UPDATE 6-Bain, 3Com deal stalled on Chinese stake

(Recasts at the top, adds that Bain never saw Tipping Point as strategic asset, para , closing share price)

By Jessica Hall

PHILADELPHIA, Feb 20 (Reuters) - Bain Capital Partners and China's Huawei Technologies Co Ltd [HWT.UL] have withdrawn their application for U.S. security approval of a $2.2 billion purchase of 3Com Corp (COMS.O: Quote, Profile, Research, Stock Buzz) after failing to satisfy the concerns of a U.S. government panel.

While the companies said on Wednesday they were still in discussions and the proposed transaction had not yet been terminated, a source familiar with the situation said the failure kills the deal in its current form.

Shares of 3Com fell 23 percent, or 86 cents, to $2.87 on Nasdaq as the possibility of the takeover proceeding seemed remote.

The concerns about the deal, through which Huawei -- China's top telecom equipment maker -- would have initially owned as much as 16.5 percent of 3Com, had been raised by the Committee on Foreign Investment in the United States (CFIUS). The panel, which is led by the U.S. Treasury Secretary, reviews corporate acquisitions involving foreign buyers.

In October, eight U.S. lawmakers had backed a bill suggesting that the planned buyout of 3Com "threatens the national security of the United States."

Although Congress has no direct role in CFIUS reviews, the panel is still smarting from a storm of criticism two years ago when it approved state-owned Dubai Ports World's acquisition of several U.S. port operations.

Congress was so enraged by the approval that it enacted a tougher law requiring CFIUS to spend more time vetting deals and to keep lawmakers better informed. Dubai Ports later relinquished the port operations it had purchased amid the political pressure.