VPR220S, VPR221S Vishay Foil Resistors Bulk Metal Foil Technology Precision Foil Power Surface Mount Resistors in TO-220 Configuration with TCR of 2 ppm/C, Tolerance of to 0.01 % and Power Rating to 8 W FEATURES Temperature coefficient of resistance (TCR): 2 ppm/C typical (- 55 C to + 125 C, + 25 C Ref.) Tolerance: to 0.01 % (see tables 1 and 2) Electrostatic discharge (ESD): above 25 000 V Load life stability: 0.005 % (25 C, 2000 h at rated power) Resistance range: 0.5 to 10 k Any value at any tolerance within resistance range Power rating: 8 W chassis mounted (per MIL-PRF-39009) Non inductive, non capacitive design Models VPR220S AND VPR221S, made from Vishay Bulk Rise time: 1 ns without ringing Metal foil, offer low TCR, high stability, tight tolerance and Current noise: < - 40 dB fast response time in a small, molded resistor. Model Voltage coefficient: < 0.1 ppm/V VPR220S is a 2 lead device. Model VPR221S is a 4 lead Non inductive: < 0.08 H Kelvin connected device. The 4 leaded version is highly Non hot spot design recommended for precision applications requiring ohmic Thermal EMF: 0.05 V/C typical values of 100R or less. Terminal finishes available: lead (Pb)-free tin/lead alloy Any value available within resistance range (e.g. 1K234) TABLE 1 - VPR220S Prototype samples available from 48 h. For more information, please contact foil vishaypg.com RESISTANCE TIGHTEST TYPICAL MAXIMUM 1) 2) 2) For better performances, please see VPR220SZ and RANGE () TOLERANCE TCR TCR VPR221SZ datasheets 50 to 10K 0.01 % 2 5 ppm/C 25 to < 50 0.02 % 2 7 ppm/C R I 10 to < 25 0.05 % 2 10 ppm/C I 5 to < 10 0.1 % 2 13 ppm/C I E E I 1 1 2 2 weight = 1 g maximum V Notes 1. Lower or high values available upon request 2. - 55 C to + 125 C, + 25 C ref. FIGURE 1 - POWER DERATING CURVE - 55 C + 100 TABLE 2 - VPR221S RESISTANCE TIGHTEST TYPICAL MAXIMUM + 75 1) 2) 2) RANGE () TOLERANCE TCR TCR 2 10 to < 500 0.01 % 5 ppm/C + 50 2 1 to < 10 0.02 % 5 ppm/C + 25 2 0.5 to < 1 0.05 % 5 ppm/C 0 weight = 1.2 g maximum - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 Ambient Temperature (C) Notes 1. Lower or high values available upon request 2. - 55 C to + 125 C, + 25 C ref. * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63050 For any questions, contact: foil vishaypg.com www.foilresistors.com Revision: 23-Mar-10 1 Percent of Rated PowerVPR220S, VPR221S Vishay Foil Resistors FIGURE 2 - TYPICAL TCR CURVE FIGURE 3 - TRIMMING TO VALUES (Conceptual Illustration) + 150 + 100 Current Path + 50 Interloop Capacitance Before Trimming Reduction in Series R 0 R (ppm) Current Path - 50 After Trimming Mutual Inductance Trimming Process - 100 Reduction due Removes this Material to Opposing from Shorting Strip Area - 150 Current in 2 ppm/C (+ 25 C Reference) Changing Current Path Adjacent Lines and Increasing - 200 Resistance - 50 - 25 0 + 20 + 50 + 75 + 100 + 125 - 55 Ambient Temperature (C) Note: Foil shown in black, etched spaces in white TABLE 3 - SPECIFICATIONS Load Life Stability at 2000 h 0.05 % max. R under full rated power at + 25 C 1) 2) 8 W or 3 A on heat sink 1) Power Rating at + 25 C 1.5 W or 3 A in free air Further derating not necessary Current Noise < 0.010 V (rms)/V of applied voltage (- 40 dB) High Frequency Operation Rise time 1 ns without ringing 3) Inductance (L) 0.1 H maximum: 0.03 H typical Capacitance (C) 1.0 pF maximum: 0.5 pF typical 4) Voltage Coefficient < 0.1 ppm/V Operating Temperature Range - 55 C to + 150 C Maximum Working Voltage 300 V. Not to exceed power rating 5) Thermal EMF 0.15 V/C maximum (lead effect) Notes 1. Whichever is lower 2. 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 3. Inductance (L) due mainly to the leads 4. The resolution limit of existing test equipment (within the measurement capability of the equipment, or essentially zero) 5. V/C relates to EMF due to lead temperature difference www.foilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63050 2 Revision: 23-Mar-10