4N26TM Equivalent & Substitute Parts

Part Overview

The 4N26TM is an optoisolator transistor with base output manufactured by onsemi, featuring 7500Vpk isolation voltage in a 6-DIP package. This component provides galvanic isolation for single-channel applications requiring high voltage separation between input and output circuits. The 4N26TM is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

4N26TM

onsemiIn Stock: 10284N26TM Datasheet

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4N26TVM

onsemiIn Stock: 18564N26TVM Datasheet

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4N26G

Isocom Components 2004 LTDIn Stock: 7194N26G Datasheet

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4N26M

onsemiIn Stock: 509034N26M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4N26TM is determined by the following critical parameters:

• Number of Channels: Must be 1 (single channel)
• Output Type: Must be Transistor with Base
• Package / Case: Must be 6-DIP configuration
• Voltage - Isolation: Minimum 7500Vpk or equivalent Vrms rating
• Current Transfer Ratio (Min): Must be 20% @ 10mA or higher
• Vce Saturation (Max): Must not exceed 500mV
• Voltage - Output (Max): Must support 30V or higher
• Operating Temperature Range: Must cover -40°C ~ 100°C or compatible subset

The substitute parts 4N26TVM, 4N26G, and 4N26M meet the functional and mechanical requirements for direct substitution in applications where the 4N26TM is specified.

Parameter Comparison

Engineering Selection Recommendations

4N26TVM (onsemi): Active product status with ROHS3 compliance. Maintains identical electrical characteristics to the 4N26TM with matching package dimensions (0.400", 10.16mm). Suitable for direct replacement in new designs and legacy system updates.

4N26G (Isocom Components 2004 LTD): Active product status with ROHS3 compliance. Extends operating temperature range to -55°C. Package dimensions match the 4N26TM (0.400", 10.16mm). Electrical performance is equivalent across all critical parameters.

4N26M (onsemi): Active product status with ROHS3 compliance. Maintains electrical equivalence to the 4N26TM. Package dimensions differ (0.300", 7.62mm), requiring PCB layout verification before substitution. Recommended only when space constraints or existing board designs accommodate the smaller package footprint.

Frequently Asked Questions (FAQ)

Q: Can the 4N26TVM replace the 4N26TM directly? A: Yes. The 4N26TVM is electrically and mechanically equivalent, with identical package dimensions and electrical specifications. It is the recommended substitute due to active product status and onsemi manufacturer continuity.

Q: What is the difference between 4N26TVM and 4N26M? A: Both are onsemi products with active status and equivalent electrical performance. The primary difference is package size: 4N26TVM uses 6-DIP (0.400", 10.16mm), while 4N26M uses 6-DIP (0.300", 7.62mm). PCB layout compatibility must be verified before selecting 4N26M.

Q: Is the 4N26G suitable for applications requiring -55°C operation? A: Yes. The 4N26G extends the lower operating temperature limit to -55°C compared to the 4N26TM specification of -40°C. All other electrical parameters remain equivalent.

Q: Are all substitute parts RoHS compliant? A: Yes. The 4N26TVM, 4N26G, and 4N26M are all ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What isolation voltage rating should I verify when substituting? A: The 4N26TM specifies 7500Vpk isolation. The 4N26TVM and 4N26M provide 4170Vrms isolation (approximately 5900Vpk equivalent). The 4N26G specifies 7.5Vpk. Verify that your application isolation requirements are met by the selected substitute part.