UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): December 30, 2005

ADVANCED POWER TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware	001-16047	93-0875072
(State or other jurisdiction of incorporation or organization)	(Commission File No.)	(I.R.S. Employer Identification No.)

405 SW Columbia Street, Bend, Oregon 97702
(Address of principal executive offices) (ZIP Code)

Registrant’s telephone number, including area code:

(541) 382-8028

Check the appropriate box below if the Form 8- filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (See General Instruction A.2):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01 Entry into a Material Definitive Agreement

On December 30, 2005, Advanced Power Technology, Inc. entered into a supply agreement with Siltronic Corporation in which Siltronic Corporation will supply silicon wafers to Advanced Power Technology, Inc. according to the terms and conditions of the contract. The contract expires on December 31, 2006 at which time it may be renegotiated. A copy of the supply agreement is attached as Exhibit 10.40 of this report.

Item 9.01 Financial Statements and Exhibits

Exhibit no.		description

10.40		Supply Contract between Siltronic Corporation and Advanced Power Technology, Inc. dated December 30, 2005.

SIGNATURES

Pursuant to the requirements of Section 13 of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned; thereunto duly authorized this 6th day of January, 2006.

	ADVANCED POWER TECHNOLOGY, INC.

	BY:	/s/ GREG M. HAUGEN

		Greg M. Haugen
		Vice President, Finance and Administration,
		Chief Financial Officer and Secretary
		(Principal Financial Officer)

Exhibit no.

description

Exhibit
no.

ADVANCED POWER TECHNOLOGY INC 8-K