TCRT5000L Reflective IR Sensor Photoelectric Switch

TCRT5000L Reflective IR Sensor Photoelectric Switch is a high-precision optical sensor that combines an infrared emitter and a phototransistor in a single leaded package to detect the presence of objects or surfaces. This compact device utilizes a daylight blocking filter to minimize interference from ambient light, ensuring reliable detection in various environment conditions. Consequently, it excels at identifying transitions between reflective and non-reflective surfaces, such as black and white lines. Furthermore, the TCRT5000L features a long-lead design, which provides greater flexibility during PCB mounting compared to standard versions. Therefore, you can effectively implement this sensor in robotics and industrial automation projects where space-saving and accuracy remain paramount.

Key Features:

• Integrated Construction: The unit houses both an IR emitting diode and a NPN phototransistor in a compact, leaded plastic package.
• Ambient Light Rejection: It incorporates a built-in daylight blocking filter, which significantly improves the signal-to-noise ratio by ignoring visible light.
• Extended Lead Version: The “L” suffix denotes long leads, allowing for taller mounting profiles or specialized positioning away from the PCB surface.
• Optimal Sensing Distance: Designed specifically for short-range detection, it achieves peak performance at a distance of approximately 2.5 mm.
• High Sensitivity: The phototransistor output delivers a high current transfer ratio, enabling easy interfacing with microcontrollers and logic gates.

Technical Specifications:

• Operating Wavelength: 950 nm (Infrared)
• Peak Operating Distance: 2.5 mm
• Operating Range: 0.2 mm to 15 mm
• Forward Current (Emitter): 60 mA maximum
• Reverse Voltage (Emitter): 5 V
• Collector-Emitter Voltage (Detector): 70 V
• Collector Current (Detector): 100 mA
• Operating Temperature: −25°C to +85°C

Mechanical Specifications:

• Package Style: Leaded (Through-hole)
• Sensor Technology: Reflective Optical (Photointerrupter)
• Housing Material: Polycarbonate with infrared transparency
• Lead Frame: Tinned Copper for high conductivity and ease of soldering.

Dimensions:

• Sensor Body Height: ≈ 7.0 mm
• Sensor Body Width: ≈ 10.2 mm
• Sensor Body Depth: ≈ 5.8 mm
• Lead Length: ≈ 25.0 mm (Long lead version)
• Pin Pitch: ≈ 2.54 mm

Pinout and Wiring:

• Pin 1 (Anode): Connect to the positive supply via a current-limiting resistor for the IR LED.
• Pin 2 (Cathode): Connect to the circuit ground (GND).
• Pin 3 (Collector): Connect to the microcontroller input pin with a pull-up resistor (typically 10 kΩ).
• Pin 4 (Emitter): Connect to the circuit ground (GND).
• Wiring Note: However, ensure the current through the IR LED does not exceed the rated 60 mA to prevent premature component failure.

Datasheet Reference:

• Download Vishay TCRT5000L Reflective IR Sensor Datasheet

Commonly Used in:

• Line Following Robots: Providing the primary input for black and white line detection on track surfaces.
• Rotary Encoders: Detecting slots in a disk to measure RPM or angular position in motor control.
• Paper Sensors: Used in printers and fax machines to detect paper presence or edge alignment.

Applications:

• Proximity Switching: Acting as a non-contact limit switch for moving mechanical parts.
• Object Counting: Tallying items on a conveyor belt by detecting reflected infrared light.
• Security Systems: Serving as a tamper-detection sensor for enclosure lids or doors.

Equivalent Models:

• TCRT5000: The standard lead length version, which is functionally identical in every other aspect.
• ITR9909: A similar reflective optical sensor from Everlight with comparable sensing range and voltage ratings.
• OPB704: An alternative reflective sensor designed by OPTEK for industrial sensing applications.

Package Includes:

• 1 x TCRT5000L Reflective IR Sensor Photoelectric Switch (Long Lead Version)