Dell FAIRCHILD 4N25, 4N26, 4N27, 4N28, 4N35, 4N36, 4N37, H11A1, H11A2, H11A3, H11A4, H11A5 Data Manual
Summary
General-purpose phototransistor optocouplers provide reliable electrical isolation, utilizing a GaAs infrared LED coupled with a silicon phototransistor in a 6-pin package. This comprehensive manual details all necessary technical specifications, including absolute maximum ratings, key electrical characteristics, high isolation voltages, and transfer curves. It is essential reading for engineers and designers implementing robust solutions such as power supply regulators, digital logic interfaces, and microprocessor input systems where signal separation is critical.
Page 1 Text Content
GENERAL PURPOSE 6-PIN
PHOTOTRANSISTOR OPTOCOUPLERS
WHITE PACKAGE (-M SUFFIX) SCHEMATIC
PIN 1. ANODE 2. CATHODE 3. NO CONNECTION 4. EMITTER 5. COLLECTOR 6. BASE
BLACK PACKAGE (NO -M SUFFIX)
DESCRIPTION The general purpose optocouplers consist of a gallium arsenide infrared emitting diode driving a silicon phototransistor in a 6-pin dual in-line package.
FEATURES Also available in white package by specifying -M suffix, eg. 4N25-M UL recognized (File # E90700) VDE recognized (File # 94766) Add option V for white package (e.g., 4N25V-M) Add option 300 for black package (e.g., 4N25.300)
APPLICATIONS Power supply regulators Digital logic inputs Microprocessor inputs
© 2005 Fairchild Semiconductor Corporation Page 1 of 15 6/15/05
Page Summary Contents For Dell FAIRCHILD 4N25, 4N26, 4N27, 4N28, 4N35, 4N36, 4N37, H11A1, H11A2, H11A3, H11A4, H11A5 Data Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 15 |
| File Size | 605.17 KB |
| Published | July 07, 2026 |
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Frequently Asked Questions
What operating temperatures are safe for this optocoupler?
The Operating Temperature range is -55 to +100 °C.
Are White Package versions available?
Yes, they can be specified by adding the '-M' suffix (e.g., 4N25-M).
What are common applications for this device?
It is suitable for power supply regulators, digital logic inputs, and microprocessor inputs.
What is the maximum input isolation voltage?
The Isolation Voltage (V_ISO) for white packages is 7500 Vac(pk).