This part is a kind of semiconductor called MP1605.

Function of this product has Tunnel Diodes.

Manufacturers : M-Pulse

Image and pinout :

Some of the text within the PDF file :

Part Number MP1101 MP1100 MP1102 MP1103 MP1104 MP1105 MP1201 MP1200 MP1202 MP1203 MP1204 MP1205 MP1301 MP1300 MP1302 MP1303 MP1304 MP1305 MP1451 MP1450 MP1452 MP1453 MP1454 MP1455 MP1601 MP1600 MP1602 MP1603 MP1604 MP1605 Case Style C2 C2 C2 E1 S1 P1 C2 C2 C2 E1 S1 P1 C2 C2 C2 E1 S1 P1 C2 C2 C2 E1 S1 P1 C2 C2 C2 E1 S1 P1 Ip range (µΑ) 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 100 - 200 100 - 200 100 - 200 100 - 200 100 - 200 100 - 200 200 - 300 200 - 300 200 - 300 200 - 300 200 - 300 200 - 300 300 - 450 300 - 450 300 - 450 300 - 450 300 - 450 300 - 450 450 - 600 450 - 600 450 - 600 450 - 600 450 - 600 450 - 600 Tunnel Diodes Iv max (µΑ) Vr (typ) Ir= 500µA (mV) 40 425 40 425 40 425 40 425 40 425 40 425 80 425 80 425 80 425 80 425 80 425 80 425 100 425 100 425 100 425 100 [ ... ]

MP1605 PDF Datasheet Download