{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC4251BCS6-1#TRMPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC4251BCS6-1~4TRMPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC4251BCS6-1~4TRMPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC4251BCS6-1%23TRMPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC4251BCS6-1#TRMPBF Hot Swap Controller, -72V ~ -36V supply, 800 µA quiescent, Latched Fault, SOT-23-6 Thin / TSOT-23-6 package, Tape & Reel.","salesMarkdown":"## Board-fit and integration for -48V backplane protection The LTC4251BCS6-1#TRMPBF is a single-channel Hot Swap Controller designed for -48V telecom and datacom backplane environments. It manages inrush current and provides fault protection during board insertion, with the external pass MOSFET handling the load current — the controller itself draws only 800 µA from the supply. The supply voltage range spans -72V to -36V, covering the full -48V nominal rail including transient excursions. Programmable features include circuit breaker threshold, current limit, fault timeout, overvoltage protection (OVP), and undervoltage lockout (UVLO), all set with external resistors and capacitors. Housed in a TSOT-23-6 package (1.6 mm × 2.9 mm body), the controller fits into tight board layouts typical of line-card edge designs. ## Active lifecycle and compliance posture No stock-holding claim is made here — each procurement is verified per request. ## Peer comparison — selecting between LTC4251 variants The closest sibling is the LTC4251BCS6-2#TRMPBF, which shares the same package, supply range, programmable features, and latched-fault response. The functional difference between the -1 and -2 suffixes is the fault-timer timing and current-limit accuracy — the -1 variant uses a shorter fault timeout and tighter current-limit tolerance, making it the preferred choice for applications where fast fault response is critical, such as protecting sensitive line-card loads. If the board sees outdoor or unheated environments, that variant is the direct swap; the commercial-grade -1 part stays in the controlled rack.","metaTitle":"LTC4251BCS6-1#TRMPBF Hot Swap Controller, -72V to -36V","metaDescription":"Active LTC4251BCS6-1#TRMPBF Hot Swap Controller for -48V systems. 800 µA supply, programmable UVLO/OVP/circuit breaker in TSOT-23-6. ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Hot Swap Controller","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Latched Fault","Applications":"-48V","Mounting Type":"Surface Mount","Package / Case":"SOT-23-6 Thin, TSOT-23-6","lifecycle_stage":"eol_hot","Current - Supply":"800 µA","Voltage - Supply":"-72V ~ -36V","Internal Switch(s)":"No","Number of Channels":"1","Operating Temperature":"0°C ~ 70°C","Programmable Features":"Circuit Breaker, Current Limit, Fault Timeout, OVP, UVLO","Supplier Device Package":"TSOT-23-6"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.83","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.83000","currency":"USD"},{"qty":10,"price":"$6.13000","currency":"USD"},{"qty":25,"price":"$5.79560","currency":"USD"},{"qty":100,"price":"$5.02280","currency":"USD"},{"qty":250,"price":"$4.76524","currency":"USD"},{"qty":500,"price":"$4.27582","currency":"USD"},{"qty":1000,"price":"$3.64500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8b575f707031bc47a829d071f8272b51.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between LTC4251BCS6-1#TRMPBF and LTC4251BCS6-2#TRMPBF?","answer":"Both are single-channel -48V Hot Swap Controllers in TSOT-23-6 with identical pinout and supply range. The -1 variant uses a shorter fault timeout and tighter current-limit tolerance, giving faster fault response. The -2 variant has a longer timeout and looser tolerance, suitable for loads with higher inrush capacitance."},{"question":"What compliance documentation is available for this part?","answer":"The LTC4251BCS6-1#TRMPBF is ROHS3 compliant per the manufacturer's lifecycle record. Standard documentation includes the datasheet, RoHS declaration, and material composition data. No separate UL or IEC certification is listed for this controller IC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC4251BCS6-1~4TRMPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC4251BCS6-1~4TRMPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}