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New replacement timer board replaces both Onan # 300-0921 and 300-0922 in Onan transfer switches.

Two Year Warranty!  These are obsolete through Onan, but we have this suitable aftermarket replacement!

Features include improved circuit design, high quality components, and the capability to be rebuilt.  Backed by a 2 year warranty.

Exact replacement for these:

300-0921 ATS TIME DELAY (12V)
300-0922 ATS TIME DELAY (24V)

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  • Part #: 30009210922-A

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