Insulated Precision Wirewound Resistors Axial Leads In wirewound precision resistors, the series holds a leading position in professional applications whenever an excellent stability of the ohmic value and a correspondingly low temperature coefficient are required at the same time. The model resistors comply with the most stringent requirements of the CECC 4-21-6 specification. The series consists of 5 models covering the power range from 1 W to 1 W. Non-inductive versions can be supplied on request by specifying -NI. For higher power dissipations, the use of RH series resistors is recommended. FEATURES 1 W to 1 W at 25 C Approved according to CECC 4-21-6 According to MIL-R-26/5C and MIL-R-26/6C Excellent stability < ±.3 % after 1 h High power up to 1 W at 25 C Low ohmic values 1 m available Low temperature coefficient ± 5 ppm/ C Electrical insulation Climatic protection Termination = Pure matte tin or Sn/Ag/Cu according to the ohmic value Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 DIMENSIONS in millimeters INSULATED 25 min. A 25 min. Ø E Ø B Ø a ±.2 SERIES AND STYLE A MAX. R >.15 Ø B MAX. R.15 E ±.1 WEIGHT g 45 chamfer max..25 mm deep 4 4 L max. MOLDED 25 min. A 25 min. 1-2 a = 1 mm 3-6 - 1 a = 1.2 mm 1 7 2.5 -.6.27 2 1.2 4. 6.6.48 3 14 5.54 9.8 1.3 6 23.82 8.71 11.8 3.4 Ø E Ø B 1-2 1 46.78 1.32 18K.8 8.6 TECHNICAL SPECIFICATIONS VISHAY SFERNICE SERIES AND STYLE 1 2 3 6 1 Reference CECC 4-21-6 A B C D E Cross-Reference NF C83-21 RP8 RP7 RP4 RP5 RP6 Cross-Reference MIL-R-26/5C and MIL-R-26/6C RW81 RW8 RW79 RW74 RW78 Power Rating, Pr CECC 4-21-6 Power Extended Sfernice Power Ohmic Range in Relation to Tolerance Qualified Ohmic Value Range CECC 4-21-6 at 25 C, P 25 at 7 C, P 7 at 25 C, P 25 at 7 C, P 7 ± 5 % E24 ± 2 % E48 ± 1 % E96 ±.5 % E96 Note Undergoes European Quality Insurance System (CECC) Revision: 2-Apr-15 1 Document Number: 59 1 W.8 W 1 W.8 W.5 to.5 to.5 to.4 to 1.5 W 1.25 W 2 W 1.65 W.25 to.25 to.25 to.4 to 2.5 W 2 W 3 W 2.5 W.1 to.3 to.3 to.499 to - - 6 W 5 W.2 to.2 to.2 to.3 to ±.1 % E96 Please consult 1 to 47.2 to 1.78 k.1 to 3.57 k.1 to 12.1 k 1 W 8.2 W.6 to 15 k.6 to 15 k.6 to 15 k.3 to 15 k.1 to 4. Limiting Element Voltage, U max. AC/DC 5 V 12 V 2 V 3 V 72 V Critical Resistance Out of nominal ohmic range 17 8 W 51 1 W
STANDARD ELECTRICAL SPECIFICATIONS MODEL RESISTANCE RANGE RATED POWER P 25 C W TOLERANCE ± % 1.5 to 2K 1.1,.2,.5, 1, 2, 5 2.25 to 6.8K 2.1,.2,.5, 1, 2, 5 3.1 to 15K 3.1,.2,.5, 1, 2, 5 6.2 to 59K 6.1,.2,.5, 1, 2, 5 1.6 to 15K 1.1,.2,.5, 1, 2, 5 MECHANICAL SPECIFICATIONS Series and Style 1, 2 3, 6, 1 Encapsulant Resistive Element Ceramic Substrate Termination High temperature mold compound High temperature silicone coating CuNi or NiCr Alumina or steatite Pure matte tin or Sn/Ag/Cu ENVIRONMENTAL SPECIFICATIONS Temperature Range -55 C to 275 C Climatic Category (LCT/UCT/days) 55/2/56 PERFORMANCE TESTS Short Time Overload Load Life Dielectric w/s Voltage Rapid Change of Temperature Climatic Sequence Humidity (Steady State) Shock Vibration Load Life at Upper Category Temperature CONDITIONS 6.25 Pr Extended Sfernice Power or U = 2 U max. /5 s for 1, 2, 3 12 Pr Extended Sfernice Power or U = 2 U max. /5 s for 6, 1 9 /3 cycles 1 h Pr Extended Sfernice Power + 25 C U RMS = 5 V/6 s IEC 668-2-14 Test Na 5 cycles (3 at LCT/3 at UCT) -55 C / +2 C -55 C / +2 C/56 days IEC 668-2-3 Test Ca 95 % HR/4 C 56 days IEC 668-2-27 Test Ea 5 g s/half sine/ 3 times by direction (i.e. 18 shocks) IEC 668-2-6 Test Fc 1 Hz / 55 Hz 9 / 3 cycles 1 h Pr Extended Sfernice Power +2 C REQUIREMENTS ( R/R OR INDICATED PARAMETER) CECC 4-21-6 ± (.25 % +.5 ) ± (.5 % +.5 ) Insulation R 1 G No flashover or breakdown Leakage current < 1 μa ± (.25 % +.5 ) ± (.5 % +.5 ) ± (.5 % +.5 ) Insulation R 1 M ± (.25 % +.5 ) ± (.25 % +.5 ) ± (.5 % +.5 ) Insulation R 1 G Revision: 2-Apr-15 2 Document Number: 59
TEMPERATURE COEFFICIENT in the range -55 C to +2 C OHMIC RANGE REQUIREMENT CECC 4-21-6 < 1 ± 1 ppm/ C 1 to < 1 ± 5 ppm/ C 1 ± 25 ppm/ C STABILITY AND POWER RATING Stability changes slightly according to power rating and ambient temperature. This fact is especially important for users needing a life drift lower than the initial resistance tolerance. Typical drifts, after 2 h life test made under the 9 / 3 conditions and at an ambient temperature of 25 C, are: OHMIC RANGE 1 2 3 6 1 R %/R % Pr 1 W 2 W 3 W 5 W 1 W.3.5 Pr.5 W 1 W 1.5 W 2.5 W 5 W.15 POWER RATING 125 TEMPERATURE RISE 25 RATED POWER IN % 1 75 5 37 25 HOT SPOT TEMPERATURE IN C 2 15 1 5 1 2 3 6 1 5 1 15 2 25 275 3 35 AMBIENT TEMPERATURE IN C NON INDUCTIVE WINDING (NI) Non inductive (Ayrton Perry) winding available. Please consult. INDUCTANCE (Example) INDUCTANCE IN µh 1.4 1.3 1.2 1.1 1..9.8.7.6.5.4.3.2.1 3 1 W 3 NI 1 W.1 1 1 FREQUENCY IN MHz PACKAGING (see datasheet 532 and 533) Reel of 1 units for 1, 2, 3 Ammopack of 5 units for 1, 2, 3 Bag of 1 units for 1, 2 Blister of 2 units for 3 Box of 5 units for 6, 1 MARKING 1.5 3. 4.5 6. 7.5 1. RATED POWER IN W trademark, series, style, CECC style (if applicable) nominal resistance (in, k ), tolerance (in %), manufacturing date. Revision: 2-Apr-15 3 Document Number: 59
ORDERING INFORMATION 1 5R5 J R15 MODEL STYLE OHMIC VALUE TOLERANCE PACKAGING GLOBAL PART NUMBER INFORMATION R L P 6 1 5 R J B GLOBAL MODEL 1 2 3 6 1 SIZE OPTION OHMIC VALUE TOLERANCE PACKAGING SPECIAL N = non inductive winding The first four digits are significant figures and the last digit specifies the number of zeros to follow. R designates decimal point. 68R = 68 231 = 2.3 k 88R88 = 88.88... B =.1 % C =.2 % D =.5 % F = 1 % G = 2 % J = 5 % Standard packaging: Size 1 and 2: S14 = bag, 1 pieces size 3: B15 = bulk, 2 pieces size 6 and 1: B25 = box, 5 pieces As applicable Ex = MEX Revision: 2-Apr-15 4 Document Number: 59
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