HMA121D

Transistor, Photovoltaic Output Optoisolators Overview

The onsemi HMA121D is a single-channel transistor output optocoupler housed in a compact 4-SMD package. It features an NPN phototransistor output capable of handling a maximum collector current of 80 mA and a collector-emitter voltage of 80 V. The device provides robust electrical isolation with a rated isolation voltage of 3750 Vrms. Key electrical parameters include a typical current transfer ratio of 300%, a maximum forward voltage of 1.3 V, and a power dissipation rating of 150 mW. It operates within a temperature range of -40°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides high-voltage galvanic isolation between input and output circuits
• Features a fast-response NPN phototransistor for efficient signal transmission
• Designed for surface-mount installation in space-constrained applications

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Microcontroller interface circuits

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., D, DR2) against the official datasheet to ensure correct packaging and tape-and-reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability varies by region. Ensure the procurement channel is authorized to guarantee component authenticity and traceability.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a single-channel transistor output is required with high isolation voltage ratings. Consider the 80 mA collector current limit and 80 V breakdown voltage for load compatibility. Evaluate the 300% CTR for logic level shifting needs. Verify that the 4-SMD footprint matches the PCB design constraints and thermal management requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to onsemi's line of transistor output optocouplers, designed for general-purpose isolation tasks. It utilizes LED-to-phototransistor technology to transmit digital signals across isolated barriers. The series is engineered for reliability in industrial environments, offering consistent performance across the specified operating temperature range.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Check for direct pin-compatible substitutes such as the HMA121DR2 variant, which shares identical electrical characteristics but may differ in packaging format. Cross-reference with other single-channel NPN output optocouplers from onsemi or competitors, ensuring matching isolation voltage, CTR, and package dimensions.