A1458 Optocoupler Datasheet May 2026

However, based on common optocoupler naming conventions and visual similarities, here are the three most likely components you might be looking for, along with a summary of their datasheets:

Key Features (Summarized from the Datasheet)

• High Isolation Voltage: 5000 Vrms (for 1 minute) – suitable for mains-powered applications.
• Current Transfer Ratio (CTR): Typically 50% to 600% (depending on sub-grade).
• Rise and Fall Time: ~4 µs (typical), allowing for moderate-speed switching.
• Operating Temperature Range: -55°C to +110°C.
• Creepage and Clearance: >7.4mm (meets reinforced insulation standards).

What is the A1458 Optocoupler?

Before we dissect the numbers, let’s understand the anatomy. The A1458 is a phototransistor optocoupler. This means it consists of two primary components housed within a single, light-tight package (usually a DIP-4 or SMD format): a1458 optocoupler datasheet

1. An Infrared Emitting Diode (IRED): This acts as the input. When current flows through this LED, it emits infrared light.
2. A Silicon Phototransistor: This acts as the output. It detects the infrared light from the LED. When the light hits the transistor base, it allows current to flow from the collector to the emitter.

This simple mechanism creates an electrical barrier. The input side controls the output side via light, not copper. Therefore, there is no direct electrical connection between your high-voltage side and your low-voltage logic. However, based on common optocoupler naming conventions and

9. CTR Rank Classification (Optional ordering information)

| Rank | CTR (%) @ IF=5mA, VCE=5V | |------|--------------------------| | A | 50 – 150 | | B | 100 – 300 | | C | 200 – 400 | | D | 300 – 600 | High Isolation Voltage: 5000 Vrms (for 1 minute)

Example order code: A1458-B (CTR rank B)