Alternatives to onsemi 4N37M
onsemi 4N37M and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 4N37Monsemi |  4N37Vishay Semiconductor Opto Division | 4N37Isocom Components 2004 LTD | +1more | |
|---|---|---|---|---|
| FFF Compatibility | The pinout matches the queried 4N37M exactly (Anode, Cathode, NC, Emitter, Collector, Base on pins 1 to 6).Both parts use the industry-standard 6-DIP package with a 0.300 inch pitch.Meets or exceeds all key electrical ratings, including a minimum CTR of 100% at 10mA and an enhanced isolation voltage of 5000 Vrms. | The pinout is identical to the queried 4N37M.Same standard 6-DIP physical dimensions.Matches the 100% CTR minimum, 30V output max, and provides a higher safety isolation level. | ||
 AI Summary | 4N37M by onsemi: Optoisolator Transistor with Base Output 4170Vrms 1 Channel 6-DIP. | This is a direct drop-in replacement from Vishay that offers superior isolation voltage and a wider temperature range. It matches the original part's electrical specifications and footprint.
| A high-isolation replacement from Isocom Components that perfectly preserves the original part's switching speed and electrical performance while elevating isolation voltage to 5300 Vrms.
| |
| Lifecycle Status | Active | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Optoisolator Transistor with Base Output 4170Vrms 1 Channel 6-DIP | Optoisolator Transistor with Base Output 5000Vrms 1 Channel 6-DIP | Optoisolator Transistor with Base Output 5300Vrms 1 Channel 6-DIP | |
| Manufacturer | onsemi | Vishay Semiconductor Opto Division | Isocom Components 2004 LTD | |
| Type | Optocouplers, Optoisolators | Optocouplers, Optoisolators | Optocouplers, Optoisolators | |
| Datasheet | Open | Open | Open | |
| Lead Time | 24 weeks | 18 weeks | 4 weeks | |
| Country of Origin | TH | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.49.8000 | - | - | |
| Moisture Sensitivity Level | Not Applicable | - | - | |
| Input Type | DC | - | - | |
| Output Type | Transistor with Base | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | 6-DIP (0.300", 7.62mm) | - | - | |
| Number of Channels | 1 | - | - | |
| Voltage - Isolation | 4170Vrms | - | - | |
| Vce Saturation (Max) | 300mV | - | - | |
| Operating Temperature | -40°C ~ 100°C | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 4N37onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
| 4N32SVMonsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi 4N37M is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.
The closest qualified second sources for the onsemi 4N37M are the 4N37 (Vishay Semiconductor Opto Division) and the 4N37 (Isocom Components 2004 LTD), out of 3 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the 4N37M are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The 4N37M (onsemi) is a part in the Optocouplers, Optoisolators category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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