VPR221Z (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil 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
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Temperature Coefficient of Resistance (TCR):
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Any value at any tolerance available within resistance range
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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).
VPR221Z 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
Vishay Bulk Metal
®
Z-Foil resistors, designers can
significantly reduce circuit errors and greatly improve overall
circuit performances.
Model VPR221Z is a 4 lead kelvin connected device.
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Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
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± 0.05 ppm/°C typical (0 °C to + 60 °C)
Pb-free
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
Available
+ 25 °C Ref.) (see table 1)
RoHS*
COMPLIANT
Tolerance: to ± 0.01 %
Power Coefficient “ΔR 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 hours,
at 1.5 W
Resistance Range: 0.5
Ω
to 500
Ω
Electrostatic Discharge (ESD) above 25 000 V
Short Time Overload
≤
0.001 % (10 ppm)
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. 1K234)
For better performances please contact us
TABLE 1 - TCR AND TOLERANCE
TIGHTEST
RESISTANCE
TOLERANCE
± 0.05 %
RESISTANCE
RANGE (Ω)
0.5 to < 1
1 to < 10
TYPICAL TCR AND
MAX. SPREAD
1)
± 0.2 ppm/°C ± 2.8 ppm/°C
Percent of Rated Power
± 0.02 %
± 0.2 ppm/°C ± 2.3 ppm/°C
10 to 500
± 0.01 %
± 0.2 ppm/°C ± 1.8 ppm/°C
Notes
•
1. 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
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63116
Revision: 16-Jul-07
For any questions, contact: foil@vishay.com
www.vishay.com
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APPLICATIONS
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Automatic Test Equipment (ATE)
High Precision Instrumentation
Electron Beam application
Current Sensing applications
I
Pulse applications
Military
I
1
Power amplifier
Power supplies
R
E
1
V
E
2
I
2
I
FIGURE 1- POWER DERATING CURVE
- 55 °C
100
75
50
25
Ambient Temperature (°C)
VPR221Z (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Power Resistor in TO-220
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
Configuration with TCR of ± 0.05 ppm/°C, PCR of
4 ppm/W and Load Life Stability of ± 0.005 % (50 ppm)
FIGURE 3 - TYPICAL TCR CURVE Z-FOIL
(for more details see table 1)
+ 500
+ 400
Mutual Inductance
Reduction due
to Change in
Current Direction
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Note:
Foil shown in
black,
etched spaces in
white
FIGURE 4 - VPR221Z DIMENSIONS
in inches (millimeters)
0.400 ± 0.010
(10.16 ± 0.25)
0.245 ± 0.010
(6.22 ± 0.25)
VISHAY
VPR221Z
1R0 1
%
0101
0.115 ± 0.005
(2.92 ± 0.13)
0.141 ± 0.005 Dia
(3.58 ± 0.13)
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)
0.050 ± 0.005
(1.27 ± 0.13)
0.030 ± 0.002
(0.76 ± 0.05)
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A surface mount version of this product is available see data sheets for VPR220S, VPR221S
TABLE 2 - SPECIFICATIONS
Power Rating at + 25 °C
Current Noise
High Frequency Operation
Rise Time
Inductance
4)
(L)
Capacitance (C)
Voltage Coefficient
5)
Operating Temperature Range
Maximum Working Voltage
Thermal EMF
6)
Weight
8 W or 3 A
2)
on heat sink
3)
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)
1.0 pF maximum: 0.5 pF typical
1)
< 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
4. Inductance (L) mainly due to the leads.
5. The resolution limit of existing test requirement (within the
measurement capability of the equipment, “essentially zero”).
6. µV/°C relates to EMF due to lead temperature difference.
Notes
1. Maximum is 1.0 % A.Q.L. standard for all specifications except
TCR.
2. Whichever is lower.
3. 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
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2
For any questions, contact: foil@vishay.com
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+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
- 400
- 0.16 ppm/°C
- 25
0
0.2 ppm/°C
- 500
- 55
+ 25
+ 60 + 75
+ 100 + 125
Ambient Temperature (°C)
0.150 ± 0.008
(3.81 ± 0.20)
0.050 ± 0.005
(1.27 ± 0.13)
0.615 Max
(15.62)
0.015 ± 0.002
(0.38 ± 0.05)
0.078 ± 0.005
(1.98 ± 0.13)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
+ 300
+ 200
Document Number: 63116
Revision: 16-Jul-07
VPR221Z (Z-Foil)
Ultra High Precision Z-Foil Power Resistor in TO-220
Vishay Foil Resistors
Configuration with TCR of ± 0.05 ppm/°C, PCR of
4 ppm/W and Load Life Stability of ± 0.005 % (50 ppm)
TABLE 3 - PERFORMANCE SPECIFICATIONS
1)
MIL-PRF 39009
TEST OR CONDITION
Low temperature storage 24 hours 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 seconds (in air)
Moisture resistance + 65 °C to - 10 °C, 90 to 98 Rh, 10 days
Terminal Strength
Load life 8 W at + 25 °C, 2000 hours with heat sink
Load life 1.5 W at + 25 °C for 2000 hours in free air
High temperature exposure + 150 °C
Note
1. Measurement error ± 0.001
Ω
MIL-PRF 39009
± 0.3 % + 0.01
Ω
± 0.2 % + 0.01
Ω
± 0.2 % + 0.01
Ω
> 10
4
MΩ
± 0.3 % + 0.01
Ω
TYPICAL
ΔR
± 0.001 % (10 ppm)
± 0.001 % (10 ppm)
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
± 0.005 % (50 ppm)
MAXIMUM
ΔR
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
> 10
4
MΩ
± 0.008 % (80 ppm)
TABLE 4 - GLOBAL PART NUMBER INFORMATION
DENOTES PRECISION
Y
VALUE
R
=
Ω
NEW GLOBAL PART NUMBER: Y1690420R220T9L (preferred part number format)
Y
1
6
9
0
4
2
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PRODUCT CODE
1690
= VPR221Z
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1690 420R220 T 9 L:
TYPE: VPR221Z
VALUE: 420.22
Ω
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: Lead (Pb)-free
PACKAGING: Bulk Pack
HISTORICAL PART NUMBER: VPR221Z T 420R22 TCR0.2 T B (will continue to be used)
VPR221Z
MODEL
T
420R22
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 Pack
TERMINATION
OHMIC VALUE
420.22
Ω
T
= Lead (Pb)-free
none = Tin/Lead
Note
* For non-standard requests, please contact Application Engineering.
Document Number: 63116
Revision: 16-Jul-07
For any questions, contact: foil@vishay.com
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± 0.3 % + 0.01
Ω
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
± 0.5 % + 0.01
Ω
± 0.015 % (150 ppm)
± 0.002 % (20 ppm)
± 0.2 % + 0.01
Ω
± 0.001 % (10 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 1.0 % + 0.01
Ω
± 0.015 % (150 ppm)
± 0.01 % (100 ppm)
± 1.0 % + 0.01
Ω
± 0.015 % (150 ppm)
± 1.0 % + 0.05
Ω
± 0.005 % (50 ppm)
AER*
0
= Standard
9
= Lead (Pb)-free
1 - 999
= Custom
0
R
2
2
0
T
9
L
PACKAGING
L
= Bulk Pack
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3
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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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