3N263TX Optoisolator Equivalent & Substitute Parts

Part Overview

The 3N263TX is a 1000VDC isolation optoisolator with transistor output manufactured by TT Electronics/Optek Technology in a TO-72-4 metal can package. This component provides single-channel optical isolation for DC input applications with 30mA output current capability. The 3N263TX is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

3N263TX

TT Electronics/Optek TechnologyIn Stock: 11363N263TX Datasheet

Current PartRFQ

3N262

TT Electronics/Optek TechnologyIn Stock: 7033N262 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3N263TX is determined by the following critical parameters:

• Isolation voltage rating of 1000VDC or higher
• Single-channel transistor output configuration
• Maximum output voltage of 30V or greater
• Maximum output current of 30mA or greater
• TO-72-4 metal can package for mechanical and thermal compatibility
• Operating temperature range encompassing -55°C to 125°C
• Through-hole mounting type

The 3N262 qualifies as a direct substitute based on matching all mechanical, electrical, and thermal specifications. While the 3N262 exhibits lower current transfer ratio ranges (10% to 50% @ 1mA versus 20% to 100% @ 1mA), this parameter variation remains within acceptable substitution criteria as the minimum isolation voltage, output ratings, and package specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

The 3N262 is the recommended substitute for the obsolete 3N263TX. Both components are manufactured by the same supplier and share identical mechanical packaging, isolation voltage ratings, and output current specifications. The 3N262 offers the additional advantage of active product status, ensuring continued availability and supply chain reliability.

The 3N262 achieves ROHS3 compliance, whereas the 3N263TX is non-compliant. This compliance improvement supports modern manufacturing standards and regulatory requirements for new designs and production runs.

The 3N262 demonstrates improved switching performance with faster fall time (10µs versus 25µs), which may provide marginal benefits in high-frequency switching applications. The lower current transfer ratio range of the 3N262 (10% to 50% @ 1mA) compared to the 3N263TX (20% to 100% @ 1mA) requires verification that circuit designs do not depend on the higher transfer ratio specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 3N262 be used as a direct replacement for the 3N263TX in existing designs?

A: Yes. The 3N262 maintains identical isolation voltage, output current, output voltage, package type, and operating temperature specifications. Circuit designs must be verified to function within the 3N262's current transfer ratio range of 10% to 50% @ 1mA.

Q: What is the primary reason for substituting the 3N263TX?

A: The 3N263TX is classified as obsolete. The 3N262 is an active product from the same manufacturer with equivalent electrical and mechanical specifications, ensuring long-term availability.

Q: Are there any compliance differences between these parts?

A: Yes. The 3N262 is ROHS3 compliant, while the 3N263TX is non-compliant. Both parts maintain identical REACH and ECCN classifications.

Q: Does the TO-72-4 package remain the same for both parts?

A: Yes. Both the 3N263TX and 3N262 use the TO-206AF and TO-72-4 metal can package with through-hole mounting, ensuring mechanical and thermal compatibility in existing PCB designs.

Q: What is the significance of the current transfer ratio difference?

A: The 3N262 has a lower minimum current transfer ratio (10% versus 20% @ 1mA). Designs relying on the higher transfer ratio specification of the 3N263TX must be evaluated to confirm adequate performance with the 3N262's lower range.