WASHINGTON (BLOOMBERG) - The Trump administration held off on blacklisting Huawei Technologies Co out of concern the move could disrupt trade negotiations with China and only took action after the last round of talks hit an impasse, according to people familiar with the matter.

Plans to target the Chinese telecommunications equipment maker over security concerns had been on the table for months and included possibly subjecting Huawei to economic sanctions, according to the people, who asked not to be identified discussing internal deliberations.

But the decision to curtail the Shenzhen-based company's access to American suppliers unfolded quickly once trade talks broke down, setting off a scramble to implement the measures, the people said.

The Commerce Department action last week requires American suppliers of Huawei, a crown jewel of Chinese manufacturing, to seek US government permission to do business with the company.

The decision touched off a massive disruption in technology supply chains, hitting some of the biggest component-makers as Intel Corp, Qualcomm Inc and Broadcom Inc told their employees they won't provide products to Huawei until further notice.

Timing of the US action raised questions about whether President Donald Trump is punishing the company in part to gain a negotiating edge with Beijing in a deepening clash over trade.

Talks between Beijing and Washington deadlocked this month as Mr Trump accused China of backing out of a deal that was taking shape with US officials, saying China reneged on an agreement to enshrine a wide range of reforms in law.

NEW LEVIES

Mr Trump increased levies on US$200 billion (S$275 billion) in Chinese imports to 25 per cent from 10 per cent, prompting retaliation from Beijing.

The US has said it's prepared to hit China with new tariffs even as Mr Trump said he'll meet his Chinese counterpart Xi Jinping at next month's G-20 summit, an encounter that could prove pivotal. China is also threatening additional retaliation against the US over the blacklisting of Huawei.

On Monday (May 20), the US Commerce Department granted 90 days of relief for certain US broadband companies using Huawei equipment. Small phone carriers, the main US customers for Huawei, had worried the ban could keep them from performing even routine activities like ordering replacement parts or patching software.

Before trade negotiations hit a wall, some administration officials were reluctant to act against Huawei because Mr Trump had reversed similar measures imposed last year against ZTE Corp - another Chinese telecommunications equipment maker that has been scrutinised over security.

The concern was that Mr Trump might reverse a Huawei order as a favour to Mr Xi or trade it away for soybean purchases by China, the people said.

ZTE almost collapsed after the US Commerce Department banned it for three months in 2018 from buying American technology. Mr Trump undid the sanctions at Mr Xi's request and directed his commerce secretary to negotiate a settlement with the company.

OFFICIALS' CONCERNS

Even now that Huawei is on the Commerce list, some national security officials remain concerned that the president could scrap the order for the sake of the broader trade negotiations.

The White House responded to requests for comment on Monday night by referring to a briefing last week on Mr Trump's executive order restricting access of foreign companies from US suppliers.

But Huawei has been preparing for the US move since at least the middle of 2018, hoarding components while designing its own chips, according to people familiar with the matter, and is said to have stockpiled enough supplies to keep its business running for at least another three months.

Its executives believe their company has become a bargaining chip in the US-China trade war, and that they'll be able to resume purchases from American suppliers if a deal is reached, the people said.

The Trump administration has consistently denied any link between its actions against Chinese telecom companies and trade talks with Beijing. But the president himself has linked the two repeatedly.

Mr Trump said in a December interview with Reuters that he would intervene in US efforts to extradite Huawei executive Meng Wanzhou if doing so would help him reach a trade deal.