I bought a grab-bag of NOS resistors and there was a diode thrown in. Just out of curiosity I'm trying to ID it.
It is definitely a Motorola diode. The labeling is clear and complete, it has the Motorola "M" clearly printed on it, and there's pictures of other similar diodes in Google if you search there for 'tiny Motorola diode'.
My mega328 parts tester says it's a diode: Uf = 767mv and C = 139pf.
It is a thru-hole part and the body is pretty small, maybe 1.5mm x 3mm, with thin leads, maybe 26ga.
Since the resistors are NOS carbon-composition, the diode may be older as well. It may be discontinued or superseded by another part# now.
The labeling is horizontal around the diode body and reads as follows:
MK (the M is the Motorola M logo inside a circle)
57
58
93
49
????
On some other diodes the first number indicates the general series of the diode, as in this page-
https://electronics.stackexchange.com/questions/56056/identify-these-diodes
But that doesn't work here. If I google for "motorola diode 57" I just get page 57 of the Motorola catalog, or page 57 of other electronics parts catalogs.
I have diode assortments around with all the common stuff, I don't need it for anything so it's not really critical. I'm more curious about how to go about researching this stuff.
I would assume if you could read the markings and the part wasn't ancient, that finding info would be easy--but I can't get nuthin here?
It is definitely a Motorola diode. The labeling is clear and complete, it has the Motorola "M" clearly printed on it, and there's pictures of other similar diodes in Google if you search there for 'tiny Motorola diode'.
My mega328 parts tester says it's a diode: Uf = 767mv and C = 139pf.
It is a thru-hole part and the body is pretty small, maybe 1.5mm x 3mm, with thin leads, maybe 26ga.
Since the resistors are NOS carbon-composition, the diode may be older as well. It may be discontinued or superseded by another part# now.
The labeling is horizontal around the diode body and reads as follows:
MK (the M is the Motorola M logo inside a circle)
57
58
93
49
????
On some other diodes the first number indicates the general series of the diode, as in this page-
https://electronics.stackexchange.com/questions/56056/identify-these-diodes
But that doesn't work here. If I google for "motorola diode 57" I just get page 57 of the Motorola catalog, or page 57 of other electronics parts catalogs.
I have diode assortments around with all the common stuff, I don't need it for anything so it's not really critical. I'm more curious about how to go about researching this stuff.
I would assume if you could read the markings and the part wasn't ancient, that finding info would be easy--but I can't get nuthin here?