A1458 Optocoupler Datasheet ((full)) Jun 2026

The is one of the most important specifications in any optocoupler datasheet. It is defined as the ratio of the output transistor's collector current to the input LED's forward current, expressed as a percentage. A CTR of 15% to 30% means that for a given input current, the output will sink a current that is 15% to 30% of that value. This is a key parameter for ensuring the optocoupler can properly drive the input of the following logic gate or microcontroller.

In the world of electronics, protecting sensitive control circuits from high-voltage spikes is a top priority. One of the most reliable ways to achieve this isolation is through an optocoupler. While many engineers are familiar with the standard 4N25 or PC817 series, the (often part of the HCPL-1458 or similar proprietary series) is a specialized component designed for specific industrial and signal-processing tasks.

Links the feedback loop from the secondary regulated output back to the primary PWM controller while keeping the dangerous mains voltage isolated. a1458 optocoupler datasheet

Eradicates ground loop noise in sensitive audio, data transmission, and medical monitoring systems. Design Example: Interfacing a 5V MCU to a 24V Load

Assuming a 5V microcontroller output and a desired forward current ( IFcap I sub cap F ) of 15 mA: The is one of the most important specifications

Before trusting the A1458 datasheet, perform this 30-second test:

The A1458 optocoupler, primarily realized as the Avago/Broadcom , is a cornerstone component for any engineer needing robust, high-speed electrical isolation. Its datasheet reveals a device engineered for performance, combining a fast GaAsP LED with a high-gain photodetector to achieve data rates of up to 15 Mbps , isolation ratings of 3750 Vrms , and wide -40°C to +100°C operation. This is a key parameter for ensuring the

The component arrives across multiple surface-mount and through-hole packaging form-factors: