PTF
Vishay Dale
Metal Film Resistors, Precision, Ultra-High Stability
FEATURES
•
Extremely low temperature coefficient of
resistance
•
Very low noise and voltage coefficient
•
Very good high frequency characteristics
•
Can replace wirewound bobbins
•
Proprietary epoxy coating provides
superior moisture protection
•
Lead (Pb)-free version is RoHS compliant
Pb-free
Available
e3
RoHS*
COMPLIANT
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL HISTORICAL POWER RATING LIMITING ELEMENT
P
85 °C
VOLTAGE MAX.
MODEL
MODEL
W
V≅
PTF51
PTF-51
0.05
200
PTF56
PTF-56
0.125
300
PTF65
PTF-65
0.25
500
Note:
•
Marking: Print-marked-model, Value, Tolerance, TC, Date code
TEMPERATURE
COEFFICIENT
ppm/°C
5, 10, 15
5, 10, 15
5, 10, 15
TOLERANCE
%
0.02, 0.05, 0.1, 0.25, 0.5, 1
0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1
0.05, 0.1, 0.25, 0.5, 1
RESISTANCE
RANGE
Ω
15R to 100K
15R to 500K
15R to 1M0
TEMPERATURE COEFFICIENT CODES
GLOBAL TC CODE
Z
Y
X
HISTORICAL TC CODE
T-16
T-13
T-10
TEMPERATURE COEFFICIENT
5 ppm/°C
10 ppm/°C
15 ppm/°C
TECHNICAL SPECIFICATIONS
PARAMETER
Rated Dissipation at 85 °C
Limiting Element Voltage
Insulation Voltage (1 Min)
Thermal Resistance
Terminal Strength, Axial
Insulation Resistance
Category Temperature Range
Failure Rate
Weight (Max.)
UNIT
W
V≅
V
eff
K/W
N
Ω
°C
10
-9
/h
g
PTF51
0.05
200
> 500
< 1300
> 150
≥
10
11
- 55 to + 150
<1
0.11
PTF56
0.125
300
> 500
< 520
> 50
≥
10
11
- 55 to + 150
<1
0.35
PTF65
0.25
500
> 500
260
> 50
≥
10
11
- 55 to + 150
<1
0.75
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: PTF5620K500BYRE (preferred part numbering format)
P
GLOBAL
MODEL
PTF51
PTF56
PTF65
T
F
5
6
2
0
K
5
0
0
B
Y
R
E
SPECIAL
Blank = Standard
(Dash
Number)
(up to 3 digits)
From
1 - 999
as applicable
EK
= Lead (Pb)-free, Bulk
EA
= Lead (Pb)-free, T/R (Full)
EB
= Lead (Pb)-free,
T/R (1000 pieces)
BF
= Tin/Lead, Bulk
RE
= Tin/Lead, T/R (Full)
R6
= Tin/Lead, T/R (1000 pieces)
Historical Part Number example: PTF-5620K5BT-13R36 (will continue to be accepted)
RESISTANCE
VALUE
R
= Decimal
K
= Thousand
M
= Million
15R000
= 15
Ω
500K00=
500 kΩ
1M0000=
1.0 MΩ
TOLERANCE
CODE
T
=
±
0.01
%
(1)
Q
=
±
0.02
%
(1)
A
=
±
0.05
%
B
=
±
0.1
%
C
=
±
0.25
%
D
=
±
0.5
%
F
=
±
1
%
TEMP.
COEFFICIENT
Z
= 5 ppm
Y
= 10 ppm
X
= 15 ppm
0
= Special
PACKAGING
PTF-56
HISTORICAL
MODEL
20K5
RESISTANCE
VALUE
B
TOLERANCE
CODE
T-13
TEMP.
COEFFICIENT
R36
PACKAGING
Note:
(1)
Historical tolerance codes were BB for 0.01 % and BC for 0.02 %
* Pb containing terminations are not RoHS compliant, exemptions may apply
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For technical questions, contact: ff2aresistors@vishay.com
Document Number: 31019
Revision: 05-May-08
PTF
Metal Film Resistors, Precision, Ultra-High Stability
Vishay Dale
DIMENSIONS
1.50 ± 0.125
(1)
[38.10 ± 3.18]
L
D
GLOBAL
MODEL
PTF51
DIMENSIONS
in inches [millimeters]
L
D
0.150 ± 0.020 0.070 ± 0.010
[3.81 ± 0.51]
[1.78 ± 0.25]
0.250 ± 0.031 0.091 ± 0.009
[6.35 ± 0.79]
[2.31 ± 0.23]
0.375 ± 0.062 0.145 ± 0.016
[9.53 ± 1.57]
[3.68 ± 0.41]
L
1 max.
0.200
[5.08]
0.300
[7.62]
0.475
[12.07]
d
0.016
[0.41]
0.025
[0.64]
0.025
[0.64]
Note:
(1)
1.08 ± 0.125 [27.43 ± 3.18] if tape and reel
L
1 max.
d
PTF56
PTF65
PERFORMANCE
TEST
Life
Thermal Shock
Short Time Overload
Low Temperature Operation
Moisture
Resistance to Soldering Heat
Damp Heat IEC 60068-2-3
Dielectric Withstanding Voltage
RATED POWER IN
%
120
100
80
60
40
20
0
- 55
CONDITIONS OF TEST
MIL-PRF-55182 Paragraph 4.8.18
1000 h rated power at + 85 °C
MIL-STD-202, Method 107
- 55 °C to + 85 °C
MIL-R-10509, Paragraph 4.7.6
MIL-PRF-55182, Methods 4.8.10
MIL-PRF-55182, Paragraph 4.8.15
MIL-STD-202, Methods 210
56 days at 40 °C and 92 % RH
MIL-STD-202, Methods 301 and 105
TEST RESULTS
≤
± 0.04 %
≤
± 0.02 %
≤
± 0.01 %
≤
± 0.02 %
≤
± 0.08 %
≤
± 0.02 %
≤
± 0.08 %
≤
± 0.01 %
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 of
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.
PTF resistors have a very unifom resistance temp.
characteristic when measured over the operating range of
- 20 °C to + 85 °C. The standard temperature coefficients
available are
X = ± 15 ppm/°C, Y = ± 10 ppm/°C and Z = ± 5 ppm/°C.
- 25
0
25
50
75
100
85
125
150
175
200
DERATING
AMBIENT TEMPERATURE IN °C
MATERIAL SPECIFICATIONS
Element:
Encapsulation:
Core:
Termination:
Precision deposited nickel chrome
alloy with controlled annealing
Specially formulated epoxy
compounds. Coated construction
Fire-cleanded high purity ceramic
Standard lead material is
solder-coated copper. Solderable and
weldable per MIL-STD-1276, Type C.
Some applications of the PTF require operation beyond the
specifications of - 20 °C to + 85 °C. The change in temperature
coeffecient 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 - 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
three temperature coefficient codes.
ppm/?
C
ADDITIO
N
TO BASE TC I
N
THE
EXPA
N
DED PORTIO
N
OF THE
TEMPERATURE RA
N
GE
4
3
2
1
- 20 °C TO +
85
°C
BASE TC LIMIT
0
- 50 - 40 - 30 - 20
EXPANDED
OPERATING RANGE
- 55 °C TO - 20 °C
X, Y
or Z
90 100 110 120 130 140 150
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.
Document Number: 31019
Revision: 05-May-08
For technical questions, contact: ff2aresistors@vishay.com
www.vishay.com
87
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
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 herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
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.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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