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 RepRap & 3D Printers
Upgrade your 3D printer's precision with this 10-piece set of TCST2103 Optical Endstop Switches. 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.
Key Features
- Quantity: 10 pieces per pack — great value for builders and makers
- Model: TCST2103 Optoelectronic Slotted Optical Switch
- Package Type: DIP (Dual In-line Package) — easy to solder on PCBs or breadboards
- Wide Operating Temperature Range: -40°C to +85°C for reliable performance in varied environments
- Low Dissipation Power: Efficient operation with minimal energy draw
- Compatibility: Designed for RepRap 3D printers and compatible with most open-source 3D printer controller boards
- Condition: Brand new
- Country of Origin: Made in Mainland China
What Is an Optical Endstop Switch?
An 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.
Specifications
| Model | TCST2103 |
| Type | Optoelectronic Slotted Switch |
| Package | DIP |
| Operating Temperature | -40°C to +85°C |
| Dissipation Power | Low (1 mW) |
| Quantity | 10 pcs |
| Condition | New |
| Origin | Made in Mainland China |
Who Is This For?
These optical endstop switches are ideal for:
- 3D printer enthusiasts building or repairing RepRap-style machines (Prusa, Mendel, Kossel, etc.)
- Electronics hobbyists and makers needing precise position sensing
- Engineers and prototypers working with motion control systems
- Anyone needing a reliable, bulk supply of TCST2103 sensors at a great price
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Frequently Asked Questions
Q: What is the TCST2103 optical endstop switch used for in 3D printing?
A: 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.
Q: Is the TCST2103 switch compatible with popular 3D printer controller boards?
A: 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.
Q: How many switches are included in this pack?
A: This listing includes 10 pieces of the TCST2103 optical endstop switch, giving you a great-value bulk supply for building, repairing, or upgrading multiple 3D printers or electronics projects.
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.