This part is a kind of semiconductor called BY126MGP.

Function of this product has MINIATURE GLASS PASSIVATED JUNCTION PLASTIC RECTIFIER.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

BY 4 ... BY 16 High Voltage Si-Rectifiers Si-Hochspannungs-Gleichrichter 6.3 Nominal current – Nennstrom Repetitive peak reverse voltage Periodische Spitzensperrspannung Plastic case Kunststoffgehäuse Weight approx. – Gewicht ca. Plastic material has UL classification 94V-0 Gehäusematerial UL94V-0 klassifiziert Standard packaging: bulk Standard Lieferform ungegurtet 1 A...0.3A 4000…16000 V Ø 6.3 x 21 [mm] 1.9 g ±0.5 65 Ø 1.2 ±0.05 Dimensions / Maße in mm Maximum ratings and Characteristics Type Typ Rep. peak reverse volt. Surge peak reverse volt. Period. Spitzensperrspg. Stoßspitzensperrspg. VRRM [V] VRSM [V] 21 Grenz- und Kennwerte Max. forward current Dauergrenzstrom IFAV [A] 1) Forward volt. Durchlaßspg VF [V] 2) BY 4 BY 6 BY 8 BY 12 BY 16 4000 6000 8000 12000 [ ... ]

BY126MGP PDF Datasheet Download