I did write the person who commented on the YT video about it being a TVS. Basically, I am looking for a suggested part number. I have no doubts that a TVS could be found in this type of package but they do appear rare. Not something I would expect to see in a commercial grade modem when plastic packages are widely available.
I did write the person who commented on the YT video about it being a TVS. Basically, I am looking for a suggested part number. I have no doubts that a TVS could be found in this type of package but they do appear rare. Not something I would expect to see in a commercial grade modem when plastic packages are widely available.
TVS/zener at least do come in this package. Find at least one GDT part number that comes in such package as well.
I don't see a need for glass-packaged TVS as there is no gas envelope, like in a GDT.
Hermetic-packaged TVS are MIL spec.
by Sensitron.
I don't see a need for glass-packaged TVS as there is no gas envelope, like in a GDT.
Hermetic-packaged TVS are MIL spec. by Sensitron.
Then why tons of diodes and zener diodes come in glass package?
Small switching diodes in glass hermetically-sealed packages are widely available, like DO-35, DO-41, MELF etc. I don't remember ever seeing TVS in glass packages.
I think the difficulty is to gas-fill these with say, neon to make a GDT. Or to make these larger for more power handling, for a big die (TVS) or electrodes (GDT).
joeqsmith's part, might have been:
Mitsubishi DA53Ruilon china RL501 series 0.5kA 2mm dia. x 4mm.
Small switching diodes in glass hermetically-sealed packages are widely available, like DO-35, DO-41, MELF etc. I don't remember ever seeing TVS in glass packages.
I think the difficulty is to gas-fill these with say, neon to make a GDT. Or to make these larger for more power handling, for a big die (TVS) or electrodes (GDT).
joeqsmith's part, might have been:
Mitsubishi DA53
Ruilon china RL501 series 0.5kA 2mm dia. x 4mm.
They are both axial, not a MELF. Rare parts in a commercial product would make no sense at all.
It makes sense as there is no impulse standard for cable modems that I know of. What size GDT is suitable?
GDT's meet Telecom and Mains standards such as UL1449, UL497B, FCC Part 68 etc. so they are sized large.
A tiny GDT is off the radar and has no approvals, maybe a 0.5-1kA rating.
RLM501 MELF 0.5kA 2.1mm dia.
RLM102 MELF 1kA 2.8mm dia.
Yes, GDTs in a MELF package seem common. I have not heard back from the person who posted on the YT video. Waiting to see this glass MELF TVS they feel would go into a cheap modem.
It's many questions that little GDT raises, RIP. I understand multimeter protection circuits and 61010 well enough to get equipment designs certified.
The Sanwa PM300
using a slightly larger GDT with no MOV's, "The world's only CAT IV IEC61010 rated true pocket sized multimeter"
Seems strange a little GDT can pull it off, no MOV's required? Zotek and ANENG jump on board.
You and I know the let-through/follow-through current would be a catastrophe in this crappy scheme.
Looking at the
PM300 approvals test report it appears fake- 61010 ESD tested to 4kV, but no mains transient testing. The
PM300 product manual states that wonderful term "designed to" which is not certified to...
You think a little GDT can achieve multimeter 61010 approvals?