HMA121E

Transistor, Photovoltaic Output Optoisolators Overview

The HMA121E is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output housed in a compact SMD-4 package. The device provides high isolation with a rated insulation voltage of 3750 Vrms. Key electrical parameters include a maximum collector-emitter voltage of 80 V and a maximum collector current of 80 mA. The forward voltage is specified at 1.3 V with a maximum forward current of 50 mA. Power dissipation is limited to 150 mW, and the unit operates within a temperature range of -40°C to +100°C.

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 3750 Vrms insulation rating for safety-critical applications.
• Designed for surface-mount technology (SMD) assembly in a small 4-pin footprint.

Transistor, Photovoltaic Output Optoisolators Applications

• General-purpose signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Power supply feedback loops requiring electrical separation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm RoHS compliance details via official datasheets. Check for valid replacement parts if new production units are required. Ensure storage conditions meet semiconductor handling standards to prevent degradation.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a single-channel transistor output isolator is needed with high voltage isolation capabilities. Consider the SMD-4 package constraints for PCB layout. Evaluate thermal management requirements given the 150 mW power dissipation limit. Ensure the 80 V collector-emitter voltage meets the load requirements of the target circuit.

Transistor, Photovoltaic Output Optoisolators Part Context

The HMA121E belongs to the family of transistor output optocouplers from onsemi. It is designed for general-purpose isolation tasks where cost-effective and reliable signal transfer is required. The device utilizes standard phototransistor technology for efficient current transfer ratio performance.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers: HCPL-181-000E (Broadcom Limited). Verify pinout compatibility and electrical specifications before substitution.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the maximum operating temperature for the HMA121E?

The maximum operating temperature is +100°C.

Does the HMA121E support surface-mount installation?

Yes, it is available in an SMD-4 package suitable for surface-mount technology.