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4308RV Series
RFID Transponder Coils

  • For RFID applications at 125kHz
  • Low profile and extended length allow longer read ranges and higher Q
  • Encapsulated top ensures reliable pick and place operations
  • Core and encapsulation rated for 125°C
  • For harsh environments like tire pressure monitoring systems, consider our 4312RV or 5315TC.
  • RoHS Compliant. 260°C compatible. Silver-palladium-platinum-glass frit terminations.
  • COTS Plus tin-silver-copper and tin-lead terminations available
  • Samples of all values are available in Coilcraft Designer's Kit C383

SPECIFICATIONS


Part number1
Click to get parts
Inductance
at 125 kHz2
(mH)
%
tol3
Q
min2
Read
distance4
(inch/cm)
Sensitivity5
(mV/µT)
Matching
capacitor6
(pF)
DCR
max7
(Ohms )
SRF
typ8
(kHz)
Color code
4308RV-374X_L_ 0.37 5,2 26 22 / 55.9 9.82 4380 6.5 1800 Orn Vio Yel
4308RV-404X_L_ 0.40 5,2 26 23 / 58.4 10.38 4050 7.1 5000 Yel Blk Yel
4308RV-704X_L_ 0.70 5,2 20 25 / 63.5 13.96 2320 19 6600 Vio Blk Yel
4308RV-904X_L_ 0.90 5,2 22 26 / 66.0 16.06 1800 21 4800 Wht Blk Yel
4308RV-115X_L_ 1.08 5,2 24 30 / 76.2 17.78 1500 24 4300 Brn Brn Grn
4308RV-205X_L_ 1.97 5,2 28 34 / 86.4 24.90 823 31 1750 Red Blk Grn
4308RV-245X_L_ 2.38 5,2 30 37 / 94.0 28.21 681 34 1700 Red Yel Grn
4308RV-295X_L_ 2.89 5,2 30 37 / 94.0 32.12 561 42 1900 Red Wht Grn
4308RV-335X_L_ 3.30 5,2 30 38 / 96.5 34.96 491 48 1425 Orn Orn Grn
4308RV-415X_L_ 4.15 5,2 27 39 / 99.1 41.35 391 70 1620 Yel Brn Grn
4308RV-495X_L_ 4.90 5,2 26 38 / 96.5 47.17 331 93 1150 Yel Wht Grn
4308RV-685X_L_ 6.80 5,2 28 41 / 104.1 61.71 238 110 1080 Blu Gry Grn
4308RV-715X_L_ 7.10 5,2 27 42 / 106.7 65.60 228 114 1050 Vio Brn Grn
4308RV-725X_L_ 7.20 5,2 28 40 / 101.6 66.67 225 114 965 Vio Red Grn
4308RV-815X_L_ 8.10 5,2 28 42 / 106.7 75.08 200 125 960 Gry Brn Grn
4308RV-905X_L_ 9.00 5,2 30 40 / 101.6 84.64 180 125 725 Wht Blk Grn
1 When ordering, please specify tolerance, termination and packaging codes: e.g. 4308RV-905XGLD
Tolerance: G = 2%, J = 5% (Table above shows stock tolerances in bold.)
Termination: L = RoHS compliant silver-palladium-platinum-glass frit
Special order, added cost: T = RoHS tin-silver-copper (95.5/4/0.5) or
S = non-RoHS tin-lead (63/37).
Packaging: D = 13" machine-ready reel
EIA-481 embossed plastic tape (3000 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.
3 Tolerances in bold are stocked for immediate shipment.
4 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.
5 Sensitivity measured in accordance with Coilcraft application note Measuring Sensitivity of Transponder Coils.
6 Matching capacitor value required for parallel resonant circuit operating at 125 kHz.
7 DCR measured at 25°C on a micro-ohmmeter. For other operating temperatures,use this DCR at Temperature calculator.
8 SRF measured using Agilent/HP 8753D network analyzer. Details
9 Ambient temperature range: −40°C to +125°C
10 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
11 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
12 Electrical specifications at 25°C.
13 Temperature coefficient of inductance: +200 to +700 ppm/°C.
Refer to Application Notes Transponder Coils in an RFID System and Measuring Sensitivity of Transponder Coils for additional information.
Refer to Soldering Coilcraft Components before soldering
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: April 10, 2017