QFX
www.vishay.com
Vishay Electro-Films
Thin Film, Top-Contact Megohm Resistor
FEATURES
• Wire bondable
• Chip size: 0.050 inches square
• Case: 0505
• Resistance range: 500 k to 10 M
• Quartz substrate: < 0.1 pF shunt capacitance
Product may not be to scale
• Resistor material: Tantalum nitride, self-passivating
The QFX series, tantulum nitride on quartz resistor chips
combine high resistance with low shunt capacitance. These
offer one of the best combinations of small size, frequency
response and high value available.
The QFXs are manufactured using Vishay Electro-Films (EFI)
sophisticated thin film equipment and manufacturing
technology. The QFXs are 100 % electrically tested and
visually inspected to MIL-STD-883, method 2032 class H
or K.
APPLICATIONS
The QFX series resistor chips are designed for circuits
requiring high values with lower shunt capacitance for
higher frequency of operation.
TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES, AND TOLERANCES
PARAMETER
Total Resistance Range
Standard Tolerances
TCR
VALUE
500K to 10M
± 0.1, ± 0.5
± 50, ± 100, ± 250, ± 350
UNIT
%
ppm/°C
Tightest Standard Tolerance Available
0.1 %
± 50 ppm/°C
± 100 ppm/°C
± 250 ppm/°C
± 350 ppm/°C
0.5 %
500 kΩ
1 MΩ 2.0 MΩ 4.2 MΩ
10 MΩ
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Noise, MIL-STD-202, Method 308
Moisture Resistance, MIL-STD-202
Method 106
Stability, 1000 h, + 125 °C, 10 mW
Operating Temperature Range
Thermal Shock, MIL-STD-202,
Method 107, Test Condition F
High Temperature Exposure, + 150 °C, 100 h
Dielectric Voltage Breakdown
Insulation Resistance
Operating Voltage
DC Power Rating at + 70 °C (Derated to zero at + 175 °C)
5 x Rated Power Short-Time Overload, + 25 °C, 5 s
VALUE
- 12 typ.
± 0.5 max.
R/R
± 0.5 max.
R/R
- 55 to + 125
± 0.25 max.
R/R
± 0.5 max.
R/R
400
10
12
min.
400 max.
0.020
± 0.25 max.
R/R
UNIT
dB
%
%
°C
%
%
V
V
W
%
Revision: 17-Aug-11
1
For technical questions, contact:
efi@vishay.com
Document Number: 61031
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
QFX
www.vishay.com
DIMENSIONS
in inches
0.050
Vishay Electro-Films
0.045
0.050
0.005
0.005
SCHEMATIC
MECHANICAL SPECIFICATIONS
PARAMETER
Chip Size
Chip Thickness
Chip Substrate Material
Resistor Material
Bonding Pad size
Number of Pads
Pad Material
Backing
VALUE
0.050" x 0.050" ± 0.003" (1.25 mm x 1.25 mm ± 0.75 mm)
0.010" ± 0.002" (0.254 mm ± 0.05 mm)
Quartz
Tantalum nitride, self-passivating
0.005" x 0.005" (0.127 mm x 0.127 mm)
2
10 kÅ minimum aluminum (Au optional)
None, lapped quartz
GLOBAL PART NUMBER INFORMATION
Global Part Number: QFX25003KR4GGKWS
Global Part Number Description: QFX 2.5M 10 % 0/- 250 ppm/°C 40 Au Au K WS
Q
F
X
2
5
0
TOL.
CODE
(%)
0
3
K
R
4
G
G
K
W
S
MODEL
QFX
High value
TaN on
Quartz
RESISTANCE
First 4
digits are
significant
figures of
resistance
RESISTANCE
MULTILPLIER
CODE
2
= 100
3
= 1000
4
= 10 000
TCR
(ppm/°C)
SIZE
3
= 30 x 30
4
= 40 x 40
5
= 55 x 55
TERMINATION
G
= Au
A
= Al
BACK
METAL
G
= Au
N
= None
VISUAL
CLASS
H
=
Class H
K
=
Class K
PACKAGING
CODE
WS
=
Waffle pack
100 min.,
1 mult
E
= ± 25
B
= 0.1
C
= ± 50
C
= 0.25
D
= 0.5
K
= ± 100
F
= 1.0
M
= ± 250
G
= 2.0
W
= ± 350
J
= 5.0
R
= 0/- 250
K
= 10.0
P
= 0/- 350
I
= 0/- 200
Revision: 17-Aug-11
2
For technical questions, contact:
efi@vishay.com
Document Number: 61031
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
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. 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.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
Revision: 02-Oct-12
1
Document Number: 91000
