This part is a kind of semiconductor called MA3810.

Function of this product has Power Switching Regulators.

Manufacturers : Shindengen Electric Mfg.Co.Ltd

Image and pinout :

Some of the text within the PDF file :

SHINDENGEN Power Switching Regulators MA3000 Series MA3810 OUTLINE DIMENSIONS Case : MA7 Unit : mm RATINGS ●Absolute Maximum Ratings Item Storage Temperature Operating Temperature Junction Temperature Peak Input Voltage Input Current Maximum Power Dissipation Dielectric Strength Insulation Resistance Max Voltage ④ to ⑦ Max Current ⑥ to ④ Max Current ⑤ to ④ Symbol Tstg Top Tj Vin Iin PD PD Vdis V④・⑦ I⑥・④ I⑤・④ Conditions Ratings -30～125 -20～125 150 850 2 4 3 14 2 100 6 100 500 Ratings MAX 100 11～22 MAX 1.0 MIN 1.7 MAX 2.3 MAX 3.5 Unit ℃ ℃ ℃ V A A W W kV MΩ V mA mA ②+,④-,Fig.1 is Measurement Circuit of Peak Input Voltage Vin and Collector Cutoff Current ICEX. DC ②+,④Pulse ②+,④- Pulse Width 150μs MAX, Duty1/2, Sawtooth Wave, Pea [ ... ]

MA3810 PDF Datasheet Download