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onsemi 4N37M_F132 — Optoisolators

onsemi 4N37M_F132 Optoisolator, 4170Vrms, 100% CTR, 6-DIP

MPN4N37M_F132
Obsolete

onsemi 4N37M_F132 Optoisolator, single-channel, DC input, transistor with base output, 4170Vrms isolation, 100% min CTR, 6-DIP through-hole, Bulk.

onsemi 4N37M_F132 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

4N37M_F132 specifications
ParameterValue
Input typeDC
Output typeTransistor with Base
MountingThrough Hole
Voltage - isolation4170Vrms
Voltage - output30V
Voltage - forward (Vf)1.18V
Current transfer ratio100% @ 10mA
Current - DC forward (If)60 mA
Operating temperature-40°C~100°C
PackageBulk
Case6-DIP (0.300\", 7.62mm)
Channels1
Vce saturation300mV
Turn on (Turn off time)2µs, 2µs

Product details

The onsemi 4N37M_F132 is officially marked as Obsolete.

4170Vrms isolation and 100% min CTR

This single-channel optoisolator provides 4170Vrms of galvanic isolation between the DC input and the transistor output. The minimum current transfer ratio is 100% at 10mA forward current, meaning the output transistor can sink at least as much collector current as the LED drive current — a standard spec for logic-level interface and feedback in power supplies. The 6-DIP through-hole package (0.300-inch body width) is a common footprint for legacy designs and breadboard prototyping.

Switching speed and output drive

Typical turn-on and turn-off times are 2µs each, which limits the usable data rate to roughly 250 kbps in a simple digital isolator application — adequate for slow GPIO, relay drive, or 50/60 Hz zero-cross detection. The output transistor can handle up to 30V collector-emitter voltage with a maximum saturation voltage of 300mV at rated current. Maximum forward LED current is 60mA, with a typical forward voltage of 1.18V.

Frequently asked questions

What is the closest pin-compatible alternative to the 4N37M_F132?

The 4N37 base part number is a standard industry type; functionally equivalent parts from other manufacturers (e.g., Vishay, Lite-On) exist in the same 6-DIP footprint, but pin compatibility and CTR grade must be verified against the BOM requirement.