HMA121B

Description：OPTOISO 3.75KV 1CH TRANS 4-SMD
Series：-
Mfr：onsemi
Package：Box

SKU:637806f38dba Category: Transistor, Photovoltaic Output Optoisolators Brand: onsemi

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Product introduction

HMA121B is listed in the Transistor, Photovoltaic Output Optoisolators range at ChipApex. The manufacturer field lists onsemi. Its product description is OPTOISO 3.75KV 1CH TRANS 4-SMD. Review the specifications below when checking this part for your BOM.

Transistor, Photovoltaic Output Optoisolators specifications for HMA121B

Description：OPTOISO 3.75KV 1CH TRANS 4-SMD
Series：-
Mfr：onsemi
Package：Box
Number of Channels：1
Voltage - Isolation：3750Vrms
Current Transfer Ratio (Min)：50% @ 5mA
Current Transfer Ratio (Max)：150% @ 5mA
Turn On / Turn Off Time (Typ)：-
Rise / Fall Time (Typ)：3µs, 3µs
Input Type：DC
Output Type：Transistor
Voltage - Output (Max)：80V
Current - Output / Channel：80mA
Voltage - Forward (Vf) (Typ)：1.3V (Max)
Current - DC Forward (If) (Max)：50 mA
Vce Saturation (Max)：400mV
Operating Temperature：-40°C ~ 100°C
Mounting Type：Surface Mount
Package / Case：4-SMD, Gull Wing
Supplier Device Package：4-SMD

Transistor, Photovoltaic Output Optoisolators datasheet and documents for HMA121B

HMA121B

Transistor, Photovoltaic Output Optoisolators Overview

The HMA121B is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output and is housed in a compact SMD-4 package suitable for surface mount applications. The device provides high isolation with a rated insulation voltage of 3750 Vrms. Key electrical specifications include a maximum collector-emitter voltage of 80 V, a maximum collector current of 80 mA, 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 galvanic isolation between input and output circuits using a transistor output configuration.

Transistor, Photovoltaic Output Optoisolators Applications

General purpose signal isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the obsolete status of this component before design finalization. Confirm availability through authorized distributors or approved substitute sources. Ensure compliance with RoHS and REACH regulations as documented in the manufacturer's material composition declarations. Validate that the replacement part meets all original electrical and mechanical requirements.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component for applications requiring basic transistor output isolation in a small form factor. Consider the 3750 Vrms insulation rating for safety-critical interfaces. Evaluate the thermal performance within the specified operating temperature range. Verify compatibility with the target PCB footprint and soldering processes for SMD-4 packages.

Transistor, Photovoltaic Output Optoisolators Part Context

This component belongs to the HMA121 series of optocouplers from onsemi. It is designed for general-purpose isolation tasks where cost-effective, reliable signal transfer is required. The series typically offers standard transistor outputs suitable for digital signal transmission across isolated boundaries.