{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AQY221N3TW","brand":"Panasonic Electric Works","brandSlug":"panasonic-electric-works","productSlug":"AQY221N3TW","canonicalUrl":"https://icboms.com/panasonic-electric-works/AQY221N3TW","factsUrl":"https://icboms.com/api/mcp/products/AQY221N3TW","rawCanonicalId":null},"summary":{"shortDescription":"Panasonic Electric Works PhotoMOS™ AQY2, SPST-NO (1 Form A) solid-state relay, AQY221N3TW, 150 mA load, 0-25 V, 1.14 VDC input, 7.5 Ω max on-resistance, 4-VSSOP (4-SMD) surface-mount, tape-and-reel.","salesMarkdown":"## What the AQY221N3TW is and what it switches The AQY221N3TW is a PhotoMOS solid-state relay (optomos) in the AQY2 series — Panasonic's signal-level SSR family — with a single SPST-NO (1 Form A) contact, meaning it makes a normally-open AC or DC switching path when the LED input is energised at 1.14 VDC. Maximum load current is 150 mA and the load voltage range spans 0-25 V, so this part sits squarely in the low-power signal domain — ideal for sensing lines, analog frontend switching, or routing reference voltages where a mechanical relay's contact bounce would be unacceptable. ## Load ratings and on-state resistance — what 7.5 Ω means for signal integrity On-state resistance is specified at a worst-case 7.5 Ω maximum. For a 150 mA signal path that is not a problem, but in a low-level analog switch role — thermocouple, strain gauge bridge, or source-measure reference — the voltage drop across the relay when carrying a few milliamps adds directly to the measurement error budget. A solid-state relay in this resistance class is the right fit for digital logic-level switching, not precision analog multiplexing. The 0-25 V load rating covers standard 5 V, 12 V, and 24 V logic rails directly. At 1.14 V input, the LED drive threshold is low enough for direct logic-fet drive from a 3.3 V microcontroller pin — no level-translation required. ## Package and board-fit for repair or production The 4-VSSOP (4-SMD, 0.071-inch / 1.80 mm body) package is a standard JEDEC footprint — widely supported by hot-air rework stations and fine-pitch SMT nozzles. The tape-and-reel packaging (TR) is the production-format variant, so reels sourced here are the same reel format used on the original build. No orientation key ambiguity: pin 1 is defined by the package geometry, and the tab silhouette on the silkscreen makes it readable under magnification before power is applied. Surface-mount termination with the SMT tab style means the part sits flat to the pad — reflow or hot-bar compatible without a socket. Because this is a solid-state relay with an internal LED, the part is polarity-sensitive on the input side: pin assignment matters and must match the drive circuit schematic before assembly. ## Active sourcing posture — what the lifecycle entry means for your BOM No official successor or cross-reference is entered in the ledger, so there is no manufacturer-named pin-compatible alternative on file. The AQY2 series is well-established in the Panasonic relay lineup, but confirming an alternative from the same family is a check worth doing against the full series parametric table before committing to a single-source BOM line.","metaTitle":"AQY221N3TW PhotoMOS Relay, 150 mA, 25 V, SPST-NO, 4-VSSOP","metaDescription":"Panasonic PhotoMOS AQY221N3TW solid-state relay, SPST-NO, 150 mA load, 0-25 V, 1.14 V input, 4-VSSOP SMD. Active status. Quoted to order on RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Signal Relays"],"specifications":{"Mfr":"Panasonic Electric Works","Series":"PhotoMOS™ AQY2","Circuit":"SPST-NO (1 Form A)","Package":"Tape & Reel (TR)","Output Type":"AC, DC (RF)","Load Current":"150 mA","Mounting Type":"Surface Mount","Package / Case":"4-SMD (0.071\\\", 1.80mm)","Product Status":"Active","Voltage - Load":"0 V ~ 25 V","Voltage - Input":"1.14VDC","lifecycle_stage":"unknown","Termination Style":"SMD (SMT) Tab","Base Product Number":"AQY221","Supplier Device Package":"4-VSSOP","On-State Resistance (Max)":"7.5 Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.9150","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What series and circuit configuration does the AQY221N3TW use?","answer":"The AQY221N3TW belongs to the PhotoMOS AQY2 series and is configured as a single-pole single-throw normally-open (SPST-NO, 1 Form A) solid-state relay — one normally-open switching path controlled by an internal LED input."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/panasonic-electric-works/AQY221N3TW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/panasonic-electric-works/AQY221N3TW 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}}