SAO PAULO, Jan 16 (Reuters) - Brazilian lenders BTG Pactual, Bradesco and Santander Brasil are among those most exposed to debt of Americanas SA (AMER3.SA), analysts' estimates showed on Monday, after the retailer obtained an injunction protecting it from creditors. Analysts at JPMorgan and Citi said in research notes that Banco Bradesco SA (BBDC4.SA) had the largest nominal exposure to the firm, while Banco BTG Pactual SA topped exposure as a proportion of loans. Considering JPMorgan's and Citi's estimates, BTG had a 1.9 billion-real exposure to Americanas, which was seen accounting for roughly 1.5% of its loans, while Bradesco had exposure of 4.7 billion reais, or 0.5% of loans. Banco Santander Brasil SA , the local unit of Spain's Banco Santander (SAN.MC), had 3.7 billion reais in exposure, or about 0.6% of loans. Sergio Rial, the outgoing Americanas chief executive who uncovered the accounting inconsistencies, is a former head of Santander Brasil, where he still serves as chairman of the board.

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