There isn't a single archipelago specifically named that's located directly on the west side of the equator. However, several archipelagos lie near the west side of the equator and depending on the specific area you're interested in, some examples include:

* The Galapagos Islands: These islands are located in the Pacific Ocean, directly on the equator, but slightly west of it.

* The Philippines: This archipelago is located in the western Pacific Ocean, slightly north of the equator.

* The Sunda Islands (Indonesia): This archipelago is located south of the equator and includes islands like Java, Sumatra, and Borneo, with some parts situated near the western side of the equator.

* The Maluku Islands (Indonesia): This archipelago is located east of the Sunda Islands, also south of the equator and has some islands near the western side of the equator.

Therefore, depending on the exact location and definition of "west equator," there are multiple possibilities. If you can provide more context about the specific archipelago you are looking for, I might be able to give you a more precise answer.