Reference Application

The C-series devices are general protectors that can be used in a variety of applications. The basic operation of the device will be

demonstrated using the single line application shown in the figure below. The test circuit was subjected to a 1000 V, 10/700 µs surge

waveform. The devices used were the TBU-C850-100-WH and a 2031-42T-SM-RPLF GDT (OVP) with a 10 ohm resistor for the load

impedance.

to finite reaction time for fast transients, the peak level may exceed the low frequency data sheet maximum for a very short period,

of 1 mA, typically. As the input line voltage increases to about 500 V, the GDT is triggered, reducing the input line voltage to a very low

in this example. Only the first 4 µs of the surge are shown in the graph. For surges or AC voltages below the GDT breakover voltage,

General Application Circuit

“TBU” is a registered trademark of Bourns, Inc. in the United States and other countries.

REV. 09/15

ZLOAD

Line

OVP

1000

800

600

400

200

0

-200

-400

-600

-800

-1000

900

800

700

600

500

400

300

200

100

0

100

0

0.5

1

1.5

2

2.5

3

3.5

4

Time (µs)

GDT Voltage

TBU-C850-100-WH Response to a 1000 V, 10/700 µs Surge

Specifications are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.

Users should verify actual device performance in their specific applications.