Transponder Inductor. TR4308I Datasheet

TR4308I Inductor. Datasheet pdf. Equivalent

TR4308I Datasheet
Recommendation TR4308I Datasheet
Part TR4308I
Description RFID Transponder Inductor
Feature TR4308I;  Product Introduction Transponder Coils (TR4308I) is The Key of Radio Frequency Identification (RFI.
Manufacture Token
Datasheet
Download TR4308I Datasheet




Token TR4308I
Product Introduction
Transponder Coils (TR4308I) is The Key of
Radio Frequency Identification (RFID) System.
Features :
High Q value.
Low profile with an extended length.
Applications :
Car remote control key.
Token (TR4308I) RFID coil series is specified for RFID
applications for the best performing designed at 125 kHz. The
(TR4308I) covers a wide range of electrical performances and
offers better sensitivity, greater read distance and higher SRF than
other coils its size.
The TR4308I's length and cross section area are optimized for best
sensitivity in the coil axis. The coil is wound on a plastic base,
providing great durability and allowing this part to withstand harsh
mechanical shock. With operating temperature range to 125, these coils are ideal for a wide range of
applications.
Radio Frequency Identification (RFID) is the system of using radio signals to send information
identifying a particular situation or item. Token (TR4308I) is suited for wireless data transmission in
low frequency RFID products, such as immobilizers, TPMS, keyless entry. Other industrial
applications include access control and tracking devices.
In addition to our standard models, Token can design RFID coils to operate at other frequencies.
Customized inductance values are available on request. Contact us with your specific needs. For more
information, please link to Token official website RF Inductors.
http://www.token.com.tw
rfq@token.com.tw
Taiwan Factory: +886 2 29810109
China Factory: +86 755 26055363
Page: 1/5



Token TR4308I
Configurations & Dimensions
Configurations & Dimensions (Unit: mm) (TR4308I)
Type
ABCDE FGH
TR4308I
11.43
3.15
2.74
1.01
0.51
2.79
1.78
8.46
RFID (TR4308I) Dimensions
Note: Design as Customer's Requested Specifications.
TR4308I Characteristics
Electrical Characteristics (TR4308I)
Part Number
Inductance
(mH)
Q
(min)
TR4308I - 401J
TR4308I - 901J
TR4308I - 112J
TR4308I - 202J
TR4308I - 242J
TR4308I - 332J
TR4308I - 412J
TR4308I - 492J
TR4308I - 682J
TR4308I - 712J
TR4308I - 812J
0.40 15
0.90 15
1.08 15
1.97 17
2.38 17
3.30 17
4.15 17
4.90 17
6.80 17
7.10 17
8.10 17
Note: Test Freq.: 125 KHz / 0.25V.Operating Temp.: -40+85.
Test Freq.
(KHz)
125
125
125
125
125
125
125
125
125
125
125
SRF
(KHz)(min)
4500
4000
4000
2400
2200
1800
1700
1300
1000
1000
960
DCR
(Ω)(max)
7.4
22
25
34
39
51
74
96
112
115
123
http://www.token.com.tw
rfq@token.com.tw
Taiwan Factory: +886 2 29810109
China Factory: +86 755 26055363
Page: 2/5



Token TR4308I
RFID Transponder Applications
RFID, Radio Frequency Identification System and Applications
RFID, Radio Frequency Identification, is the system of using radio signals to send information
identifying a particular item. The most common application of RFID is to track and locate any subject
including material, or moving item.
The RFID coil is part of the coupling device and acts as the transmitting antenna. The main
specifications of the RFID coils are sensitivity and read distance; however, the inductance of the RFID
coil directly influences the sensitivity and the read distance. Generally, a higher inductance provides
greater sensitivity resulting in a longer read distance.
There are two major components in an RFID system:
Tag:
The transponder programmed with unique information. The tag consists of an integrated circuit and a
coupling device. The integrated circuit stores specific data unique to that tag.
Reader:
The interrogator includes a decoder to interpret data. The coupling device interfaces with the reader.
The manufacturer of the tag usually specifies the inductance of the coil to be used. The read distance is
defined as the maximum distance from the reader that the transponder responds to the reader's
magnetic field. The reader produces a magnetic field that triggers the tag. When the reader receives the
transmitted data, it interprets the data and takes appropriate action as shown in figure 1.
Figure 2. LC Circuit
Figure 1. RFID System
When the transponder enters the field produced by the reader, the coil produces a voltage inside the tag.
In an active transponder, the voltage is used to wake the tag and use its internal battery. In a passive
transponder, this voltage can be used to power the tag. Active transponders generally have longer read
distances, shorter operational life and are larger and more costly to manufacture. Passive transponders
are generally smaller, have a longer life and are less expensive to manufacture.
For optimum performance, the RFID coil is used in a parallel LC circuit as shown in figure 2. Adding
a capacitor to the circuit maximizes the read distance. The LC circuit is designed to resonate at the
operating frequency of the reader. To calculate the value of the capacitor, use the following
equation: Capacitance (C) = 1 / (Inductance L × (2π × Frequency ƒ)) 2
http://www.token.com.tw
rfq@token.com.tw
Taiwan Factory: +886 2 29810109
China Factory: +86 755 26055363
Page: 3/5







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