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.
Part number
1
4312RV-404XGL_
4312RV-105XGL_
4312RV-245XGL_
4312RV-495XGL_
4312RV-725XGL_
4312RV-905XGL_
Inductance
2
at 125 kHz
±2% (mH)
0.40
1.00
2.38
4.90
7.20
9.00
Q min
2
21
21
26
24
30
32
Read
distance
3
(inches/cm)
19.65 / 49,91
24.25 / 61,60
28.35 / 72,01
32.85 / 83,44
35.05 / 89,03
35.80 / 91,00
Sensitivity
4
(mV/µT)
9.14
15.26
24.72
42.45
60.02
78.10
Matching
capacitor
5
(pF)
4050
1621
681
331
225
180
DCR max
6
(Ohms)
11.5
29
55
103
128
150
SRF typ
7
(kHz)
6340
4150
2470
1270
1465
1200
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.
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.
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.
Terminations
RoHS compliant
gold over nickel over phos bronze
.
Weight
210 – 240 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
+300 to +1100 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, 2.49 mm pocket depth
PCB washing
Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
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 461-1
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 461-2
RFID Transponder Coils – 4312RV
Typical L vs Frequency
10
125 kHz
Dimensions
0.448
max
11,38
0.136
max
3,45
9
8
9.0 mH
Inductance (mH)
7
6
5
4
3
2
1
0
0.01
XXX
7.2 mH
4.9 mH
0.092
max
2,34
0.030
0.347
0,76
8,81
Note: Unless otherwise indicated, all part dimensions ±0.002/0,05
0.45
11,43
0.32
8,1
2.38 mH
1.0 mH
0.40 mH
0.1
1
10
0.065
1,65
0.15
3,8
Frequency (MHz)
Recommended
Land Pattern
inches
mm
Dimensions are in
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 461-2
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.
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