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breakdown voltage on a Transient Voltage Suppressor

Models 2601, 2602, 2611, 2612, 2635, 2636
Models 2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Models 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
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jaime_g
Posts: 93
Joined: September 23rd, 2014, 6:14 am
Country: United States

breakdown voltage on a Transient Voltage Suppressor

Post by jaime_g » February 19th, 2019, 11:29 am

How can I measure the breakdown voltage of a bidirectional Transient Voltage Suppressor? The test current is 1 mA and the max Vbr specified limit is 320V

Andrea C
Keithley Applications
Keithley Applications
Posts: 1436
Joined: October 15th, 2010, 10:35 am
Country: United States
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Re: breakdown voltage on a Transient Voltage Suppressor

Post by Andrea C » February 21st, 2019, 4:25 am

If you have a dual channel, 200V SourceMeter model such as the 2612B, you can wire the channels in series to effectively have a 400V SMU.

Revision D of the 2600B has a section on combining SMU channels.
https://www.tek.com/keithley-source-mea ... r-manual-8

Do you want to force 1mA with a 200v limit with one SMU while second SMU provides a 200V bias with current limit high enough to not interfere with first SMU?
Or you could sweep the voltage and measure the current of one SMU while second SMU provides a 200V bias, and look for the "hockey stick" breakdown in the resulting IV curve.

jaime_g
Posts: 93
Joined: September 23rd, 2014, 6:14 am
Country: United States

Re: breakdown voltage on a Transient Voltage Suppressor

Post by jaime_g » March 4th, 2019, 5:05 pm

Hi Andrea,

I think I will use the 2410 SMU to measure the breakdown voltage of the transient voltage suppressors from Mricosemi because they have the voltage range needed (up to 1000V) to clamp the breakdown voltage measurement at 350V. I see that I can use the following scripts:

2410 source code to generate a 1mA, 100ms reverse current pulse for a unidirectional TVS :
*RST
:SENS:FUNC:CONC OFF
:SOUR:FUNC CURR
:SENS:FUNC ‘VOLT:DC’
:SENS:VOLT:PROT (use compliance voltage level)
:SOUR:CURR:MODE LIST
:SOUR:LIST:CURR -0.001
:TRIG:COUN 1
:SOUR:DEL 0.1
:OUTP ON
:READ?

2410 source code to generate ta +1mA, and -1mA 100ms reverse current pulse for the bidirectional TVS is:
*RST
:SENS:FUNC:CONC OFF
:SOUR:FUNC CURR
:SENS:FUNC ‘VOLT:DC’
:SENS:VOLT:PROT (use compliance voltage level)
:SOUR:CURR:MODE LIST
:SOUR:LIST:CURR -0.001, 0.001
:TRIG:COUN 2
:SOUR:DEL 0.1
:OUTP ON
:READ?

Regards,

Jaime

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