The HMA121D is a 4-pin mini-flat package optocoupler consisting of a gallium arsenide infrared LED driving a silicon phototransistor, with a 2.54 mm lead pitch. It operates from -40 °C to +100 °C and has a maximum collector-emitter voltage of 80 V. The current transfer ratio is specified at 50-100% with an input current of 5 mA and collector-emitter voltage of 5 V. The device meets UL, CSA, BSI, and VDE safety certifications with isolation voltage of 3750 Vrms. Maximum forward current is 50 mA, reverse voltage is 6 V, and peak forward current is 1 A. The package has a standoff height of 2.4 mm, creepage and clearance of at least 5 mm, and supports reflow soldering up to 230 °C for 30 seconds.
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin Mini-Flat Box Product overview: HMA121D from onsemi is a Bipolar Transistor for signal amplification, switching, driver stages, discrete power control, and general electronic circuit design. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include key electrical ratings, package details, and application requirements. Search-friendly keywords include transistor, BJT, switching, amplification, Bipolar Transistor, Transistor, Photovoltaic Output Optoisolators. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 903-HMA121D can be used for catalog matching and distributor lookup.
| ERSAELECTRONICS PTE. LTD. | |
|---|---|
| Product Category | Bipolar RF Transistors |
| Product Number | 903-HMA121D |
| Product Name | Bipolar Transistor |
| IC(max) | 80 milliamps |
