TBU-KE025-500-WH Bourns Inc., TBU-KE025-500-WH Datasheet - Page 3

• Manufacturer Part Number: TBU-KE025-500-WH
• Description: SURGE SUPP TBU 500MA 250VIMP SMD
• Manufacturer: Bourns Inc.
• Series: TBU™r

Specifications of TBU-KE025-500-WH

• Package / Case: 2-VDFN Exposed Pad
• Voltage - Working: 100V
• Voltage - Clamping: 250V
• Technology: Mixed Technology
• Number Of Circuits: 1
• Applications: General Purpose
• Voltage Rating: 100 V
• Current Rating: 750 mA
• Termination Style: SMD/SMT
• Operating Voltage: 250V
• Diode Case Style: DFN
• No. Of Pins: 2
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: TBU-KE025-500-WHTR

The TBU
voltage surges in DC biased equipment, as shown in the fi gure
below. Diode D1 prevents reverse voltage surges from damaging
the equipment, and the TBU
surges from causing damage. An overvoltage protection device,
such as an MOV, may be used to provide additional overvolt-
age protection if the surge voltage is likely to be above the
maximum rating of the TBU
should be greater than that of the OVP device at the maximum
surge current level. Typically, a 1N4007 is a suitable choice. D2
should be chosen to be above the normal working voltage of
the protected device, but below its absolute maximum rating.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Line
Side
Reference Application
Performance Graphs
V-I Characteristic - TBU-KE050-300-WH (Pin 2-1)
TBU-KE Series - TBU
®
device can be used to protect against excessive
OVP
D1
(100 mA/div.)
CURRENT
TBU
1
®
Device
®
®
device. D1 reverse voltage rating
protector prevents any positive
2
®
D2
High Speed Protectors
I TRIGGER
VOLTAGE
(5 v/div.)
V RESET
Equip.
The TBU
device which is placed in series with a signal path. The TBU
device operates in approximately 1 µs - once line current
exceeds the TBU
ated, the TBU
typically. When operated, the TBU
voltages and any other voltages including the surge up to
rated limits.
After the surge, the TBU
across the TBU
vice will automatically reset on lines which have no DC bias or
have DC bias below V
If the line has a normal DC bias above V
across the TBU
surge. In such cases, special care needs to be taken to ensure
that the TBU
manual power down will be required. Bourns application
engineers can provide further assistance.
Typical Trigger Current vs. Temperature
Basic TBU Operation
®
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
device is a silicon-based, solid-state, resettable
-75 -50 -25
®
®
device will reset, otherwise an automatic or
®
®
device restricts line current to less than 1 mA
device falls to the V
device may not fall below V
®
Junction Temperature (°C)
device’s trigger current I
reset
®
device resets when the voltage
(such as unpowered signal lines).
0
25 50 75 100 125 150
®
device will block all system
reset
reset
level. The TBU
trigger
, the voltage
reset
. When oper-
after the
®
de-
®