PSF 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 * Compliant to RoHS directive 2002/95/EC 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 RESISTANCE RANGE ENCAPSULATION 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 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: (1) DSCC DRAWING NUMBER VISHAY DALE MODEL POWER RATING P85 C W RESISTANCE RANGE TOLERANCE % TEMPERATURE COEFFICIENT ppm/C MAX. WORKING VOLTAGE (1) VDC 02001 PSF2012..1 0.125 15 to 100 K 0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1 5, 10 200 This drawing can be reviewed at: www.dscc.dla.mil/Programs/MilSpec/listDwgs.asp?DocType=DSCCdwg. Continuous working voltage shall be P x R or maximum working voltage, whichever is less. 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) * Pb containing terminations are not RoHS compliant, exemptions may apply www.vishay.com 320 For technical questions, contact: ff2aresistors@vishay.com Document Number: 30162 Revision: 14-Apr-10 PSF Metal Film Resistors, High Precision, High Stability, Surface Mount 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 PACKAGING CODE TAPE WIDTH DIAMETER PIECES/REEL LEAD (Pb)-FREE LEAD (Pb)-BEARING PSF2012 12 mm/embossed plastic 330 mm/13" 2000 EA TA PSF4527 24 mm/embossed plastic 330 mm/13" 1200 EA TA Note * Embossed carrier tape per EIA-481. Document Number: 30162 Revision: 14-Apr-10 For technical questions, contact: ff2aresistors@vishay.com www.vishay.com 321 PSF Metal Film Resistors, High Precision, High Stability, Surface Mount 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 www.vishay.com 322 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 For technical questions, contact: ff2aresistors@vishay.com Document Number: 30162 Revision: 14-Apr-10 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. 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No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. Material Category Policy Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (EEE) - recast, unless otherwise specified as non-compliant. Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU. Revision: 12-Mar-12 1 Document Number: 91000