{"product_id":"tcst2103-optical-endstop-switch-10pcs-3d-printer-1","title":"10pcs TCST2103 Optical Endstop Limit Switch for 3D Printers","description":"\n\u003ch2\u003eTCST2103 Optical Endstop Switch – 10-Pack for RepRap \u0026amp; 3D Printers\u003c\/h2\u003e\n\u003cp\u003eUpgrade your 3D printer's precision with this 10-piece set of \u003cstrong\u003eTCST2103 Optical Endstop Switches\u003c\/strong\u003e. These optoelectronic limit switches deliver accurate, reliable position sensing to ensure your printer's axes home and stop exactly where they should — every single time. Whether you're building a RepRap, upgrading an existing machine, or working on a custom CNC or electronics project, these switches are a dependable, cost-effective choice.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 10 pieces per pack — great value for builders and makers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e TCST2103 Optoelectronic Slotted Optical Switch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e DIP (Dual In-line Package) — easy to solder on PCBs or breadboards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature Range:\u003c\/strong\u003e -40°C to +85°C for reliable performance in varied environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Dissipation Power:\u003c\/strong\u003e Efficient operation with minimal energy draw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for RepRap 3D printers and compatible with most open-source 3D printer controller boards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is an Optical Endstop Switch?\u003c\/h3\u003e\n\u003cp\u003eAn optical endstop (limit switch) uses an infrared LED and phototransistor housed in a slotted enclosure. When the printer's axis carriage passes through the slot, it breaks the infrared beam, signaling the controller board to stop movement. This provides highly repeatable, contact-free sensing — no mechanical wear, no bouncing signals, and consistent homing accuracy for your prints.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCST2103\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOptoelectronic Slotted Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIP\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDissipation Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow (1 mW)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThese optical endstop switches are ideal for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3D printer enthusiasts building or repairing RepRap-style machines (Prusa, Mendel, Kossel, etc.)\u003c\/li\u003e\n  \u003cli\u003eElectronics hobbyists and makers needing precise position sensing\u003c\/li\u003e\n  \u003cli\u003eEngineers and prototypers working with motion control systems\u003c\/li\u003e\n  \u003cli\u003eAnyone needing a reliable, bulk supply of TCST2103 sensors at a great price\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the TCST2103 optical endstop switch used for in 3D printing?\u003c\/h4\u003e\n\u003cp\u003eA: The TCST2103 optical endstop switch is used as a limit switch on 3D printer axes (X, Y, and Z). It detects when a moving carriage reaches its home or end position by breaking an infrared beam inside the slotted sensor, signaling the controller board to halt movement. This ensures precise, repeatable homing for accurate 3D prints.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the TCST2103 switch compatible with popular 3D printer controller boards?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The TCST2103 is widely compatible with open-source 3D printer controller boards used in RepRap-based printers, including RAMPS 1.4, SKR boards, and similar platforms. Its DIP package makes it easy to solder onto PCBs or endstop carrier boards.\u003c\/p\u003e\n\u003ch4\u003eQ: How many switches are included in this pack?\u003c\/h4\u003e\n\u003cp\u003eA: This listing includes \u003cstrong\u003e10 pieces\u003c\/strong\u003e of the TCST2103 optical endstop switch, giving you a great-value bulk supply for building, repairing, or upgrading multiple 3D printers or electronics projects.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the TCST2103 optical endstop switch used for in 3D printing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The TCST2103 optical endstop switch is used as a limit switch on 3D printer axes (X, Y, and Z). It detects when a moving carriage reaches its home or end position by breaking an infrared beam inside the slotted sensor, signaling the controller board to halt movement. 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