Features
Applications
nꢀ Superiorꢀcircuitꢀprotectionꢀ
nꢀ Overcurrentꢀprotection
nꢀ Blocksꢀsurgesꢀupꢀtoꢀratedꢀvoltageꢀlimit
nꢀ High-speedꢀperformance
nꢀ SmallꢀSMTꢀpackage
nꢀ RS-485ꢀinterfaces
nꢀ Exposedꢀsenseꢀandꢀdataꢀlines
nꢀ Factoryꢀautomation
nꢀ Protectionꢀmodulesꢀandꢀdongles
nꢀ Processꢀcontrolꢀequipment
nꢀ Testꢀandꢀmeasurementꢀequipment
nꢀ Generalꢀelectronics
F553
5380
0
2
nꢀ RoHSꢀcompliant*
TBU-DF Series - TBU® High-Speed Protectors
General Information
The TBU-DF Series of Bourns® TBU® products are low capacitance dual bidirectional high-speed Electronic
Current Limiters (ECLs), constructed using MOSFET semiconductor technology, and designed to protect
against faults caused by short circuits, overvoltage transients and faults in battery cells, up to rated limits.
Line 1 I/O
Line 2 I/O
1
6
3
4
Line 1 I/O
Line 2 I/O
The TBU® high-speed protector placed in the system circuit will monitor the current with the MOSFET detec-
tion circuit triggering to provide an effective barrier behind which sensitive electronics will not be exposed to
large voltages or currents during transient events.
®
TBU Device
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.
Absolute Maximum Ratings (@ T = 25 °C Unless Otherwise Noted)
A
Symbol
Parameter
Part Number
Value
550
850
250
425
-55 to +125
-65 to +150
+125
Unit
TBU-DF055-xxx-WH
TBU-DF085-xxx-WH
TBU-DF055-xxx-WH
TBU-DF085-xxx-WH
V
V
Peak impulse voltage withstand with duration less than 10 ms
V
imp
Continuous A.C. RMS voltage
Operating temperature range
Storage temperature range
Maximum Ambient Temperature
V
rms
op
T
T
T
°C
°C
°C
stg
amax
Electrical Characteristics (@ T = 25 °C Unless Otherwise Noted)
A
Symbol
Parameter
Part Number
TBU-DFxxx-050-WH
TBU-DFxxx-300-WH
TBU-DFxxx-500-WH
Min.
50
300
500
Typ.
75
450
750
Max.
100
600
Unit
Current required for the device to go from operating state to
protected state
I
mA
trigger
1000
V
V
V
= 550 V I
= 550 V I
= 550 V I
(min.) = 50 mA TBU-DF055-050-WH
(min.) = 300 mA TBU-DF055-300-WH
(min.) = 500 mA TBU-DF055-500-WH
12
6
5
26
14
13
imp
imp
imp
trigger
trigger
trigger
Series resistance of
the TBU® device
Ω
R
R
device
V
V
V
= 850 V I
= 850 V I
= 850 V I
(min.) = 50 mA TBU-DF085-050-WH
(min.) = 300 mA TBU-DF085-300-WH
(min.) = 500 mA TBU-DF085-500-WH
23
15
12
38
26
25
imp
imp
imp
trigger
trigger
trigger
Package resistance matching of the TBU® device #1 - TBU® device #2
Time for the device to go from normal operating state to protected state
Current through the triggered TBU® device with 50 Vdc circuit voltage
Voltage below which the triggered TBU® device will transition to normal operating state
Junction to ambient - FR4 using JESD51-3 board
+0.5
Ω
µs
mA
V
°C/W
°C/W
match
block
Q
t
I
1
0.5
16
125
50
V
12
20
reset
R
R
th(j-a)
th(j-a)
Junction to ambient - FR4 using JESD51-7 board
Environmental Characteristics
Parameter
Moisture Sensitivity Level
ESD Classification (HBM)
Value
1
1B
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
*RoHSꢀDirectiveꢀ2015/863,ꢀMarꢀ31,ꢀ2015ꢀandꢀAnnex.
Specificationsꢀareꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.
Usersꢀshouldꢀverifyꢀactualꢀdeviceꢀperformanceꢀinꢀtheirꢀspecificꢀapplications.ꢀ
Theꢀproductsꢀdescribedꢀhereinꢀandꢀthisꢀdocumentꢀareꢀsubjectꢀtoꢀspecificꢀlegalꢀdisclaimersꢀasꢀsetꢀforthꢀonꢀtheꢀlastꢀpageꢀofꢀthisꢀdocument,ꢀandꢀatꢀwww.bourns.com/docs/legal/disclaimer.pdf.
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