{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"031-5557-RFX","brand":"Amphenol","brandSlug":"amphenol","productSlug":"031-5557-RFX","canonicalUrl":"https://icsourcedirect.com/amphenol/031-5557-RFX","factsUrl":"https://icsourcedirect.com/api/mcp/products/031-5557-RFX","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF BNC plug, male pin, 50 Ohm, 4 GHz, 500 V, crimp shield, bayonet lock, free-hanging, -65 to 165 °C, 500 mating cycles, gold centre contact.","salesMarkdown":"## 50-Ohm BNC Plug for RG-58 and LMR-195 Coax The 031-5557-RFX: It ships as two pieces — the connector body and a separate ferrule — so you crimp the centre contact, then crimp the ferrule over the braid for the shield termination. ## 4 GHz Ceiling and 500 V Rating Rated to 4 GHz maximum frequency, this plug covers the full VHF/UHF band and most video and RF test applications up through the lower microwave range. Insertion loss is specified at 0.2 dB, which is low enough that a single connector pair adds negligible signal attenuation in a short cable run. This plug accepts RG-58, RG-58B, RG-58C, RG-141, RG-303, LMR-195, Belden B7806A, and Belden 9907. All are 50-Ohm cables, so the ferrule and centre-contact crimp dimensions are sized for that common jacket and dielectric OD. ## Wide Temperature Range and Materials The dielectric is polyoxymethylene (POM) acetal, which holds its dielectric properties across the full temperature span.","metaTitle":"Amphenol RF 031-5557-RFX BNC Plug, 50 Ohm, 4 GHz, Crimp","metaDescription":"Amphenol RF 031-5557-RFX BNC plug, male pin, 50 Ohm, 4 GHz max, 500 V, crimp shield termination. Active production, sourced to order.","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":"-","Includes":"2 pcs - 1 Connector, 1 Ferrule","Impedance":"50Ohm","Body Finish":"Nickel","Cable Group":"RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907","Body Material":"Brass","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Free Hanging (In-Line)","Connector Type":"Plug, Male Pin","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":"-","Ingress Protection":"-","Shield Termination":"Crimp","Base Product Number":"031-55","Contact Termination":"Push On","Dielectric Material":"Polyoxymethylene (POM) Acetal","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.2772","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/031-5557-RFX/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/031-5557-RFX","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/031-5557-RFX 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}}