PSF
Vishay Dale
Metal Film Resistors, High Precision,
High Stability, Surface Mount
FEATURES
•
Extremely low temperature coefficient of
resistance
•
Molded encapsulation
•
Wraparound compliant terminations eliminate
the risk of solder fillet cracking
•
Solderable terminations
•
Excellent stability at different environmental
conditions
•
For axial-leaded product, see Vishay Dale’s PTF
datasheet
•
Compliant to RoHS directive 2002/95/EC
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
PSF2012
PSF4527
SIZE
INCH
2012
4527
POWER RATING
P
85 °C
W
0.125
0.25
MAXIMUM
WORKING
VOLTAGE
(1)
V
DC
200
300
TEMPERATURE
COEFFICIENT
± ppm/°C
5, 10, 15, 25
5, 10, 15, 25
TOLERANCE
±%
0.01, 0.02, 0.05,
0.1, 0.25, 0.5, 1
0.01, 0.02, 0.05,
0.1, 0.25, 0.5, 1
RESISTANCE
RANGE
ENCAPSULATION
Ω
15 to 100K
15 to 500K
Epoxy
Thermoplastic
Notes
• Marking: Print-marked-model, value, tolerance, TC, date code.
• DSCC has created a drawing to support the need for a precision 2012-sized product. Vishay Dale is listed as a resource on this drawing as
follows:
DSCC DRAWING
NUMBER
02001
(1)
VISHAY DALE
MODEL
PSF2012..1
POWER RATING
P
85 °C
W
0.125
RESISTANCE
RANGE
Ω
15 to 100 K
TOLERANCE
±%
0.01, 0.02, 0.05,
0.1, 0.25, 0.5, 1
TEMPERATURE
COEFFICIENT
± ppm/°C
5, 10
MAX. WORKING
VOLTAGE
(1)
V
DC
200
This drawing can be reviewed at:
www.dscc.dla.mil/Programs/MilSpec/listDwgs.asp?DocType=DSCCdwg.
Continuous working voltage shall be
P
x
R
or maximum working voltage, whichever is less.
TECHNICAL SPECIFICATIONS
PARAMETER
Rated dissipation at 85 °C
Limiting element voltage
Insulation voltage (1 min)
Thermal resistance
Insulation resistance
Category temperature range
Failure rate
Weight/1000 pieces (typical)
UNIT
W
V≅
V
eff
K/W
Ω
°C
10
-9
/h
g
PSF2012
0.125
200
> 500
< 1300
≥
- 55 to + 150
<1
10
11
90
760
< 520
PSF4527
0.25
300
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: PSF201220K50BYTA (preferred part number format)
P
S
F
2
0
1
2
2
0
K
5
0
B
Y
T
A
GLOBAL MODEL
PSF2012
PSF4527
RESISTANCE VALUE
R=
Ω
K = kΩ
15R00
= 15
Ω
1K000
= 1 kΩ
500K0
= 500 kΩ
TOLERANCE CODE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
=±1%
TEMP. COEFFICIENT
Z
= ± 5 ppm/°C
Y
= ± 10 ppm/°C
X
= ± 15 ppm/°C
E
= ± 25 ppm/°C
0
= Special
PACKAGING
EK
= Lead (Pb)-free, bulk
EA
= Lead (Pb)-free, T/R
BA
= Tin/lead, bulk
TA
= Tin/lead, T/R (full)
SPECIAL
Blank = Standard
(Dash number)
(Up to 2 digits)
From
1 to 99
as
applicable
* Pb containing terminations are not RoHS compliant, exemptions may apply
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For technical questions, contact:
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Document Number: 30162
Revision: 14-Apr-10
PSF
Metal Film Resistors, High Precision,
High Stability, Surface Mount
DIMENSIONS
in inches (millimeters)
W
Vishay Dale
H
l
W
1
b
T
L
a
MODEL
PSF2012
PSF4527
L
0.200 ± 0.020
(5.08 ± 0.508)
0.455 ± 0.020
(11.56 ± 0.508)
H
0.096 ± 0.015
(2.44 ± 0.381)
0.167 ± 0.010
(4.24 ± 0.254)
T
0.040 ± 0.010
(1.02 ± 0.254)
0.100 ± 0.010
(2.54 ± 0.254)
W
0.125 ± 0.005
(3.18 ± 0.127)
0.275 ± 0.005
(6.98 ± 0.127)
W
1
0.050 ± 0.005
(1.27 ± 0.127)
0.215 ± 0.005
(5.46 ± 0.127)
SOLDER PAD DIMENSIONS
in inches (millimeters)
MODEL
PSF2012
PSF4527
a
0.085 (2.16)
0.155 (3.94)
b
0.070 (1.78)
0.230 (5.94)
l
0.080 (2.03)
0.205 (5.21)
THERMAL RESISTANCE
HEAT RISE IN °C (ABOVE AMBIENT)
200
DERATING
RATED POWER IN
%
120
100
80
60
40
20
150
PSF4527
100
PSF2012
50
0
0
0.5
1.0
1.5
2.0
POWER IN W
0
- 55
- 25
0
25
50
75 100
85
125
150
175
200
AMBIENT TEMPERATURE IN °C
MATERIAL SPECIFICATIONS
Element
Encapsulation
Core
Termination
Precision deposited nickel chrome alloy with controlled annealing
Molded epoxy on the 2012 and molded thermoplastic on the 4527
Fire-cleaned high purity ceramic
Standard leadframe material is solder-coated copper on the 2012 and solder-coated bronze on the 4527
PACKAGING
REEL
MODEL
TAPE WIDTH
12 mm/embossed plastic
24 mm/embossed plastic
DIAMETER
330 mm/13"
330 mm/13"
PIECES/REEL
2000
1200
PACKAGING CODE
LEAD (Pb)-FREE
EA
EA
LEAD (Pb)-BEARING
TA
TA
PSF2012
PSF4527
Note
• Embossed carrier tape per EIA-481.
Document Number: 30162
Revision: 14-Apr-10
For technical questions, contact:
ff2aresistors@vishay.com
www.vishay.com
321
PSF
Vishay Dale
Metal Film Resistors, High Precision,
High Stability, Surface Mount
TEMPERATURE COEFFICIENT OF RESISTANCE
Temperature coefficient (TC) of resistance is normally stated as the maximum amount of resistance change from the original + 25 °C value
as the ambient temperature increases or decreases. This is most commonly expressed in parts per million per degree centigrade (ppm/°C).
The resistance curve over the operating temperature range is usually a non-linear curve within predictable maximum limits. PSF resistors
have a very uniform resistance temperature characteristic when measured over the operating range of - 20 °C to + 85 °C. The standard
temperature coefficients available are
E = ± 25 ppm/°C, X = ± 15 ppm/°C, Y = ± 10 ppm/°C, and Z = ± 5 ppm/°C.
Some applications of the PSF require operation beyond the specifications of - 20 °C to + 85 °C. The change in temperature coefficient of
resistance is very small (less than ± 0.05 ppm/°C) over the expanded temperature range of - 55 °C to + 150 °C. Therefore, when operating
outside the range of - 20 °C to + 85 °C, the designer can plan for a worst case addition of ± 0.05 ppm/°C for each degree centigrade beyond
either - 20 °C or + 85 °C as indicated in the graph. This applies to all four temperature coefficient codes.
ppm/°C
ADDITION TO BASE TC IN THE
EXPANDED PORTION OF THE
TEMPERATURE RANGE
4
3
2
1
- 20 °C to +
85
°C
BASE TC LIMIT
0
- 50
- 40
- 30
- 20
90
100
110
120
130
140
150
EXPANDED
OPERATING RANGE
- 55 °C to - 20 °C
E, X, Y, OR Z
EXPANDED
OPERATING RANGE
+
85
°C to + 150 °C
Example:
Assume the operating characteristics demand a temperature range from - 55 °C to + 125 °C. This requires a ± 35 °C
Δ
below - 20 °C and a
± 40 °C
Δ
above + 85 °C. The extreme
Δ
being ± 40 °C means that the worst case addition to the specified TC limit of ± 0.05 ppm/°C times
± 40 °C or ± 2 ppm/°C. Therefore, a Z which is characterized by a base TC limit of ± 5 ppm/°C over the temperature range of - 20 °C
to + 85 °C will exhibit a maximum temperature coefficient of ± 7 ppm/°C over the expanded portion of the temperature range of - 55 °C
to 125 °C.
PERFORMANCE
TEST
Life
Short time overload
Thermal shock
Low temperature operation
Resistance to bonding exposure
Moisture resistance
Solder mounting integrity
Dielectric withstanding voltage
Solderability
CONDITIONS OF TEST
MIL-STD-202, method 108, 1000 h rated power at + 85 °C
MIL-PRF-55342, paragraph 4.8.6
MIL-STD-202, method 107, - 65 °C to + 150 °C
MIL-PRF-55342, paragraph 4.8.5
MIL-STD-202, method 210
MIL-PRF-55342, paragraph 4.8.9
MIL-PRF-55342, paragraph 4.8.13, 3 kg for 30 s
MIL-STD-202, methods 301 and 105
MIL-STD-202, method 208
TEST RESULTS
(TYPICAL TEST LOTS)
≤
± 0.04 %
≤
± 0.01 %
≤
± 0.02 %
≤
± 0.02 %
≤
± 0.02 %
≤
± 0.08 %
No evidence of mechanical damage
≤
± 0.01 %
95 % coverage
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For technical questions, contact:
ff2aresistors@vishay.com
Document Number: 30162
Revision: 14-Apr-10
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
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1
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