Document 324-1
RFID Transponder Coils – 4308RV
Coilcraft’s 4308RV antenna coils are high performance de-
vices intended for RFID applications at 125 kHz.
These low profile parts have an extended length that al-
lows longer read ranges. An encapsulated top ensures
reliable pick and place operations. Core construction and
encapsulation are rated for 125°C, which makes these
transponders ideal for higher temperature applications.
For harsh environments, please consider the 4312RV or
5315TC, which were developed for tire pressure monitor-
ing systems.
The 4308RV transponders coils are available in 5% and
2% tolerances. In addition to the standard models shown,
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_
4308RV-205X_L_
4308RV-245X_L_
4308RV-295X_L_
4308RV-335X_L_
4308RV-415X_L_
4308RV-495X_L_
4308RV-685X_L_
4308RV-715X_L_
4308RV-725X_L_
4308RV-815X_L_
4308RV-905X_L_
0.37
0.40
0.70
0.90
1.08
1.97
2.38
2.89
3.30
4.15
4.90
6.80
7.10
7.20
8.10
9.00
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
5,2
26
26
20
22
24
28
30
30
30
27
26
28
27
28
28
30
22/55.9
23/58.4
25/63.5
26/66.0
30/76.2
34/86.4
37/94.0
37/94.0
38/96.5
39/99.1
38/96.5
41/104.1
42/106.7
40/101.6
42/106.7
40/101.6
9.82
10.38
13.96
16.06
17.78
24.90
28.21
32.12
34.96
41.35
47.17
61.71
65.60
66.67
75.08
84.64
4380
4050
2320
1800
1500
823
681
561
491
391
331
238
228
225
200
180
6.5
7.1
19
21
24
31
34
42
48
70
1800 OrangeVioletYellow
5000
6600
4800
YellowBlackYellow
VioletBlackYellow
WhiteBlackYellow
4300 BrownBrownGreen
1750
1700
1900
RedBlackGreen
RedYellowGreen
Red WhiteGreen
1425 OrangeOrangeGreen
1620 YellowBrownGreen
93
1150
1080
1050
965
965
725
YellowWhiteGreen
BlueGrayGreen
VioletBrownGreen
VioletRedGreen
GrayBrownGreen
WhiteBlackGreen
110
114
114
125
125
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). Quantities less than
full reel available: in tape (not machine ready) or with
leader and trailer ($25 charge).
7. DCR measured on micro-ohmmeter.
8. SRF measured using Agilent/HP 8753D network analyzer.
9. Electrical specifications at 25°C.
B = Less than full reel. In an effort to simplify our part
numbering system, Coilcraft is eliminating the need
for multiple packaging codes. When ordering, simply
change the last letter of your part number from B to D.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
2. Inductance and Q measured using Agilent/HP 4192A impedance
analyzer.
Document 324-1 Revised 12/02/21
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2021
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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