PTF
Vishay Dale
Metal Film Resistors, Precision, Ultra-high Stability
FEATURES
Extremely low temperature coefficient of resistance
Pb-free
Very low noise and voltage coefficient
Available
Very good high frequency characteristics
Can replace wirewound bobbins
e3
Proprietary epoxy coating provides superior
moisture protection
RoHS*
• Lead (Pb)-Free Version is RoHS Compliant
COMPLIANT
•
•
•
•
•
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
PTF51
PTF56
PTF65
HISTORICAL POWER RATING
MODEL
P
85
°
C
W
PTF-51
0.05
PTF-56
0.125
PTF-65
0.25
LIMITING ELEMENT
VOLTAGE MAX.
V
200
300
500
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 - 100K
15R - 500K
15R - 1M0
• Marking: Print-marked-model, Value, Tolerance, TC, Date code
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/+ 150
<1
0.11
PTF56
0.125
300
> 500
< 520
> 50
≥10
11
- 55/+ 150
<1
0.35
PTF65
0.25
500
> 500
260
> 50
≥
10
11
- 55/+ 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
RESISTANCE
VALUE
R
= Decimal
K
= Thousand
M
= Million
G
= Billion
15R000
= 15Ω
500K00
= 500KΩ
1M0000
= 1.0MΩ
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
= 5ppm
Y
= 10ppm
X
= 15ppm
0
= Special
PACKAGING
EK
= Lead Free, Bulk
EA
= Lead Free, T/R (Full)
EB
= Lead Free, T/R (1000pcs)
BF
= Tin/Lead, Bulk
RE
= Tin/Lead, T/R (Full)
R6
= Tin/Lead, T/R (1000pcs)
Historical Part Number example: PTF-5620K5BT-13R36 (will continue to be accepted)
PTF-56
HISTORICAL
MODEL
20K5
RESISTANCE
VALUE
B
TOLERANCE
CODE
T-13
TEMP.
COEFFICIENT
R36
PACKAGING
* Pb containing terminations are not RoHS compliant, exemptions may apply.
** Historical tolerance codes were BB for 0.01% and BC for 0.02%..
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74
For Technical Questions, contact ff2aresistors@vishay.com
Document Number 31019
Revision 05-Oct-05
PTF
Metal Film Resistors, Precision, Ultra-high Stability
DIMENSIONS
1.50
±
0.125
[38.10
±
3.18]
L
D
Vishay Dale
GLOBAL
MODEL
PTF51
PTF56
d
DIMENSIONS in inches
[millimeters]
L
0.150
±
0.020
[3.81
±
0.51]
0.250
±
0.031
[6.35
±
0.79]
0.375
±
0.062
[9.53
±
1.57]
D
0.070
±
0.010
[1.78
±
0.25]
0.091
±
0.009
[2.31
±
0.23]
0.145
±
0.016
[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]
L
1
Max.
* 1.08
±
0.125 [27.43
±
3.18] IF TAPE AND REEL
PTF65
PERFORMANCE
TEST
Endurance
Thermal Shock
Short Time Overload
Low Temperature Operation
Moisture
Resistance to Soldering Heat
Damp Heat
IEC 60068-2.3
Dielectric Withstanding Voltage
CONDITIONS OF TEST
MIL-PRF-55182 Para. 4.7.17
1000 hours rated power at + 85˚C
MIL-STD-202, Method 107
-55˚C to + 85˚C
MIL-R-10509, Paragraph 4.6.6
MIL-PRF-55182, Methods 4.7.9
MIL-STD-202 Method 106
MIL-STD-202, Methods 210
56 days at 40˚C and 92% RH
MIL-STD-202, Methods 301 & 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 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. PTF 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 X =
±
15ppm/˚C, Y =
±
10ppm/˚C
and Z =
±
5ppm/˚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
±
0.05ppm/˚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
±
0.05ppm/˚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
ADDITION TO BASE TC IN THE
EXPANDED PORTION OF THE
TEMPERATURE RANGE
RATED POWER IN %
120
100
80
60
40
20
0
-55
-25
0
25
50
75 85 100
125
150
175
200
DERATING
AMBIENT TEMPERATURE IN
˚C
4
MATERIAL SPECIFICATIONS
Element:
Precision deposited nickel chrome alloy
with controlled annealing
Specially formulated epoxy compounds.
Coated construction
Fire-cleaned high purity ceramic
3
2
1
0
- 50 - 40 - 30 - 20
EXPANDED
OPERATING RANGE
- 55˚C TO - 20˚C
X, Y
or Z
- 20˚C TO + 85˚C
BASE TC LIMIT
Encapsulation:
90 100 110 120 130 140 150
EXPANDED
OPERATING RANGE
- 85˚C TO + 150˚C
Core:
Termination:
Standard lead material is solder-coated
copper. Solderable and weldable per
MIL-STD-1276, Type C.
Example:
Assume the operating characteristics demand a
temperature range from -55˚C to + 125˚C. This requires a
±
35˚C
∆
below - 20˚C and a
±
40˚C
∆
above + 85˚C. The extreme
∆
being
±
40˚C means that the worst case addition to the specified TC limit of
±
0.05ppm/˚C times
±
40˚C or
±
2ppm/˚C. Therefore, a Z which is
characterized by a base TC limit of
±
5ppm/˚C over the temperature
range of - 20˚C to
±
85˚C will exhibit a maximum temperature coefficient
of
±
7ppm/˚C over the expanded portion of the temperature range of
- 55˚C to + 125˚C.
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75
Document Number 31019
Revision 05-Oct-05
For Technical Questions, contact ff2aresistors@vishay.com
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
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1
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