High-voltage, power transient suppressors increase port protection

February 11, 2015 // By Graham Prophet
For AC line and high power DC clamping applications, an extended device range offers increased bidirectional port protection.

Bourns’ expanded high voltage Power Transient Voltage Suppressor (PTVS) product line provides bidirectional port protection from 170 to 430V; nine new PTVS devices are designed to meet stringent IEC 61000-4-5 8/20 μsec current surge requirements in a broad variety of AC line and high-power DC clamping applications such as those in exposed AC/DC power supplies in outdoor environments. An advantage for customers is that PTVS silicon-based technology delivers lower clamping voltage under surge, greater performance stability and increased reliability compared to the capabilities offered from typical competing MOV technology. These Bourns PTVS products also offer an excellent surge response versus temperature; the typical maximum surge current at 150 °C exceeds 70 % of their rated value at 25 °C.

Bourns Model

Repetitive Standoff Voltage - VWM

Peak Current Rating per 8/20 μs - IPPM

PTVS10-170C-TH

170 V

10 kA

PTVS10-320C-TH

320 V

10 kA

PTVS10-380C-TH

380 V

10 kA

PTVS10-430C-TH

430 V

10 kA

PTVS10-470C-TH

470 V

10 kA

PTVS6-380C-TH

380 V

6 kA

PTVS6-430C-TH

430 V

6 kA

PTVS3-380C-TH

380 V

3 kA

PTVS3-430C-TH

430 V

3 kA

“Avoiding damage to the power supply by limiting the peak surge voltage to an acceptable level without short-circuiting the line for an extended period of time is essential to minimise downtime in critical systems and should help avoid costly maintenance calls,” said Ben Huang, product line manager at Bourns.

As a pricing reference, the Bourns Model PTVS6-430C-TH is priced at $72.60 each in 10 piece quantities.

Bourns; www.bourns.com/ProductLine.aspx?name=power_tvs_products