Pagi, who is one year old, was born at the San Diego Zoo and was living there before being transferred north to Oakland, zoo spokeswoman Nicky Mora said.
Pagi, which means "morning" in Malayan dialect, according to the zoo, will join her sister Bulan and another female bear, Ting Ting.
Zoo officials will be slowly introducing her to the group. When she is available for regular viewing by the public will depend on how she adapts to her new surroundings, Mora said.
Pagi's favorite foods include avocados, dried cranberries, and mealworms.
Sun bears, the smallest members of the bear family, are primarily found in the forest areas of Southeast Asia, according to zoo officials.
They have long, sickle-shaped claws that help them break open wood and tree branches, and have tongues up to 10 inches long that are used to forage for food in tight spaces.
Pagi will be on exhibit from 2 p.m. to 3 p.m. today, and at the same time on Friday, according to Mora. Photo opportunities are available, and a zookeeper will be on hand to answer questions.