This part is a kind of semiconductor called 1N5664.

Function of this product has 1500 WATT UNIDIRECTIONAL TRANSIENT VOLTAGE SUPPESSOR.

Manufacturers : Microsemi

Image and pinout :

Some of the text within the PDF file :

6 Lake Street, Lawrence, MA 01841 1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803 Website: http://www.microsemi.com TECHNICAL DATA SHEET Gort Road Business Park, Ennis, Co. Clare, Ireland Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298 1500 WATT UNIDIRECTIONAL TRANSIENT VOLTAGE SUPPESSOR Qualified per MIL-PRF-19500/500 DEVICES * 1N5629 thru 1N5665 1N5629A thru 1N5665A * Commercial only DESCRIPTION LEVELS JAN JANTX JANTXV This popular Transient Voltage Suppressor (TVS) series for 1N5629 thru 1N5665A are JEDEC registered selections for unidirectional devices. All have the same high Peak Pulse Power rating of 1500 W with extremely fast response times. They are also available in military qualified selections as described in the Features section herein. They are most often used [ ... ]

1N5664 PDF Datasheet Download