Features
Applications
■ Formerly
brand
■ Combo voice / xDSL linecards
■ Voice linecards
■ Extremely high speed performance
■ Blocks high voltages and currents
■ Very high bandwidth; GHz compatible
■ Small package, minimal PCB area
■ Simple, superior circuit protection
■ RoHS compliant*, UL Recognized
■ MDF, primary protection modules
■ Process control equipment
■ Test and measurement equipment
■ General electronics
TBU™ C650 and C850 Protectors
Transient Blocking Units - TBU™ Devices
Agency Approval
Bourns® C650 and C850 series products are high speed
bidirectional protection components, constructed using
MOSFET semiconductor technology, designed to protect
against faults caused by short circuits, AC power cross,
induction and lightning surges.
UL recognized component File # E315805.
Industry Standards
Description
Model
The TBU™ high speed protector, triggering as a function of
the MOSFET, blocks surges and provides an effective barrier
behind which sensitive electronics are not exposed to large
voltages or currents during surge events. 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.
C650
C850
GR-1089
Port Type 1, 3, 5
Telcordia
ITU-T
C650
C850
GR-974
K.20, K.20E, K.21, K.21E, K.45
C850
Absolute Maximum Ratings (T
= 25 °C)
amb
Symbol
Parameter
Maximum protection voltage for impulse faults with rise time ≥ 1 µsec
Value
Unit
C650-xxx-WH
C850-xxx-WH
650
850
V
V
V
V
imp
C650-xxx-WH
C850-xxx-WH
300
425
Maximum protection voltage for continuous V
faults
rms
rms
T
T
Operating temperature range
Storage temperature range
-40 to +85
°C
°C
op
-65 to +150
stg
Electrical Characteristics (T
= 25 °C)
amb
Symbol
Parameter
Min.
Typ.
Max.
Unit
Cx50-100-WH
Cx50-180-WH
Cx50-260-WH
100
180
260
Maximum current through the device that will not cause
current blocking
I
I
I
mA
op
Cx50-100-WH
Cx50-180-WH
Cx50-260-WH
150
220
330
Typical current for the device to go from normal operating
state to protected state
mA
mA
trigger
out
Cx50-100-WH
Cx50-180-WH
Cx50-260-WH
200
360
520
Maximum current through the device
Series resistance of the TBU™ device
C650-100-WH
C650-180-WH
C650-260-WH
C850-100-WH
C850-180-WH
C850-260-WH
12
8
8
17
11
11
14.5
10
10
19
14
Ω
R
TBU
14
Maximum time for the device to go from normal operating
state to protected state
t
1
µs
mA
V
block
Current through the triggered TBU™ device with 50 Vdc circuit
voltage
I
1
quiescent
Voltage below which the triggered TBU™ device will transition to
normal operating state
V
14
reset
C650 and C850 TBU™ protectors are bidirectional; specifications are valid in both directions.
*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.
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