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
at 125 kHz
2
Part number
1
(mH)
Tolerance
3
4308RV-374X_L_
0.37
5,2
4308RV-404X_L_
0.40
5,2
4308RV-704X_L_
0.70
5,2
4308RV-904X_L_
0.90
5,2
4308RV-115X_L_
1.08
5,2
4308RV-205X_L_
1.97
5,2
4308RV-245X_L_
2.38
5,2
4308RV-295X_L_
2.89
5,2
4308RV-335X_L_
3.30
5,2
4308RV-415X_L_
4.15
5,2
4308RV-495X_L_
4.90
5,2
4308RV-685X_L_
6.80
5,2
4308RV-715X_L_
7.10
5,2
4308RV-725X_L_
7.20
5,2
4308RV-815X_L_
8.10
5,2
4308RV-905X_L_
9.00
5,2
Read
Matching DCR
Q
distance
4
Sensitivity
5
capacitor
6
max
7
min
2
(in. / cm)
(mV/µT)
(pF)
(Ohms)
26
22 / 55.9
9.82
4380
6.5
26
23 / 58.4
10.38
4050
7.1
20
25 / 63.5
13.96
2320
19
22
26 / 66.0
16.06
1800
21
24
30 / 76.2
17.78
1500
24
28
34 / 86.4
24.90
823
31
30
37 / 94.0
28.21
681
34
30
37 / 94.0
32.12
561
42
30
38 / 96.5
34.96
491
48
27
39 / 99.1
41.35
391
70
26
38 / 96.5
47.17
331
93
28
41 / 104.1
61.71
238
110
27
42 / 106.7
65.60
228
114
28
40 / 101.6
66.67
225
114
28
42 / 106.7
75.08
200
125
30
40 / 101.6
84.64
180
125
SRF
typ
8
(kHz)
Color code
1800 Orange Violet Yellow
5000
Yellow Black Yellow
6600
Violet Black Yellow
4800
White Black Yellow
4300 Brown Brown Green
1750
Red Black Green
1700
Red Yellow Green
1900
Red White Green
1425 Orange Orange Green
1620 Yellow Brown Green
1150
Yellow White Green
1080
Blue Gray Green
1050
Violet Brown Green
965
Violet Red Green
965
Gray Brown Green
725
White Black Green
1. When ordering, please specify
tolerance
and
packaging
codes:
4308RV-905XJLD
Tolerance: G
= 2%
J
= 5% (Table shows stock tolerances in bold.)
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.
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 on micro-ohmmeter.
8. SRF measured using Agilent/HP 8753D network analyzer.
9. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
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
Document 324-1
Revised 10/30/08
© Coilcraft Inc. 2013
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.
Document 324-2
RFID Transponder Coils – 4308RV
Typical Q vs Frequency
60
50
40
-404
Typical L vs Frequency
12
10
-815
Inductance (mH)
Q factor
-205
-415
-815
8
6
4
2
0
-205
-404
1
10
100
1000
10000
-415
30
20
10
0
1
10
100
1000
10000
Frequency (kHz)
Frequency (kHz)
0.108 max
2,74
0.040
ref
1,01
0.020
ref
0,51
0.450
max
11,43
0.433 ±0.005
10,99 ±0,127
0.079 ±0.004
2,00 ±0,10
0.124 max
3,15
0.040
0,89
Terminations
RoHS compliant
silver-palladium-platinum-glass frit
Weight
230 – 250 mg
Ambient temperature
–40°C to +125°C
Storage temperature
Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat
Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Temperature coefficient of inductance
+200 to +700 ppm/°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
One per billion hours / one billion hours, calculated per Telcordia SR-332
Packaging
3000 per 13″ reel Plastic tape: 24 mm wide,
0.3 mm thick, 8 mm pocket spacing, 2.7 mm pocket depth
PCB washing
Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
0.070
1,78
Recommended
Land Pattern
0.333
8,46
0.473
12,01
0.110
2,79
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
Document 324-2
Revised 10/30/08
© Coilcraft Inc. 2013
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.
ADI Reference Circuit
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