{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"31-10","brand":"Amphenol","brandSlug":"amphenol","productSlug":"31-10","canonicalUrl":"https://icsourcedirect.com/amphenol/31-10","factsUrl":"https://icsourcedirect.com/api/mcp/products/31-10","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC jack, female socket, 50 Ohm, 4 GHz, isolated, panel mount, bayonet lock, solder cup termination, silver center contact, 500 mating cycles, -55°C to 85°C.","salesMarkdown":"## 50 Ohm Isolated BNC Jack — 4 GHz, Solder Cup Termination The 31-10: The key feature here is the isolated design — the connector body is electrically isolated from the mounting panel, which breaks ground loops in test setups and instrumentation where the shield path needs to float relative to chassis ground. Termination is solder cup — the center conductor and braid are hand-soldered to the contact and shield, not crimped. That means cable prep is manual: strip the coax to the right lengths, tin the center conductor, flow solder into the cup, and dress the braid to the body. The silver-plated phosphor bronze center contact gives low contact resistance at first mate, but silver tarnishes over time in humid or sulfurous air; for a test bench connector that gets mated a few hundred times and lives indoors, it's fine. The 500 mating cycles confirm this is a moderate-duty part — not a daily-connect production interface. Panel mounting uses a rear-side nut: the connector body passes through the panel from the outside, and the hex nut and lockwasher (included in the kit —) tighten from inside the enclosure. The bulkhead hole diameter is not listed in the spec, but standard BNC panel-mount jacks typically need a 0.500-inch (12.7 mm) hole — confirm against the product drawing before cutting the panel. ## 50 Ohm Impedance — Cable Match Matters This is a 50 Ohm connector, not 75 Ohm. The 50 Ohm impedance means it's designed to work with 50 Ohm coax cables — RG-58, RG-174, RG-213, LMR-195, and similar. A 75 Ohm BNC (common in video/CCTV) has a different center contact diameter and dielectric geometry; mating a 50 Ohm jack to a 75 Ohm plug will cause an impedance mismatch that degrades return loss above a few hundred MHz. The 31-10 is the 50 Ohm isolated version in Amphenol's BNC line; the non-isolated sibling (31-2) shares the same body and termination but lacks the isolation feature, so the body is electrically common with the panel ground. If your application requires the shield to float, the 31-10 is the correct pick.","metaTitle":"Amphenol 31-10 BNC Jack, Isolated, 50 Ohm, 4 GHz, Solder Cup","metaDescription":"Amphenol 31-10 BNC jack, female socket, 50 Ohm impedance, 4 GHz max frequency, isolated design, silver-plated center contact, solder cup termination, panel","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors"],"specifications":{"Mfr":"Amphenol RF","Series":"-","Package":"Bulk","Features":"Isolated","Includes":"3 pcs - 1 Connector, 1 Lockwasher, 1 Nut","Impedance":"50 Ohms","Body Finish":"Nickel","Cable Group":"-","Body Material":"Brass","Housing Color":"Silver, White","Mating Cycles":"500","Mounting Type":"Panel Mount","Connector Type":"Jack, Female Socket","Fastening Type":"Bayonet Lock","Insertion Loss":"0.2dB","Product Status":"Active","Voltage Rating":"500 V","Connector Style":"BNC","Frequency - Max":"4 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"Bulkhead - Rear Side Nut","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"31-10","Contact Termination":"Solder Cup","Dielectric Material":"Polyamide (PA), Nylon","Operating Temperature":"-55°C ~ 85°C","Center Contact Plating":"Silver","Center Contact Material":"Phosphor Bronze"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.8500","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/31-10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the Amphenol 31-10 BNC connector available via RFQ confirmation?","answer":"The 31-10 is an active-production part sourced through independent distribution. No stock-holding claim is made — submit an RFQ for the quantity and lead time."},{"question":"Is the Amphenol 31-10 a 75 Ohm connector?","answer":"No. A 75 Ohm BNC uses a different center contact and dielectric; mating a 50 Ohm jack to a 75 Ohm plug will cause an impedance mismatch that degrades signal integrity above a few hundred MHz."},{"question":"What is the difference between the 31-10 and the 31-2?","answer":"The 31-10 is the isolated version — the connector body is electrically isolated from the panel. The 31-2 is the non-isolated sibling, where the body is common with chassis ground. Both share the same BNC interface, 50 Ohm impedance, 4 GHz rating, and solder cup termination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/31-10","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/31-10 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}}