This part is a kind of semiconductor called SSR-40VA-H.
Function of this product has SSR Series SOLID STATE RELAY.
Manufacturers : ANV
Image and pinout :
Some of the text within the PDF file :
10/100BASE-T SINGLE PORT SURFACE MOUNT MAGNETICS With Various Turns Ratios RoHS-5 peak reflow temperature rating 235°C RoHS-6 peak reflow temperature rating 245°C°° Meets IEEE 802.3 specification Compact footprint for use in the most space-restrictive applications Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C RoHS-5 4 Compliant Part Number H1100 H1101 H1102 H1121 H1183 H1199 HX1188 1 HX1198 1 H1302 RoHS-6 5 Turns Ratio Compliant Part Number TX RX H1100NL3a 2:1 1:1 H1101NL3a 1.25:1 1:1 H1102NL3a 1:1 1:1 H1121NL3c 1:1.414 1:1 H1183NL3a 1:1 1:1 H1199NL3a 1:1 1:1 HX1188NL1, 3a 1:1 1:1 HX1198 NL1, 3a 1:1 1:1 H1302NL3a 1:1 1:1 Insertion Loss 100kHz–100MHz (db MAX) -1.1 -1.1 -1.1 -1.1 -1.0 -0.9 -1.0 -1.0 -1.1 Return Loss (dB TYP) 30MHz -20 -20 -20 -18 -18 -18 -20 [ ... ]