TBU-KE Datasheet, PDF (1/6 Pages) Bourns Electronic Solutions – High Speed Protectors

*RoHS ^COMPLIANT
00E722550
Features
■ Superior circuit protection
■ Overcurrent and overvoltage protection
■ Blocks surges up to rated limits
■ High speed performance
■ Small SMT package
■ RoHS compliant*
■ Agency recognition:
Applications
■ Set top box LNB ports
■ Protection modules and dongles
■ Process control equipment
■ Test and measurement equipment
■ General electronics
TBU-KE Series - TBU^® High Speed Protectors
General Information
The TBU-KE Series of Bourns^® TBU^®
(Transient Blocking Unit) products are very
Line Side
low capacitance unidirectional high speed
surge protection components designed to protect
against faults caused by short circuits, AC
power cross, induction and lightning surges.
1
2
TBU^® Device
Load Side
The TBU-KE is a unidirectional TBU^® device: the TBU^® protector will trip in less than
1 μs when the current reaches the maximum value in one direction only, that is when
Pin 1 is positive in voltage with respect to Pin 2. No current limiting exists in the oppo-
site polarity, and the TBU^® protector appears as resistive in nature. The reverse current
should not exceed the maximum trip current level of the TBU^® device. An external
diode may be used to prevent reverse current in DC biased applications.
The TBU^® protector blocks surges and provides an effective barrier behind which sen-
sitive electronics will not be exposed to large voltages or currents during surge events.
After the surge, the TBU^® device resets when the voltage across the TBU^® device falls
to the V_reset level. The TBU^® device will automatically reset on lines which have no DC
bias or have DC bias below V_reset (such as unpowered signal lines).
The TBU^® device is provided in a surface mount DFN package and meets industry
standard requirements such as RoHS and Pb Free solder reflow profiles.
Agency Approval
Description
UL
File Number: E315805
Absolute Maximum Ratings (@ T_A = 25 °C Unless Otherwise Noted)
Symbol Parameter
Part Number
Value
Unit
TBU-KE025-xxx-WH
250
V_imp
Peak impulse voltage withstand with duration less than 10 ms TBU-KE040-xxx-WH
400
V
TBU-KE050-xxx-WH
500
V_rms
Continuous A.C. RMS voltage
TBU-KE025-xxx-WH
100
TBU-KE040-xxx-WH
200
V
TBU-KE050-xxx-WH
250
T_op
Operating temperature range
T_stg
Storage temperature range
-40 to +85
°C
-65 to +150
°C
Asia-Pacific: Tel: [phone] • Fax: [phone]
Europe: Tel: [phone] • Fax: [phone]
The Americas: Tel: [phone] • Fax: [phone]
www.bourns.com
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.