Surface Mount Rotary Encoder - EC11J

For projects that need a rotary encoder but require a single-sided design or need to avoid interrupting traces or devices on the other side, the Surface Mount Rotary Encoder EC11J is an excellent choice. This high-quality 30-detents encoder from Alps features a smooth bushing suitable for mounting in an enclosure.

The encoder includes a built-in push-button allowing the knob to be pressed to close a separate switch. It features a 3-pad connector (ground and two coding pins) on one side and two pads for a normally open switch on the other. The encoder also has 6 large mechanical pads for a robust physical connection, recommended to be used with a ground plane for mechanical stability.

Unlike potentiometers, this rotary encoder rotates continuously with 30 distinct segments, each providing a tactile 'click'. Movement clockwise or counter-clockwise changes the two switches' states, enabling microcontrollers to count rotation increments. The current position is not directly readable; thus, microcontroller tracking is necessary. For absolute position detection, consider using a potentiometer instead.

Features:

• 30 detents with a clicky feel
• Integrated push-button switch
• Single-sided SMT design
• Smooth bushing for enclosure mounting
• Robust mechanical pads for secure soldering
• Alps high-quality rotary encoder

Technical Specifications:

• 15mm long flat shaft
• 30 detents
• Press-switch travel: 1.5mm
• Operating life: 100,000 cycles
• Operating temperature range: -40℃ to +85℃
• Electrical rating: 10mA 5V DC
• Output signal: A, B, 2-phase output
• Max/min operating current (resistive load): 10mA / 1mA
• Insulation resistance: 100MΩ min. (250V DC)
• Withstand voltage: 300V AC for 1 minute or 360V AC for 1s
• Detent torque: 12±5mN·m (initial), 10±4mN·m (after reflow)
• Shaft push and pull strength: 100N
• Journey: 0.5±0.3mm
• Action force: 5±2N

Download Datasheet (PDF)

Note: Knob is not included but can be purchased separately.