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This product has been replaced by the 4308RV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 perfor-
mance 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.
Inductance
1
@125 kHz
±5% (mH)
Read
distance
3
(inches/cm)
Matching
capacitor
4
(pF)
Part
Number
1
Q
min
2
DCR max
5
(Ohms)
SRF min
6
(kHz)
Color code
4308TC-404XJL_
4308TC-904XJL_
4308TC-115XJL_
4308TC-205XJL_
4308TC-245XJL_
4308TC-335XJL_
4308TC-415XJL_
4308TC-495XJL_
4308TC-685XJL_
4308TC-715XJL_
4308TC-815XJL_
0.40
0.90
1.08
1.97
2.38
3.30
4.15
4.90
6.80
7.10
8.10
15
15
15
17
17
17
17
17
17
17
17
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
Revised 02/09/05
© Coilcraft, Inc. 2006
Document 223-2
RFID Transponder Coils – 4308TC
Dimensions
0.108 ±0.004
2,74 ±0,10
0.04
ref
1,01
Typical L vs Frequency
0.02
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
0.04
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
Revised 02/09/05
© Coilcraft, Inc. 2006
