The HMA121 series is a 4-pin optocoupler consisting of a gallium arsenide infrared emitting diode driving a silicon phototransistor in a compact mini-flat package with 2.54 mm lead pitch and maximum 2.4 mm standoff height. It provides current transfer ratio ranges from 50% to 600% depending on grade, with a collector-emitter voltage rating of 80 V and isolation voltage of 3750 VRMS. The device is certified by UL, CSA, BSI, and VDE, with creepage and clearance of at least 5 mm. It operates from -40°C to +100°C and supports infrared reflow up to 230°C. The exact variant HMA121R1V is not listed, but the series specifications apply.
OPTOISO 3.75KV TRANSISTOR 4SMD Product overview: HMA121R1V from ON Semiconductor 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 3.75KV. Search-friendly keywords include transistor, BJT, switching, amplification, 3.75KV, 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-HMA121R1V can be used for catalog matching and distributor lookup.
| ERSAELECTRONICS PTE. LTD. | |
|---|---|
| Product Category | Bipolar RF Transistors |
| Product Number | 903-HMA121R1V |
| Product Name | 3.75KV Bipolar Transistor |
| Package Type | Reel - TR |
