HMHA2801C

Transistor, Photovoltaic Output Optoisolators Overview

The HMHA2801C is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output with a collector-emitter voltage of 80V and a maximum collector current of 50mA. The device provides high isolation capability with a rated insulation voltage of 3750Vrms. Key electrical parameters include a typical forward voltage of 1.3V, a DC forward current limit of 50mA, and a saturation voltage of 300mV. The current transfer ratio ranges from 200% to 400% at a forward current of 5mA. Switching characteristics are defined by typical rise and fall times of 3µs. It operates within a temperature range of -55°C to +100°C and is housed in a compact 4-Mini-Flat surface-mount package.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides galvanic isolation between input and output circuits using an infrared LED and NPN phototransistor pair.
• Offers high dielectric strength with a 3750Vrms insulation rating for safety-critical applications.
• Features a compact 4-pin Mini-Flat surface-mount package designed for space-constrained PCB layouts.
• Delivers fast switching performance with typical rise and fall times of 3 microseconds.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation control systems requiring signal isolation
• Consumer electronics interfaces needing ground loop elimination
• Power supply feedback loops for voltage regulation
• Microcontroller I/O expansion with isolated communication lines

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'C' against the official onsemi datasheet to confirm the exact Current Transfer Ratio (CTR) binning, as it differs from the standard HMHA2801. Ensure the procurement specification matches the required 200%-400% CTR range. Confirm RoHS compliance status and packaging type (tube vs. reel) aligns with assembly requirements. Cross-reference the 4-Mini-Flat footprint dimensions with the manufacturer's land pattern guidelines to prevent soldering defects during placement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a small form factor is critical alongside high isolation voltage requirements. The HMHA2801C is suitable for designs needing moderate speed (3µs) and standard logic-level interfacing. Compare the 200%-400% CTR against system gain requirements to ensure adequate noise margin. Consider the 3750Vrms rating for applications exceeding basic insulation standards. Evaluate the 4-Mini-Flat package compatibility with automated pick-and-place equipment capabilities.

Transistor, Photovoltaic Output Optoisolators Part Context

The HMHA2801C belongs to the HMHA series of miniature optocouplers from onsemi. This series is engineered to replace larger DIP packages in modern surface-mount designs. It shares the same internal architecture as the HMHA2801 but specifies a tighter or different CTR tolerance band indicated by the 'C' suffix. The component is part of onsemi's portfolio focused on miniaturization and efficiency for industrial and consumer markets.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

The HMHA2801 is a functional equivalent with potentially different CTR specifications; verify CTR bins before substitution. The HMHA2801CR2 offers identical electrical characteristics but comes in tape-and-reel packaging instead of tubes. Ensure any replacement maintains the 4-Mini-Flat footprint and 3750Vrms isolation rating.