{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"H3DK-GE AC240-440","brand":"Omron","brandSlug":"omron","productSlug":"H3DK-GE-AC240-440","canonicalUrl":"https://aoctrl.com/omron/H3DK-GE-AC240-440","factsUrl":"https://aoctrl.com/api/mcp/products/H3DK-GE%20AC240-440","rawCanonicalId":null},"summary":{"shortDescription":"Omron H3DK-GE AC240-440, H3DK-G series star delta controller timer, SPDT (1 Form C) mechanical relay output 5 A at 250 VAC, 1–120 s delay, 240–440 VAC supply, DIN rail mount, screw terminals.","salesMarkdown":"## What the timer actually does on the panel The H3DK-GE AC240-440 sits in Omron's H3DK-G series of electronic timers, configured as a star delta controller for the classic two-step motor start sequence — close to the line in star, then transition to delta once the timer expires. It accepts a 240 ~ 440 VAC supply across the wide industrial mains range, so the same unit covers 240 V single-phase-derived control, 380 V and 400 V three-phase control transformers, and 440 V plant distribution without a different SKU. The delay range runs 1 Sec ~ 120 Sec, set via a screwdriver slot on the face — the kind of coarse, repeatable adjustment a wireman makes with a powered-down panel and a hand tool, not a keypad. Timing initiates from input voltage, so the unit starts its clock the moment the run command is applied — no separate trigger input to wire. ## Output side: contact form and what it can switch The output is an SPDT (1 Form C) mechanical relay, so a single timer drives both the star contactor and the delta contactor through the changeover — common in star-delta starters where one pole closes to the star coil and the other closes to the delta coil at transition. Contact rating is 5A @ 250VAC, which is the ceiling for the pilot duty driving the contactor coils; this is not a power contactor itself, it is the timing element that tells the contactors when to switch. ## Mounting, wiring, and where it lives in the panel DIN Rail mounting with screw terminals — the timer snaps onto the standard 35 mm rail alongside the contactors it sequences, and the wiring lands on screw clamps rather than spring or push-in, which is the conventional choice for motor-starter cubicles. As a star delta controller in the broader Electronic Timers & Counters category, its job is sequencing the star-to-delta transition in reduced-voltage motor starting — pumps, compressors, fans, and conveyors where a direct-on-line inrush would trip the supply. ## Lifecycle and how it shows up on a BOM Lifecycle reads as mature and Active, so this is a long-running SKU rather than a new-release or end-of-life line — spares and repeat orders are not fighting a last-time-buy window.","metaTitle":"Omron H3DK-GE AC240-440 Star Delta Timer, SPDT, 5A","metaDescription":"Omron H3DK-GE AC240-440 star delta timer, 240–440 VAC supply, SPDT mechanical relay output rated 5A at 250 VAC, 1–120 s delay, DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Electronic Timers & Counters"],"specifications":{"title":"H3DK-GE AC240-440","Series":"H3DK-G","Circuit":"SPDT (1 Form C)","Package":"Bulk","Function":"Star Delta Controller","Delay Time":"1 Sec ~ 120 Sec","Relay Type":"Mechanical Relay","description":"RELAY TIME DELAY 120SEC 5A 250V","Mounting Type":"DIN Rail","lifecycle_stage":"mature","Voltage - Supply":"240 ~ 440VAC","Termination Style":"Screw Terminal","Timing Initiate Method":"Input Voltage","Contact Rating @ Voltage":"5A @ 250VAC","Timing Adjustment Method":"Screwdriver Slot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$107.38 – $135.21","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/18dde34b8cd9146d8645793ee4d4d560.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What series does the H3DK-GE AC240-440 belong to?","answer":"It belongs to Omron's H3DK-G series of electronic timers, configured as a star delta controller within that family."},{"question":"What circuit configuration and contact rating does this timer have?","answer":"The output is an SPDT (1 Form C) mechanical relay rated 5A at 250 VAC — one changeover contact driving the star and delta contactor coils in a reduced-voltage motor starter."},{"question":"What supply voltage range does the H3DK-GE AC240-440 accept?","answer":"It accepts 240 ~ 440 VAC on the supply terminals, covering the common industrial control transformer secondaries from 240 V up through 380 V, 400 V, and 440 V plant mains without needing a different model."},{"question":"What delay range can be set on the H3DK-GE AC240-440?","answer":"The delay is adjustable from 1 second to 120 seconds via a screwdriver slot on the face of the unit, with timing starting automatically when the input voltage is applied."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/H3DK-GE-AC240-440","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/H3DK-GE-AC240-440 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}