{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX5903LBEUT+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX5903LBEUTT","canonicalUrl":"https://icboms.com/analog-devices/MAX5903LBEUTT","factsUrl":"https://icboms.com/api/mcp/products/MAX5903LBEUT%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated Simple Swapper™ hot swap controller, MAX5903LBEUT+T, 9V to 72V supply, SOT-23-6 package, -40°C to 85°C, active production.","salesMarkdown":"## What this Simple Swapper controller does on your board The MAX5903LBEUT+T is a hot swap controller from Maxim Integrated's Simple Swapper series — it lets you safely insert and remove a circuit board from a live backplane without arcing or voltage glitches. It controls an external N-channel MOSFET to ramp the inrush current, then monitors for overcurrent faults. The 9V to 72V supply range covers 24V industrial and 48V telecom rails, and the -40°C to 85°C temperature grade suits factory-floor and outdoor cabinet environments. This is a controller, not a load switch — there is no internal MOSFET, so your BOM needs an external N-channel FET rated for the rail voltage and load current. The SOT-23-6 package keeps the footprint small, but the external FET and sense resistor take up board space nearby. ## Ratings that drive the BOM decision The 9V to 72V input range is what makes this part fit a 48V telecom rectifier or a 24V motor-drive backplane — not a 12V server rack. The undervoltage lockout (UVLO) is programmable via an external resistor divider, so you set the turn-on threshold for your specific rail, avoiding brownout conditions on a sagging supply. Fault timeout, latched fault, and thermal limit are built in — no separate supervisor IC needed. The 1 mA supply current is the controller's own draw; the load current is handled entirely by the external FET. ## Field-swap note: what is in the kit If you are replacing this on a live board in the field, the SOT-23-6 is a hand-solderable package — no hot-air station required. But remember: the external MOSFET and sense resistor are separate parts; if the hot swap channel failed, check those too. The UVLO programming resistors set the turn-on voltage — swapping the controller alone might not fix a no-power symptom if the resistor divider drifted.","metaTitle":"MAX5903LBEUT+T Hot Swap Controller, Simple Swapper, 9V-72V","metaDescription":"MAX5903LBEUT+T Simple Swapper hot swap controller from Maxim. 9V to 72V supply, SOT-23-6, -40°C to 85°C. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"Simple Swapper™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Hot Swap Controller","Series":"Simple Swapper™","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Fault Timeout, Latched Fault, Thermal Limit","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"SOT-23-6","lifecycle_stage":"eol_hot","Current - Supply":"1 mA","Voltage - Supply":"9V ~ 72V","Internal Switch(s)":"No","Number of Channels":"1","Operating Temperature":"-40°C ~ 85°C","Programmable Features":"UVLO","Supplier Device Package":"SOT-6"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.24","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.24000","currency":"USD"},{"qty":10,"price":"$5.60100","currency":"USD"},{"qty":25,"price":"$5.29480","currency":"USD"},{"qty":100,"price":"$4.58890","currency":"USD"},{"qty":250,"price":"$4.35360","currency":"USD"},{"qty":500,"price":"$3.90648","currency":"USD"},{"qty":1000,"price":"$3.29462","currency":"USD"},{"qty":2500,"price":"$3.12989","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/713d1ef949327f85a7d09d2ebea02c0f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent of MAX5903LBEUT+T?","answer":"Within the Simple Swapper family, the MAX5902 and MAX5904 series are pin-compatible variants with different fault-timeout and latch options. For a specific cross, compare the UVLO programming and fault behavior against your design requirements."},{"question":"Where can I buy MAX5903LBEUT+T?","answer":"We source this part to order; availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX5903LBEUTT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX5903LBEUTT 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}}