TCST2103 Transmissive Optical Sensor – Phototransistor Output – Vishay

The TCST2103 from Vishay Semiconductor Opto Division is a high-precision transmissive (slotted) optical sensordesigned for reliable object detection in encoders, counters, optical switches, and automation systems. This through-hole photo interrupter integrates an infrared LED emitter and a phototransistor detector in a compact slotted housing for accurate and consistent switching performance.

With a 3.1 mm slot width and 1 mm aperture, the TCST2103 ensures excellent optical alignment and high sensitivity. It features fast response times—10 µs turn-on and 8 µs turn-off—making it suitable for high-speed motion detection applications. The built-in daylight blocking filter ensures stable operation by minimizing interference from ambient light.

Operating across a wide temperature range from –55°C to +85°C, and using a 950 nm infrared wavelength, this sensor is ideal for demanding industrial and commercial environments. Its Pb-free, through-hole design ensures ease of integration and long-term reliability.

Key Specifications:

• Manufacturer: Vishay Semiconductor

• Part Number: TCST2103

• Type: Transmissive optical (slotted) sensor

• Output Type: Phototransistor

• Slot Width: 3.1 mm

• Aperture Width: 1 mm

• Wavelength: 950 nm IR

• Collector-Emitter Voltage: 70V max

• Forward LED Current: 60mA max

• Collector Current: 4mA typical (100mA max rating)

• Response Time: 10 µs (on), 8 µs (off)

• Operating Temperature: –55°C to +85°C

• Features: Daylight blocking filter, Pb-free, through-hole package

Package Includes:
1 x TCST2103 Transmissive Optical Sensor

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