{"product_id":"three-phase-7-day-programmable-timer-switch-380v-lcd","title":"3-Phase 7-Day Programmable Timer Switch 380V | 28 Programs","description":"\n\u003ch2\u003eCN109S-380V Three-Phase 7-Day Programmable Digital Timer Switch\u003c\/h2\u003e\n\u003cp\u003eTake full control of your three-phase industrial and commercial equipment with the \u003cstrong\u003eCN109S-380V Programmable Timer Switch\u003c\/strong\u003e. Featuring a large backlit LCD display and precision-to-the-second scheduling, this robust digital time controller lets you automate pumps, aerators, exhaust fans, water heaters, signage, and more — completely hands-free, 24\/7.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Timer Switch?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28 ON\/OFF Programs:\u003c\/strong\u003e Schedule up to 28 independent on\/off events across a 7-day (Monday–Sunday) weekly cycle — perfect for complex automation routines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1-Second Interval Precision:\u003c\/strong\u003e Accurate-to-the-second timing gives you pinpoint control over your equipment's operating schedule.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree-Phase Design (No Neutral Line Required):\u003c\/strong\u003e Three live-wire input and output configuration eliminates the need for a neutral\/zero line — a practical advantage for installations where a neutral line is unavailable.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Range:\u003c\/strong\u003e Accepts input from 350–440VAC (50\/60Hz) and delivers a 16A \/ 380VAC output, compatible with three-phase motors and industrial equipment rated 350V–420VAC.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Backup:\u003c\/strong\u003e Built-in battery backup preserves your programmed settings during power outages so you never lose your schedule.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManual Override:\u003c\/strong\u003e Instantly override any scheduled program with a manual on\/off control — ideal for maintenance or unexpected changes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Backlit LCD:\u003c\/strong\u003e Large, bright display ensures easy reading and programming in any lighting condition.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Power Indicator:\u003c\/strong\u003e Clearly shows operational status at a glance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReset Function:\u003c\/strong\u003e Quickly restore default settings when needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePermanent Loop Mode:\u003c\/strong\u003e Set once and let it run indefinitely — true unmanned, set-and-forget automation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCN109S-380V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e350–440VAC, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16A, 380VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrograms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28 ON\/OFF (daily \u0026amp; weekly)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eScheduling Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7 days (Monday–Sunday), 24-hour\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Interval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 second\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Interval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e168 hours (1 week)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLarge backlit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackup\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBattery backup (battery not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pumps \u0026amp; pond aerators\u003c\/li\u003e\n  \u003cli\u003eIndustrial steaming machines\u003c\/li\u003e\n  \u003cli\u003eCommercial water heaters\u003c\/li\u003e\n  \u003cli\u003eBillboards \u0026amp; neon signs\u003c\/li\u003e\n  \u003cli\u003eExhaust fans \u0026amp; ventilation systems\u003c\/li\u003e\n  \u003cli\u003eThree-phase motors \u0026amp; industrial equipment (350V–420VAC)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× CN109S-380V Three-Phase Programmable Timer Switch\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Colors may vary slightly from images due to screen settings. Please allow ±1cm dimensional tolerance due to manual measurement. Battery not included.\u003c\/p\u003e\n\n\u003cp\u003eFor general electrical safety guidelines and best practices, refer to the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety resource\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does the CN109S-380V timer switch require a neutral (zero) line to operate?\u003c\/h4\u003e\n\u003cp\u003eA: No — the CN109S-380V three-phase timer switch uses three live-wire inputs and outputs only, with no neutral line required. This makes it ideal for three-phase installations where a neutral line is not available or is inconvenient to wire.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many schedules can I program on this 7-day timer switch?\u003c\/h4\u003e\n\u003cp\u003eA: You can program up to 28 ON\/OFF events across a full 7-day (Monday–Sunday) weekly cycle. Schedules can be set for individual days or recurring weekly patterns, with a minimum interval of 1 second and a maximum of 168 hours (one full week).\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will my programmed schedule be lost during a power outage?\u003c\/h4\u003e\n\u003cp\u003eA: No. The CN109S-380V includes a built-in battery backup that retains all programmed settings even during a power failure, so your automation schedule picks up right where it left off once power is restored. Note that the backup battery is not included in the package.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of equipment is this three-phase timer switch compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This timer switch is compatible with three-phase equipment operating at 350V–420VAC, including water pumps, pond aerators, steaming machines, water heaters, exhaust fans, billboards, neon signage, and industrial motors. Its 16A output rating makes it suitable for a wide range of commercial and industrial applications.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does the CN109S-380V timer switch require a neutral (zero) line to operate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — the CN109S-380V three-phase timer switch uses three live-wire inputs and outputs only, with no neutral line required. 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