TVB170SC datasheet(2/12 Pages) MACOM

2 / 12 page

340 SiBar Thyristor Surge Protectors

Raychem Circuit Protection

Selection Guide for SiBar Thyristor Surge Protectors

Step 1. Determine the circuit’s operating parameters.

Fill in the following information about the circuit:

Maximum ambient operating temperature ______________________

Maximum DC supply voltage (V

DC Max..) ________________________

Maximum ringing (AC) voltage (V

AC Max.)

______________________

System voltage damage threshold

__________________________

Maximum fault current and duration

__________________________

Maximum system operating current

__________________________

Applicable industry requirements

__________________________

Step 2. Calculate the maximum operating voltage of your system.

Maximum operating voltage = V

DC Max. + (1.414 x VAC Max.)

Refer to Table V1 to select a SiBar thyristor device with a maximum off-

state voltage (V

DM) rating that is close to, but greater than, the maxi-

mum operating voltage of your system.

Step 3. Verify that the system voltage damage threshold is

greater than the rated maximum breakover voltage (V

BO).

Refer to Table V1 to confirm that the maximum breakover voltage of the

device you selected in Step 2 is less than the system voltage damage

threshold.

TVB170SC Datasheet(PDF) 2 Page - Tyco Electronics