{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"903-373J-51A","brand":"Amphenol","brandSlug":"amphenol","productSlug":"903-373J-51A","canonicalUrl":"https://icsourcedirect.com/amphenol/903-373J-51A","factsUrl":"https://icsourcedirect.com/api/mcp/products/903-373J-51A","rawCanonicalId":null},"summary":{"shortDescription":"Amphenol RF SMB jack, male pin, 50 Ohm, 4 GHz, right-angle through-hole, gold center contact, tin body, snap-on, 500 cycles.","salesMarkdown":"## 50 Ohm SMB Jack, 4 GHz Ceiling The 903-373J-51A: The 4 GHz ceiling covers common cellular (LTE, 5G sub-6), GPS, and ISM-band links without rolling off the passband. ## Right-Angle Through-Hole, Snap-On Mating The right-angle through-hole mount puts the RF path parallel to the board — fits low-profile enclosures where a straight jack would push the cable too high off the PCB. The snap-on fastening mates with standard SMB snap-on plugs; no threading or torque tool needed. The shield and center contact both terminate by solder, so the ground path is a direct soldered joint, not a press-fit or crimp. ## Wide Temperature Range, 500 Mating Cycles The gold-plated center contact supports 500 mating cycles; the tin-plated brass body saves cost over a full-gold shell in fixed-install or low-reconnect applications. The PTFE dielectric keeps insertion loss at 0.6 dB through 4 GHz. ## Tin Body vs Gold Body — 903-415J-51P The 903-373J-51A shares the same 50 Ohm impedance, 4 GHz ceiling, 500 mating cycles, and snap-on SMB interface as the 903-415J-51P. The difference is the shell: tin-plated brass here (silver appearance) vs gold-plated brass on the 903-415J-51P. The gold body adds corrosion margin in salt-fog or high-humidity environments; the tin body is the cost-optimized choice for controlled indoor or sealed enclosures. Insertion loss on the gold-body sibling is 0.3 dB, half the 0.6 dB of this part — the tin finish adds a small loss penalty at the upper frequency end.","metaTitle":"Amphenol RF 903-373J-51A SMB Jack, 50 Ohm, 4 GHz","metaDescription":"Amphenol RF 903-373J-51A SMB jack, male pin, 50 Ohm impedance, 4 GHz max frequency, through-hole right-angle mount, gold center contact, tin body, 500 mating","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":"-","Impedance":"50Ohm","Body Finish":"Tin","Cable Group":"-","Body Material":"Brass","Housing Color":"Silver","Mating Cycles":"500","Mounting Type":"Through Hole, Right Angle","Connector Type":"Jack, Male Pin","Fastening Type":"Snap-On","Insertion Loss":"0.6dB","Product Status":"Active","Connector Style":"SMB","Frequency - Max":"4 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"903-373J","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-65°C~165°C","Center Contact Plating":"Gold","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.6200","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/903-373J-51A/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent or cross reference for 903-373J-51A?","answer":"The closest functional equivalent in the same SMB family is the 903-415J-51P, which has a gold-plated body and lower 0.3 dB insertion loss. Both share the same 50 Ohm impedance, 4 GHz frequency ceiling, snap-on interface, and 500 mating cycles."},{"question":"What is the mating connector for 903-373J-51A?","answer":"This jack mates with any standard SMB snap-on plug connector. The snap-on fastening is the SMB standard — no threading, no bayonet. Confirm the plug's center contact is a female socket to match this male pin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/amphenol/903-373J-51A","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/903-373J-51A 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}}