VPR220S, VPR221S
Vishay Foil Resistors
FEATURES
• Leads preformed for surface mounting
• 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
Product may not
be to scale
• Temperature Coefficient of Resistance: to ± 5ppm/°C
• Resistance Range: 0.5 to 10KΩ
• Tolerance: To ± 0.01%
Models VPR220S AND VPR221S, made from Vishay Bulk
Metal® Foil, offer low TCR, high stability, tight tolerance and fast
response time in a small, molded resistor. Model VPR220S is
a 2 lead device. Model VPR221S is a 4 lead Kelvin connected
device. The 4 leaded version is highly recommended for
precision applications requiring ohmic values of 100R or less.
• Low Thermal EMF: 0.15µV/°C maximum (lead effect)
• Non-Inductive Construction
• Heat sink is isolated
• Tin/Lead (Sn 60% Pb 40%) coated termination standard.
Lead free (100% Sn) option available
TABLE 1 - SPECIFICATIONS
Load Life Stability at 2,000 hrs
± 0.05% max ∆R under full rated power @ + 25°C
Shelf Life Stability
±0.0025% ∆R/year
Power Rating @ + 25°C
8 watts or 3 amps2 on heat sink3
1.5 watts or 3 amps2 in free air
Further derating not necesary.
Current Noise
< 0.010µV (rms)/volt of applied voltage (– 40dB)
High Frequency Operation
Rise/Decay Time
Inductance4 (L)
Capacitance (C)
0.2ns @ 1 Ω
0.1µH maximum: 0.03µH typical1
1.0pF maximum: 0.5pF typical1
Voltage Coefficient5
< 0.1ppm/V
Operating Temperature Range
– 55°C to + 150°C
Maximum Working Voltage
300 V. Not to exceed power rating.
6
Thermal EMF
0.15µV/°C maximum (lead effect)
TABLE 2 - VPR220S
RESISTANCE
RANGE (Ω)
TABLE 3 - VPR221S
TIGHTEST
RESISTANCE TOLERANCE
TCR*
50 to 10K
± 0.01%
± 5ppm/°C
25 to < 50
± 0.02%
± 7ppm/°C
10 to < 25
± 0.05%
± 10ppm/°C
5 to < 10
± 0.1%
± 13ppm/°C
Weight = 1 gram Maximum
*Maximum specifications.
Lower values available but not recommended due to high TCR.
VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31
• GERMANY +49.9287.710 FAX: +49 9287.70435
• ISRAEL +972.3.557.0945 FAX: +972.3.558.9121
Document Number: 63050
Revision 20-Jul-04
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.
RESISTANCE
RANGE (Ω)
TIGHTEST
RESISTANCE TOLERANCE
TCR*
0.5 to < 1
± 0.05%
± 5ppm/°C
1 to < 10
± 0.02%
± 5ppm/°C
10 to 500
± 0.01%
± 5ppm/°C
Weight = 1.2 grams Maximum
*Maximum specifications.
Contact Applications Engineering for other available values.
• ITALY + 39.2.300.11919 FAX: +39.2.300.11999
• JAPAN +81.42.729.0661 FAX: +81.42.729.3400
• SINGAPORE +65.788.6668 FAX: +65.788.0988
• SWEDEN +46.8.594.70590 FAX: +46.8.594.70581
• UK +44 191 514 8237 FAX: +44 1953 457 722
• USA +1 610 407-4800 FAX: +1 610 640-9081
www.vishay.com
33
SURFACE MOUNT
Bulk Metal® Foil Technology
Precision Foil Surface Mount Power Resistors in TO-220 Configuration
