Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

Reference Application

voltage surges in transformer coupled equipment, as shown in

causing damage. An overvoltage protection device, such as an

MOV or GDT, may be used to provide additional overvoltage

protection if the surge voltage is likely to be above the maximum

device operates in approximately 1 µs - once line current

voltages and any other voltages including the surge up to

rated limits.

vice will automatically reset on lines which have no DC bias or

surge. In such cases, special care needs to be taken to ensure

manual power down will be required. Bourns application

engineers can provide further assistance.

Basic TBU Operation

Performance Graphs

V-I Characteristic - TBU-DT085-300-WH (Pin 2-1 & Pin 3-4)

Typical Trigger Current vs. Temperature

Load

OVP

OVP

Line

Side

12

43

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

-75 -50 -25

0

25

50

75 100 125 150

Junction Temperature (°C)

CURRENT

(100 mA/div.)

VOLTAGE

(5 v/div.)

VRESET

ITRIP