VISHAY SI7212DN_09

Si7212DN
Vishay Siliconix
Dual N-Channel 30-V (D-S) MOSFET
FEATURES
PRODUCT SUMMARY
VDS (V)
RDS(on) (Ω)
30
ID (A)
0.036 at VGS = 10 V
6.8
0.039 at VGS = 4.5 V
6.6
Qg (Typ.)
7
• Halogen-free According to IEC 61249-2-21
Definition
• 100 % Rg Tested
• Space Savings Optimized for Fast Switching
• Compliant to RoHS Directive 2002/95/EC
APPLICATIONS
• Synchronous Rectification
• Intermediate Driver
PowerPAK® 1212-8
S1
3.30 mm
3.30 mm
1
D1
G1
2
D2
S2
3
G2
4
D1
8
G1
D1
7
G2
D2
6
D2
5
Bottom View
Ordering Information: Si7212DN-T1-E3 (Lead (Pb)-free)
Si7212DN-T1-GE3 (Lead (Pb)-free and Halogen-free)
S1
S2
N-Channel MOSFET
N-Channel MOSFET
ABSOLUTE MAXIMUM RATINGS TA = 25 °C, unless otherwise noted
Parameter
Symbol
10 s
Steady State
Drain-Source Voltage
VDS
30
Gate-Source Voltage
VGS
± 12
TA = 25 °C
Continuous Drain Current (TJ = 150 °C)a
TA = 85 °C
ID
Pulsed Drain Current
V
6.8
4.9
4.9
3.5
IDM
Unit
20
A
Continuous Source Current (Diode Conduction)a
IS
Single Pulse Avalanche Current
IAS
10
A
EAS
5
mJ
L = 0.1 mH
Single Pulse Avalanche Energy
TA = 25 °C
Maximum Power Dissipationa
TA = 85 °C
1.1
2.6
1.3
1.4
0.69
TJ, Tstg
Operating Junction and Storage Temperature Range
Soldering Recommendations (Peak Temperature)
PD
2.2
- 55 to 150
b, c
W
°C
260
THERMAL RESISTANCE RATINGS
Parameter
Maximum Junction-to-Ambienta
Maximum Junction-to-Case (Drain)
Symbol
t ≤ 10 s
Steady State
Steady State
RthJA
RthJC
Typical
Maximum
38
48
77
94
4.3
5.4
Unit
°C/W
Notes:
a. Surface Mounted on 1" x 1" FR4 board.
b. See Solder Profile (www.vishay.com/ppg?73257). The PowerPAK 1212-8 is a leadless package. The end of the lead terminal is exposed
copper (not plated) as a result of the singulation process in manufacturing. A solder fillet at the exposed copper tip cannot be guaranteed and
is not required to ensure adequate bottom side solder interconnection.
c. Rework Conditions: manual soldering with a soldering iron is not recommended for leadless components.
Document Number: 73128
S09-1815-Rev. F, 14-Sep-09
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1
Si7212DN
Vishay Siliconix
SPECIFICATIONS TJ = 25 °C, unless otherwise noted
Parameter
Symbol
Test Conditions
Min.
0.6
Typ.
Max.
Unit
Static
VGS(th)
VDS = VGS, ID = 250 µA
Gate-Body Leakage
IGSS
VDS = 0 V, VGS = ± 12 V
Zero Gate Voltage Drain Current
IDSS
On-State Drain Currenta
ID(on)
Gate Threshold Voltage
Drain-Source On-State Resistancea
Forward Transconductancea
Diode Forward Voltage
a
V
nA
VDS = 30 V, VGS = 0 V
1
VDS = 30 V, VGS = 0 V, TJ = 55 °C
5
VDS ≥ 5 V, VGS = 10 V
RDS(on)
1.6
± 100
µA
20
A
VGS = 10 V, ID = 6.8 A
0.030
0.036
VGS = 4.5 V, ID = 6.6 A
0.032
0.039
gfs
VDS = 10 V, ID = 6.8 A
20
VSD
IS = 2.2 A, VGS = 0 V
0.8
1.2
7
11
Ω
S
V
Dynamicb
Total Gate Charge
Qg
Gate-Source Charge
Qgs
Gate-Drain Charge
Qgd
Gate Resistance
Rg
VDS = 15 V, VGS = 4.5 V, ID = 6.8 A
f = 1 MHz
0.6
3.0
4.5
10
15
12
20
30
45
10
15
15
30
td(on)
Turn-On Delay Time
VDD = 15 V, RL = 15 Ω
ID ≅ 1 A, VGEN = 10 V, Rg = 6 Ω
tr
Rise Time
td(off)
Turn-Off Delay Time
Fall Time
tf
Source-Drain Reverse Recovery Time
trr
nC
2
1.7
IF = 2.2 A, dI/dt = 100 A/µs
Ω
ns
Notes:
a. Pulse test; pulse width ≤ 300 µs, duty cycle ≤ 2 %.
b. Guaranteed by design, not subject to production testing.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
20
20
VGS = 10 V thru 3 V
16
I D - Drain Current (A)
I D - Drain Current (A)
16
12
8
12
8
TC = 125 °C
2V
4
4
25 °C
- 55 °C
0
0.0
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2
0.5
1.0
1.5
2.0
2.5
3.0
0
0.0
0.5
1.0
1.5
2.0
VDS - Drain-to-Source Voltage (V)
VGS - Gate-to-Source Voltage (V)
Output Characteristics
Transfer Characteristics
2.5
3.0
Document Number: 73128
S09-1815-Rev. F, 14-Sep-09
Si7212DN
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
1200
1000
0.04
VGS = 4.5 V
0.03
C - Capacitance (pF)
R DS(on) - On-Resistance (Ω)
0.05
VGS = 10 V
0.02
Ciss
800
600
400
Coss
0.01
200
Crss
0
0.00
0
4
8
12
16
0
20
5
10
20
25
30
VDS - Drain-to-Source Voltage (V)
ID - Drain Current (A)
On-Resistance vs. Drain Current
Capacitance
10
1.6
VDS = 15 V
ID = 6.8 A
VGS = 10 V
ID = 6.8 A
8
1.4
R DS(on) - On-Resistance
(Normalized)
VGS - Gate-to-Source Voltage (V)
15
6
4
2
1.2
1.0
0.8
0
0
3
6
9
12
0.6
- 50
15
- 25
0
Qg - Total Gate Charge (nC)
Gate Charge
50
75
100
125
150
On-Resistance vs. Junction Temperature
20
0.10
R DS(on) - On-Resistance (Ω)
TJ = 150 °C
I S - Source Current (A)
10
TJ = 25 °C
1
0.0
25
TJ - Junction Temperature (°C)
0.08
ID = 6.8 A
0.06
ID = 2 A
0.04
0.02
0.00
0.2
0.4
0.6
0.8
1.0
1.2
VSD - Source-to-Drain Voltage (V)
Source-Drain Diode Forward Voltage
Document Number: 73128
S09-1815-Rev. F, 14-Sep-09
1.4
0
2
4
6
8
10
VGS - Gate-to-Source Voltage (V)
On-Resistance vs. Gate-to-Source Voltage
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Si7212DN
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
0.4
50
0.2
40
0.0
Power (W)
VGS(th) Variance (V)
ID = 250 µA
- 0.2
- 0.4
30
20
10
- 0.6
- 50
- 25
0
25
50
75
100
125
0
0.001
150
0.01
0.1
1
10
TJ - Temperature (°C)
Time (s)
Threshold Voltage
Single Pulse Power
100
600
100
IDM Limited
Limited by R DS(on)*
I D - Drain Current (A)
10
P(t) = 0.001
1
ID(on)
Limited
P(t) = 0.01
P(t) = 0.1
TA = 25 °C
Single Pulse
0.1
P(t) = 1
P(t) = 10
DC
BVDSS Limited
0.01
0.1
1
10
100
VDS - Drain-to-Source Voltage (V)
* VGS > minimum V GS at which R DS(on) is specified
Safe Operating Area, Junction-to-Ambient
2
Normalized Effective Transient
Thermal Impedance
1
Duty Cycle = 0.5
0.2
Notes:
0.1
PDM
0.1
0.05
t1
t2
1. Duty Cycle, D =
t1
t2
2. Per Unit Base = R thJA = 77 °C/W
0.02
3. T JM - TA = PDMZthJA(t)
Single Pulse
4. Surface Mounted
0.01
10-4
10-3
10-2
10-1
1
10
100
600
Square Wave Pulse Duration (s)
Normalized Thermal Transient Impedance, Junction-to-Ambient
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Document Number: 73128
S09-1815-Rev. F, 14-Sep-09
Si7212DN
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
2
Normalized Effective Transient
Thermal Impedance
1
Duty Cycle = 0.5
0.2
0.1
0.1
0.05
0.02
Single Pulse
0.01
10-4
10-3
10-2
10-1
1
Square Wave Pulse Duration (s)
Normalized Thermal Transient Impedance, Junction-to-Case
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see www.vishay.com/ppg?73128.
Document Number: 73128
S09-1815-Rev. F, 14-Sep-09
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Package Information
Vishay Siliconix
D4
PowerPAK® 1212-8, (SINGLE/DUAL)
W
H
E2
E4
L
K
M
θ
e
1
Z
D5
D
D2
2
2
D1
8
1
5
4
θ
4
b
3
L1
E3
A1
Backside View of Single Pad
H
2
E1
E
Detail Z
1
D1
2
K1
Notes:
1. Inch will govern
2
D2
Dimensions exclusive of mold gate burrs
3. Dimensions exclusive of mold flash and cutting burrs
L
K
E2
E4
D2 D3(2x) D4
c
A
H
3
4
b
θ
D5
θ
E3
Backside View of Dual Pad
MILLIMETERS
INCHES
DIM.
MIN.
NOM.
MAX.
MIN.
NOM.
A
0.97
1.04
1.12
0.038
0.041
MAX.
0.044
A1
0.00
-
0.05
0.000
-
0.002
b
0.23
0.30
0.41
0.009
0.012
0.016
0.013
c
0.23
0.28
0.33
0.009
0.011
D
3.20
3.30
3.40
0.126
0.130
0.134
D1
2.95
3.05
3.15
0.116
0.120
0.124
D2
1.98
2.11
2.24
0.078
0.083
0.088
D3
0.48
-
0.89
0.019
-
0.035
D4
0.47 TYP.
D5
2.3 TYP.
0.0185 TYP.
0.090 TYP.
E
3.20
3.30
3.40
0.126
0.130
0.134
E1
2.95
3.05
3.15
0.116
0.120
0.124
E2
1.47
1.60
1.73
0.058
0.063
0.068
E3
1.75
1.85
1.98
0.069
0.073
0.078
0.34 TYP.
E4
0.013 TYP.
e
0.65 BSC
0.026 BSC
K
0.86 TYP.
0.034 TYP.
K1
0.35
-
-
0.014
-
-
H
0.30
0.41
0.51
0.012
0.016
0.020
L
0.30
0.43
0.56
0.012
0.017
0.022
L1
0.06
0.13
0.20
0.002
0.005
0.008
θ
0°
-
12°
0°
-
12°
W
0.15
0.25
0.36
0.006
0.010
0.014
M
0.125 TYP.
0.005 TYP.
ECN: S10-0951-Rev. J, 03-May-10
DWG: 5882
Document Number: 71656
Revison: 03-May-10
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AN822
Vishay Siliconix
PowerPAK® 1212 Mounting and Thermal Considerations
Johnson Zhao
MOSFETs for switching applications are now available
with die on resistances around 1 mΩ and with the
capability to handle 85 A. While these die capabilities
represent a major advance over what was available
just a few years ago, it is important for power MOSFET
packaging technology to keep pace. It should be obvious that degradation of a high performance die by the
package is undesirable. PowerPAK is a new package
technology that addresses these issues. The PowerPAK
1212-8 provides ultra-low thermal impedance in a
small package that is ideal for space-constrained
applications. In this application note, the PowerPAK
1212-8’s construction is described. Following this,
mounting information is presented. Finally, thermal
and electrical performance is discussed.
THE PowerPAK PACKAGE
The PowerPAK 1212-8 package (Figure 1) is a derivative of PowerPAK SO-8. It utilizes the same packaging
technology, maximizing the die area. The bottom of the
die attach pad is exposed to provide a direct, low resistance thermal path to the substrate the device is
mounted on. The PowerPAK 1212-8 thus translates
the benefits of the PowerPAK SO-8 into a smaller
package, with the same level of thermal performance.
(Please refer to application note “PowerPAK SO-8
Mounting and Thermal Considerations.”)
The PowerPAK 1212-8 has a footprint area comparable to TSOP-6. It is over 40 % smaller than standard
TSSOP-8. Its die capacity is more than twice the size
of the standard TSOP-6’s. It has thermal performance
an order of magnitude better than the SO-8, and 20
times better than TSSOP-8. Its thermal performance is
better than all current SMT packages in the market. It
will take the advantage of any PC board heat sink
capability. Bringing the junction temperature down also
increases the die efficiency by around 20 % compared
with TSSOP-8. For applications where bigger packages are typically required solely for thermal consideration, the PowerPAK 1212-8 is a good option.
Both the single and dual PowerPAK 1212-8 utilize the
same pin-outs as the single and dual PowerPAK SO-8.
The low 1.05 mm PowerPAK height profile makes both
versions an excellent choice for applications with
space constraints.
PowerPAK 1212 SINGLE MOUNTING
To take the advantage of the single PowerPAK 1212-8’s
thermal performance see Application Note 826,
Recommended Minimum Pad Patterns With Outline
Drawing Access for Vishay Siliconix MOSFETs. Click
on the PowerPAK 1212-8 single in the index of this
document.
In this figure, the drain land pattern is given to make full
contact to the drain pad on the PowerPAK package.
This land pattern can be extended to the left, right, and
top of the drawn pattern. This extension will serve to
increase the heat dissipation by decreasing the thermal resistance from the foot of the PowerPAK to the
PC board and therefore to the ambient. Note that
increasing the drain land area beyond a certain point
will yield little decrease in foot-to-board and foot-toambient thermal resistance. Under specific conditions
of board configuration, copper weight, and layer stack,
experiments have found that adding copper beyond an
area of about 0.3 to 0.5 in2 of will yield little improvement in thermal performance.
Figure 1. PowerPAK 1212 Devices
Document Number 71681
03-Mar-06
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1
AN822
Vishay Siliconix
PowerPAK 1212 DUAL
To take the advantage of the dual PowerPAK 1212-8’s
thermal performance, the minimum recommended
land pattern can be found in Application Note 826,
Recommended Minimum Pad Patterns With Outline
Drawing Access for Vishay Siliconix MOSFETs. Click
on the PowerPAK 1212-8 dual in the index of this document.
The gap between the two drain pads is 10 mils. This
matches the spacing of the two drain pads on the PowerPAK 1212-8 dual package.
This land pattern can be extended to the left, right, and
top of the drawn pattern. This extension will serve to
increase the heat dissipation by decreasing the thermal resistance from the foot of the PowerPAK to the
PC board and therefore to the ambient. Note that
increasing the drain land area beyond a certain point
will yield little decrease in foot-to-board and foot-toambient thermal resistance. Under specific conditions
of board configuration, copper weight, and layer stack,
experiments have found that adding copper beyond an
area of about 0.3 to 0.5 in2 of will yield little improvement in thermal performance.
ture profile used, and the temperatures and time
duration, are shown in Figures 2 and 3. For the lead
(Pb)-free solder profile, see http://www.vishay.com/
doc?73257.
REFLOW SOLDERING
Vishay Siliconix surface-mount packages meet solder
reflow reliability requirements. Devices are subjected
to solder reflow as a preconditioning test and are then
reliability-tested using temperature cycle, bias humidity, HAST, or pressure pot. The solder reflow tempera-
Ramp-Up Rate
+ 6 °C /Second Maximum
Temperature at 155 ± 15 °C
120 Seconds Maximum
Temperature Above 180 °C
70 - 180 Seconds
Maximum Temperature
240 + 5/- 0 °C
Time at Maximum Temperature
20 - 40 Seconds
Ramp-Down Rate
+ 6 °C/Second Maximum
Figure 2. Solder Reflow Temperature Profile
10 s (max)
210 - 220 °C
3 ° C/s (max)
4 ° C/s (max)
183 °C
140 - 170 °C
50 s (max)
3° C/s (max)
60 s (min)
Pre-Heating Zone
Reflow Zone
Maximum peak temperature at 240 °C is allowed.
Figure 3. Solder Reflow Temperatures and Time Durations
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Document Number 71681
03-Mar-06
AN822
Vishay Siliconix
TABLE 1: EQIVALENT STEADY STATE PERFORMANCE
Package
SO-8
TSSOP-8
TSOP-8
PPAK 1212
PPAK SO-8
Configuration
Single
Dual
Single
Dual
Single
Dual
Single
Dual
Single
Dual
Thermal Resiatance RthJC(C/W)
20
40
52
83
40
90
2.4
5.5
1.8
5.5
PowerPAK 1212
Standard SO-8
49.8 °C
2.4 °C/W
Standard TSSOP-8
85 °C
20 °C/W
TSOP-6
149 °C
52 °C/W
125 °C
40 °C/W
PC Board at 45 °C
Figure 4. Temperature of Devices on a PC Board
THERMAL PERFORMANCE
Introduction
Spreading Copper
A basic measure of a device’s thermal performance is
the junction-to-case thermal resistance, Rθjc, or the
junction to- foot thermal resistance, Rθjf. This parameter
is measured for the device mounted to an infinite heat
sink and is therefore a characterization of the device
only, in other words, independent of the properties of the
object to which the device is mounted. Table 1 shows a
comparison of the PowerPAK 1212-8, PowerPAK SO-8,
standard TSSOP-8 and SO-8 equivalent steady state
performance.
By minimizing the junction-to-foot thermal resistance, the
MOSFET die temperature is very close to the temperature of the PC board. Consider four devices mounted on
a PC board with a board temperature of 45 °C (Figure 4).
Suppose each device is dissipating 2 W. Using the junction-to-foot thermal resistance characteristics of the
PowerPAK 1212-8 and the other SMT packages, die
temperatures are determined to be 49.8 °C for the PowerPAK 1212-8, 85 °C for the standard SO-8, 149 °C for
standard TSSOP-8, and 125 °C for TSOP-6. This is a
4.8 °C rise above the board temperature for the PowerPAK 1212-8, and over 40 °C for other SMT packages. A
4.8 °C rise has minimal effect on rDS(ON) whereas a rise
of over 40 °C will cause an increase in rDS(ON) as high
as 20 %.
Designers add additional copper, spreading copper, to
the drain pad to aid in conducting heat from a device. It
is helpful to have some information about the thermal
performance for a given area of spreading copper.
Figure 5 and Figure 6 show the thermal resistance of a
PowerPAK 1212-8 single and dual devices mounted on
a 2-in. x 2-in., four-layer FR-4 PC boards. The two internal layers and the backside layer are solid copper. The
internal layers were chosen as solid copper to model the
large power and ground planes common in many applications. The top layer was cut back to a smaller area and
at each step junction-to-ambient thermal resistance
measurements were taken. The results indicate that an
area above 0.2 to 0.3 square inches of spreading copper
gives no additional thermal performance improvement.
A subsequent experiment was run where the copper on
the back-side was reduced, first to 50 % in stripes to
mimic circuit traces, and then totally removed. No significant effect was observed.
Document Number 71681
03-Mar-06
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3
AN822
Vishay Siliconix
130
105
Spreading Copper (sq. in.)
Spreading Copper (sq. in.)
120
95
110
100
RthJ A (°C/W)
RthJA (°C/W)
85
75
65
90
80
50 %
100 %
70
100 %
55
0%
60
50 %
0%
50
45
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
Figure 5. Spreading Copper - Si7401DN
Figure 6. Spreading Copper - Junction-to-Ambient Performance
CONCLUSIONS
As a derivative of the PowerPAK SO-8, the PowerPAK
1212-8 uses the same packaging technology and has
been shown to have the same level of thermal performance while having a footprint that is more than 40 %
smaller than the standard TSSOP-8.
Recommended PowerPAK 1212-8 land patterns are
provided to aid in PC board layout for designs using this
new package.
The PowerPAK 1212-8 combines small size with attractive thermal characteristics. By minimizing the thermal
rise above the board temperature, PowerPAK simplifies
thermal design considerations, allows the device to run
cooler, keeps rDS(ON) low, and permits the device to
handle more current than a same- or larger-size MOSFET die in the standard TSSOP-8 or SO-8 packages.
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4
Document Number 71681
03-Mar-06
Application Note 826
Vishay Siliconix
RECOMMENDED MINIMUM PADS FOR PowerPAK® 1212-8 Dual
0.152
(3.860)
0.152
(3.860)
0.039
0.039
(0.990)
(0.990)
0.068
0.068
(1.725)
(1.725)
0.010
(0.255)
0.016
(0.405)
0.016
(0.405)
0.094
(2.390)
0.094
(2.390)
0.010
(0.225)
(2.235)
0.088
0.039
(0.990)
0.039
(0.990)
0.026
(0.660)
0.026
(0.660)
0.030
(0.760)
0.025
(0.635)
0.025
0.030
(0.635)
(0.760)
Recommended Minimum PADs for PowerPAK 1212-8 Dual
Dimensions in Inches/(mm)
Recommended Minimum Pads
Dimensions in Inches/(mm)
Return to Index
APPLICATION NOTE
Return to Index
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Document Number: 72598
Revision: 14-Apr-08
Legal Disclaimer Notice
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 11-Mar-11
www.vishay.com
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