MOC7811 Slotted Opto Isolator Module

MOC7811 Slotted Opto Isolator Module enables reliable optical switching and position sensing in embedded and automation projects. Designers use it to detect object movement, measure rotation, and trigger logic-level events without mechanical contact.

Key Features:

• Integrated Emitter and Detector: Infrared LED and phototransistor in a single housing for simplified design.
• Slotted Housing: Detects objects passing through the 3 mm slot for accurate triggering.
• Fast Response Time: Suitable for high-speed sensing in automation and encoder systems.
• Non-Contact Operation: Eliminates mechanical wear and ensures long service life.
• Easy Interfacing: Works with microcontrollers, logic circuits, and transistor drivers.

Technical Specifications:

• Forward Voltage (Emitter): Typically 1.2 V at 20 mA
• Detector Type: Phototransistor, NPN output
• Collector-Emitter Voltage (V_CEO): 30 V max
• Collector Current: 20 mA max
• Slot Width: ~3 mm (nominal)
• Operating Wavelength: ~940 nm (infrared)
• Operating Temperature Range: −25 °C to +85 °C

Mechanical Specifications:

• Package Type: Black plastic slotted housing
• Mounting Style: Through-hole PCB mounting
• Lead Material: Tin-plated copper
• Body Material: Opaque plastic to reduce ambient light interference

Dimensions:

• Overall Height: ~10 mm
• Overall Width: ~6 mm
• Slot Gap: ~3 mm
• Lead Pitch: Standard 2.54 mm

Pinout and Wiring:

• Pin 1: Anode (LED +)
• Pin 2: Cathode (LED −)
• Pin 3: Collector (Phototransistor)
• Pin 4: Emitter (Phototransistor)
• Wiring Note: Drive the LED through a current-limiting resistor. Connect the phototransistor in pull-up or pull-down configuration based on circuit logic.

Datasheet Reference:

• Refer to the official MOC7811 datasheet for detailed electrical characteristics, timing diagrams, and recommended application circuits.

Applications:

• Rotary Encoders: Detect shaft rotation in robotics and automation systems.
• Object Detection: Sense objects passing through the slot for counters and limit switches.
• Position Sensing: Implement non-contact position feedback in mechatronic devices.
• Speed Measurement: Measure wheel or motor speed in embedded applications.

Equivalent Models:

• MOC7810: Similar optical slot sensor with different slot dimensions.
• EE-SX670: Omron slot-type photointerrupter with comparable function.
• GP1A57HRJ00F: Sharp photointerrupter for similar sensing applications.

Package Includes:

• 1 x MOC7811 Slotted Opto Isolator Module