ACPL-P314 Optocoupler

Updated: 2026-08-05

Overview

The ACPL-P314 is a high-speed optocoupler designed to provide reliable signal isolation in industrial applications. It features a GaAsP LED and an integrated photodetector, enabling fast signal transmission while maintaining high noise immunity. This device is particularly suited for environments with high electromagnetic interference (EMI), making it a popular choice in motor control and power inverter systems. The ACPL-P314 is known for its compact design and robust construction, which allows it to perform reliably in harsh conditions. Its high common-mode transient immunity (CMTI) ensures stable operation even in the presence of rapid voltage fluctuations. These characteristics make it a versatile component in automation and industrial control systems.

Structure and Working Principle

The ACPL-P314 consists of an input GaAsP LED and an output photodetector, separated by an isolation barrier. When an electrical signal is applied to the LED, it emits light, which is detected by the photodetector and converted back into an electrical signal. This optical coupling ensures complete electrical isolation between the input and output circuits. The device operates at high speeds, with a typical propagation delay of less than 500 nanoseconds. This makes it suitable for applications requiring rapid signal transmission. The integrated design minimizes external component requirements, simplifying circuit design and reducing board space.

Key Features

The ACPL-P314 offers several key features that make it ideal for industrial applications. Its high-speed performance ensures minimal signal delay, while its high CMTI (typically 15 kV/µs) provides excellent noise immunity. The device also has a wide operating temperature range, from -40°C to 105°C, ensuring reliability in extreme conditions. Additionally, the ACPL-P314 is available in a compact SO-5 package, making it suitable for space-constrained applications. Its low power consumption and high isolation voltage (up to 3750 Vrms) further enhance its appeal for use in power electronics and automation systems.

Application Areas

The ACPL-P314 is widely used in motor control systems, where it provides isolation between control circuits and power stages. It is also commonly employed in power inverters, ensuring safe and reliable signal transmission in high-voltage environments. Automation systems benefit from its fast response time and noise immunity. Other applications include industrial communication interfaces, programmable logic controllers (PLCs), and medical equipment. Its ability to isolate signals while maintaining high-speed performance makes it a versatile component in various industries.

Maintenance and Precautions

To ensure optimal performance, the ACPL-P314 should be operated within its specified ratings. Exceeding the maximum input current or voltage can damage the device. Proper soldering techniques should be followed during installation to avoid thermal stress. Storage conditions should be dry and within the recommended temperature range. Avoid exposing the device to excessive humidity or mechanical stress. Regular inspection of the circuit for signs of wear or damage can help maintain long-term reliability.

B2B Procurement Guide

When procuring ACPL-P314 optocouplers, consider factors such as response time, isolation voltage, and environmental requirements. Verify the supplier's certifications and quality control processes to ensure product authenticity and reliability. Bulk purchases may offer cost savings, but ensure compatibility with your application. Lead times can vary, so plan orders in advance to avoid production delays. Reputable distributors often provide technical support and datasheets to assist with integration.