A1458 Optocoupler Datasheet Jun 2026

The isolation barrier is the primary reason to use the A1458. The datasheet provides the following isolation parameters:

This is the most important table in any . Exceeding these values, even briefly, can destroy the device or compromise its isolation.

To get the most out of your A1458, keep these design principles in mind: a1458 optocoupler datasheet

Keep in mind that infrared LEDs lose efficiency (diminish in light output) over decades of continuous use. Design your initial circuit with enough "CTR Margin" (e.g., planning for 50% of the rated CTR) to ensure longevity.

Whether you are designing a switched-mode power supply (SMPS), a microcontroller interface for industrial controls, or a noise-sensitive audio system, finding a reliable is your first step toward a successful design. This article consolidates all the critical technical data, application notes, and comparative analysis you need. The isolation barrier is the primary reason to use the A1458

| Rank | CTR Min (%) | CTR Max (%) | Conditions | |------|-------------|-------------|-------------| | A | 50 | 150 | I_F = 5 mA, V_CE = 5V, Ta=25°C | | B | 80 | 240 | I_F = 5 mA, V_CE = 5V, Ta=25°C | | C | 130 | 400 | I_F = 5 mA, V_CE = 5V, Ta=25°C | | D | 200 | 600 | I_F = 5 mA, V_CE = 5V, Ta=25°C |

For standard optocouplers like the A1458, the CTR can range anywhere from depending on the specific bin/grade. To get the most out of your A1458,

Note: This is a developer-generated technical text based on standard optocoupler specifications (similar to 4N35, PC817, or MOC302x families). For a real A1458, please check the manufacturer’s official datasheet.

: Provides isolation for power transistor gates (MOSFET/IGBT) to protect control circuitry from high-voltage spikes. Computing & Data

$$CTR = \fracI_CI_F \times 100%$$