OZ100SG.Got all that? No worries if you don't. Just give us a call.
· OZ100SG – 10kV opto-diode
· OC100HG – 10kV high gain opto-coupler
· Z100SG – 10kV high voltage diode