VISHAY VPR220, VPR221 Technical data
VISHAY FOIL RESISTORS, 63 Lincoln Highway, P.O. Box 4004, Malvern, PA 19355-0988 • Phone (610) 644-1300
App. Eng. Phone (610) 251-5289 • App. Eng. Fax (610) 640-4487 • Sales Phone (610) 251-5842 • Sales Fax (610) 640-9081
P R E C I S I O N B U L K M E T A L ® F O I L T E C H N O L O G Y
33
Weight = 1.2 gms Max. * Maximum specifications.
Higher values available.
0.1 Ohms Available soon.
VISHAY MODELS VPR220 AND VPR221
Precision Foil Power Resistors in TO 220 Configuration
Models VPR220 AND VPR221, made from Vishay Bulk Metal® foil,
offer low TCR, high stability, tight tolerance and fast response
time in a small, molded resistor. Model VPR220 is a 2 lead device. Model VPR221 is a 4 lead Kelvin connected device. The 4
leaded version is highly recommended for precision applications
requiring ohmic values of 100R or less.
FEATURES
• Power: 8 watts chassis mounted (per MIL-R-39009)
• Load Life Stability: ±0.05% maximum ∆R at rated power
and temperature for 2,000 hours
• Temperature Coefficient of Resistance: to ±5 ppm/°C
• Resistance Range: 0.5 to 10K Ω
• Tolerance: To ±0.01%
• Low Thermal EMF: 0.15 µV/°C maximum (lead effect)
• Non-Inductive Construction
• Heat sink is Isolated
FIGURE 1 - VPR220 DIMENSIONS
0.400 ±0.010
(10.16 ±0.25)
VISHAY
VPR220
1K0 1%
9801
0.245 ±0.010
(6.22 ±0.25)
0.141 ±0.005 Dia
(3.58 ±0.13)
0.540 ±0.040
(13.72 ±1.02)
0.030 ±0.002
(0.76 ±0.05)
0.200 ±0.005
(5.08 ±0.13)
0.115 ±0.005
(2.92 ±0.13)
0.050 ±0.005
(1.27 ±0.13)
0.150 ±0.008
(3.81 ±0.2)
0.615 Max
(15.62)
0.078 ±0.005
(1.98 ±0.13)
0.015 ±0.002
(0.38 ±0.05)
0.050 ±0.005
(1.27 ±0.13)
0.200 ±0.030
(5.08 ±0.76)
Resistance Tightest TCR*
Range (Ω) Resistance Tolerance
50 to 10K ±0.01% ±5 ppm/°C
25 to <50 ±0.02% ±7 ppm/°C
10 to <25 ±0.05% ±10 ppm/°C
5 to <10 ±0.1% ±13 ppm/°C
Weight = 1 gm Max. * Maximum specifications.
Lower values available but not recommended due to high TCR.
FIGURE 2 - VPR221 DIMENSIONS
Resistance Tightest TCR*
Range (Ω) Resistance Tolerance
10 to 500 ±0.01% ±5 ppm/°C
1 to <10 ±0.02% ±5 ppm/°C
0.5 to <1 ±0.05% ± 5 ppm/° C
E
2
0.050 ±0.005
(1.27 ±0.13)
0.150 ±0.008
(3.81 ±0.2)
0.615 Max
(15.62)
0.078 ±0.005
(1.98 ±0.13)
0.015 ±0.002
(0.38 ±0.05)
0.030 ±0.002
(0.76 ±0.05)
0.100 ±0.005
(2.54 ±0.13)
0.400 ±0.010
(10.16 ±0.25)
VISHAY
VPR221
1K0 1%
9801
0.245 ±0.010
(6.22 ±0.25)
0.141 ±0.005 Dia
(3.58 ±0.13)
0.540 ±0.040
(13.72 ±1.02)
0.115 ±0.005
(2.92 ±0.13)
0.050 ±0.005
(1.27 ±0.13)
0.200 ±0.030
(5.08 ±0.76)
E1I
2
I
1
THROUGH
HOLE
P R E C I S I O N B U L K M E T A L ® F O I L T E C H N O L O G Y
VISHAY FOIL RESISTORS, 63 Lincoln Highway, P.O. Box 4004, Malvern, PA 19355-0988 • Phone (610) 644-1300
App. Eng. Phone (610) 251-5289 • App. Eng. Fax (610) 640-4487 • Sales Phone (610) 251-5842 • Sales Fax (610) 640-9081
34
VISHAY MODELS VPR220 AND VPR221
Precision Foil Power Resistors in TO 220 Configuration
TABLE 1 - SPECIFICATIONS
Load Life Stability at 2,000 hrs
Shelf Life Stability
Power Rating @ +25°C
Current Noise
High Frequency Operation
Rise/Decay Time
Inductance
4
(L)
Capacitance (C)
Voltage Coefficient
5
Operating Temperature Range
Maximum Working Voltage
Thermal EMF
6
±0.05% max ∆R under full rated power @ +25°C
±0.0025% ∆R/yr
8 watts or 3 amps
2
on heat sink
3
1.5 watts or 3 amps2 in free air
Further derating not necesary.
<0.010 µV (rms)/volt of applied voltage (–40 dB)
0.2 ns @ 1 Ω
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)
NOTES:
1. Maximum is 1.0% A. Q.L. standard for all specifications except
TCR. Typical is a designers reference which represents that
85% of the units supplied, over a long period of time, will be at
least the figure shown or better.
2. Whichever is lower.
3. Heat sink chassis dimensions and requirements per
MIL-R-39009/1B:
Dimension Inches mm
L 6.00 152.4
W 4.00 101.6
H 2.00 50.8
T 0.04 1.0
4. Inductance (L) due mainly to the leads.
5. The resolution limit of existing test equipment (within the
measurement capability of the equipment, “essentially zero”).
6. µV/°C relates to EMF due to lead temperature difference.
FIGURE 3 - VPR221S DIMENSIONS
0.030 ±0.002
(0.76 ±0.05)
0.400 ±0.010
(10.16 ±0.25)
0.615 Max
(15.62)
0.141 ±0.005 Dia
(3.58 ±0.13)
0.540 ±0.040
(13.72 ±1.02)
0.115 ±0.005
(2.92 ±0.13)
0.050 ±0.005
(1.27 ±0.13)
0.200 (5.08) Ref
0.365 (9.271) Ref
0.050 ±0.005
(1.27 ±0.13)
0.150 ±0.008
(3.81 ±0.2)
0.015 ±0.002
(0.381 ±0.05)
0.078 ±0.005
(1.98 ±0.13)
Heat Sink
0.695 ±0.010
(17.65 ±0.25)
0.090 ±0.010
(2.286 ±0.25)
0.090 (2.286) Ref
0.110 (2.794) Ref
Flush with Heat Sink
Within ±0.002 (±0.051)
Before Forming
After Forming
Solder Coated
Copper
VPR220S dimensions similar.
+100
+75
+50
+25
0
+25 +50 +75 +100 +125 +150
Ambient Temperature (°C)
Percent of Rated Power
FIGURE 4 - POWER DERATING CURVE
HOW TO ORDER VPR220 AND VPR221 PARTS:
Specify Vishay VPR220 or VPR221 resistors as follows:
Example: VPR221 5R0000 1.0%
Model No. Resistance Value Tolerance
Specify Vishay VPR220S or VPR221S for surface mount
resistors as follows:
Example: VPR221S 5R0000 1.0%
Model No. Resistance Value Tolerance
Resistance value, in ohms, is expressed by a series of 6 characters, 5 of which
represent significant digits while the 6th is a dual purpose letter that designates
both the multiplier and the location of the comma or decimal.
Resistance Letter Multiplier
Range Designator Factor Example
0.5 Ω to < 1K Ω R x1 100R01 = 100.01 Ω
1K Ω to 10K Ω K x10
3
5K2310 = 5,231 Ω
THROUGH
HOLE
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