Document 223-1 RFID Transponder Coils – 4308TC NOTE: This product has been replaced by the 4308RV series.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’s family of antenna coils are rugged, high performance 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. Part Number1 4308TC-404XJL_ 4308TC-904XJL_ 4308TC-115XJL_ 4308TC-205XJL_ 4308TC-245XJL_ 4308TC-335XJL_ 4308TC-415XJL_ 4308TC-495XJL_ 4308TC-685XJL_ 4308TC-715XJL_ 4308TC-815XJL_ Inductance1 @125 kHz ±5% (mH) 0.40 0.90 1.08 1.97 2.38 3.30 4.15 4.90 6.80 7.10 8.10 Q min2 15 15 15 17 17 17 17 17 17 17 17 Read distance3 (inches/cm) Matching capacitor4 (pF) DCR max5 (Ohms) SRF min6 (kHz) Color code 20/52 26/67 27/70 31/80 32/83 35/90 35/90 36/91 37/95 38/97 37/95 4000 1800 1500 820 680 490 390 330 240 220 200 7.4 22 25 34 39 51 74 96 112 115 123 4500 4000 4000 2400 2200 1800 1700 1300 1000 1000 960 Yellow Black Yellow White Black Yellow Brown Brown Green Red Black Green Red Yellow Green Orange Orange Green Yellow Brown Green Yellow White Green Blue Gray Green Violet Brown Green Gray Brown Green 1. When ordering, please specify packaging code: 4308TC-815XJLD 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 −40°C to +85°C. 8. Electrical specifications at 25°C. See Qualification Standards section for environmental and test data. Specifications subject to change without notice. Please check our website for latest information. Document 223-1 © Coilcraft, Inc. 2006 Revised 02/09/05 Document 223-2 RFID Transponder Coils – 4308TC Dimensions Typical L vs Frequency 0.04 ref 1,01 0.108 ±0.004 2,74 ±0,10 0.02 ref 0,51 0.450 max 11,43 0.433 ±0.005 10,99 ±0,127 0.124 max 3,15 0.079 ±0.004 2,00 ±0,10 0.04 0,89 0.070 1,78 0.110 2,79 Recommended Land Pattern 0.333 8,46 0.473 12,01 Terminations: Silver-palladium-platinum-glass frit Tape and reel: 3000/13″ reel 24 mm tape width For packaging data see Tape and Reel Specifications section. Specifications subject to change without notice. Please check our website for latest information. Document 223-2 © Coilcraft, Inc. 2006 Revised 02/09/05