4N36SD Equivalent & Substitute Parts

Part Overview

The 4N36SD is an optoisolator transistor with base output manufactured by onsemi, rated for 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 4N36SD provides DC input with transistor output including base connection, suitable for high-voltage isolation applications requiring 1-channel optocoupling.

Substiute Parts

4N36SD

onsemiIn Stock: 201564N36SD Datasheet

Current PartRFQ

4N36SR2M

onsemiIn Stock: 123634N36SR2M Datasheet

DirectRFQ

4N36-X007

Vishay Semiconductor Opto DivisionIn Stock: 11294N36-X007 Datasheet

SimilarRFQ

4N36-X009

Vishay Semiconductor Opto DivisionIn Stock: 9354N36-X009 Datasheet

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4N36-X009T

Vishay Semiconductor Opto DivisionIn Stock: 28324N36-X009T Datasheet

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4N36SM

onsemiIn Stock: 221424N36SM Datasheet

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4N36SMT&R

Isocom Components 2004 LTDIn Stock: 8964N36SMT&R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 4N36SD is determined by the following critical parameters:

• Isolation Voltage: Minimum 5000Vrms to maintain equivalent or superior isolation performance
• Number of Channels: Must be 1 channel
• Output Type: Must be Transistor with Base
• Package / Case: Must be 6-SMD, Gull Wing for mechanical compatibility
• Mounting Type: Must be Surface Mount
• Current Transfer Ratio (Min): Minimum 100% @ 10mA for functional equivalence
• Operating Temperature Range: Must support -55°C ~ 100°C or equivalent
• Voltage - Output (Max): Must be 30V or greater

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes (onsemi): Parts from the same manufacturer with identical base product number (4N36) and compatible electrical specifications.

Similar Manufacturer Substitutes (Vishay & Isocom): Parts from alternative manufacturers meeting the same functional and mechanical requirements with comparable isolation voltage and switching characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

4N36-X009T and 4N36-X009 from Vishay Semiconductor Opto Division are the closest functional equivalents to the 4N36SD. Both maintain 5000Vrms isolation voltage, 100% current transfer ratio at 10mA, and identical 30V maximum output voltage. These parts are active products with ROHS3 compliance and full MSL 1 rating. The primary trade-off is increased switching time (10µs vs. 2µs), which is acceptable for most isolation applications where the 4N36SD was previously used.

4N36-X009T is packaged in Tape & Reel format, suitable for high-volume automated assembly. 4N36-X009 is supplied in Tube packaging for lower-volume requirements.

Secondary Substitutes (onsemi Family)

4N36SM and 4N36SR2M are active onsemi products maintaining the same 2µs switching speed as the 4N36SD. However, both are rated at 4170Vrms isolation voltage, which is lower than the original 5300Vrms specification. 4N36SR2M additionally specifies 40% minimum current transfer ratio, reducing design margin compared to the 100% specification of the 4N36SD.

These parts are suitable only when the application isolation voltage requirement can be reduced to 4170Vrms or lower.

Alternative Substitute (Isocom)

4N36SMT&R from Isocom Components is not recommended as a substitute. The specified isolation voltage of 7.5Vpk is incompatible with the 5300Vrms isolation requirement of the 4N36SD, representing a fundamental functional mismatch.

Compliance and Certification

All recommended substitutes (4N36-X009, 4N36-X009T, 4N36SM, 4N36SR2M) carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the 4N36SD. All parts are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Frequently Asked Questions (FAQ)

Q: Can 4N36SR2M replace 4N36SD directly?

A: 4N36SR2M is mechanically compatible and maintains the same 2µs switching speed. However, it is rated at 4170Vrms isolation voltage compared to the 4N36SD's 5300Vrms, and specifies 40% minimum current transfer ratio versus 100%. Use only if your application isolation voltage requirement is 4170Vrms or lower.

Q: What is the main difference between 4N36-X009 and 4N36-X009T?

A: Both parts are electrically identical Vishay optoisolators with 5000Vrms isolation and 100% current transfer ratio. The difference is packaging: 4N36-X009 is supplied in Tube format, while 4N36-X009T is supplied in Tape & Reel (TR) format. Select based on your assembly process requirements.

Q: Why do Vishay parts (4N36-X009 series) have 10µs switching time instead of 2µs?

A: The 4N36-X009 series from Vishay specifies 10µs turn-on and turn-off time compared to 2µs for onsemi parts. This is a manufacturer design difference. For applications requiring faster switching response, select onsemi alternatives (4N36SM or 4N36SR2M). For most isolation applications, 10µs switching time is acceptable.

Q: Is the 4N36SMT&R from Isocom a suitable substitute?

A: No. The 4N36SMT&R specifies 7.5Vpk isolation voltage, which is fundamentally incompatible with the 5300Vrms isolation requirement of the 4N36SD. This part is not suitable for applications requiring high-voltage isolation.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in three packaging formats: Tape & Reel (TR) for automated high-volume assembly, Tube for lower-volume manual or semi-automated assembly, and bulk formats. Select based on your production volume and assembly equipment capabilities. All substitute parts maintain the same 6-SMD, Gull Wing mechanical package.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts (4N36-X009, 4N36-X009T, 4N36SM, 4N36SR2M) are ROHS3 compliant. The original 4N36SD does not specify RoHS status but carries REACH Unaffected classification, matching the regulatory profile of active substitutes.

Q: What is the operating temperature range for substitutes?

A: Vishay parts (4N36-X009 series) and the 4N36SD support -55°C ~ 100°C. onsemi parts (4N36SM, 4N36SR2M) support -40°C ~ 100°C. Select based on your application's minimum operating temperature requirement.