{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"031-70538-12G","brand":"Amphenol","brandSlug":"amphenol","productSlug":"031-70538-12G","canonicalUrl":"https://icsourcedirect.com/amphenol/031-70538-12G","factsUrl":"https://icsourcedirect.com/api/mcp/products/031-70538-12G","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC jack, female socket, 75 Ohm, 12 GHz max, bayonet lock, crimp termination, nickel body, gold center contact, bulk pack includes connector + contact + ferrule + insulator.","salesMarkdown":"The 031-70538-12G: It is rated to 12 GHz, which puts it well beyond the bandwidth needed for standard-definition video — this connector is sized for high-frequency broadband, HD-SDI broadcast, and instrumentation links where the 75 Ohm impedance path must be maintained cleanly through the interconnect. The kit ships as four pieces: the connector body, one center contact, one crimp ferrule, and one PTFE insulator. That means a single order code covers everything needed to terminate one cable end — no separate sourcing of the contact or ferrule. This jack is specified for Belden 1855A and 4855R cables — both are 75 Ohm precision coax types with a solid or stranded center conductor and a foam or solid polyethylene dielectric. If you are terminating a different 75 Ohm cable with similar dielectric diameter and braid coverage, compare the cable group dimensions against the crimp tooling range before committing. That cycle life is typical for a BNC in test-equipment or patch-panel service where the connector sees regular reconnection; for a permanent install the gold plating is margin, not a limit. The 034-1107-12G is the mating male plug for this jack — same 75 Ohm impedance, same 500-cycle rating, same Belden 1855A/4855R cable group, same bayonet lock interface. The difference is gender: the 031-70538-12G is a jack (female socket), the 034-1107-12G is a plug (male pin). If you are building a cable assembly, order one of each per mated pair. The 031-70558-12G is also a plug but specified for Belden 4694P cable — different dielectric dimensions, so the crimp ferrule and center contact may not match the 1855A cable group. Stick with the 034-1107-12G for this cable type.","metaTitle":"Amphenol RF 031-70538-12G BNC Jack, 75 Ohm, 12 GHz","metaDescription":"Amphenol RF 031-70538-12G BNC jack, 75 Ohm, rated to 12 GHz. Female socket, bayonet lock, crimp termination for Belden 1855A/4855R.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors","RF Cable Assemblies"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"-","Includes":"4 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Insulator","Impedance":"75Ohm","Body Finish":"Nickel","Cable Group":"Belden 1855A, 4855R","Body Material":"Brass","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line)","Connector Type":"Jack, Female Socket","Fastening Type":"Bayonet Lock","Insertion Loss":"-","Product Status":"Active","Connector Style":"BNC","Frequency - Max":"12 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Crimp","Base Product Number":"031-70","Contact Termination":"Crimp","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Phosphor Bronze"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.5500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/7b7ca5e2b2c00a40f32eada4b90129a4.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/031-70538-12G/alternatives.json"},"ai":{"faq":[{"question":"Is 031-70538-12G compatible with RG59 cable?","answer":"The specified cable group is Belden 1855A and 4855R. RG59 is a 75 Ohm coax but has different dielectric and jacket dimensions — the crimp ferrule and center contact in this kit are sized for the Belden types listed. For RG59, check the 031-70016 which is specified for RG-179/187 cable groups."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/031-70538-12G","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/amphenol/031-70538-12G when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-23T20:41:44.623Z","lastPublished":"2026-07-23T20:41:44.623Z","indexable":true}}