? coilcraft, inc. 2005 rfid transponder coils C 4308tc document 223-1 specifications subject to change without notice. document 223-1 revised 11/04/03 coilcraft?s family of antenna coils are rugged, high perfor- mance devices intended for rfid applications at 125 khz. these low profile parts have an extended length that allows longer read ranges and higher sensitivity. the coil is constructed of ferrite laminated onto a ceramic base, which makes it more rugged and impact resistant than all-ferrite constructions. an encapsulated top ensures reliable pick and place operations. in addition to the standard models shown, coilcraft can design transponder coils designed to operate at other frequencies. inductance 1 read matching @125 khz distance 3 capacitor 4 dcr max 5 srf min 6 part number 1 5% (mh) q min 2 (inches/cm) (pf) (ohms) ( khz) color code 4308tc-404xjb_ 0.40 15 20 / 52 4000 7.4 4500 yellow black yellow 4308tc-904xjb_ 0.90 15 26 / 67 1800 22 4000 white black yellow 4308tc-115xjb_ 1.08 15 27 / 70 1500 25 4000 brown brown green 4308tc-205xjb_ 1.97 17 31 / 80 820 34 2400 red b lack green 4308tc-245xjb_ 2.38 17 32 / 83 680 39 2200 red yellow green 4308tc-335xjb_ 3.30 17 35 / 90 490 51 1800 orange orange green 4308tc-415xjb_ 4.15 17 35 / 90 390 74 1700 yellow brown green 4308tc-495xjb_ 4.90 17 36 / 91 330 96 1300 yellow white green 4308tc-685xjb_ 6.80 17 37 / 95 240 112 1000 blue gray green 4308tc-715xjb_ 7.10 17 38 / 97 220 115 1000 violet brown green 4308tc-815xjb_ 8.10 17 37 / 95 200 123 960 gray brown green 1. when ordering, please specify packaging code: 4308tc-815xjb d packaging: d =13 machine-ready reel. eia-481 embossed plastic tape (3000 parts per full reel). b = less than full reel. in tape, but not machine ready. to have a leader and trailer added ($25 charge), use code letter d instead. 2. inductance and q measured using agilent/hp 4192a impedance analyzer. for recommended test procedures, contact coilcraft. 3. read distance measured using the keeloq ? transponder evaluation kit part number dm303005 from microchip. distance was recorded as the voltage across the resonant circuit dropped below 10 mv. 4. matching capacitor value required for parallel resonant circuit operating at 125 khz. 5. dcr measured on micro-ohmmeter. 6. srf measured using agilent/hp 8753d network analyzer. 7. operating temperature range ? 40c to +85c. 8. electrical specifications at 25c. see qualification standards section for environmental and test data. note: this product has been replaced by the 4308rv series. the new series is footprint compatible and offers better read distances and an expanded temperature range.
? coilcraft, inc. 2005 document 223-2 specifications subject to change without notice. document 223-2 revised 11/14/03 rfid transponder coils C 4308tc dimensions t ypical l vs frequency 0.110 2,79 0.333 8,46 0.473 12,01 0.070 1,78 recommended land pattern 0.108 0.004 2,74 0,10 0.04 1,01 ref 0.02 0,51 ref 0.450 11,43 max max 0.433 0.005 10,99 0,127 0.124 3,15 0.079 0.004 2,00 0,10 0.04 0,89 terminations: silver-palladium-platinum tape and reel: 3000/13 reel 24 mm tape width for packaging data see tape and reel specifications section.
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