{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC4251BIS6-1#TRMPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC4251BIS6-1TRMPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC4251BIS6-1TRMPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC4251BIS6-1%23TRMPBF","rawCanonicalId":null},"summary":{"shortDescription":"Linear Technology LTC4251BIS6-1#TRMPBF, Hot Swap Controller, -48V, 1-channel, no internal switch, SOT-23-6 Thin/TSOT-23-6, -40°C to 85°C, Tape & Reel.","salesMarkdown":"## -48V hot swap controller in a TSOT-23-6 The LTC4251BIS6-1#TRMPBF is a single-channel hot swap controller from Linear Technology, designed to manage inrush current and provide fault protection on -48V power rails. It operates over a supply range of -72V to -36V, covering the standard telecom -48V bus with margin for transients. The controller does not integrate the pass MOSFET — an external N-channel FET handles the current path, which lets the designer size the FET to the load current and thermal budget. Programmable features include circuit breaker threshold, current limit, fault timeout, undervoltage lockout (UVLO), and overvoltage protection (OVP), all set with external resistors and capacitors. The part is housed in a TSOT-23-6 package for surface-mount assembly and is rated for industrial temperature environments from -40°C to 85°C. ## External MOSFET — BOM planning An external N-channel MOSFET is required; the controller's 800 µA supply current is the controller-only draw. ## Active production — no LTB pressure The LTC4251BIS6-1#TRMPBF is listed as Active in production with ROHS3 compliance. There is no last-time-buy notice or obsolescence risk on the horizon. ## Sourcing and availability For a BOM line that needs this exact controller, submit an RFQ to get a firm delivery commitment. The ROHS3 compliance and industrial temperature grade make it a straightforward drop-in for most -48V designs.","metaTitle":"LTC4251BIS6-1#TRMPBF Hot Swap Controller, -48V, TSOT-23-6","metaDescription":"LTC4251BIS6-1#TRMPBF -48V hot swap controller with latched fault, programmable UVLO/OVP/current limit. Industrial temp, active production, ROHS3.","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":"-40°C ~ 85°C","Programmable Features":"Circuit Breaker, Current Limit, Fault Timeout, OVP, UVLO","Supplier Device Package":"TSOT-23-6"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.47","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.47000","currency":"USD"},{"qty":10,"price":"$5.84800","currency":"USD"},{"qty":25,"price":"$5.57600","currency":"USD"},{"qty":100,"price":"$4.84160","currency":"USD"},{"qty":500,"price":"$4.46896","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8b575f707031bc47a829d071f8272b51.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does LTC4251BIS6-1 require an external MOSFET or is it integrated?","answer":"An external N-channel MOSFET is required — the controller has no internal switch. The gate drive is designed for standard logic-level or standard-threshold FETs."},{"question":"What are the programmable fault features of LTC4251BIS6-1?","answer":"The controller offers programmable circuit breaker threshold, current limit, fault timeout, overvoltage protection (OVP), and undervoltage lockout (UVLO). Faults latch off until the input is cycled."},{"question":"What is the difference between LTC4251 and LTC4252?","answer":"The LTC4251 series (including this -1 variant) offers latched fault behavior, while the LTC4252 series typically offers auto-retry or timed restart. Both are -48V hot swap controllers with similar programmable features, but the fault response differs. For this part, the latched fault is the key distinction — it stays off after a fault until power is cycled."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC4251BIS6-1TRMPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC4251BIS6-1TRMPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}