VHP-3, VHP-4, VPR247 Vishay Foil Resistors Bulk Metal(R) Foil Technology Hermetically Sealed Power and Current Sensing Resistors FEATURES * Temperature Coefficient of Resistance Nominal TCR3: + 0.6ppm/C (0C to + 25C); - 0.6ppm/C (+ 25C to + 60C); + 2.2ppm/C (- 55C to + 25C); - 1.8 ppm/C (+ 25C to + 125C) Product may not be to scale Standard TCR Spread from Nominal4: 1.5ppm/C (0C to + 25C and + 25C to + 60C); 2.0ppm/C (- 55C to + 25C and + 25C to + 125C) * Selected TCR Tracking: 0.5ppm/C (R) Vishay Bulk Metal Foil power resistors offer the best approach to low value power and current sensing when a combination of accuracy, tight TCR, low thermal EMF, low voltage coefficient, Kelvin connection, and long term stability (under power) are required. Vishay Models VHP-3 and VHP-4 offer all welded construction and screw mounting directly to a metal heat sink for maximum heat transfer. Hermetic sealing and nitrogen back fill provide the maximum protection against environmental stresses. Long term stability is thereby ensured. A special feature of this construction is Kovar eyelet's and OFHC solder plated copper leads providing the lowest thermal EMFs in the industry. Vishay Model VPR247 has many of the advantages of the VHP-4 but with significantly reduced size and weight. * Load-Life Stability: 0.01% Max R, 3 watts on heat sink at + 25C, 2000 hrs. 0.05% Max R, 10 watts on heat sink at + 25C, 2000 hrs. 0.05% Max R, 3 watts in still air at + 25C, 2000 hrs. * Shelf Life Stability: 5ppm/year * Power Rating: 10 W, heat sink, + 25C; 3 W, free air, + 25C * Resistance Tolerance (Initial Resistance Accuracy): 0.01% tightest to 5.0% loosest * Resistance Range: 0.05 to 80K * Current Noise: < 0.010V (RMS)/Volt of Applied Voltage * Thermal EMF: 0.1V/C (lead effect), 2.5V/watt (power effect) * Non-Inductive Design: Standard TABLE 2 - VHP-4 AND VPR247 SPECIFICATIONS* TABLE 1 - VHP-3* SPECIFICATIONS RESISTANCE RANGE () TIGHTEST RESISTANCE TOLERANCE1 TCR 50 to 80K 0.01% 5ppm/C 25 to < 50 0.02% 7ppm/C 10 to < 25 0.05% 10ppm/C 1 to < 2 0.1% 10ppm/C 5 to < 10 0.1% 13ppm/C 0.5 to < 1 0.25% 15ppm/C 2 to < 5 0.25% 20ppm/C 0.25 to < 0.5 0.5% 20ppm/C 1 to < 2 0.5% 25ppm/C 0.1 to < 0.25 1.0% 25ppm/C 0.5 to < 1 1.0% 0.05 to < 0.1 2.0% 30ppm/C 0.25 to < 0.5 2.0% 0.1 to < 0.25 5.0% 50ppm/C RESISTANCE RANGE () TIGHTEST RESISTANCE TOLERANCE1 TCR 10 to 500 0.01% 5ppm/C 5 to <10 0.02% 6ppm/C 2 to < 5 0.05% 8ppm/C *Weight of VHP-3 and VHP-4 = 15 grams Max. VPR247 = 7 grams Max. Available only up to 500 ohms See last page in this data sheet for numbered footnotes. SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63005 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 08-Mar-05 www.vishay.com 105 THROUGH HOLE Maximum TCR Spread from Nominal5: 2.5ppm/C (0C to + 25C and + 25C to + 60C); 2.3ppm/C (- 55C to + 25C and + 25C to + 125C) VHP-3, VHP-4, VPR247 Bulk Metal(R) Foil Technology Hermetically Sealed Power and Current Sensing Resistors Vishay Foil Resistors TABLE 3 - GENERAL SPECIFICATIONS Stability Load Life 2,000 hrs. Shelf Life 0.05% maximum R, 3 watts in still air @ + 25C 0.05% maximum R under full rated power (10 W @ + 25C on heat sink) 0.0005% (5ppm) maximum R/year Power Rating At + 25C At Ambient Temperature (See Fig.3) 10 watts or 3 amps6-- heat sink7 3 watts or 3 amps6-- free air < 0.010V (RMS)/Volt of applied voltage (- 40dB) High Frequency Operation Rise/Decay Time Inductance (L)8 Capacitance (C) 1.0ns at 1K 0.1H maximum; 0.08H typical 1.0pF maximum; 0.5pF typical Voltage Coefficient < 0.1ppm/V9 Operating Temperature Range - 55C to + 150C Hermeticity 10-7 Atmospheric cc/sec maximum Maximum Working Voltage10 Thermal EMF 600 V 11 0.1V/C maximum (lead effect) 2.5V/watt maximum (power effect) FIGURE 1 - POWER DERATING CURVE Percent of Rated Power THROUGH HOLE Current Noise +100 -55C Rated Power FIGURE 2 - KELVIN CONNECTION I1 r1 R r2 I2 +75 r3 +50 +25 0 -75 -50 -25 0 Im r4 0 +25 +50 +75 +100 +125 +150 +175 Ambient Temperature (C) r5 Kelvin, 4-terminal, connections are utilized for these low ohmic value products to measure a precise voltage drop across the resistive element. In these applications the contact resistance, lead resistance, and their TCR effect may be greater than that of the element itself and could cause significant errors if the standard 2-terminal connection is used. Figure 2 shows a high impedance measurement system where r5 approaches infinity and Im approaches zero resulting in negligible IR drop through r3 and r4 which negates their lead resistance and TCR effect. With the voltage sense leads E1 and E2 inside of r1 and r2 the resistance and TCR effect of the current leads, I1 and I2 are negated and only the resistance and TCR of the element R are sensed. This method of measurement is essential for precise current sensing. TABLE 4 - ORDERING INFORMATION Please specify Vishay VHP-3, VHP-4 and VPR247 series resistors as follows: Example: VHP-3 500R00 0.01% MODEL NO. RESISTANCE VALUE TOLERANCE Resistance Value, in , 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 0.05 to < 1K R x1 100R01 = 100.01 1K to < 80K K x 103 15K231 = 15,231 SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com www.vishay.com 106 For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63005 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 08-Mar-05 VHP-3, VHP-4, VPR247 (R) Bulk Metal Foil Technology Vishay Foil Resistors Hermetically Sealed Power and Current Sensing Resistors VHP-4 (4 terminal) 0.770 (19.56) max dia Mounting Hole I2 0.222 (5.64) E1 E2 TO-3 cap TO-3 base 0.040 (1.00) dia 0.005 ( 0.13) Model No. Res. Val. Res. Tol. Date Code Ex: 98 02 Year Week 0.43 (10.92) 0.01 ( 0.25) 1.00 (25.4) 0.005 ( 0.13) 0.156 dia (3.9) 0.005 ( 0.13) VISHAY VHP-3 21K500 0.01% 9802 I1 I2 E1 E2 Case not active; insulators not required; mounting hardware not supplied. FIGURE 4 - VPR247 STANDARD IMPRINTING AND DIMENSIONS B W L 0.140 0.005 C (Dia. Thru Hole) H 0.010 max Sleeve Extension VISHAY VPR247 XXXX 0R2000 1% Date Code 10 01 Year Week Tolerance Resistance Value I1 E1 E2 I2 S Gold Plated Copper Leads 0.025 Dia LL A LS DIMENSION INCHES MM L 0.690 0.005 17.53 0.13 H 0.820 0.005 20.83 0.13 W 0.215 0.005 5.46 0.13 LL 0.500 Min 12.70 Min LS 0.100 0.005 2.54 0.13 S 0.200 0.005 5.08 0.13 A 0.120 0.005 3.05 0.13 B 0.040 0.005 1.02 0.13 C 0.120 0.005 3.05 0.13 SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63005 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 08-Mar-05 www.vishay.com 107 THROUGH HOLE 0.156 dia (3.9) 0.005 ( 0.13) I1 0.665 (16.89) 0.005 ( 0.13) 1.186 (30.13) 0.005 ( 0.13) 1.530 (38.86) 0.005 ( 0.13) 0.665 (16.89) 0.005 ( 0.13) 1.186 (30.13) 0.005 ( 0.13) 1.530 (38.86) 0.005 ( 0.13) Mounting Hole Standard Marking Arrangement 0.45 (11.43) min. VHP-3 0.266 (6.76) 0.005 ( 0.13) 0.335 (8.51) 0.005 ( 0.13) FIGURE 3 - VHP-3, VHP-4 STANDARD IMPRINTING AND DIMENSIONS in inches (millimeters) VHP-3, VHP-4, VPR247 Bulk Metal(R) Foil Technology Hermetically Sealed Power and Current Sensing Resistors Vishay Foil Resistors + 25C and + 25C to + 60C ("Instrument" Range); and from - 55C to + 25C and + 25C to + 125C ("Military" Range). These specifications and the definition of Nominal TCR apply to all resistance values including low-value resistors. TABLE 5 - ENVIRONMENTAL PERFORMANCE Method MIL-R-39009B Paragraph12 R Limits Test Group I Conditioning THROUGH HOLE Test Group II Resistance Temperature Characteristic13 (- 55C to + 125C) 4.7.2 4.7.4 0.2% + 0.05 VHP-3, VHP-4 and VPR247 Typ2 R Test Data16 0.03% 4.7.5 0.5% + 0.05 0.01% Low Temperature Storage 4.7.17 0.3% + 0.05 0.005% DWV (300 V @ atmospheric pressure) 4.7.6 0.2% + 0.05 0.005% Insulation Resistance 4.7.7 104M > 104M Low Temperature Operation 4.7.8 0.3% + 0.05 0.01% Momentary Overload15 (5 sec. @ 15 watts) 4.7.9 0.3% + 0.05 0.03% Moisture Resistance 4.7.10 0.5% + 0.05 0.02% Terminal Strength 4.7.11 0.2% + 0.05 0.005% Test Group III Shock - Medium Impact (Post-test DWV @ 300 V) 4.7.12 0.2% + 0.05 0.005% Test Group V High Temperature Exposure 2,000 hrs. @ + 150C 4.7.13 0.2% + 0.05 Vishay Maximum TCR Spread is defined as the 3 (Sigma) limit of a normal Gaussian distribution (99.73% of a production lot) which is within a band, centered on the nominal curve. This Vishay Maximum TCR Spread is no greater than 2.5ppm/C from nominal throughout the full temperature range. This definition of the Vishay Maximum TCR Spread from Nominal applies to all resistance values. However, as the resistance value decreases below 80, the Vishay maximum TCR Spread from Nominal specification starts to increase. (See Fig. 3 in data sheet "7 Technical Reasons to Specify Vishay Bulk Metal(R) Foil Resistive Components.") Whichever is lower. 6. 7. Heat sink chassis dimensions and requirements per MIL-R-39009/1B: 0.005% 1.0% + 0.05 0.01% --- --- 0.04% 4.7.15 1.0% + 0.05 0.05% NOTES: 1. Standard resistance tolerances-- 0.01%; 0.02%; 0.05%; 0.1%; 0.25% 0.5%; 1.0%; 2.0%; 5.0% ( 0.005% tolerance available on special order). 2. Maximum is 1.0% A.Q.L. standard for all specifications except TCR. (For TCR information, see notes 3-5). 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. 3. 5. INCHES MM 6.00 152.4 W 4.00 101.6 H 2.00 50.8 T 0.04 1.0 L Test Group IV Life Test 10 W @ 25C for 2,000 hrs. 4.7.14 80% power @ + 70C for 2,000 hrs Vishay Standard TCR Spread is defined as a designers reference which represents that at least 92% of the units, and 82% of the lots, supplied by Vishay will be within the stated band centered on the nominal curve. This definition of the Vishay Standard TCR Spread from Nominal applies to all resistance values. However, as the resistance value decreases below 80, the Vishay Standard TCR Spread from Nominal specification starts to increase. (See Fig. 3 in data sheet "7 Technical Reasons to Specify Vishay Bulk Metal(R) Foil Resistive Components.") < 1: See Tables 1 & 2, Page 20 100ppm/C; 1 to 19.6: 50ppm/C; 20: 30ppm/C High Temperature14 (2 hrs. @ + 150C) Vibration - High Frequency (Post-test DWV @ 300 V) 4. Vishay Nominal TCR is defined as the chord slopes of the relative change of resistance/temperature, expressed in ppm (parts per million), called (RT) curve from 0C to 8. 9. Inductance (L) due mainly to the leads. The resolution limit of existing test equipment (within the measurement capability of the equipment, or "essentially zero"). 10. Not to exceed power rating of resistor. 11. V/C relates to EMF due to lead temperature difference and V/watt due to power applied to the resistor. 12. Vishay test data as compared to MIL-R-39009 is shown for illustration purposes, Vishay test conditions that deviate from the Mil test method are noted within parentheses. 13. Maximum specifications. See Tables 1 and 2 in data sheet "VHP-3, VHP-4, VPR2347." 14. Maximum ambient temperature rating is + 150C. 15. Maximum overload rating is 15 Watts (5 x rated power in free air; 1.5 x rated power on heatsink), with applied voltage not to exceed 750V. 16. R's are as shown plus 0.001 ohms to allow for measurement errors at low resistance values. SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com www.vishay.com 108 For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63005 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 08-Mar-05