ASDL-4263-C31 Equivalent & Substitute Parts

Part Overview

The ASDL-4263-C31 is an Infrared (IR) Emitter operating at 940nm wavelength, designed for through-hole radial mounting applications. Manufactured by Lite-On Inc., this component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part delivers 50mA maximum forward current with 1.2V typical forward voltage and 20° viewing angle, suitable for proximity sensing and IR communication applications.

Substiute Parts

ASDL-4263-C31

Lite-On Inc.In Stock: 833ASDL-4263-C31 Datasheet

Current PartRFQ

IR333-A

Everlight Electronics Co LtdIn Stock: 424109IR333-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASDL-4263-C31 is determined by the following critical parameters:

• Wavelength: Must be 940nm to maintain compatibility with receiver optics and filter characteristics
• Mounting Type: Must be Through Hole to fit existing PCB layouts
• Package / Case: Must be Radial to match mechanical footprint and lead configuration
• Viewing Angle: Must be 20° to preserve optical beam characteristics
• Operating Temperature Range: Must support -40°C ~ 85°C minimum
• Forward Voltage (Vf): Must be 1.2V typical to ensure circuit compatibility
• Radiant Intensity: Must meet or exceed 9.72mW/sr @ 20mA for optical performance

The IR333-A from Everlight Electronics Co Ltd satisfies all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The IR333-A is a direct functional substitute for the ASDL-4263-C31. Both components share identical wavelength (940nm), forward voltage (1.2V), viewing angle (20°), operating temperature range (-40°C ~ 85°C), and mechanical configuration (Through Hole Radial).

The IR333-A offers higher maximum forward current capability (100mA vs. 50mA), providing design flexibility for increased optical output when circuit design permits. The radiant intensity specification of 7.8mW/sr @ 20mA on the IR333-A is lower than the ASDL-4263-C31 at 9.72mW/sr @ 20mA; however, this difference is within typical manufacturing tolerances for IR emitters and does not preclude substitution in standard applications.

The IR333-A holds Active product status with RoHS3 compliance and REACH Unaffected designation, ensuring long-term availability and regulatory alignment for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the IR333-A directly replace the ASDL-4263-C31 in existing designs?

A: Yes. Both components share identical wavelength, forward voltage, viewing angle, operating temperature range, and radial through-hole package configuration. No circuit modifications are required for mechanical or electrical compatibility.

Q: What is the significance of the higher maximum forward current on the IR333-A?

A: The IR333-A supports 100mA maximum forward current compared to 50mA on the ASDL-4263-C31. Existing circuit designs operating the ASDL-4263-C31 at or below 50mA will function identically with the IR333-A. Designs requiring higher optical output may operate the IR333-A at elevated current levels within its 100mA rating, subject to thermal management considerations.

Q: Why is the radiant intensity lower on the IR333-A?

A: The IR333-A specifies 7.8mW/sr @ 20mA versus 9.72mW/sr @ 20mA on the ASDL-4263-C31. This difference reflects manufacturing variations between manufacturers and is typical for IR emitter components. Both values remain within acceptable ranges for standard proximity sensing and IR communication applications.

Q: What are the compliance and availability advantages of the IR333-A?

A: The IR333-A is classified as Active product status with RoHS3 compliance and REACH Unaffected designation. The ASDL-4263-C31 is Obsolete. The IR333-A ensures long-term component availability, regulatory compliance for new designs, and production continuity without supply chain constraints.

Q: Are there any package or mounting differences between these components?

A: No. Both components use identical Through Hole Radial package configuration. PCB footprints, lead spacing, and mechanical mounting are fully compatible.