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Material for Transponder coils
Material for Transponder coils We offer cores for transponder coils. They are suited for automotive electronics applications such as immobilizer systems, keyless entry, passive entry / passive start (PEPS), and tire pressure monitoring systems (TPMS).
Material for Transponder coils Material for Transponder coils

Aluminum oxide 96% , Ni-Zn Ferrite (our material H, K, or G).

Specifications (Aluminum oxide 96% )
Material Alumina
(Aluminum Oxide)
Product code number A-6
Chemical analysis Al2O3 96%
Color White
Apparent specific gravity [Kg/m3] 3.7x103
Water absorption [%] <0.01
Safety service temperature [℃] 1,400
Flexural strength [MPa] >320
Compressive strength [MPa] >1,070
Thermal expansion
20~ 500℃ 7.2x10-6
20~ 800℃ 7.8x10-6
20~1000℃ 8.1x10-6
Thermal conductivity [W/(m・K)] 20
Dielectric strength [kV/mm] 10
Volume resistivity [ohm-cm] 25℃ >1014
300℃ >1011
500℃ >108
Dielectric constant (1MHz) 9.3
Loss factor (1MHz) 0.0001

Specifications (Ni-Zn Ferrite (our material H, K, or G) )
item unit Material Type
Initial Permeability
µi (f=10kHz)
- 80 350 800
Residual Flux
Density Br
mT 240 250 130
Coercive Force
A/m 215 80 40
Saturation Flux Density
Bm ( Hm[A/m] )
mT 320
Relative Loss Factor
tan ð/µi
×10-6 400
Curie Temperature
>200 >180 >160
Electrical Resistivity
ohm-cm 108 108 108

Electrode material
Ag-Pd, or Mo/Mn

Plating material
Sn, or Au. Concerning the film thickness of plating, your requirement is considered.

Dimension (The same with Aluminum oxide and Ferrite)
Length (L) Width (W) Height (H)
within 11mm within 10mm within 5mm
Our standard dimension is as below.
Length(L) = 11mm, Width(W) = 2mm, Height(H) = 2mm

Particular mention
Concerning our transpondor coils made by our ferrite, it is available without metalizing or plating.

Typical use
Various kinds of electronic equipment. For example, antenna coil (Automobile electronic components, Tire air pressure measuring system, Immobilizer, etc.)


Sales and Business Control Group
Phone +81-561-48-5012, FAX +81-561-48-5058


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