Help, what model is this component? Looks like a discharge tube

[daisizhou]

Hello everyone。I came across a component that looks like a discharge tube,It looks like a diode, but I think it's more like a discharge tube
I didn't find its data, if you know the data or know the exact model please let me know, thanks

[jonpaul]

Teccor Transients Absorbing Zener  TAZ

j

[daisizhou]

Can you know the exact model?

[fzabkar]

What is the application?

[daisizhou]

They are at the input end of ECG lead line,These pipes sometimes conduct (100k-300k), but they are normal after heating, so I don't know whether the components are damaged or normal, so I want to know the exact model and query the parameters

[fzabkar]

As I understand it, the input protection is required to protect the instrument from the high voltages produced by a defibrillator.

https://www.medteq.net/article/iec-60601-1-defibrillator-protection-design-test

http://www.medteq.info/med/files/Image/defib/ECG.png

Apparently, the relevant standard is IEC 60601-2-27:2005.

Could these be bidirectional 860V devices (sidactor)? Or 86V devices?

Here is a complete catalogue from 2004:
https://web.archive.org/web/20040414135933/http://www.teccor.com/web/PDF%20Files/Telecom/Complete.pdf
https://web.archive.org/web/20021209163418/http://teccor.com/web/menuitems/downloads/datasheets.htm#ds_sidactor

[jonpaul]

for sure Teccor trademark, the bidirectional Sidactor (TM) is a unique 4 layer protector ideal for,such use.

A TAZ or gas gap cannot be used.

In patient connected medical device like EKG, ECG, etc the liabilities, legal and compliance JP have,stick government requirements for the device design, manufacture and services.

Any part replacement, substitution or modification generally invalidites  the approvals.

Consult your country's medical device regulations

Jon

[daisizhou]

Ok, I understand. Thank you for your help

[daisizhou]

Ok,Thank you for your help

[fzabkar]

for sure Teccor trademark, the bidirectional Sidactor (TM) is a unique 4 layer protector ideal for,such use.

A TAZ or gas gap cannot be used.

https://www.medteq.net/article/iec-60601-1-defibrillator-protection-design-test

Manufacturers normally comply with the basic differential requirement by using a shunt arrangement: a component such as gas tube spark gap or MOV is placed in parallel with the leads, and shunts the energy away from the internal circuits.

I would have thought that a spark gap or MOV would be too slow. :-?