Document 461-1
RFID Transponder Coils
–
4312RV
The 4312RV series of transponder coils is designed for
RFID applications at 125 kHz. It is Coilcraft’s smallest
transponder coil developed specifically for the harshest
mechanical environments.
The coil is wound on a plastic base, providing great
durability and allowing this part to withstand physical
shock. With operating temperature range to 125°C, these
parts are ideal for use in a wide range of automotive
applications. The uniquely shaped termination provides
excellent board adhesion.
In addition to our standard models, Coilcraft can also
design transponder coils to operate at other frequencies.
To request free evaluation samples, contact Coilcraft
or visit www.coilcraft.com.
Inductance2
at125kHz
±2%(mH)
Read
Matching
distance3
(inches/cm)
Sensitivity4
(mV/µT)
capacitor5
(pF)
DCRmax6
(Ohms)
SRFtyp7
(kHz)
Partnumber1
Qmin2
4312RV-404XGL_
4312RV-105XGL_
4312RV-245XGL_
4312RV-495XGL_
4312RV-725XGL_
0.40
1.00
2.38
4.90
7.20
21
21
26
24
30
19.65/49,91
24.25/61,60
28.35/72,01
32.85/83,44
35.05/89,03
9.14
15.26
24.72
42.45
60.02
4050
1621
681
331
225
11.5
29
55
103
128
6340
4150
2470
1270
1465
4312RV-905XGL_
9.00
32
35.80/91,00
78.10
180
150
1200
6. DCR measured on micro-ohmmeter.
7. SRF measured using Agilent/HP 8753D network analyzer.
8. Ambient temperature range: 40°C to +125°C
9. Storage temperature range: Component: 40°C to +125°C
Packaging: 40°C to +80°C
10. 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.
1. When ordering, please specify packaging code:
4312RV-725XGLD
–
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 at 125 kHz. 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.
11. Electrical specifications at 25°C.
12. Temperature coefficient of inductance: +300 to +1100 ppm/°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
4. Sensitivity measured in accordance with Coilcraft application note
“Measuring Sensitivity of Transponder Coils.”
5. Matching capacitor value required for parallel resonant circuit operating
at 125 kHz.
Specifications subject to change without notice.
Please check our website for latest information.
Document461-1 Revised10/30/08
© Coilcraft, Inc. 2009
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