3DC15CAP 3DCoil SMD CAP 17.5x16x4.30 mm (2.47mH-7.2mH)

Freq. (kHz) Lx (mH)Ly (mH)Lz (mH)Qx MinQy MinQz MinHeight (mm)Length (mm)Width (mm)
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 3DCoil CAP

The 3DC1515CAP series is an evolution of the 3DC1515 series, which combines the characteristics of the newest 3D coil from PREMO RFID and the advantages of a high quality plastic material used for the cap. This cap provides an additional mechanical protection to the coil with the thinnest walls, combined with a high performance in temperature. The cap allows an easier handling and placing of the part.

Keyless entry systems are a typical application for this coil, the Isotropy is often sought in RF antenna. In transponder applications, this feature has been achieved by the combination of 3 single coils oriented in the 3 space axis. The new 3D coil from PREMO RFID offers the possibility of mounting a single component instead of three, thus reducing cost, saving PCB space and increasing the circuit reliability. Sensitivity, low profile and small size are the key of this RFID innovative component. Best choice for keyless entry systems the three tri-rectangular windings ensure optimum field sensing regardless position. 


  • Size: 17.5 x 16.0 x 4.3mm
  • High drop test resistance (up to 500 times 1 m) due to a maximized pin area.
  • High stability in temperature (-40ºC to +85ºC).
  • Isotropic version available.
  • With cover cap or labelled.
  • Taped & Reeled.
  • Designed for 125KHz and 134KHz.   



  • Automotive passive keyless entry systems.
  • Automotive TPMS with wake up functions.
  • Access control.
  • Tracking devices.


The specification chart is a reference guide for the most common required values at working frequencies of 125 kHz. Any other inductance value at LF or tighter tolerances can be provided. Please contact our sales deparment for any inquiry. 


This product has datasheet available upon request.

L x,y,z (mH)Q x,y MinFrequency (kHz)Cres (pF)SRF x,y (kHz) MinSRF z (kHz) MinDCR x,y (Ω) MaxDCR z (Ω) MaxSensitivity x,y,z (mVpp/App/m) MinLength (mm)Width (mm)Height (mm)
3DC15CAP-0247J 2.47 22 125 656 400 900 75 75 65 16.0 17.5 4.3
3DC15CAP-0491J 4.91 25 125 330 250 550 100 140 70 16.0 17.5 4.3
3DC15CAP-0720J 7.20 20 125 225 250 550 120 230 95 16.0 17.5 4.3
3DC15CAP-S-0247J 2.47 xy / 3.3 z 22 125 656 400 900 75 75 65 16.0 17.5 4.3



Reel dimensions Tape dimensions PARTS/REEL
A B C D E W  P P0   P1  D  
330 50 13 30.4 24.4 24 20 4 2 4.2 0.3 600


All dimensions in mm.


3D 2D



Recommended reflow profile.


Reflow soldering, vapour-phase soldering. A maximum soldering temperature of 260ºC during 10 s should not be exceed for (see recommended soldering profile with maximum and minimum temperature-time).



The reflow condition recommended is according to the machine used by our company. Big differences will arise as a result of the type of machine, reflow conditions, method, etc used.

  1. Rated Inductance LR: Measured at frequency fL, with impedance analyser WK3260 with 3MHz installed.
  2. Q Factor Qmin: Measured at frequency fL, with impedance analyser WK3260 with 3MHz installed.
  3. Self-resonance frequency fmin Measured at frequency fL, with impedance analyser WK3260 with 3MHz installed.
  4. DC resistance Rmax: Measured at 20ºC ambient temperature, measuring current <IR.
  5. Sensitivity: Measured with Helmholtz coils 5 turns, 160mm ∅, + waveform generator Agilent 33120A + oscilloscope Agilent 54622A. Contact PREMO RFID for complete measurement specification.

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