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 MODELS VPR220 AND VPR221 Precision Foil Power Resistors in TO 220 Configuration 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) 0.150 ±0.008 (3.81 ±0.2) 0.115 ±0.005 (2.92 ±0.13) 0.245 ±0.010 (6.22 ±0.25) VISHAY VPR220 1K0 1% 9801 0.141 ±0.005 Dia (3.58 ±0.13) 0.200 ±0.030 (5.08 ±0.76) 0.050 ±0.005 (1.27 ±0.13) 0.540 ±0.040 (13.72 ±1.02) FIGURE 2 - VPR221 DIMENSIONS 0.050 ±0.005 (1.27 ±0.13) 0.400 ±0.010 (10.16 ±0.25) VISHAY VPR221 1K0 1% 9801 0.030 ±0.002 (0.76 ±0.05) 0.615 Max (15.62) 0.050 ±0.005 (1.27 ±0.13) 0.540 ±0.040 (13.72 ±1.02) 0.030 ±0.002 (0.76 ±0.05) I1 E1 E2 I2 0.078 ±0.005 (1.98 ±0.13) 0.200 ±0.005 (5.08 ±0.13) 0.141 ±0.005 Dia (3.58 ±0.13) 0.200 ±0.030 (5.08 ±0.76) 0.015 ±0.002 (0.38 ±0.05) 0.050 ±0.005 (1.27 ±0.13) 0.115 ±0.005 (2.92 ±0.13) 0.245 ±0.010 (6.22 ±0.25) 0.615 Max (15.62) 0.150 ±0.008 (3.81 ±0.2) 0.015 ±0.002 (0.38 ±0.05) 0.078 ±0.005 (1.98 ±0.13) 0.100 ±0.005 (2.54 ±0.13) Resistance Range (Ω) 50 to 10K Tightest Resistance Tolerance ±0.01% TCR* ±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. Resistance Range (Ω) Tightest Resistance Tolerance TCR* 10 to 500 ±0.01% ±5 ppm/°C 1 to <10 ±0.02% ±5 ppm/°C ±0.05% ±5 ppm/°C 0.5 to <1 Weight = 1.2 gms Max. * Maximum specifications. Higher values available. 0.1 Ohms Available soon. 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 33 THROUGH HOLE 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. 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 MODELS VPR220 AND VPR221 Precision Foil Power Resistors in TO 220 Configuration NOTES: Load Life Stability at 2,000 hrs ±0.05% max ∆R under full rated power @ +25°C Shelf Life Stability ±0.0025% ∆R/yr 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 <0.010 µV (rms)/volt of applied voltage (–40 dB) High Frequency Operation Rise/Decay Time Inductance4 (L) Capacitance (C) 0.2 ns @ 1 Ω 0.1 µH maximum: 0.03 µH typical1 1.0 pF maximum: 0.5 pF typical1 Voltage Coefficient5 <0.1 ppm/V Operating Temperature Range –55°C to +150°C Maximum Working Voltage 300 V. Not to exceed power rating. 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 L W H T Inches 6.00 4.00 2.00 0.04 mm 152.4 101.6 50.8 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. 0.15 µV/°C maximum (lead effect) 6 Thermal EMF FIGURE 3 - VPR221S DIMENSIONS FIGURE 4 - POWER DERATING CURVE 0.050 ±0.005 (1.27 ±0.13) 0.115 ±0.005 (2.92 ±0.13) +100 0.030 ±0.002 (0.76 ±0.05) 0.141 ±0.005 Dia (3.58 ±0.13) 0.400 ±0.010 (10.16 ±0.25) Solder Coated Copper 0.615 Max (15.62) 0.540 ±0.040 (13.72 ±1.02) Percent of Rated Power THROUGH HOLE TABLE 1 - SPECIFICATIONS +75 +50 +25 0.200 (5.08) Ref 0 +25 +50 +75 +100 +125 +150 Ambient Temperature (°C) 0.365 (9.271) Ref 0.050 ±0.005 (1.27 ±0.13) 0.015 ±0.002 (0.381 ±0.05) 0.150 ±0.008 (3.81 ±0.2) HOW TO ORDER VPR220 AND VPR221 PARTS: 0.078 ±0.005 (1.98 ±0.13) Before Forming Specify Vishay VPR220 or VPR221 resistors as follows: Example: 0.695 ±0.010 (17.65 ±0.25) 0.110 (2.794) Ref 0.090 (2.286) Ref 0.090 ±0.010 (2.286 ±0.25) Heat Sink VPR220S dimensions similar. After Forming Flush with Heat Sink Within ±0.002 (±0.051) 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 Range 0.5 Ω to < 1K Ω 1K Ω to 10K Ω 34 Letter Designator R K Multiplier Factor x1 x103 Example 100R01 = 100.01 Ω 5K2310 = 5,231 Ω 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