EC11 Horizontal Rotary Encoder: 15mm Knurled Shaft & D-Shaft, 20-Pulse Digital Potentiometer with Switch

‌1. ptimized Mechanical Design‌

The 15mm shaft is available in two practical configurations: knurled (flower-shaped) for enhanced grip and anti-slip performance, and precision-machined D-half shaft that locks securely with matching knobs to eliminate play even under continuous vibration. With 20 detents per full rotation, every “click” delivers clear, tactile positioning feedback, allowing users to perform accurate blind operations without visual confirmation. The 360° unlimited continuous rotation design removes mechanical end stops, preventing component damage from over-rotation and extending operational lifespan. The horizontal side-mount structure fits perfectly into slim device enclosures, saving critical PCB space for compact product designs.

2. ‌Stable Electrical Performance‌

Built with high-quality contact brush components, this encoder supports a standard 5V DC working voltage, with a low static operating current of approximately 1mA that is fully compatible with 3.3V logic systems for modern microcontrollers. It outputs 20 complete orthogonal pulse cycles per full rotation, with a phase difference of no less than 4ms between the A and B channels, ensuring accurate direction recognition and position counting. The insulation resistance reaches 100MΩ minimum at DC 250V, and it withstands AC 300V dielectric strength for 1 minute, delivering strong anti-interference capability even in complex electromagnetic environments. The integrated independent push switch supports separate input functions, expanding operation modes without occupying extra panel space.

3. ‌Durability & Manufacturing Reliability‌

The metal housing and high-wear-resistant internal components guarantee a rotation lifespan of over 200,000 cycles, while the push switch achieves a rated lifespan of more than 500,000 presses.

‌4. User-Friendly Integration‌

The 5-pin layout follows the universal industry standard, with clearly defined pins for VCC, GND, A-phase (CLK), B-phase (DT) and independent switch (SW), eliminating the need for complex peripheral circuits. The 2.54mm pin pitch is compatible with common PCB design specifications, simplifying layout and wiring work. Compared with traditional analog potentiometers, its digital output avoids signal drift and noise interference, reducing post-processing workload for the main control chip and significantly lowering system development difficulty.