This part is a kind of semiconductor called 7109.

Function of this product has Common Mode EMI Inductors.

Manufacturers : JW Miller

Image and pinout :

Some of the text within the PDF file :

Common Mode EMI Inductors Special Features 7100 Series L (mH) Part ±15% I, DC Number @ 1KHz (A) 7101 0.6 1.0 7102 1.0 1.0 7103 2.0 1.0 7104 3.0 1.0 7105 5.0 1.0 7106 0.6 2.0 7107 1.0 2.0 7108 2.0 2.0 7109 3.0 2.0 7110 0.6 3.0 7111 1.0 3.0 7112 1.0 2.0 7113 2.0 2.0 7114 3.0 2.0 7115 5.0 2.0 7116 8.0 2.0 7117 1.0 5.0 7118 2.0 5.0 7119 5.0 4.0 7120 8.0 4.0 7121 50 2.0 7122 30 4.0 7123 11 5.0 7124 3.0 10 DCR (Ω) Max. 0.040 0.060 0.070 0.100 0.125 0.030 0.040 0.060 0.075 0.020 0.030 0.050 0.075 0.085 0.110 0.200 0.035 0.040 0.046 0.060 0.200 0.130 0.072 0.020 Dim. Dim. A B Max. Max. 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.600 0.450 0.800 0.550 0.800 0.550 0.800 0.550 0.800 0.550 0.800 0.550 0.800 0.550 1.20 0. [ ... ]

7109 PDF Datasheet Download