For sale are new 250A, 300V high-power diodes, Mitsubishi model SR250L-6S ("S" = standard polarity version - cathode at bottom heat sink side). These are part of our surplus Web Site inventory; we are selling them at discount on Ebay due to overstock! To view a full specification sheet for the similar 170A version (PDF), click here (we do not have a datasheet available for this exact 250A model).

For price comparison, similarly rated diodes such as the 400V 250A R6010425XXYA normally sell for $60 each at distributors such as galco.com! (this diode is no longer manufactured, so pricing is unavailable)

See our other auctions for more electronic surplus items from Tesla Systems Research Inc.

Please with any questions.




We strive to make your buying experience positive!

We also purchase items on Ebay, so we understand what it's like to be an Ebay buyer. We treat our customers how we want to be treated. Our customer satisfaction promise:



  • We describe items accurately. If we notice an aesthetic or functional problem, this will be clearly explained and/or photographed.

  • We ship items promptly, usually within 3 business days of payment. If for any reason there is a delay we will email the customer.

  • All items are professionally and securely packaged beyond normal packaging standards.

  • We provide prompt and friendly customer service. In most cases you can expect an email or telephone reply within 1 business day (M-F).
If you have any questions or concerns about your purchase, please contact us!



Policies and Terms of Sale


By placing a bid or purchasing any of our items, you agree to our full auction policies. A summary of these policies is provided below:


We thank you for your interest in our auction, and welcome your email with any questions about our items.


Tesla Systems Research Inc.
120 Village Square Box #5
Orinda, CA 94563
925-253-2485