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LTV-817-A

Transistor optocoupler, 5kV isolation, 80-160% CTR, DIP-4

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Manufacturer Part：

LTV-817-A

Package：

DIP-4 (6.4 x 4.6 x 3.9 mm, through-hole)

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Description

Product Overview

The LTV-817-A from Lite-On is a single-channel transistor output optocoupler in a 4-pin DIP through-hole package. With 5000Vrms isolation voltage, 80-160% current transfer ratio (CTR), and 4us response time, it provides reliable signal isolation for industrial control and power supply feedback applications.

Key Specifications

Channels 1
CTR (A Grade) 80% to 160% @ IF=5mA, VCE=5V
Isolation Voltage 5000 Vrms
Collector-Emitter Voltage 35 V
Forward Voltage 1.2V typical @ IF=20mA
Collector Current 50 mA max
Forward Current 50 mA max
Response Time (rise) 4 us typical
VCE(sat) 0.1V typical @ IC=1mA, IF=20mA
Operating Temperature -30 to +110 C
Package DIP-4
Certifications UL, CSA, VDE, FIMKO, NEMKO, DEMKO, SEMKO

Features

  • Single-channel transistor output optocoupler
  • 5000Vrms high isolation voltage
  • 80-160% CTR (A grade)
  • 4us fast response time
  • Low VCE(sat): 0.1V typical
  • Multiple safety certifications (UL, VDE, etc.)
  • DIP-4 through-hole package
  • Pin-compatible with PC817A

Applications

  • Switching power supply feedback
  • Industrial control signal isolation
  • Programmable logic controller I/O
  • Appliance control circuits

The LTV-817-A from Lite-On is a single-channel transistor output optocoupler in a 4-pin DIP through-hole package. The A suffix denotes the A-grade CTR range of 80% to 160% at IF=5mA, VCE=5V. The device couples an infrared LED on the input side to a phototransistor on the output side through an optically transparent isolation barrier rated at 5000Vrms. The 80-160% CTR provides adequate signal transfer for common feedback and isolation applications. The 4us response time and 0.1V low VCE(sat) make it suitable for switching power supply optocoupler feedback loops. The LTV-817-A is pin-compatible with the industry-standard PC817A, offering a second-source alternative with equivalent performance.

The LTV-817-A operates through three subsystems: (1) Input LED: An infrared GaAs LED emits light when forward current (IF) flows through it. The typical forward voltage is 1.2V at IF=20mA. The LED can be driven from DC, AC (with a reverse-parallel diode), or pulsed sources. The maximum continuous forward current is 50mA. (2) Isolation Barrier: A transparent dielectric provides optical coupling between the LED and phototransistor while maintaining 5000Vrms electrical isolation. This galvanic isolation protects the low-voltage side from high-voltage transients and breaks ground loops in mixed-signal systems. (3) Output Phototransistor: A silicon NPN phototransistor detects the LED emission and generates a collector current proportional to the LED current. The ratio of output current to input current is the Current Transfer Ratio (CTR), specified as 80% to 160% for the A-grade. The phototransistor operates with VCE up to 35V and collector current up to 50mA. The VCE(sat) of 0.1V at IC=1mA provides low output voltage in saturation.

Pin Name Type Description
1 Anode Input LED anode (input side)
2 Cathode Input LED cathode (input side)
3 Emitter Output Phototransistor emitter
4 Collector Output Phototransistor collector
  • Switching power supply optocoupler feedback with 5000V isolation and 80-160% CTR
  • Industrial PLC digital input isolation with UL/VDE safety certifications
  • Appliance control signal coupling with 4us response time and 50mA output current
  • Ground loop elimination in mixed-signal systems with 5kV galvanic isolation
Model Manufacturer CTR Isolation Notes
PC817A Sharp 80-160% 5000V Industry standard equivalent
LTV-817-B Lite-On 130-260% 5000V Higher CTR grade
LTV-817-C Lite-On 200-400% 5000V Highest CTR grade
4N35 Vishay 100% 5300V 6-pin base access
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

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If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

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5. Sourcing for Special Components

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6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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