Jong-hee Han had led the South Korean firm’s smartphone and consumer electronics division. No immediate successor has been named.

Han Jong-Hee, the co-chief executive of Samsung Electronics and a nearly four-decade veteran of the South Korean consumer technology giant, died on Tuesday. Mr. Han, who was 63, suffered a sudden heart attack, according to a company spokeswoman.

Samsung Electronics' Co-CEO Han Jong-hee has passed away at the age of 63 due to cardiac arrest. Known for his leadership in consumer electronics, Han played a pivotal role at Samsung for nearly 40 years.