Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

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. 06/12

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