VPR221SZ (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Bulk Metal
®
Z-Foil Surface Mount Power
Resistor in TO-220 Configuration with TCR of ± 0.05 ppm/°C,
PCR of 4 ppm/W and Load Life Stability of ± 0.005 % (50 ppm)
FEATURES
Temperature coefficient of resistance (TCR):
INTRODUCTION
The Z-Foil technology provides a significant reduction of the
resistive component’s sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR).
Model VPR221SZ is a 4 lead kelvin connected surface
mount device which provides high rated power, excellent
load life stability, low temperature coefficient (TCR) and low
power coefficient (PCR) - all in one resistor. ± 0.05 ppm/°C
absolute TCR removes error due to temperature gradients.
By taking advantage of the overall stability and reliability of
Bulk Metal
®
Z-Foil resistors, designers can significantly
reduce circuit errors and greatly improve overall circuit
performances.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
Tolerance: to ± 0.01 %
Power coefficient “R due to self heating”: 4 ppm/W typical
Rated power: 8 W chassis mounted (MIL-PRF-39009)
Load life stability: to ± 0.005 % at 25 °C for 2000 h, at 1.5 W
Resistance range: 0.5
to 500
Foil resistors are not restricted to standard values; specific
“as requested” values can be supplied at no extra cost or
delivery (e.g. 100R2345 vs. 100R)
Electrostatic discharge (ESD) up to 25 000 V
Short time overload
0.001 % (10 ppm)
Non-inductive, non-capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
Thermal EMF: 0.05 µV/°C typical
Voltage coefficient < 0.1 ppm/V
Non-inductive: < 0.08 µH
Non hot spot design
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Terminal finish: lead (Pb)-free or tin/lead alloy
Compliant to RoHS directive 2002/95/EC
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
For better performances please contact us
FIGURE 1 - SCHEMATICS
R
I
I
I
1
E
1
V
E
2
I
2
TABLE 1 - TCR AND TOLERANCE
RESISTANCE
RANGE ()
0.5 to < 1
1 to < 10
10 to 500
Notes
(1)
TIGHTEST
RESISTANCE
TOLERANCE
± 0.05 %
± 0.02 %
± 0.01 %
TYPICAL TCR AND
MAX. SPREAD
(1)
± 0.2 ppm/°C ± 2.8 ppm/°C
FIGURE 2 - POWER DERATING CURVE
- 55 °C
100
Percent of Rated Power
75
± 0.2 ppm/°C ± 2.3 ppm/°C
± 0.2 ppm/°C ± 1.8 ppm/°C
50
25
MIL-range (- 55 °C to + 125 °C, + 25 °C ref.)
Contact applications engineering for other available values
0
- 75
- 50
- 25
0
25
50
75
100
125
150
•
Ambient Temperature (°C)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63127
Revision: 16-Aug-12
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
VPR221SZ (Z-Foil)
Vishay Foil Resistors
FIGURE 3 - TRIMMING TO VALUES
(conceptual illustration)
FIGURE 4 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
(for more details see table 1)
TCR Chord Slopes for Different Temperature Ranges
+ 500
Interloop
Capacitance
Reduction
in Series
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
+ 400
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 0.16 ppm/°C
- 55
- 25
0
+ 25
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
+ 60 + 75
+ 100 + 125
Note:
Foil shown in black, etched spaces in white
Ambient Temperature (°C)
FIGURE 5 - VPR221SZ FORMING
DIMENSIONS
in inches (millimeters)
0.365 (9.27) Ref.
0.015 ± 0.002
(0.38 ± 0.05)
0.150 ± 0.008
(3.81 ± 0.20)
0.050 ± 0.005
(1.27 ± 0.13)
Before Forming
0.078 ± 0.005
(1.98 ± 0.13)
FIGURE 6 - VPR221SZ DIMENSIONS
in inches (millimeters)
0.400 ± 0.010
(10.16 ± 0.25)
0.245 ± 0.010
(6.22 ± 0.25)
VFR
VPR221SZ
1R0 1 %
0101
0.150 ± 0.008
(3.81 ± 0.20)
0.115 ± 0.005
(2.92 ± 0.13)
0.141 ± 0.005 Dia.
(3.58 ± 0.13)
0.050 ± 0.005
(1.27 ± 0.13)
0.030 ± 0.002
(0.76 ± 0.05)
0.050 ± 0.005
(1.27 ± 0.13)
0.615 Max.
(15.62)
0.695 ± 0.010
(17.65 ± 0.25)
0.110 (2.79) Ref.
0.090 (2.286) Ref.
0.090 ± 0.010
(2.29 ± 0.25)
Heat Sink
Flush with Heat Sink
Within ± 0.002 (± 0.05)
0.200 ± 0.030
(5.08 ± 0.76)
0.540 ± 0.040
(13.72 ± 1.02)
I
1
E
1
E
2
I
2
0.100 ± 0.005
(2.54 ± 0.13)
0.015 ± 0.002
(0.38 ± 0.05)
0.078 ± 0.005
(1.98 ± 0.13)
After Forming
FIGURE 7 - LAND PATTERN DIMENSIONS
in inches (millimeters)
0.050 ± 0.010
(1.27 ± 0.25)
0.120 ± 0.010
(3.05 ± 0.25)
0.10 ± 0.005
(2.54 ± 0.12)
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For any questions, contact:
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Document Number: 63127
Revision: 16-Aug-12
VPR221SZ (Z-Foil)
Vishay Foil Resistors
TABLE 2 - SPECIFICATIONS
Power Rating at + 25 °C
Current Noise
High Frequency Operation
Rise Time
Inductance (L)
(3)
Capacitance (C)
Voltage Coefficient
(4)
Operating Temperature Range
Maximum Working Voltage
Thermal EMF
(5)
Weight
Notes
(1)
(2)
8 W or 3 A
(1)
on heat sink
(2)
1.5 W in free air
Further derating not necessary.
< 0.010 µV
RMS
/V of applied voltage (- 40 dB)
0.2 ns at 1 W
0.1 µH maximum: 0.03 µH typical
1.0 pF maximum: 0.5 pF typical
< 0.1 ppm/V
- 55 °C to + 150 °C
300 V, not to exceed power rating
0.15 µV/°C maximum (lead effect)
1.2 g maximum
Whichever is lower
Heat sink chassis dimensions are requirements per MIL-R-39009/1B:
DIMENSIONS
L
W
H
T
inches
6.00
4.00
2.00
0.04
mm
152.4
101.6
50.8
1.0
(3)
(4)
(5)
Inductance (L) mainly due to the leads
The resolution limit of existing test requirement (within the measurement capability of the equipment, “essentially zero”)
µV/°C relates to EMF due to lead temperature difference
TABLE 3 - PERFORMANCE SPECIFICATIONS
(1)
MIL-PRF 39009
TEST OR CONDITION
Low temperature storage 24 h at - 55 °C
Dielectric withstanding voltage 300 V
AC
at Atm
Dielectric withstanding voltage 200 V
AC
at Brm
Insulation resistance
Low temperature operation
Short time overload 5 x rated power for 5 s (in air)
Moisture resistance + 65 °C to - 10 °C, 90 RH to 98 RH, 10
days
Terminal strength
Load life 8 W at + 25 °C, 2000 h with heat sink
Load life 1.5 W at + 25 °C for 2000 h in free air
High temperature exposure + 150 °C
Note
(1)
MIL-PRF 39009
± 0.3 % + 0.01
± 0.2 % + 0.01
± 0.2 % + 0.01
> 10
4
M
± 0.3 % + 0.01
± 0.3 % + 0.01
± 0.5 % + 0.01
± 0.2 % + 0.01
± 1.0 % + 0.01
± 1.0 % + 0.01
± 1.0 % + 0.05
TYPICAL
R
± 0.001 % (10 ppm)
± 0.001 % (10 ppm)
± 0.001 % (10 ppm)
MAXIMUM
R
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
> 10
4
M
± 0.002 % (20 ppm)
± 0.001 % (10 ppm)
± 0.005 % (50 ppm)
± 0.001 % (10 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.008 % (80 ppm)
± 0.002 % (20 ppm)
± 0.015 % (150 ppm)
± 0.002 % (20 ppm)
± 0.015 % (150 ppm)
± 0.015 % (150 ppm)
± 0.01 % (100 ppm)
Measurement error ± 0.001 %
Document Number: 63127
Revision: 16-Aug-12
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
VPR221SZ (Z-Foil)
Vishay Foil Resistors
TABLE 4 - GLOBAL PART NUMBER INFORMATION
DENOTES PRECISION
Y
VALUE
R
=
(1)
NEW GLOBAL PART NUMBER: Y2123420R220T9L (preferred part number format)
CHARACTERISTICS
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
Y
2
1
2
3
4
2
0
R
2
2
0
T
9
L
PRODUCT CODE
2123
= VPR221SZ
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
PACKAGING
L
= bulk
R
= tape and reel
FOR EXAMPLE: ABOVE GLOBAL ORDER Y2123 420R220 T 9 L:
TYPE: VPR221SZ
VALUE: 420.22
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk
HISTORICAL PART NUMBER: VPR221SZ T 420R22 TCR0.2 T B (will continue to be used)
VPR221SZ
MODEL
T
TERMINATION
T
= lead (Pb)-free
none = tin/lead
420R22
OHMIC VALUE
420.22
TCR0.2
TCR
CHARACTERISTIC
TCR0.2
T
ABSOLUTE
TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
B
PACKAGING
B
= bulk
T
= tape and reel
Note
(1)
For non-standard requests, please contact application engineering
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For any questions, contact:
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Document Number: 63127
Revision: 16-Aug-12
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Vishay Precision Group, Inc.
Disclaimer
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not limited to, the warranty expressed therein.
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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