This part is a kind of semiconductor called 3RT2916-1BB00.
Function of this product has 3RT2916-1BB00.
Manufacturers : Siemens
Image and pinout :

Some of the text within the PDF file :
Product data sheet 3RT2916-1BB00 SURGE SUPPRESSOR, VARISTOR, AC 24...48V, DC 24...70V, F. CONT. RELAYS A. MOTOR CONT. SZ S00, General technical data: Product brand name Product designation Size of the contactor Design of the surge suppressor Ambient temperature • during storage • during the operating phase °C °C -40 … 80 -25 … 60 SIRIUS surge suppressor S00 with varistor Control circuit: Type of voltage / of the controlled supply voltage Control supply voltage frequency • 1 / rated value • 2 / rated value Control supply voltage / 1 • for DC • initial rated value • final rated value • at 50 Hz / for AC • initial rated value • final rated value V V 24 48 V V 24 70 Hz Hz 50 60 AC/DC 3RT2916-1BB00 Page 1/ 3 10/15/2010 subject to modifications © Copyright Siemen [ ... ]
3RT2916-1BB00 PDF Datasheet Download
