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PTF
Vishay Dale
Document Number 31019
Revision 06-Feb-03
For Technical Questions, contact ff2aresistors@vishay.com
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
MODEL POWER RATING LIMITING ELEMENT TEMPERATURE TOLERANCE RESISTANCE
P85°CVOLTAGE MAX. COEFFICIENT RANGE
WV쓖 ppm/°C% Ω
PTF-51 0.05 200 5, 10, 15 0.02, 0.05, 0.1, 0.25, 0.5, 1 15R - 100K
PTF-56 0.125 300 5, 10, 15 0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1 15R - 500K
PTF-65 0.25 500 5, 10, 15 0.05, 0.1, 0.25, 0.5. 1 15R - 1M0
STANDARD ELECTRICAL SPECIFICATIONS
• Marking: Print-marked-model, Value, Tolerance, TC, Date code
PTF-56 20K5 B T-13 R36
MODEL RESISTANCE TOLERANCE TEMPERATURE COEFFICIENT PACKAGING
PTF 51 VALUE F = ± 1% ppm/°C See appropriate
PTF 56 ΩD = ± 0.5% T-10 = ± 15 catalog or web page
PTF 65 62R2 = 62.2 C = ± 0.25% T-13 = ± 10 R36 = Reel
1M00 = 1M B = ± 0.1% T-16 = ± 5 B14 = Bulk
A = ± 0.05%
BC = ±0.02%
BB = ± 0.01%
ORDERING INFORMATION
PARAMETER UNIT PTF-51 PTF-56 PTF-65
Rated Dissipation at 85°C W 0.05 0.125 0.25
Limiting Element Voltage V쓖200 300 500
Insulation Voltage (1 min) Veff > 500 > 500 > 500
Thermal Resistance K/W < 1300 < 520 260
Terminal Strength, axial N > 150 > 50 > 50
Insulation Resistance Ω≥1011 ≥1011 ≥ 1011
Category Temperature Range °C - 55/+ 150 - 55/+ 150 - 55/+ 150
Failure Rate 10-9/h < 1 < 1 < 1
Weight (max) g 0.11 0.35 0.75
TECHNICAL SPECIFICATIONS
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33
PTF
Vishay Dale
Document Number 31019
Revision 06-Feb-03 For Technical Questions, contact ff2aresistors@vishay.com
DIMENSIONS MODEL DIMENSIONS in inches [millimeters]
LDL
1 max d
PTF-51 0.150 ± 0.020 0.070 ± 0.010 0.200 0.016
[3.81 ± 0.51] [1.78 ± 0.25] [5.08] [0.41]
PTF-56 0.250 ± 0.031 0.091 ± 0.009 0.300 0.025
[6.35 ± 0.79] [2.31 ± 0.23] [7.62] [0.64]
PTF-65 0.375 ± 0.062 0.145 ± 0.016 0.475 0.025
[9.53 ± 1.57] [3.68 ± 0.41] [12.07] [0.64]
TEST CONDITIONS OF TEST TEST RESULTS
Endurance MIL-PRF-55182 Para. 4.7.17 ≤ ± 0.04%
1000 hours rated power at + 85˚C
Thermal Shock MIL-STD-202, Method 107 ≤ ± 0.02%
-55˚C to + 85˚C
Short Time Overload MIL-R-10509, Paragraph 4.6.6 ≤ ± 0.01%
Low Temperature Operation MIL-PRF-55182, Methods 4.7.9 ≤ ± 0.02%
Moisture MIL-STD-202 Method 106 ≤ ± 0.08%
Resistance to Soldering Heat MIL-STD-202, Methods 210 ≤ ± 0.02%
Damp Heat 56 days at 40˚C and 92% RH ≤ ± 0.08%
IEC 60068-2.3
Dielectric Withstanding Voltage MIL-STD-202, Methods 301 & 105 ≤ ± 0.01%
PERFORMANCE
MATERIAL SPECIFICATIONS
Element: Precision deposited nickel chrome alloy
with controlled annealing
Encapsulation: Specially formulated epoxy compounds.
Coated construction
Core: Fire-cleaned high purity ceramic
Termination: Standard lead material is solder-coated
copper. Solderable and weldable per
MIL-STD-1276, Type C.
Metal Film Resistors, Precision, Ultra-high Stability
L1
Max.
LD
1.50 ± 0.125
[38.10 ± 3.18]
d
-55 -25 0 25 50 75 85 100 125 150 175 200
AMBIENT TEMPERATURE IN ˚C
DERATING
RATED POWER IN %
* 1.08 ± 0.125 [27.43 ± 3.18] IF TAPE AND REEL
0
20
40
60
80
100
120
