PSF www.vishay.com Vishay Dale Metal Film Resistors, High Precision, High Stability, Surface Mount FEATURES • Extremely low temperature coefficient of resistance • Molded encapsulation • Wraparound compliant terminations eliminate the risk of solder fillet cracking • Solderable terminations • Excellent stability at different environmental conditions • For axial-leaded product, see Vishay Dale’s PTF datasheet (www.vishay.com/doc?31019) • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 Note * Lead (Pb)-containing terminations are not RoHS-compliant. Exemptions may apply. STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL SIZE INCH POWER RATING P85 °C W MAXIMUM WORKING VOLTAGE (1) VDC TEMPERATURE COEFFICIENT ± ppm/°C PSF2012 2012 0.125 200 5, 10, 15, 25 PSF4527 4527 0.25 300 5, 10, 15, 25 TOLERANCE ±% 0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1 0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1 RESISTANCE RANGE ENCAPSULATION 15 to 100K Epoxy 15 to 500K Thermoplastic Notes • Marking: Print-marked-model, value, tolerance, TC, date code. • DSCC has created a drawing to support the need for a precision 2012-sized product. Vishay Dale is listed as a resource on this drawing as follows:. DSCC DRAWING NUMBER POWER RATING P85 °C W VISHAY DALE MODEL RESISTANCE RANGE TOLERANCE ±% TEMPERATURE COEFFICIENT ± ppm/°C MAX. WORKING VOLTAGE (1) VDC 0.01, 0.02, 0.05, 5, 10 0.1, 0.25, 0.5, 1 • This drawing can be reviewed at: www.landandmaritime.dla.mil/Programs/MilSpec/ListDwgs.aspx?DocTYPE=DSCCdwg. (1) Continuous working voltage shall be P x R or maximum working voltage, whichever is less. 02001 PSF2012..1 0.125 15 to 100 K 200 TECHNICAL SPECIFICATIONS PARAMETER Rated dissipation at 85 °C Limiting element voltage Insulation voltage (1 min) Thermal resistance Insulation resistance Category temperature range Failure rate Weight/1000 pieces (typical) UNIT W V Veff K/W °C 10-9/h g PSF2012 0.125 200 PSF4527 0.25 300 > 500 < 1300 < 520 1011 - 55 to + 150 <1 90 760 GLOBAL PART NUMBER INFORMATION New Global Part Numbering: PSF201220K50BYTA (preferred part number format) P S F 2 0 1 2 2 0 K 5 0 B Y T A GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE TEMP. COEFFICIENT PACKAGING SPECIAL PSF2012 PSF4527 R= K = k 15R00 = 15 1K000 = 1 k 500K0 = 500 k T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F=±1% Z = ± 5 ppm/°C Y = ± 10 ppm/°C X = ± 15 ppm/°C E = ± 25 ppm/°C 0 = Special EK = Lead (Pb)-free, bulk EA = Lead (Pb)-free, T/R Blank = Standard (Dash number) (Up to 2 digits) From 1 to 99 as applicable BA = Tin/lead, bulk TA = Tin/lead, T/R (full) Note • For additional information on packaging, refer to the Surface Mount Resistor Packaging document (www.vishay.com/doc?31543). Revision: 13-Jul-12 Document Number: 30162 1 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 PSF www.vishay.com Vishay Dale DIMENSIONS in inches (millimeters) W H l b W 1 T a L MODEL L H T W W1 PSF2012 0.200 ± 0.020 (5.08 ± 0.508) 0.096 ± 0.015 (2.44 ± 0.381) 0.040 ± 0.010 (1.02 ± 0.254) 0.125 ± 0.005 (3.18 ± 0.127) 0.050 ± 0.005 (1.27 ± 0.127) PSF4527 0.455 ± 0.020 (11.56 ± 0.508) 0.167 ± 0.010 (4.24 ± 0.254) 0.100 ± 0.010 (2.54 ± 0.254) 0.275 ± 0.005 (6.98 ± 0.127) 0.215 ± 0.005 (5.46 ± 0.127) SOLDER PAD DIMENSIONS in inches (millimeters) MODEL A B L PSF2012 0.085 (2.16) 0.070 (1.78) 0.080 (2.03) PSF4527 0.155 (3.94) 0.230 (5.94) 0.205 (5.21) DERATING 200 150 PSF4527 PSF2012 100 RATED POWER IN % HEAT RISE IN °C (ABOVE AMBIENT) THERMAL RESISTANCE 120 100 80 60 40 50 20 0 0 0.5 1.0 1.5 2.0 POWER IN W 0 - 55 - 25 0 25 50 75 100 85 125 150 175 200 AMBIENT TEMPERATURE IN °C MATERIAL SPECIFICATIONS Element Precision deposited nickel chrome alloy with controlled annealing Encapsulation Molded epoxy on the 2012 and molded thermoplastic on the 4527 Core Fire-cleaned high purity ceramic Termination Standard leadframe material is solder-coated copper on the 2012 and solder-coated bronze on the 4527 PACKAGING REEL MODEL TAPE WIDTH DIAMETER PIECES/REEL PSF2012 12 mm/embossed plastic 330 mm/13" PSF4527 24 mm/embossed plastic 330 mm/13" PACKAGING CODE LEAD (Pb)-FREE LEAD (Pb)-BEARING 2000 EA TA 1200 EA TA Note • Embossed carrier tape per EIA-481. Revision: 13-Jul-12 Document Number: 30162 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 PSF www.vishay.com Vishay Dale TEMPERATURE COEFFICIENT OF RESISTANCE Temperature coefficient (TC) of resistance is normally stated as the maximum amount of resistance change from the original + 25 °C value as the ambient temperature increases or decreases. This is most commonly expressed in parts per million per degree centigrade (ppm/°C). The resistance curve over the operating temperature range is usually a non-linear curve within predictable maximum limits. PSF resistors have a very uniform resistance temperature characteristic when measured over the operating range of - 20 °C to + 85 °C. The standard temperature coefficients available are E = ± 25 ppm/°C, X = ± 15 ppm/°C, Y = ± 10 ppm/°C, and Z = ± 5 ppm/°C. ppm/°C ADDITION TO BASE TC IN THE EXPANDED PORTION OF THE TEMPERATURE RANGE Some applications of the PSF require operation beyond the specifications of - 20 °C to + 85 °C. The change in temperature coefficient of resistance is very small (less than ± 0.05 ppm/°C) over the expanded temperature range of - 55 °C to + 150 °C. Therefore, when operating outside the range of - 20 °C to + 85 °C, the designer can plan for a worst case addition of ± 0.05 ppm/°C for each degree centigrade beyond either - 20 °C or + 85 °C as indicated in the graph. This applies to all four temperature coefficient codes. 4 3 2 1 - 20 °C to + 85 °C BASE TC LIMIT 0 - 50 - 40 - 30 90 - 20 EXPANDED OPERATING RANGE - 55 °C to - 20 °C E, X, Y, OR Z 100 110 120 130 140 150 EXPANDED OPERATING RANGE + 85 °C to + 150 °C Example: Assume the operating characteristics demand a temperature range from - 55 °C to + 125 °C. This requires a ± 35 °C below - 20 °C and a ± 40 °C above + 85 °C. The extreme being ± 40 °C means that the worst case addition to the specified TC limit of ± 0.05 ppm/°C times ± 40 °C or ± 2 ppm/°C. Therefore, a Z which is characterized by a base TC limit of ± 5 ppm/°C over the temperature range of - 20 °C to + 85 °C will exhibit a maximum temperature coefficient of ± 7 ppm/°C over the expanded portion of the temperature range of - 55 °C to 125 °C. PERFORMANCE TEST Life Short time overload Thermal shock Low temperature operation Resistance to bonding exposure Moisture resistance Solder mounting integrity Dielectric withstanding voltage Solderability Revision: 13-Jul-12 CONDITIONS OF TEST TEST RESULTS (TYPICAL TEST LOTS) MIL-STD-202, method 108, 1000 h rated power at + 85 °C ± 0.04 % MIL-PRF-55342, paragraph 4.8.6 ± 0.01 % MIL-STD-202, method 107, - 65 °C to + 150 °C ± 0.02 % MIL-PRF-55342, paragraph 4.8.5 ± 0.02 % MIL-STD-202, method 210 ± 0.02 % MIL-PRF-55342, paragraph 4.8.9 ± 0.08 % MIL-PRF-55342, paragraph 4.8.13, 3 kg for 30 s No evidence of mechanical damage MIL-STD-202, methods 301 and 105 ± 0.01 % MIL-STD-202, method 208 95 % coverage Document Number: 30162 3 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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