This part is a kind of semiconductor called TT2140.

Function of this product has (TT2135 - TT2141) Small kVA 3 Phase Isolation Transformer.

Manufacturers : TEMCo

Image and pinout :

Some of the text within the PDF file :

Small kVA 3 Phase Isolation Transformer VA: Input Voltage: Out put Voltage: Taps: Insula tion Class: Impedan ce: 350, 500, 750, 1000, 1500 2000, 3000 415 Delta 600Y/347 See wiring diagram Class F 155º C 2.5 - 3.5% Phase: Frequency: BIL: Coils: Temp Rise: TT2135-TT2141 Three-Phase 50 Hz 4 kV Copper 100º C Open Enclosure Full 10 Year Warranty Feature Highlights 10 Year Warranty UL Listed CSA Approved - Copper windings - 1.5 to 2 week build time - Soldily fixed terminals with standard combination slotted Robertson head screw connections facilitate wiring. - Built with heat-proof insulation for compact size and long life. - Unique bobbin-wound coils for greater efficiency, superior heat evacuation, and compact structure. Optional Features NEMA 4/4x Encapsulation Other voltages/multiple t [ ... ]

TT2140 PDF Datasheet Download