ECM Chip Transponder Inductors
ECM Electronics Limited, Penmaen House, Ashington, West Sussex, RH20 3JR, UK
Tel: +44(0)1903 892810: Fax: +44(0)1903 892738. Email: ecm@ecmelectronics.co.uk
Although we have attempted to accurately reflect the products we market. ECM reserve the right without prior notice to
discontinue any product or make design changes we believe necessary.
Issue 1
High Shock Resistance
Drop Tested 5 X4m + 200 X1.2m
125kHz Transponder Application
LCP Resin Body
Ferrite Core
Temp. Range –40 to 85 oC
Typical Reel Size 5000pcs
SDTR Series
COMPONENT OUTLINE
The SDTR series of surface mountable wound inductors is the very first of its type specifically
designed for transponder applications in high shock and vibration environments.
DIMENSIONS (mm)
ECM Type Inductance Range A B C D E F
SDTR1103 290uH~16.2mH 11.0 2.9 2.5 3.2 9.3 1.0
ECM Chip Transponder Inductors
ECM Electronics Limited, Penmaen House, Ashington, West Sussex, RH20 3JR, UK
Tel: +44(0)1903 892810: Fax: +44(0)1903 892738. Email: ecm@ecmelectronics.co.uk
Although we have attempted to accurately reflect the products we market. ECM reserve the right without prior notice to
discontinue any product or make design changes we believe necessary.
Issue 1
ECM
Part
L
(mH)
Tol
%
C
(pF)
Q Min.
(**kHz)
SRF
Min.
(kHz)
Reading
Distance
(cm)RD
SDTR1103T-291 0.29 @125 kHz K 5600 20 1000 29
SDTR1103T-341 0.34 @125 kHz K4700 20 1000 34
SDTR1103T-411 0.41 @125 kHz K 3900 20 1000 38
SDTR1103T-491 0.49 @125 kHz K3300 20 1000 39
SDTR1103T-601 0.60 @125 kHz K 2700 20 1000 41
SDTR1103T-731 0.73 @125 kHz J2200 20 1000 42
SDTR1103T-901 0.90 @125 kHz J 1800 20 1000 43
SDTR1103T-102 1.08 @125 kHz J1500 20 1000 45
SDTR1103T-162 1.62 @125 kHz J 1000 20 600 52
SDTR1103T-192 1.97 @125 kHz J820 20 400 59
SDTR1103T-242 2.38 @125 kHz J 680 22 400 65
SDTR1103T-292 2.89 @125 kHz J560 25 400 68
SDTR1103T-342 3.44 @125 kHz J 470 25 400 71
SDTR1103T-402 4.05 @125 kHz J400 25 350 74
SDTR1103T-492 4.91 @125 kHz J 330 25 350 75
SDTR1103T-602 6.00 @125 kHz J270 25 350 75
SDTR1103T-722 7.20 @125 kHz J 225 25 330 70
SDTR1103T-742 7.36 @125 kHz J220 25 300 63
SDTR1103T-902 9.00 @125 kHz J 180 22 300 61
SDTR1103T-113 10.8 @125 kHz J150 20 300 54
SDTR1103T-143 13.5 @125 kHz J 120 20 250 47
SDTR1103T-163 16.2 @125 kHz J100 20 250 45
TOLERANCES J=5%; K= 10%.
** = Operating and Test Frequency as specified in ‘L’ column
C = Capacitor for tuning circuits (125kHz) NB - the parallel input Cap. of the IC
must also be taken into account
RD = 20mVp/p in a tuned circuit – Emitter ∅ 194mm, L @ 734 µH, Vrms 73.3mV
