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 du-
rability and allowing this part to withstand physical shock.
With operating temperature range to 125°C, these parts
pass AEC-200 Grade 1 (-40°C to +125°C) qualification
and are ideal for use in a wide range of automotive ap-
plications. 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
2ꢀꢁmHꢂ
Read
Matching
distance3
ꢁinches/cmꢂ
Sensitivity4
ꢁmV/µTꢂ
capacitor5
ꢁpFꢂ
DCRmax6
ꢁOhmsꢂ
SRFtyp7
ꢁkHzꢂ
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
Terminations RoHS compliant gold over nickel over phos bronze.
Weight 210 – 240 mg
1. When ordering, please specify packaging code:
4312RV-725XGLD
Ambient temperature –40°C to +125°C
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (3000 parts per full reel).
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
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.
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
2. Inductance and Q measured using Agilent/HP 4192A impedance
analyzer at 125 kHz. For recommended test procedures, contact
Coilcraft.
Moisture Sensitivity Level ꢁMSLꢂ 1 (unlimited floor life at <30°C /
85% relative humidity)
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. 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.
6. DCR measured on micro-ohmmeter.
Temperature coefficient of inductance +300 to +1100 ppm/°C
Failures in Time ꢁFITꢂ / Mean Time Between Failures ꢁMTBFꢂ
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, 2.49 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
7. SRF measured using Agilent/HP 8753D network analyzer.
8. Electrical specifications at 25°C
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document 461-1 Revised 10/30/08
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. 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.
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