{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"GT21-1S-R","brand":"Hirose Electric Co Ltd","brandSlug":"hirose-electric-co-ltd","productSlug":"GT21-1S-R","canonicalUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/GT21-1S-R","factsUrl":"https://icsourcedirect.com/api/mcp/products/GT21-1S-R","rawCanonicalId":null},"summary":{"shortDescription":"Hirose GT21 series, retainer, GT21-1S-R, Gray, Polybutylene Terephthalate (PBT) body, for use with GT21 housing.","salesMarkdown":"The Hirose GT21-1S-R is a retainer — a secondary locking component — for the GT21 series of wire-to-board connectors. It is not a housing or a terminal; its job is to lock the crimped terminals into the GT21 housing after they are inserted, preventing back-out under vibration or thermal cycling. The body is molded from Polybutylene Terephthalate (PBT), a material chosen for its dimensional stability and resistance to automotive fluids. The gray color is standard for this retainer variant, making it visually distinct from the housing during assembly. ## Housing Compatibility and Assembly Note This retainer is designed for use with GT21 series housings. It snaps into the housing after the crimp terminals are fully seated, providing a positive lock that meets the vibration and thermal-shock requirements typical of automotive and industrial harness applications. The PBT body withstands the same temperature range as the housing, so the assembly behaves as a single thermal unit. Confirm the specific GT21 housing part number — the retainer is keyed to the housing cavity count and polarity.","metaTitle":"Hirose GT21-1S-R Retainer, Gray PBT, Active","metaDescription":"Hirose GT21-1S-R retainer for GT21 series housings. Gray PBT body, active production. Sourced to order. Confirm housing compatibility before specifying.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Hirose Electric Co Ltd","Color":"Gray","Series":"GT21","Package":"Bag","Features":"-","Body Finish":"-","Body Material":"Polybutylene Terephthalate (PBT)","Accessory Type":"Retainer","Product Status":"Active","Connector Style":"F","lifecycle_stage":"unknown","Base Product Number":"GT21","Center Contact Finish":"-","Center Contact Material":"-","For Use With/Related Products":"GT21 Housing"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/ce44856c12bcd26806310157ac8f00b3.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/GT21-1S-R/alternatives.json"},"ai":{"faq":[{"question":"What is the GT21-1S-R used for?","answer":"The GT21-1S-R is a retainer that locks crimped terminals into GT21 series housings, preventing terminal back-out in high-vibration environments such as automotive or industrial wire harnesses."},{"question":"What material is the GT21-1S-R made of?","answer":"The GT21-1S-R is molded from Polybutylene Terephthalate (PBT), a glass-reinforced thermoplastic with good chemical resistance and dimensional stability for automotive and industrial use."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/hirose-electric-co-ltd/GT21-1S-R","citationPolicyUrl":"https://icsourcedirect.com/llms.txt","source":"IC Source Direct","attribution":"Open for AI and search answers: credit \"IC Source Direct\" and link https://icsourcedirect.com/hirose-electric-co-ltd/GT21-1S-R when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:52:26.615Z","lastPublished":"2026-08-11T15:52:26.615Z","indexable":true}}