HMA121CR3V

Transistor, Photovoltaic Output Optoisolators Overview

The HMA121CR3V is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output and utilizes a surface-mount SMD-4 package. The device provides an isolation voltage of 3750 Vrms, ensuring robust electrical separation between input and output circuits. Key electrical parameters include a maximum collector-emitter voltage of 80 V, a maximum collector current of 80 mA, and a power dissipation rating of 150 mW. The forward voltage is specified at 1.3 V with a maximum forward current of 50 mA. The component operates within a temperature range of -40°C to +100°C and offers a typical current transfer ratio of 300%.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides high-voltage electrical isolation via a 3750 Vrms dielectric barrier between the infrared LED input and NPN phototransistor output.
• Delivers signal transmission through a compact four-pin surface-mount design suitable for automated assembly processes.
• Ensures reliable switching performance with defined saturation voltage and current handling capabilities for digital logic interfacing.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops for voltage regulation
• Signal transmission across isolated ground domains

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the obsolete status of this component before integration into new designs. Confirm that the specific suffix indicates tape-and-reel packaging if required for manufacturing. Check for RoHS compliance documentation in the official datasheet. Ensure that any substitute components meet the same isolation voltage and pinout requirements to maintain system integrity without redesign.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a single-channel transistor output optocoupler with high isolation voltage is required. The SMD-4 package suits space-constrained printed circuit board layouts. Consider the 80 V collector-emitter voltage limit for low-voltage signal switching applications. Verify that the operating temperature range meets the environmental conditions of the target deployment scenario.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the HMA121 series of transistor output optocouplers from onsemi. The series is designed for general-purpose isolation tasks. The CR3V suffix typically denotes specific packaging and binning characteristics within the product line. The manufacturer has transitioned production responsibilities, often associated with Fairchild Semiconductor heritage products now managed under the onsemi brand portfolio.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Publicly confirmed substitutes include HCPL-181-000E from Broadcom Limited. Verify pin compatibility and electrical specifications before substitution. Other similar transistor output optocouplers may require schematic adjustments due to differing pinouts or isolation ratings.