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The 0603CS-5N1 from Coilcraft is a RF Inductor with Inductance 0.0051 to 0.0051 uH, DC Resistance 0.14 Ohms, DC Current 0.7 mA, Self Resonant Frequency 5700 MHz. More details for 0603CS-5N1 can be seen below.
100, 120 and 160 nH Chip Inductors for NFC Circuits
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