{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0734042300","brand":"Molex","brandSlug":"molex","productSlug":"0734042300","canonicalUrl":"https://icsourcedirect.com/molex/0734042300","factsUrl":"https://icsourcedirect.com/api/mcp/products/0734042300","rawCanonicalId":null},"summary":{"shortDescription":"Molex 73404 series SMB receptacle, male pin, 0734042300, 50 Ohm, 4 GHz, 0.2 dB insertion loss, snap-on, through hole, gold body, 500 mating cycles.","salesMarkdown":"## SMB Receptacle for 50 Ohm RF Signal Paths The Molex 0734042300 is a 50 Ohm SMB receptacle in the 73404 series, carrying a male pin contact inside a snap-on mating receptacle body. It is a through-hole, solder-terminated RF interconnect rated to 4 GHz with a typical insertion loss of 0.2 dB — sized for board-level coaxial signal routing in communications, test equipment, and instrumentation where the SMB bayonet-style quick mate is preferred over a threaded interface. The gold-plated brass body and gold centre contact plating support the 500-cycle mating life, and the PTFE dielectric keeps the impedance stable across the -55°C to 155°C operating range. ## RF Performance and Signal Integrity The 4 GHz upper frequency limit with 0.2 dB insertion loss makes this connector suitable for baseband and low-microwave signal paths where the SMB interface's 50 Ohm controlled impedance and snap-on retention are sufficient — no need for the torque-controlled SMA or N-type threads. The 500-cycle mating rating reflects the gold-on-gold contact interface; the snap-on coupling wears the detent spring over repeated connects, so plan for periodic replacement in high-cycle test applications. The brass body and centre contact are gold-plated; the PTFE dielectric is pre-loaded in the housing. No crimp tooling required, but the solder joints need a controlled-profile iron or selective wave to avoid melting the PTFE. The snap-on fastening engages with a mating SMB plug; no coupling nut torque spec to track.","metaTitle":"Molex 73404 0734042300 SMB Receptacle, 50 Ohm, 4 GHz","metaDescription":"Molex 0734042300 SMB receptacle, male pin, 50 Ohm, 4 GHz max, 0.2 dB insertion loss, 500 mating cycles. Active production, sourced to order. RFQ for pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF / Coaxial Connectors","RF Cable Assemblies"],"specifications":{"Mfr":"Molex","Series":"73404","Package":"Bulk","Features":"-","Includes":"-","Impedance":"50 Ohms","Body Finish":"Gold","Cable Group":"-","Body Material":"Brass","Housing Color":"Gold","Mating Cycles":"500","Mounting Type":"Through Hole","Connector Type":"Receptacle, Male Pin","Fastening Type":"Snap-On","Insertion Loss":"0.2dB","Product Status":"Active","Voltage Rating":"335 V","Connector Style":"SMB","Frequency - Max":"4 GHz","Number of Ports":"1","lifecycle_stage":"unknown","Mounting Feature":"-","Ingress Protection":"-","Shield Termination":"Solder","Base Product Number":"073404","Contact Termination":"Solder","Dielectric Material":"Polytetrafluoroethylene (PTFE)","Operating Temperature":"-55°C ~ 155°C","Center Contact Plating":"Gold","Center Contact Material":"Brass"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.4600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/484a2165cfdd0ca8d9722f17289a4734.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the impedance of 0734042300?","answer":"50 Ohms nominal — the standard impedance for RF signal paths, compatible with RG58 and other 50 Ohm coaxial cables."},{"question":"What is the pin configuration of Molex 0734042300?","answer":"Single-port SMB receptacle with one male pin centre contact. The body is the ground/shield path; the centre pin carries the signal. No multi-position pinout — this is a single coaxial interconnect."},{"question":"What is the difference between Molex 73404 and 73405 series?","answer":"The 73404 series (this part) is an SMB receptacle with a male pin contact. The 73405 series is the mating SMB plug — the two are designed as a mating pair. The 73404 receptacle accepts the 73405 plug with a snap-on engagement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/molex/0734042300","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/molex/0734042300 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}}