The HMA121R3 is a 4-pin mini-flat package optocoupler consisting of a gallium arsenide infrared emitting diode driving a silicon phototransistor, with a 2.54 mm lead pitch. It supports a current transfer ratio in the range of 50-600% and has a collector-emitter voltage rating of 80 V. The device meets UL, CSA, BSI, and VDE isolation certifications with a steady-state isolation voltage of 3750 VRMS. It has a creepage and clearance of at least 5 mm and is rated for operation from -40°C to +100°C. The part is available in tape and reel packaging with 180° rotated units and is certified for infrared reflow soldering up to 230°C. The HMA121 series is not rated for use in life support systems.
OPTOISO 3.75KV TRANSISTOR 4SMD Product overview: HMA121R3 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-HMA121R3 can be used for catalog matching and distributor lookup.
| ERSAELECTRONICS PTE. LTD. | |
|---|---|
| Product Category | Bipolar RF Transistors |
| Product Number | 903-HMA121R3 |
| Product Name | 3.75KV Bipolar Transistor |
| Package Type | 4-SMD, Gull Wing |
