3N263 Optoisolator Equivalent & Substitute Parts

Part Overview

The 3N263 is a single-channel optoisolator with transistor output rated for 1000VDC isolation voltage. This component provides galvanic isolation between input and output circuits using an LED-photodiode coupled architecture. The 3N263 is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support. The 3N262 serves as the manufacturer-recommended substitute, offering the same isolation voltage, package configuration, and operating temperature range while maintaining active product status.

Substiute Parts

3N263

TT Electronics/Optek TechnologyIn Stock: 11163N263 Datasheet

Current PartRFQ

3N262

TT Electronics/Optek TechnologyIn Stock: 7033N262 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3N262 qualifies as a direct substitute for the 3N263 based on the following critical parameters:

• Isolation Voltage: Both parts maintain 1000VDC isolation rating
• Channel Configuration: Single-channel design in both parts
• Output Architecture: Transistor output topology identical
• Voltage and Current Ratings: Maximum output voltage (30V) and current (30mA) specifications match
• Package and Mounting: Identical TO-72-4 metal can package with through-hole mounting
• Operating Temperature: Identical -55°C to 125°C range

The 3N262 differs in current transfer ratio specifications and rise/fall time characteristics, but these variations remain within acceptable substitution parameters for the optoisolator category. The primary distinction is product status: the 3N263 is obsolete while the 3N262 maintains active status.

Parameter Comparison

Engineering Selection Recommendations

The 3N262 is the manufacturer-recommended substitute for the obsolete 3N263. Both parts share identical isolation voltage, package configuration, and operating temperature specifications. The 3N262 offers the advantage of active product status, ensuring continued availability and manufacturing support.

The 3N262 achieves ROHS3 compliance, whereas the 3N263 is non-compliant. This distinction is significant for applications subject to RoHS regulations. The 3N262 demonstrates improved rise and fall time performance (20µs rise, 10µs fall versus 25µs for both parameters on the 3N263), providing faster switching characteristics in isolation applications.

Both parts maintain identical electrical ratings for output voltage (30V maximum), output current (30mA maximum), and saturation voltage (300mV maximum). The current transfer ratio specifications differ between the parts, with the 3N263 offering higher minimum and maximum CTR values. Applications requiring specific CTR performance should evaluate circuit tolerance to these variations.

Frequently Asked Questions (FAQ)

Q: Can the 3N262 directly replace the 3N263 in existing designs?

A: Yes. The 3N262 maintains identical isolation voltage (1000VDC), package type (TO-72-4), mounting configuration (through hole), and operating temperature range (-55°C to 125°C). Pin-for-pin compatibility is preserved.

Q: What are the key differences between these parts?

A: The primary differences are product status (3N263 is obsolete; 3N262 is active), RoHS compliance (3N262 is ROHS3 compliant; 3N263 is non-compliant), current transfer ratio specifications, and switching speed characteristics. The 3N262 provides faster rise and fall times.

Q: Are there any circuit design considerations when substituting the 3N262 for the 3N263?

A: The 3N262 exhibits lower current transfer ratio specifications (10-50% versus 20-100% for the 3N263). Circuits designed around the higher CTR of the 3N263 should be evaluated to confirm adequate performance with the 3N262's lower CTR range. Output voltage and current ratings remain identical.

Q: What is the package configuration for both parts?

A: Both the 3N263 and 3N262 use the TO-72-4 metal can package (TO-206AF designation), a four-pin through-hole configuration suitable for PCB mounting in standard DIP sockets or direct soldering.

Q: Does the 3N262 meet current regulatory requirements?

A: The 3N262 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The obsolete 3N263 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations.