Equivalent & Substitute Parts for 4N36-X009

Part Overview

The 4N36-X009 is an optoisolator transistor with base output manufactured by Vishay Semiconductor Opto Division. This component provides 5000Vrms isolation in a 6-SMD surface mount package with single-channel transistor output configuration. The part is active and in production status with 863 units currently in stock. Alternative equivalent parts are necessary to address supply chain flexibility, inventory availability across different manufacturers, and specific application requirements where parametric variations may be acceptable within design tolerances.

Key Parameters

Parameter	Value
Manufacturer Part Number	4N36-X009
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	100% @ 10mA
Output Type	Transistor with Base
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	6-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 4N36-X009 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Isolation: 5000Vrms minimum (5300Vrms acceptable as higher rating)
Number of Channels: 1 (single channel required)
Output Type: Transistor with Base
Voltage - Output (Max): 30V
Current - Output / Channel: 50mA
Mounting Type: Surface Mount
Package / Case: 6-SMD, Gull Wing
Operating Temperature Range: -55°C ~ 100°C
Input Type: DC

Parametric Equivalent Parts (Vishay 4N35 and 4N37 series) maintain identical electrical specifications and packaging, differing only in manufacturing lot codes (X007, X009, X017 variants). These parts are direct substitutes with no functional differences.

Manufacturer Recommended Parts (Isocom Components 4N25, 4N26, 4N27, 4N28, 4N35 series) provide functional equivalence with allowable parametric variations. The 4N25, 4N26, and 4N27 series maintain 5300Vrms isolation (exceeding the 5000Vrms requirement) with identical output specifications. The 4N28 and Isocom 4N35 series operate at 7.5Vpk isolation, which does not meet the 5000Vrms isolation requirement and are not suitable substitutes for this application.

Parameter Comparison

Parameter	4N36-X009	4N35-X007	4N35-X009	4N35-X017	4N37-X009	4N25XSM	4N25XSMT&R	4N26XSMT&R	4N27XSMT&R
Manufacturer	Vishay	Vishay	Vishay	Vishay	Vishay	Isocom	Isocom	Isocom	Isocom
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	100% @ 10mA	100% @ 10mA	100% @ 10mA	100% @ 10mA	100% @ 10mA	20% @ 10mA	20% @ 10mA	20% @ 10mA	10% @ 10mA
Output Type	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	30V	30V	30V	30V	30V	30V	30V	30V	30V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	863 Pcs	1308 Pcs	3050 Pcs	2769 Pcs	2200 Pcs	1181 Pcs	1713 Pcs	1966 Pcs	1843 Pcs

Engineering Selection Recommendations

Vishay Parametric Equivalents (4N35-X007, 4N35-X009, 4N35-X017, 4N37-X009): These parts are direct functional equivalents with identical electrical and mechanical specifications. Selection among these variants is based on inventory availability and supply chain requirements. All maintain ROHS3 compliance and MSL 1 rating. The 4N35-X009 offers the highest inventory level at 3050 units.

Isocom Manufacturer Recommended Parts (4N25XSM, 4N25XSMT&R, 4N26XSMT&R, 4N27XSMT&R): These parts exceed the isolation voltage requirement at 5300Vrms and maintain all critical output specifications. Current transfer ratio values are lower (10-20% @ 10mA versus 100% @ 10mA), which may impact circuit performance in applications requiring high current transfer efficiency. These parts are suitable only where lower current transfer ratio is acceptable within design margins. All maintain ROHS3 compliance and MSL 1 rating. Packaging variants include both tube (XSM) and tape & reel (XSMT&R) options.

Parts Not Recommended: 4N28XSM and Isocom 4N35XSM do not meet the 5000Vrms isolation requirement (7.5Vpk rating) and are not suitable substitutes for this application.

Frequently Asked Questions (FAQ)

Q: Can I substitute 4N35-X009 for 4N36-X009 in my design?

A: Yes. The 4N35-X009 is a parametric equivalent with identical isolation voltage (5000Vrms), current transfer ratio (100% @ 10mA), output specifications (30V max, 50mA), and package configuration (6-SMD, Gull Wing). Both parts are manufactured by Vishay Semiconductor Opto Division and maintain ROHS3 compliance.

Q: What is the difference between 4N25XSMT&R and 4N25XSM?

A: Both parts are manufactured by Isocom Components with identical electrical specifications. The primary difference is packaging: XSMT&R denotes tape & reel format for automated assembly, while XSM denotes tube packaging for manual handling. Electrical performance is equivalent.

Q: Can I use Isocom 4N25 series parts as substitutes?

A: Isocom 4N25, 4N26, and 4N27 series parts meet the isolation voltage requirement (5300Vrms exceeds 5000Vrms) and output specifications. However, current transfer ratio is significantly lower (10-20% @ 10mA versus 100% @ 10mA). Substitution is acceptable only if your circuit design tolerates reduced current transfer efficiency. Circuit simulation or testing is necessary to confirm performance within your specific application parameters.

Q: Why are 4N28 and Isocom 4N35 not listed as substitutes?

A: These parts operate at 7.5Vpk isolation rating, which does not meet the 5000Vrms isolation requirement specified for the 4N36-X009. They are not electrically equivalent for applications requiring 5000Vrms isolation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory requirements of the 4N36-X009.

Q: What packaging options are available for substitute parts?

A: Vishay parts are supplied in tube packaging. Isocom parts are available in both tube (XSM designation) and tape & reel (XSMT&R designation) formats. Tape & reel packaging is standard for high-volume automated assembly operations.

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