Overview
The HMHA281R2 is a high-performance optocoupler produced by onsemi, designed for applications requiring reliable electrical isolation and high current transfer ratios. This device features a compact 4-pin half-pitch mini-flat package, making it ideal for space-constrained designs. The HMHA281R2 consists of a gallium arsenide infrared emitting diode driving a silicon phototransistor, ensuring efficient signal transfer across the isolation barrier.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 1 | |
| Mounting | SMD | |
| Kind of Output | Transistor | |
| Insulation Voltage | 3750 VAC RMS | |
| CTR@If | 50-600% @ 5 mA | |
| Case | Mini-flat 4-pin | |
| Turn-on Time | 3 µs | |
| Turn-off Time | 3 µs | |
| Operating Temperature | -55 to +100 °C | |
| Storage Temperature | -55 to +125 °C | |
| Maximum Working Insulation Voltage | 565 V Peak | |
| Input Current | 200 mA | |
| Output Power | 300 mW |
Key Features
- Compact 4-pin half-pitch mini-flat package for optimum board space savings.
- High current transfer ratio (CTR) ranging from 50% to 600%.
- UL1577 and DIN-EN/IEC60747-5-5 safety and regulatory approvals.
- High insulation voltage of 3750 VAC RMS for 1 minute.
- Low turn-on and turn-off times of 3 µs each.
- Wide operating temperature range from -55 to +100 °C.
Applications
- Digital logic inputs.
- Microprocessor inputs.
- Power supply monitoring.
- Twisted pair line receivers.
- Telephone line receivers.
Q & A
- What is the HMHA281R2 optocoupler used for? The HMHA281R2 is used for applications requiring electrical isolation and high current transfer ratios, such as digital logic inputs, microprocessor inputs, and power supply monitoring.
- What is the insulation voltage of the HMHA281R2? The insulation voltage is 3750 VAC RMS for 1 minute.
- What is the current transfer ratio (CTR) of the HMHA281R2? The CTR ranges from 50% to 600% at 5 mA.
- What is the package type of the HMHA281R2? The package type is a 4-pin half-pitch mini-flat.
- What are the turn-on and turn-off times of the HMHA281R2? Both turn-on and turn-off times are 3 µs.
- What is the operating temperature range of the HMHA281R2? The operating temperature range is from -55 to +100 °C.
- Is the HMHA281R2 compliant with any safety standards? Yes, it is compliant with UL1577 and DIN-EN/IEC60747-5-5 safety standards.
- What is the maximum working insulation voltage of the HMHA281R2? The maximum working insulation voltage is 565 V Peak.
- What is the input current limit of the HMHA281R2? The input current limit is 200 mA.
- What is the output power limit of the HMHA281R2? The output power limit is 300 mW.
