Nexperia
PTVS20VU1UPA
300 W Transient Voltage Suppressor
PTVS20VU1UPA All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet 12 June 2017 9 / 14
10. Application information
The device is designed for the protection of one unidirectional data line from surge pulses and ESD
damage. The device is suitable on lines where the signal polarities are either positive or negative
with respect to ground.
aaa-019403
GND
line to be protected
(positive signal polarity)
TVS diode
unidirectional protection of one line
GND
line to be protected
(negative signal polarity)
TVS diode
Fig. 15. Application diagram
Circuit board layout and protection device placement
Circuit board layout is critical for the suppression of ESD, Electrical Fast Transient (EFT) and surge
transients. The following guidelines are recommended:
1. Place the device as close to the input terminal or connector as possible.
2. Minimize the path length between the device and the protected line.
3. Keep parallel signal paths to a minimum.
4. Avoid running protected conductors in parallel with unprotected conductors.
5. Minimize all Printed-Circuit Board (PCB) conductive loops including power and ground loops.
6. Minimize the length of the transient return path to ground.
7. Avoid using shared transient return paths to a common ground point.
8. Use ground planes whenever possible. For multilayer PCBs, use ground vias.
