1458 Optocoupler Datasheet (2025)

The following specifications represent the typical characteristics of the (and similar 4-pin DIP optocouplers like the PC817, which shares a nearly identical footprint and application).

To fully leverage the high isolation capabilities of the 1458 optocoupler, strict adherence to PCB safety layout practices is required:

is a hermetically sealed, high-gain optocoupler designed for reliable signal isolation. It combines a GaAsP LED with an integrated high-gain photodetector to provide electrical insulation between input and output circuits. Key Specifications & Features 1458 optocoupler datasheet

To secure high-speed performance and noise suppression, a 0.1 µF ceramic bypass capacitor must be placed as close as possible between the output power supply pins ( VCCcap V sub cap C cap C end-sub and GND, pins 8 and 5).

: Optimizes propagation delays to a maximum threshold of The Arduino remains electrically isolated from the 12V

In this setup, when the Arduino sends a HIGH signal, the internal LED lights up. The phototransistor detects this light and closes the circuit, allowing the 12V current to flow through the relay. The Arduino remains electrically isolated from the 12V circuit.

) yield faster rise times at the cost of higher power consumption. Higher values (e.g., 4.7 ) conserve energy but lengthen propagation delays. 1458 optocoupler datasheet

| Parameter | Symbol | Rating | Unit | |-----------|--------|--------|------| | Forward current (input) | ( I_F ) | 50 | mA | | Peak forward current (1 µs pulse, 300 pps) | ( I_FP ) | 1 | A | | Reverse voltage (input) | ( V_R ) | 6 | V | | Collector-emitter voltage (output) | ( V_CEO ) | 35 | V | | Emitter-collector voltage | ( V_ECO ) | 6 | V | | Collector current | ( I_C ) | 50 | mA | | Collector power dissipation | ( P_C ) | 150 | mW | | Total power dissipation | ( P_tot ) | 200 | mW | | Isolation voltage (1 minute) | ( V_ISO ) | 5000 | Vrms | | Operating temperature | ( T_opr ) | -55 to +110 | °C | | Storage temperature | ( T_stg ) | -55 to +125 | °C | | Soldering temperature (10 sec) | ( T_sol ) | 260 | °C |

HCPL-1458 Optocoupler Datasheet: High-Speed Low-Voltage Isolation

If your part is an 8-pin SOIC or DIP high-speed logic gate optocoupler, this is the component you need. Manufacturer: Avago Technologies / Broadcom Key Features:

When reading the datasheet for a standard transistor optocoupler, these are the critical parameters you need to check to ensure it fits your circuit.