10pcs TCST2103 Optical Endstop Limit Switch for 3D Printers
10pcs TCST2103 Optical Endstop Limit Switch for 3D Printers
TCST2103 Optical Endstop Switch – 10-Pack for 3D Printers
Upgrade your RepRap or other 3D printer build with this reliable 10-piece set of TCST2103 Optical Endstop Switches. These optoelectronic limit switches provide precise, consistent position detection for all three axes of your printer, helping ensure accurate homing and smooth print results every time.
Key Features
- Quantity: 10 pieces per pack — great value for builders and makers
- Component: TCST2103 slotted optical switch (transmissive/slot-type optoelectronic sensor)
- Package Type: DIP (Dual Inline Package) — easy to solder onto PCBs or breadboards
- Operating Temperature Range: -40°C to +85°C — suitable for a wide range of environments
- Application: Ideal for RepRap 3D printers, CNC machines, robotics, and other position-sensing projects
- Condition: Brand new components
- High-Concerned Chemicals: None
What Is a TCST2103 Optical Endstop Switch?
The TCST2103 is a slotted optical switch that uses an infrared LED emitter and a phototransistor detector housed in a single package. When an object (such as a flag or tab on a printer carriage) passes through the slot, it interrupts the infrared beam and triggers a signal — giving your controller board a precise, repeatable position reference. This makes them an excellent choice for endstop and homing functions on 3D printers and similar motion-control systems.
Specifications
| Model | TCST2103 |
| Package | DIP |
| Operating Temperature | -40°C to +85°C |
| Type | Slotted Optoelectronic Switch |
| Quantity | 10 pieces |
| Country of Origin | Made in Mainland China |
Who Is This For?
These switches are perfect for:
- DIY 3D printer builders (RepRap, Prusa, CoreXY, and more)
- CNC router and laser cutter hobbyists
- Electronics engineers and prototypers needing reliable position detection
- Robotics and automation project builders
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Frequently Asked Questions
Q: What 3D printer types are TCST2103 optical endstop switches compatible with?
A: The TCST2103 optical endstop switches are compatible with most RepRap-style 3D printers, including popular designs such as Prusa, Mendel, CoreXY, and delta-style printers. They are widely used wherever a precise, non-contact limit switch or homing sensor is needed on a motion-control axis.
Q: How does the TCST2103 optoelectronic switch work?
A: The TCST2103 is a slotted (transmissive) optical sensor. It contains an infrared LED on one side of its slot and a phototransistor on the other. When nothing is in the slot, the infrared beam is detected and the output is in one state. When an object (like a small flag or tab attached to the printer carriage) enters the slot, the beam is blocked and the output changes — signalling the controller board that the axis has reached its home or limit position.
Q: Do these come soldered to a PCB or as bare components?
A: These are supplied as bare DIP-package components (10 pieces), ready to be soldered onto your own PCB, stripboard, or endstop breakout board. They are not pre-assembled onto a ready-made endstop PCB, so some basic soldering is required for installation.
Q: What is the operating temperature range of the TCST2103?
A: The TCST2103 optical switch operates reliably across a wide temperature range of -40°C to +85°C, making it suitable for indoor workshop environments as well as more demanding temperature conditions.
Production & Packaging Notice
To 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.