Features
■ Formerly brand
■ Extremely high speed performance
■ Low impedance
■ Two TBU® protectors in one small package
■ Very high bandwidth, GHz compatible
■ Simple, superior circuit protection
■ RoHS compliant*, UL Recognized
Applications
■ xDSL (ADSL, VDSL, VDSL2)
■ High Data Rate Interface IC protection
(LVDS, HDMI, etc.)
■ Industrial sensors and controls
■ General electronics
P40-G Series TBU® High-Speed Protectors
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Transient Blocking Units - TBU® Devices
Bourns® Model P40-G products are high-speed bidirectional
protection components, constructed using MOSFET semicon-
ductor technology, designed to protect against faults caused by
short circuits, AC power cross, induction and lightning surges.
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
refl ow profi les.
Electrical Characteristics (Tamb = 25 °C)
The P40-G Series TBU® high-speed protector is bidirectional; specifi cations are valid in both directions.
Symbol Parameter Min. Typ. Max. Unit
Iop Maximum current through the device that will not cause current blocking 240 mA
Itrigger
Typical current for the device to go from normal operating state to protected
state 350 mA
Iout Maximum current through the device 480 mA
Rdevice Series resistance of the TBU® device 3.6 4.2 Ω
Rbal Line-to line series resistance difference between two TBU® devices 5 %
tblock
Maximum time for the device to go from normal operating state to protected
state 0.2 µs
Iquiescent Current through the triggered TBU® device with 40 Vdc circuit voltage 0.7 mA
Vreset Voltage below which the triggered TBU® device will transition to normal
operating state 7 V
Absolute Maximum Ratings (Tamb = 25 °C)
Symbol Parameter Value Unit
Vimp Maximum protection voltage for impulse faults with rise time ≥ 1 µsec 40 V
Vrms Maximum protection voltage for continuous Vrms faults 28 V
Top Operating temperature range -40 to +85 °C
Tstg Storage temperature range -65 to +150 °C
Agency Approval
UL recognized component File # E315805.
Industry Standards
Description Model
Telcordia GR-1089 P40-G
ITU-T K.20, K.20E, K.21, K.21E, K.45
*RoHS COMPLIANT
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Typical Performance Characteristics
P40-G Series TBU® High-Speed Protectors
V-I Characteristics Time to Block vs. Fault Current
Trigger Current vs. Temperature
-Itrigger
Vreset
-Vreset
Itrigger
+V
+I
Time to Block vs. Fault Current
0.0000001
0.000001
0.00001
0.0001
0.001
0.01
0.1
1
0.1 1 10 100 1000
Fault Current
(
A
)
Time to Block (sec)
20
40
60
80
100
120
140
-40 -20 0 20 40 60 80
Temperature (°C)
% of Trigger Current
P40-G Series TBU® High-Speed Protectors
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Operational Characteristics
P40-G Lightning Protection 40 V
The graph below demonstrates the operational characteristics of the TBU® device. In the graph below the fault voltage, protected side
voltage, and current is presented.
P40-G
Load
V1
Line1
Line2
TEST CONFIGURATION DIAGRAM
1 µs/div.
10 V/div.
400 mA/div.
Ch1 V1 Ch3 Current
1
3
PIN 1
A
B
D
C
4 65
31
2
FF
J
N
N
H
M
KK
E
TOP VIEW SIDE VIEW BOTTOM VIEW
J
G
G
H
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
P40-G Series TBU® High-Speed Protectors
Product Dimensions
DIMENSIONS: MM
(INCHES)
Dim. Min. Typ. Max.
A 3.90
(.154)
4.00
(.157)
4.10
(.161)
B3.90
(.154)
4.00
(.157)
4.10
(.161)
C0.80
(.031)
0.85
(.033)
0.90
(.035)
D0.000
(.000)
0.025
(.001)
0.050
(.002)
E 2.55
(.100)
2.60
(.102)
2.65
(.104)
F0.20
(.008)
0.25
(.010)
0.30
(.012)
G0.75
(.030)
0.80
(.031)
0.85
(.033)
H1.40
(.055)
1.45
(.057)
1.50
(.059)
J0.10
(.004)
0.15
(.006)
0.20
(.008)
K0.25
(.010)
0.30
(.012)
0.35
(.014)
M0.55
(.022)
0.60
(.024)
0.65
(.026)
N0.20
(.008)
0.25
(.010)
0.30
(.012)
Recommended Pad Layout
Pad # Apply
1 In1
2NC
3 Out1
4 Out2
5NC
6 In2
NC = Solder to PCB; do not make electrical
connection, do not connect to ground.
Pad Designation
TBU® devices have matte-tin termination fi nish. Suggested layout should use non-solder
mask defi ne (NSMD). Recommended stencil thickness is 0.10-0.12 mm (.004-.005 in.) with
stencil opening size 0.025 mm (.0010 in.) less than the device pad size. As when heat
sinking any power device, it is recommended that, wherever possible, extra PCB copper area
is allowed. For minimum parasitic capacitance, do not allow any signal, ground or power
signals beneath any of the pads of the device.
Thermal Resistances
Symbol Parameter Value Unit
Rth(j-a) Junction to Package Pads (1 TBU of Pair) 250 °C/W
Rth(j-a) Junction to Package Pads (2 TBUs of Equal Power) 180 °C/W
Block Diagram
64
3
TBU® Device
1
0.90
(.035)
0.30 +0.05/-0.00
(.012 +.002/-.000)
0.35
(.014)
1.45
(.057)
0.30
(.012)
2.60
(.102)
Thermal resistance using minimal pad size, where the power is the total power dissipated in the package. Additional copper pad area to be
used for additional heatsinking is also recommended.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
P40-G Series TBU® High-Speed Protectors
Refl ow Profi le
Profi le Feature Pb-Free Assembly
Average Ramp-Up Rate (Tsmax to Tp) 3 °C/sec. max.
Preheat
- Temperature Min. (Tsmin)
- Temperature Max. (Tsmax)
- Time (tsmin to tsmax)
150 °C
200 °C
60-180 sec.
Time maintained above:
- Temperature (TL)
- Time (tL)
217 °C
60-150 sec.
Peak/Classifi cation Temperature (Tp) 260 °C
Time within 5 °C of Actual Peak Temp. (tp) 20-40 sec.
Ramp-Down Rate 6 °C/sec. max.
Time 25 °C to Peak Temperature 8 min. max.
Typical Part MarkingHow to Order
P 40 - G 240 - WH
Form Factor
P = Two TBU® protectors in one device
Impulse Voltage Rating
40 = 40 V
Directional Indication
G = Bidirectional
Iop Indicator
240 = 240 mA
MARKING NUMBER
04GC = P40-G240-WH
MANUFACTURER’S
TRADEMARK*
PIN 1
MANUFACTURING
DATE CODE*
- 1ST DIGIT INDICATES THE YEAR’S 6-MONTH PERIOD.
- 2ND DIGIT INDICATES THE WEEK NUMBER IN THE 6-MONTH PERIOD.
- 3RD & 4TH DIGITS INDICATE SPECIFIC LOT FOR THE WEEK.
6-MONTH PERIOD CODES:
A = JAN-JUN 2009 C = JAN-JUN 2010 E = JAN-JUN 2011
B = JUL-DEC 2009 D = JUL-DEC 2010 F = JUL-DEC 2011
EXAMPLE: ARBC
- 1ST DIGIT ‘A’ = JAN-JUN 2009
- 2ND DIGIT ‘R’ = WEEK 18; WEEK OF APRIL 27
- 3RD & 4TH DIGITS ‘BC’ = LOT SPECIFIC INFORMATION
*TRANSITION FROM FULTEC TRADEMARK AND LOT CODE
TO BOURNS TRADEMARK AND DATE CODE IN 2009.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
P40-G Series TBU® High-Speed Protectors
Packaging Specifi cations (per EIA468-B)
B
A
DC
NF
G (MEASURED AT HUB)
USER DIRECTION OF FEED
K0
B0
P2
D1
CENTER
LINES OF
CAVITY
EMBOSSMENT
tD
P0
TOP
COVER
TAPE
E
W
P
A0
DIMENSIONS: MM
(INCHES)
Device A B C D G N
Min. Max. Min. Max. Min. Max. Min. Max. Ref. Ref.
P40-G240 326
(12.835)
330.25
(13.002)
1.5
(.059)
2.5
(.098)
12.8
(.504)
13.5
(.531)
20.2
(.795) - 12.4
(.488)
102
(4.016)
Device A0 B
0 D D1 E F
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. max.
P40-G240 4.2
(.165)
4.4
(.173)
4.2
(.165)
4.4
(.173)
1.5
(.059)
1.6
(.063)
1.5
(.059) -1.65
(.065)
1.85
(.073)
5.45
(.216)
5.55
(.219)
Device K0P P0 P
2 t W
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
P40-G240 1.05
(.041)
1.25
(.049)
7.9
(.311)
8.1
(.319)
3.9
(.159)
4.1
(.161)
1.9
(.075)
2.1
(.083)
0.25
(.010)
0.35
(.014)
11.7
(.461)
12.3
(.484)
QUANTITY: 3000 PIECES PER REEL
1 µs/div.
400 V/div.
200 mA/div.
Ch1 V1 Ch3 Current
1
3
Model P40-G Series - High Speed Surge Protectors
Reference Application
A cost-effective protection solution combines the Bourns® TBU® protection device with a diode bridge on the driver side of the
transformer and GDTs on the line side. The GDT should have a minimum DCBD of 900 V and a maximum sparkover voltage of 1600
V. The diagram below illustrates a common confi guration of these components. The graph demonstrates the operational characteristics
of the circuit.
Common Confi guration Diagram - xDSL Protection
5000 V Lightning 2/10 μsec, 500 A
REV. 04/12
“TBU” is a registered trademark of Bourns, Inc. in the United States and other countries.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
P40-G Series TBU® High-Speed Protectors
Ch1
P40
VCC
P40-G
Ch3
Asia-Pacifi c: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
