Transphorm (TGAN) 424B3 Prospectus supplement

Exhibit 32.1

Certifications of Chief Executive Officer and Chief Financial Officer

Pursuant to

18 U.S.C. Section 1350,

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In accordance with 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, Mario Rivas, Chief Executive Officer of Transphorm, Inc. (the “registrant”), and Cameron McAulay, Chief Financial Officer of the registrant, each hereby certifies that, to the best of their knowledge:

1.The registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2020 to which this Certification is attached as Exhibit 32.1 (the “Report”), fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

Date:	November 10, 2020	By:	/s/ Mario Rivas
			Mario Rivas
			Chief Executive Officer
			(Principal Executive Officer)
			/s/ Cameron McAulay
			Cameron McAulay
			Chief Financial Officer
			(Principal Financial and Accounting Officer)