VFP-3, VFP-4
Vishay Foil Resistors
Bulk Metal® Foil Technology Power
and Current Sensing Resistors with TCR of 2 ppm/°C,
Tolerance to ± 0.01 % and power up to 10 W
FEATURES
Any value available within resistance range
The basic features of Vishay Bulk Metal® Foil resistors; tight
resistance tolerance, fast response time, low TCR, and
exceptional long-term stability, are available for power-circuit
applications. Typical applications are non-inductive design,
current sensing applications, deflection amplifiers, constant
current power supplies, forced balance electronic scales,
graphic display computers, character generation on CRTs,
and electron beam controls.
Our Application Engineering Department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
R
I
I
I1
E1
E2
I2
Temperature Coefficient of Resistance (TCR):
± 2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C Ref.) (see Tables 1 and 2)
Tolerance: to ± 0.01 % (see Tables 1 and 2)
Power Rating (heat-sinked): 10 W
Load Life Stability: ± 0.005 % at 25 °C,
2000 hours at Rated Power
Resistance Range: 0.05 to 80 k
Electrostatic Discharge (ESD) above 25 000 V
Non Inductive, Non Capacitive Design
Rise Time: 1 ns without Ringing
Current Noise: < - 40 dB
Thermal EMF: 0.05 µV/°C typical
Voltage Coefficient: < 0.1 ppm/V
Non Inductive: < 0.08 µH
Non Hot Spot Design
Terminal Finishes Available: Lead (Pb)-free
Tin/Lead Alloy
Any Value available within Resistance Range (e.g.
1K2345)
Prototype Samples available from 48 hours. For more
Information, please contact foil@vishaypg.com
For better Performances, please see VFP-3Z and VFP-4Z
Datasheets
V
TABLE 1 - VFP-31) SPECIFICATIONS
TABLE 2 - VFP-41), 2) SPECIFICATIONS
RESISTANCE
RANGE ()
MAXIMUM
TCR3)
RESISTANCE
RANGE ()
STANDARD
TOLERANCE
± 5 ppm/°C
10 to 500
± 0.01 %
± 5 ppm/°C
5 to < 10
± 0.02 %
± 6 ppm/°C
2 to < 5
± 0.05 %
± 8 ppm/°C
1 to < 2
± 0.1 %
STANDARD
TOLERANCE
TYPICAL
TCR3)
50 to 80K
± 0.01 %
25 to < 50
± 0.02 %
± 7 ppm/°C
10 to < 25
± 0.05 %
± 10 ppm/°C
5 to < 10
± 0.1 %
± 13 ppm/°C
2 to < 5
± 0.25 %
1 to < 2
± 0.5 %
0.5 to < 1
± 1.0 %
0.25 to < 0.5
± 2.0 %
0.1 to < 0.25
± 5.0 %
± 2 ppm/°C
± 20 ppm/°C
± 25 ppm/°C
± 50 ppm/°C
TYPICAL
TCR3)
MAXIMUM
TCR3)
± 10 ppm/°C
± 2 ppm/°C
0.5 to < 1
± 0.25 %
± 15 ppm/°C
0.25 to < 0.5
± 0.5 %
± 20 ppm/°C
0.1 to < 0.25
± 1.0 %
± 25 ppm/°C
0.05 to < 0.1
± 2.0 %
± 30 ppm/°C
Notes
Tighter tolerance available upon request
See page 3 in this data sheet for numbered footnotes.
1. Weight = 15 g Max
2. VFP-4 available up to 500 .
3. - 55 °C to + 125 °C, + 25 °C Ref.
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63014
Revision: 23-Mar-10
For any questions, contact: foil@vishaypg.com
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1
VFP-3, VFP-4
Vishay Foil Resistors
FIGURE 1 - STANDARD IMPRINTING AND DIMENSIONS in inches (millimeters)
VFP-3
+ 0.004
+ 0.1
VFP-4
+ 0.004
0.276 - 0.008 (7.01 - 0.2 )
1.181 ± 0.016 (30 ± 0.41)
0.197 (5.00)
0.118 (3.00)
1.181 ± 0.016 (30 ± 0.41)
0.787 ± 0.016
(19.99 ± 0.41)
VISHAY
VFP-4
(Value)
(Tol.)
(Date Code)
0.150 ± 0.004
(3.81 ± 0.1)
VISHAY
VFP-3
(Value)
(Tol.)
(Date Code)
0.394 ± 0.008
(10.01 ± 0.2)
Lead Dia.
0.025 (0.633)
Solder Coated
Copper
0.197 (5.00)
I1 E1 E2
0.600 (15.24)
0.118 (3.00)
0.150 ± 0.004
(3.81 ± 0.1)
0.394 ± 0.008
(10.01 ± 0.2)
Lead Dia.
0.025 (0.64)
Solder Coated
Copper
1.00 Min.
(25.4 Min.)
+ 0.1
0.276 - 0.008 (7.01 - 0.2 )
1.575 ± 0.016 (40.01 ± 0.41)
1.575 ± 0.016 (40.01 ± 0.41)
0.787 ± 0.016
(19.99 ± 0.41)
1.00 Min.
(25.4 Min.)
I2
0.200 [x3] (5.08)
TABLE 3 - SPECIFICATIONS
Stability
± 0.05 % maximum R under full rated power (3 W at + 25 °C)
Load Life at 2000 hours
Power Rating
10 W or 3 A1) on heat sink2)
At + 25 °C
3 W or 3 A1) in free air
Power rating based on R. Further derating not necessary.
Current Noise
< 0.010 µV (RMS)/V of applied voltage (- 40 dB)
High Frequency Operation
Rise Time
1.0 ns at 1 k
Inductance (L)3)
0.1 µH maximum; 0.08 µH typical
Capacitance (C)
1.0 pF maximum; 0.5 pF typical
Voltage Coefficient
< 0.1 ppm/V4)
Operating Temp. Range
- 55 °C to + 150 °C
Maximum Working Voltage5)
350 V
Thermal EMF6)
0.5 µV/°C typical (lead effect)
Percent of Rated Power
FIGURE 2 - POWER DERATING CURVE
+ 100
- 55 °C
FIGURE 3 - TRIMMING TO VALUES
(Conceptual Illustration)
Rated Power
Interloop Capacitance
Reduction in Series
+ 75
+ 50
Mutual Inductance
Reduction due
to Change in
Current Direction
+ 25
0
- 75 - 50 - 25
0 + 25 + 50 + 75 + 100 + 125 + 150 + 175
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Ambient Temperature (°C)
Note: Foil shown in black, etched spaces in white
www.foilresistors.com
2
For any questions, contact: foil@vishaypg.com
Document Number: 63014
Revision: 23-Mar-10
VFP-3, VFP-4
Vishay Foil Resistors
TABLE 4 - POWER RESISTOR ENVIRONMENTAL PERFORMANCE COMPARISON
METHOD
PARAGRAPH7)
MIL-PRF-39009
R LIMITS
VFP-3, VFP-4
MAXIMUM
TEST DATA10)
4.8.2
± 0.2 % + 0.01
± 0.03 %
TEST GROUP I
Conditioning
TEST GROUP II
Resistance Temperature Characteristic
4.8.4
(- 55 °C to + 125 °C)
< 1 : ± 100 ppm/°C;
See
1 to 19.6 : ± 50 ppm/°C;
tables 1 and 2
20 : ± 30 ppm/°C
Low Temp Storage
4.8.16
± 0.3 % + 0.01
± 0.01 %
4.8.5
± 0.2 % + 0.01
± 0.005 %
DWV
(750 V at atmosphere pressure)
104
> 104 M
Insulation Resistance
4.8.6
Low Temp Operation
4.8.7
± 0.3 % + 0.01
± 0.01 %
4.8.8
± 0.3 % + 0.01
± 0.01 %
Short time
Overload9)
M
Moisture Resistance
4.8.9
± 0.5 % + 0.01
± 0.05 %
Terminal Strength
4.8.10
± 0.2 % + 0.01
± 0.005 %
Shock - Specified Pulse
4.8.11
± 0.2 % + 0.01
± 0.01 %
Vibration - High Frequency
4.8.12
± 0.2 % + 0.01
± 0.005 %
4.8.13
± 1.0 % + 0.01
± 0.05 %
-
-
± 0.05 %
4.8.14
± 1.0 % + 0.01
± 0.03 %
TEST GROUP III
TEST GROUP IV
Life Test
10 W at + 25 °C for 2000 hours
60 % power at + 70 °C
for 2000 hours
TEST GROUP V
High Temp Exposure
(2000 hours at + 150 °C)
Notes
1. Whichever is lower.
2. Heat sink chassis
MIL-PRF-39009:
L
W
H
T
5. Not to exceed power rating of resistor.
dimensions
and
INCHES
6.00
4.00
2.00
0.04
requirements
per
MILLIMETERS
152.4
101.6
50.8
1.0
3. Inductance (L) due mainly to the leads.
4. The resolution limit of existing test equipment (within the
measurement capability of the equipment, or "essentially zero").
Document Number: 63014
Revision: 23-Mar-10
6. µV/°C relates to EMF due to lead temperature difference and
µV/watt due to power applied to the resistor.
7. Vishay test data as compared to MIL-PRF-39009 is shown for
illustration purposes, Vishay test conditions that deviate from the
MIL test method are noted within parentheses.
8. Maximum ambient temperature rating is + 150 °C.
9. Maximum overload rating is 15 W (5 x rated power in free air;
1.5 x rated power on heat sink), with applied voltage not to
exceed 750 V.
10. R’s are as shown plus 0.001 to allow for measurement errors
at low resistance values.
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
3
VFP-3, VFP-4
Vishay Foil Resistors
TABLE 5 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y073321K5000T9L (preferred part number format)
DENOTES PRECISION
VALUE
AER*
Y
R=
K = k
0 = Standard
9 = Lead (Pb)-free
1 - 999 = Custom
Y
0
7
3
3
2
1
K
5
0
0
0
T
9
PRODUCT CODE
RESISTANCE TOLERANCE
PACKAGING
0733 = VFP-3
0734 = VFP-4
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
G = ± 2.0 %
J = ± 5.0 %
L = Bulk Pack
L
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0733 21K5000 T 9 L:
TYPE: VFP-3
VALUE: 21.5 k
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: Lead (Pb)-free
PACKAGING: Bulk Pack
HISTORICAL PART NUMBER: VFP-3T 21K500 T B (will continue to be used)
VFP-3
T
21K500
MODEL
TERMINATION
OHMIC VALUE
VFP-3
VFP-4
T = Lead (Pb)-free
None = Tin/Lead alloy
21.5 k
T
RESISTANCE
TOLERANCE
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
G = ± 2.0 %
J = ± 5.0 %
B
PACKAGING
B = Bulk Pack
Note
* For non-standard requests, please contact Application Engineering.
www.foilresistors.com
4
For any questions, contact: foil@vishaypg.com
Document Number: 63014
Revision: 23-Mar-10
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Vishay Precision Group, Inc.
Disclaimer
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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