Document 324-1
RFID Transponder Coils – 4308RV
Coilcraft’s 4308RV antenna coils are high performance
devices intended for RFID applications at 125 kHz.
Theselowprofilepartshaveanextendedlengththatallows
longer read ranges. An encapsulated top ensures reliable
pickandplaceoperations.Coreconstructionandencapsu-
lation are rated for 125°C, which makes these transpon-
ders ideal for higher temperature applications.
The 4308RV transponders coils are available in 5% and
2%tolerances.Inadditiontothestandardmodelsshown,
Coilcraft can design coils to operate at other frequencies.
Coilcraft Designer’s Kit C383 contains four samples
of all 5% inductance tolerance parts. To order, contact
Coilcraft or visit http://order.coilcraft.com.
Inductance
at125kHz2
(mH)
Read
Matching DCR
SRF
typ8
Q
distance4 Sensitivity5 capacitor6 max7
Partnumber1
Tolerance3 min2 (in./cm)
(mV/µT)
(pF)
(Ohms) (kHz)
Colorcode
4308RV-374X_L_
4308RV-404X_L_
4308RV-704X_L_
4308RV-904X_L_
4308RV-115X_L_
0.37
0.40
0.70
0.90
1.08
5,2
5,2
5,2
5,2
5,2
26
26
20
22
24
22/55.9
23/58.4
25/63.5
26/66.0
30/76.2
9.82
10.38
13.96
16.06
17.78
4380
4050
2320
1800
1500
6.5
7.1
19
21
24
1800 OrangeVioletYellow
5000
6600
4800
4300
YellowBlackYellow
VioletBlackYellow
WhiteBlackYellow
BrownBrownGreen
4308RV-205X_L_
4308RV-245X_L_
4308RV-295X_L_
4308RV-335X_L_
4308RV-415X_L_
1.97
2.38
2.89
3.30
4.15
5,2
5,2
5,2
5,2
5,2
28
30
30
30
27
34/86.4
37/94.0
37/94.0
38/96.5
39/99.1
24.90
28.21
32.12
34.96
41.35
823
681
561
491
391
31
34
42
48
70
1750
1700
1900
RedBlackGreen
RedYellowGreen
Red WhiteGreen
1425 OrangeOrangeGreen
1620 YellowBrownGreen
4308RV-495X_L_
4308RV-685X_L_
4308RV-715X_L_
4308RV-725X_L_
4308RV-815X_L_
4.90
6.80
7.10
7.20
8.10
5,2
5,2
5,2
5,2
5,2
26
28
27
28
28
38/96.5
47.17
61.71
65.60
66.67
75.08
331
238
228
225
200
93
110
114
114
125
1150
1080
1050
965
YellowWhiteGreen
BlueGrayGreen
VioletBrownGreen
VioletRedGreen
GrayBrownGreen
41/104.1
42/106.7
40/101.6
42/106.7
965
4308RV-905X_L_
9.00
5,2
30
40/101.6
84.64
180
125
725
WhiteBlackGreen
1. When ordering, please specify tolerance and packaging codes:
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.
4308RV-905XJLD
Tolerance: G = 2% J = 5% (Table shows stock tolerances in bold.)
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.
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.
7. DCR measured on micro-ohmmeter.
8. SRF measured using Agilent/HP 8753D network analyzer.
9. Operating temperature range −40°C to +125°C.
10. Electrical specifications at 25°C.
2. Inductance and Q measured using Agilent/HP 4192A impedance
analyzer.
See Qualification Standards section for environmental and test data.
Specifications subject to change without notice.
Please check our website for latest information.
Document324-1 Revised01/24/05
© Coilcraft, Inc. 2006