1458 Optocoupler Datasheet -

The first page tells you the physical format. Look for:

) is a high-performance, hermetically sealed optocoupler designed for high-speed digital isolation in demanding environments. Type: High-speed logic gate optocoupler. Key Specs: Speed: Typically 10 MBd (megabaud).

Isolation Voltage: Standard models offer around 1500V to 5300Vrms isolation.

Common Mode Rejection (CMR): High immunity to noise transients (often >50 kV/µs). Supply Voltage: Wide range, often 3.0V to 5.5V.

Packaging: Commonly found in DIP-8, DIP-16, or SOP-8 packages, sometimes with hermetic sealing for military or aerospace use.

Datasheet: You can find technical specifications on distributor sites like Alldatasheet or the manufacturer’s product page. 2. Other Components with "1458"

Because "1458" is a very common part number, ensure you aren't actually looking for one of these: MC1458 Dual Op-Amp Go to product viewer dialog for this item. 1458 optocoupler datasheet

: One of the most famous chips with this number. It is a dual version of the classic 741 operational amplifier, used for general-purpose analog signal processing. LTC1458 12-Bit DAC

: A quad 12-bit digital-to-analog converter from Analog Devices. Its datasheet mentions an "optocoupler interface," which might be why it appeared in your search. Quick Verification Checklist: Does your part have 8 or 16 pins? (Likely the HCPL-1458 optocoupler Is it used for analog signal gain in a circuit? (Likely the MC1458 op-amp Is it in a larger SO-28 package? (Likely the LTC1458 DAC

Which of these specific 1458 components are you building into your project? AI responses may include mistakes. Learn more MC1458 - STMicroelectronics

The term "1458 optocoupler" usually refers to the HCPL-1458, a high-speed, hermetically sealed optocoupler featuring a 5300 Vrms isolation voltage and 50 kV/µs common-mode transient immunity. It is often confused with the MC1458/LM1458, which is a dual operational amplifier rather than an isolator. View technical details at UTSOURCE. MC1458 - STMicroelectronics

This table is non-negotiable. Exceed these values, and you release the magic smoke.

| Parameter | Symbol | Typical Value (4N35) | | :--- | :--- | :--- | | Forward Current (LED side) | IF | 60 mA | | Reverse Voltage (LED) | VR | 6 V | | Collector-Emitter Voltage | VCEO | 30 V | | Emitter-Collector Voltage | VECO | 7 V | | Power Dissipation (Output) | PC | 150 mW | | Operating Temperature | TOPR | -55°C to +100°C | The first page tells you the physical format

Expert Note: If your "1458 optocoupler" has a VCEO lower than 30V, it is not suitable for motor drives. If it is higher (e.g., 70V), it is likely a high-voltage variant like the 4N36.

Microcontroller to 24V PLC Input Isolation:

If the user needs an optocoupler and mistakenly searched for "1458," here are correct alternatives:

| Application | Recommended Part | Key Feature | |-------------|------------------|--------------| | General purpose, low speed | 4N35, PC817 | Cheap, CTR ≥ 100% | | High CTR (> 500%) | CNY17-4 | Can be driven from µA currents | | High speed (1 Mbit/s) | 6N137 | Logic output, t_pd < 100 ns | | Dual channel, high voltage | HCPL-2531 | Two independent optocouplers | | Zero-crossing SSR trigger | MOC3063 | Triac driver output |

How do you actually use this? Here is a classic example of interfacing a 5V microcontroller with a 12V load.

The Goal: Turn on a 12V relay using a 5V Arduino. This table is non-negotiable

Output Side:

Protection:

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.

Since you cannot buy a "1458 optocoupler" by that name, here is your shopping list based on performance needs:

Search Tip: Go to Mouser, Digi-Key, or LCSC. Type "DIP-6 optocoupler" and sort by CTR. Do not type "1458" unless you want op-amps.

A 3.3V GPIO cannot drive a 24V industrial PLC input. Use an optocoupler: