Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

Reference Application

variety of applications. The maximum voltage rating of the TBU

device should never be exceeded. Where necessary, an OVP

should be employed to limit the maximum voltage. A cost-

See “Trigger Current vs External Resistor Value” graph for

selecting the optimum trigger current value using a 0 ohm –

50 ohm resistor value.

Note: Line Resistance =

technology, placed in the system circuit will monitor the

current with the MOSFET detection circuit triggering to provide

an effective barrier behind which sensitive electronics are not

exposed to large voltages or currents during surge events. The

block all voltages including the surge up to rated limits.

®

device will automatically reset on lines which have no DC bias

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

one method used to accomplish this. Bourns application

engineers can provide further assistance.

Basic TBU Operation

Performance Graphs

Typical Trigger Current vs. Temperature

Equip.

OVP

OVP

Line

Line

TBU

®

Device

TBU

External

Resistor

®

Device

R

External

Resistor

R

Typical V-I Characteristics (TBU-CX050-VTC-WH with Rext = 1

Ω)

CURRENT

(100 mA/div)

VOLTAGE

(5 V/div)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

-75

-50

-25

0

25

50

75

100 125

Junction Temperature (°C)