SFH313FA-2/3 Phototransistor; THT; 200mW; 5mm; λp max: 870nm; 70V; 10°; 0.55mm

The SFH313FA-2/3 is a high-sensitivity silicon NPN phototransistor designed for infrared detection in a variety of industrial and consumer applications. Housed in a standard 5mm (T1 3/4) plastic package, this component is optimized for through-hole technology (THT) mounting, providing a secure and reliable connection to any printed circuit board. One of the defining characteristics of the SFH313FA series is its black epoxy resin mold, which acts as a daylight filter. This specialized filter is designed to block out visible light while remaining highly transparent to infrared radiation, specifically peaking at a wavelength of 870nm. This feature is crucial for applications operating in environments with significant ambient light interference, as it ensures that the phototransistor only responds to the intended IR signals. With a power dissipation rating of 200mW and a collector-emitter voltage of 70V, this device is robust enough for demanding electronic circuits.

Precision is a key attribute of the SFH313FA-2/3, evidenced by its narrow viewing angle of just 10 degrees. This directional sensitivity allows for highly targeted light detection, making it an excellent choice for light barriers, optical encoders, and remote control receivers where cross-talk from neighboring IR sources must be minimized. The narrow half-angle ensures that the phototransistor is sensitive to light coming from a specific direction, which enhances the accuracy of position sensing and object detection systems. The device features a high collector current and low saturation voltage, which facilitates easy interfacing with microcontrollers and logic circuits. Whether you are designing a safety curtain for industrial machinery or a simple proximity sensor for a consumer device, the SFH313FA-2/3 provides the optical precision and electrical reliability required to ensure consistent performance under various operating conditions.

In terms of spectral response, the SFH313FA-2/3 is perfectly matched with infrared emitters operating in the 850nm to 950nm range, making it a versatile partner for many standard IR LEDs. The 870nm peak sensitivity is ideal for high-speed data transmission and sensitive detection tasks. Its fast switching times allow it to be used in applications requiring high-frequency modulation, such as infrared data links or complex optical counting systems. The rugged construction of the 5mm package ensures that the internal silicon chip is protected from moisture and mechanical stress, contributing to a long operational life. For engineers working on outdoor equipment or devices used in brightly lit indoor spaces, the integrated daylight filter is an indispensable feature that simplifies circuit design by reducing the need for complex external optical shielding or electronic filtering techniques.

The SFH313FA-2/3 is a part of a broader ecosystem of optoelectronic components that drive modern automation. By utilizing LSI keywords such as spectral sensitivity, radiant sensitive area, and collector-emitter breakdown voltage, we can see how this phototransistor fits into the high-tech landscape of optical sensing. The through-hole design is particularly advantageous for applications that may experience mechanical vibration, as the soldered leads provide a much stronger physical bond than typical surface-mount components. Furthermore, the 5mm form factor is a global standard, ensuring that this phototransistor can be used as a drop-in replacement in many existing designs. Its high sensitivity and low dark current make it particularly effective in low-light conditions, where every photon counts for accurate signal processing. This makes it a reliable choice for security systems and long-range infrared communication links.

When it comes to sourcing high-quality optoelectronics, the SFH313FA-2/3 represents a balance of performance, durability, and cost-effectiveness. The manufacturing process for these phototransistors ensures high consistency between batches, which is vital for production environments where uniformity is required for system calibration. The device's ability to operate across a wide temperature range makes it suitable for both commercial and industrial grade products. By choosing a component with a built-in daylight filter, designers can achieve a higher signal-to-noise ratio, leading to more robust and error-free operation of their infrared systems. The SFH313FA-2/3 is not just a sensor; it is a precision-engineered optical gate that empowers your electronics to see the invisible infrared world with clarity and accuracy, ensuring your project meets the highest standards of modern technology.

Enhance your infrared sensing capabilities today with the SFH313FA-2/3 Infrared Phototransistor. Designed for those who demand precision and reliability, this component is ready to handle your most challenging optical detection tasks. Whether you are building a sophisticated industrial light curtain or a simple IR remote receiver, the SFH313FA-2/3 offers the performance you need to succeed. We provide only genuine, high-quality optoelectronic components to ensure your projects perform exactly as designed. Don't let ambient light interference compromise your system's integrity—choose the phototransistor with the integrated daylight filter. Order now to take advantage of our bulk pricing and fast delivery services. Add the SFH313FA-2/3 to your cart today and see why it is a trusted choice for engineers and manufacturers worldwide. Your success in optical sensing starts with the right phototransistor, and the SFH313FA-2/3 is the ultimate choice for your infrared applications.