Introduction to EL814S(A)(TU) Transistor Output Optocouplers

The Transistor Output Optocouplers EL814S(A)(TU) by Everlight are compact, high-isolation components designed to provide safe electrical separation between input and output circuits. As part of the Optoelectronics family, these optocouplers ensure noise immunity, signal integrity, and reliable switching performance.

Widely used in industrial and consumer electronics, they stand out within the Optocouplers / Photocouplers category and specifically within Transistor Output Optocouplers. You can purchase this device globally from www.xonelec.com, trusted by engineers through x-on electronics.

Technical Specifications of EL814S(A)(TU)

• Manufacturer: Everlight

• Part Number: EL814S(A)(TU)

• Category: Optoelectronics, Optocouplers / Photocouplers, Transistor Output Optocouplers

• Input Type: Infrared LED

• Output Type: NPN transistor

• Isolation Voltage: 5000 Vrms

• CTR (Current Transfer Ratio): Various ranges depending on model

• Package: 4-pin DIP

• Operating Temperature: –55°C to +110°C

• Applications: Power supply feedback, signal isolation, industrial interfaces

This device is engineered to provide long-term electrical isolation and dependable switching.

Key Features of EL814S(A)(TU) Optocouplers

• High isolation voltage for safety-critical designs

• Stable CTR across temperature variations

• Low power LED input

• Industry-standard DIP-4 package

• Excellent noise immunity for industrial environments

These qualities make it a reliable choice across the Optoelectronics and Transistor Output Optocouplers categories.

Applications of EL814S(A)(TU) by Everlight

These optocouplers are commonly used in:

• Switched-mode power supplies (SMPS)

• PLC and industrial control inputs

• Microcontroller signal isolation

• AC/DC converters

• Communication interfaces

• Home appliance control boards

As versatile members of the Optocouplers / Photocouplers family, they support high-performance electrical insulation.

Wiring and Connection Overview

To ensure optimal performance of the EL814S(A)(TU) Optocoupler, follow these guidelines:

• Connect the LED input with proper forward current limiting

• Ensure the transistor output is biased correctly

• Maintain safe clearance distances on PCB for high isolation

• Avoid reversing LED polarity during installation

• Use noise-filtering capacitors when required

These practices ensure reliable and consistent operation in isolated circuits.

Use Case Scenario: Feedback in a Switched-Mode Power Supply

Scenario: A power supply designer required a compact, reliable isolation component for primary-to-secondary feedback.
Problem: Noise fluctuations were causing unstable feedback signals.
Solution: The EL814S(A)(TU) Transistor Output Optocoupler provided stable CTR and excellent noise immunity.
Result: Enhanced performance, steady voltage regulation, and long-term system reliability.

This highlights the importance of high-quality Transistor Output Optocouplers in power systems.

Download Datasheet for EL814S(A)(TU)

Access electrical characteristics, CTR curves, and mechanical drawings:

Download EL814S(A)(TU) Datasheet

Why Buy from XON Electronics?

Choose xon electronics for genuine Optoelectronics components by Everlight:

• 100% original parts

• Shipping to USA, India, Australia, Europe & worldwide

• Bulk and OEM order support

• Competitive pricing with fast delivery

• Reliable sourcing through www.xonelec.com

Order today and enjoy dependable service.

FAQ – EL814S(A)(TU) Optocouplers

Q1. What isolation voltage does it provide?
5000 Vrms.

Q2. What type of output transistor does it use?
An NPN transistor.

Q3. Is it suitable for power supply feedback?
Yes, widely used in SMPS designs.

Q4. What package is used?
Standard DIP-4.

Q5. Can I buy it globally?
Yes, through www.xonelec.com.

Conclusion

The EL814S(A)(TU) Transistor Output Optocouplers by Everlight deliver stable, safe, and noise-resistant signal isolation for industrial and commercial systems. As part of the Optoelectronics, Optocouplers / Photocouplers, and Transistor Output Optocouplers categories, they offer exceptional reliability and value.
Purchase them at www.xonelec.com with international delivery to USA, India, Australia, Europe, and more.

Precision Detection: ITR1205ST11A/TR Optical Switches by Everlight

The Optical Switches, Transmissive, Phototransistor Output ITR1205ST11A/TR by Everlight are compact, high-reliability reflective sensors designed for non-contact object detection in embedded and automation applications. With their transmissive type sensing and phototransistor output, these devices deliver fast, accurate switching in space-constrained environments.

In this blog, we’ll explore their specifications, standout features, applications, wiring layout, and purchasing options at Xon Electronics. If you need dependable Sensors, Optical Sensors, Optical Switches, Optical Switches, Transmissive, Phototransistor Output by Everlight, this model is a top-tier choice.

Technical Specifications of ITR1205ST11A/TR

• Manufacturer: Everlight

• Part Number: ITR1205ST11A/TR

• Type: Optical Switch, Transmissive, Phototransistor Output

• Sensing Method: Transmissive (Slot Type)

• Slot Width: 5mm

• Output Type: Phototransistor

• Peak Wavelength: 940nm (Infrared)

• Mounting Type: Surface Mount (SMD)

• Operating Voltage: 5V typical

• Package: Tape and Reel

• Category: Sensors, Optical Sensors, Optical Switches, Optical Switches, Transmissive, Phototransistor Output by Everlight

This compact SMD package is ideal for high-density PCBs where speed and accuracy are essential.

?? Key Features of ITR1205ST11A/TR Optical Sensor

• Transmissive Slot Design (5mm) – Ensures precise object detection

• Infrared Emitter (940nm) – Stable performance in varied lighting conditions

• Phototransistor Output – Enables easy integration with digital circuits

• Surface Mount Package – Space-saving and suitable for automated production

• Reliable Response Time – Fast signal switching for real-time applications

These features make the ITR1205ST11A/TR Optical Switches, Transmissive, Phototransistor Output by Everlight ideal for embedded sensor applications and compact electronic designs.

Applications of ITR1205ST11A/TR Optical Switches

Engineers and designers use ITR1205ST11A/TR Optical Switches, Transmissive, Phototransistor Output by Everlight across various industries, including:

• Vending and Ticketing Machines

• Printer Paper Jam Detection

• Consumer Electronics (Disc Drives, Game Consoles)

• Robotic Positioning Systems

• Industrial Automation Equipment

• Optical Encoders and Feedback Mechanisms

These Sensors, Optical Sensors, Optical Switches, Optical Switches, Transmissive, Phototransistor Output by Everlight are favored for their compact form, low power consumption, and reliable switching accuracy.

Wiring & Connection Overview

Typical connection setup:

[Infrared Emitter] ? Forward Current via Resistor from VCC

[Phototransistor Output] ? Collector to VCC / Emitter to Ground

Output Signal ? Digital Logic Input (Microcontroller, Comparator, etc.)

This setup ensures clean digital output suitable for most logic-level circuits.

Use Case Scenario: Paper Feed Detection in Compact Printers

Scenario: A printer manufacturer needed a miniature optical sensor to detect paper insertion and jams.
Problem: Limited PCB space and high detection reliability were essential.
Solution: The ITR1205ST11A/TR Optical Switches, Transmissive, Phototransistor Output by Everlight offered compact SMD packaging and dependable transmissive sensing.
Result: Improved feed accuracy, reduced false detection, and lower failure rates.

This case showcases how Sensors, Optical Sensors, Optical Switches, Optical Switches, Transmissive, Phototransistor Output by Everlight enhance product quality and reliability.

Download Datasheet for ITR1205ST11A/TR

Need detailed dimensions, specs, or electrical characteristics?

Download ITR1205ST11A/TR Datasheet from Xon Electronics

Why Buy from Xon Electronics?

Get your original Sensors, Optical Sensors, Optical Switches, Optical Switches, Transmissive, Phototransistor Output by Everlight from Xon Electronics:

• 100% Genuine Everlight Components
• Worldwide Shipping – USA, India, Australia, Europe & more
• OEM & Volume Pricing Available
• Full Technical Documentation Support
• Safe & Fast Online Ordering

Order now at www.xonelec.com and power your detection systems with Everlight reliability.

Conclusion

The ITR1205ST11A/TR Optical Switches, Transmissive, Phototransistor Output by Everlight offer a compact, energy-efficient, and highly reliable sensing solution for embedded applications. From industrial automation to consumer electronics, these Sensors, Optical Sensors, Optical Switches, Optical Switches, Transmissive, Phototransistor Output by Everlight are trusted worldwide. Available now at Xon Electronics with shipping to the USA, India, Australia, Europe, and other countries.

FAQs – ITR1205ST11A/TR Optical Switch by Everlight

Q1. What is the slot width of the sensor?
It features a 5mm transmissive slot.

Q2. What kind of output does it provide?
It uses a phototransistor output suitable for digital signal processing.

Q3. Is it suitable for SMD mounting?
Yes, it comes in a surface-mount package ideal for automated assembly.

Q4. Can it be used in daylight environments?
Yes, the IR wavelength helps it perform reliably in various lighting conditions.

Q5. Where can I buy it globally?
You can purchase the ITR1205ST11A/TR Optical Switches, Transmissive, Phototransistor Output by Everlight from www.xonelec.com with shipping to USA, India, Australia, Europe, and more.

Infrared radiations or infrared light are that category of electromagnetic radiations whose wavelength is longer than that of visible light. Thus these radiations can't be seen through human eyes. Most of the thermal radiation which is radiated by materials present at room temperature is infrared. Like all other electromagnetic radiation, infrared radiations also come with radiant energy and carry on both like a quantum particle (photon) as well as a wave

Infrared radiation was founded by Sir William Herschel in 1800. It was also known that marginally the greater part of the total vitality from the Sun was inevitably found to land on Earth as infrared. The balance between emitted and absorbed infrared radiation critically affects Earth's atmosphere.

Infrared radiation has found its use in scientific, law enforcement, industrial, medical, and military applications. The gadgets with night vision that utilizes dynamic close infrared brightening offer animals and people to be seen without the observer being recognized. The thermal imaging cameras having an infrared feature helps in finding out the loss of heat in insulated systems, to know which electrical equipment is getting overheated as well as to watch changing bloodstream in the skin. Civilians and military use infrared radiations for night vision, tracking, homing, surveillance and target acquisition.

The transmission of infrared radiation is possible only because of 2 components. One is the infrared emitter and the other one is the infrared receiver. This blog is all about Infrared Emitter. So let’s move forward for it.

Infrared Emitters

A clear line of sight is required for an infrared signal in order to work. If you are turning the face of an infrared remote control in the direction opposite to that of the equipment that needs to receive its signal then there is a high possibility that nothing is going to happen. The transmission of the signal is not going to be an effective one. To solve the above-mentioned problem, all the infrared system utilizes local infrared emitters. Basically, an infrared emitter is referred to as a remote control that is located in front of the gadget that you are using. It is associated with our control framework by a wire.

Placement of Infrared Emitter

You must place the infrared emitter on the front side of the gadget that you want to operate. It is also advisable to keep your infrared emitter just above the infrared receiver to support reliable functioning. If you are not able to get the exact location of your infrared receiver then you need to move the infrared emitter around while testing the remote to locate the best possible spot to mount it.

The acceptance signal is interfered due to strong sunlight. If you are placing it at a position with mini-mum exposure to sunlight, you will get the best result. When you are summing up to more than one infrared emitter to the infrared output, the strength of the infrared signal gets decreased with each addition. Thus, you must place infrared emitter at its proper spot.

This was all we have regarding Infrared Emitters. Hope you enjoyed going through the article. Brands that manufacture them are Everlight, Vishay and TT Electronics. Make sure to visit them using the links as provided. Thanks for reading.

View all our Infrared Emitter

Infrared radiations or infrared light are the categories of electromagnetic radiations whose wavelength is longer than that of visible light. Thus these radiations can't be seen through human eyes. Most of the thermal radiation which is radiated by materials present at room temperature is infrared. Like all other electromagnetic radiation, infrared radiations also come with radiant energy and carry on both like a quantum particle (photon) as well as a wave.

Infrared radiation was founded by Sir William Herschel in 1800. It was also known that marginally the greater part of the total vitality from the Sun was inevitably found to land on Earth as infrared. The balance between emitted and absorbed infrared radiation critically affects Earth's atmosphere.

Infrared radiation is absorbed and emitted by molecules when their vibrational and rotational movements are changed. Because of the change in the dipole moment, the vibrational modes in a molecule gets excited, making it a valuable recurrence run for investigation of these vitality states for atoms of the best possible evenness. Infrared spectroscopy helps in examining the transmission and absorption of photons in the range of the infrared spectrum.

Infrared radiation has found its use in scientific, law enforcement, industrial, medical, and military applications. The gadgets with night vision that utilizes dynamic close infrared brightening offer animals and people to be seen without the observer being recognized. The thermal imaging cameras having an infrared feature helps in finding out the loss of heat in insulated systems, to know which electrical equipment is getting overheated as well as to watch changing bloodstream in the skin. Infrared astronomy utilizes telescopes equipped with sensors to get into dusty regions present in space like the molecular clouds, find out substances like planets, and to get a good view of highly red-shifted objects from the initial days of the galaxy. Civilians and military use infrared radiations for night vision, tracking, homing, surveillance and target acquisition.

The transmission of infrared radiation is possible only because of 2 components. One is the infrared emitter and the other one is the infrared receiver. This blog is all about Infrared Receiver. So let’s move forward for it.

Infrared Receiver

A clear line of sight is required for an infrared signal to work. If you are turning the face of an infrared remote control in the direction opposite to that of the equipment that needs to receive its signal then there is a high possibility that nothing is going to happen. The transmission of the signal is not going to be an effective one. To solve the above-mentioned problem, all the infrared system utilizes local infrared emitters. An infrared emitter is referred to as a remote control that is located in front of the gadget that you are using. It is associated with our control framework by a wire.

It is important to have an infrared receiver along with an infrared emitter. An infrared radiation receiver or an infrared receiver is hardware that helps in sending information to some other device from an infrared remote control by decoding and receiving the signals. It is advisable to keep your infrared receiver just below the infrared receiver to support reliable functioning.

This was all we have regarding the infrared receiver. Brands that manufacture them are Everlight, Vishay and Sharp. Make sure to visit them using the links as provided.

View all our Infrared Receiver

LED is a light-producing semiconductor which discharges light when electric current moves through it. The electrons present in the semiconductor get attached with electron holes and release photons (energy). The shade of the light is dictated by the vitality required for electrons to overcome the bandgap of the semiconductor. White light can be generated by a film of a light-emitting phosphor on the device.

The earliest LEDs, which was developed in around 1962, used to emit infrared lights of low intensity. Infrared LEDs have found its use mostly in remote control circuits which can be found in equipment linked with consumer electronics. Modern LEDs come with ultraviolet, infrared and visible wavelengths with the high light output.

LEDs have several advantages over an incandescent light. They are:

• Long Lifetime
• Small Size
• Fast switching
• Improved physical robustness

LEDs have found its use in automotive headlamps, traffic signals, plant growing light, aviation light, medical devices, lighted wallpaper, camera flashes, plant growing light, and advertising.

In contrast with a laser, the light that is released from an LED is neither highly monochromatic nor spectrally coherent. Still, its spectrum is adequately narrow that it can be recognized by the human eye as a saturated color.

Standard LEDs – Through Hole

LEDs are available in several different sizes and shapes. The category of LEDs that you will be using most is the through-hole LEDs with 2 legs. There are multiple LEDs that are hard and small to solder but these are simple and easy to use along with a breadboard provided that are available with long wires you can stick in. The light emitter is defended by a clear bulb. Consistently, through-hole LEDs have overwhelmed the market of high-brilliance LEDs, in light of their exceptionally intelligent structure with essential optics.

LED lamps or through-hole LEDs have mostly found its use in outdoor applications as they provide multiple benefits over standard surface mount (SMT) LEDs. Let's have a look at some of the characteristic feature of Through-Hole LEDs:

• They are brighter.
• They are very clear.
• They are available either as tint-diffused or tinted for higher contrast ratios.
• They have a diverse range of essential optic design.

Due to the availability of primary optics, LED lamps or through-hole LEDs are considered as one of the best choices regarding definition, brightness, and controlled viewing angles.

This was all we have regarding through-hole LEDs. Hope you enjoyed going through the blog. Brands that manufacture them are Everlight, Lumex, and Kingbright. Make sure to follow them using the links as provided. Thank you for reading.

View all our Standard LEDs – Through Hole