QTLP2822 Equivalent & Substitute Parts

Part Overview

The QTLP2822 is a red LED indication component manufactured by onsemi, designed for through-hole axial mounting applications. This discrete 2V red LED features a rectangular lens with flat top and clear transparency, rated at 5.6mcd with a 150° viewing angle. The product is currently obsolete, making identification of functionally equivalent substitute parts essential for design continuity and component sourcing in legacy system maintenance and new designs requiring compatible alternatives.

Substiute Parts

QTLP2822

onsemiIn Stock: 766QTLP2822 Datasheet

Current PartRFQ

SSL-LXA228IC

Lumex Opto/Components Inc.In Stock: 845SSL-LXA228IC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QTLP2822 is determined by the following critical parameters:

• Electrical Compatibility: Forward voltage (Vf) of 2V and test current of 20mA establish the operational envelope for direct substitution
• Mounting Configuration: Through-hole axial mounting with flat leads is mandatory for mechanical compatibility
• Optical Characteristics: Red color (640nm peak wavelength) and clear lens transparency define the functional output
• Physical Dimensions: Package footprint of 2.50mm L x 2.00mm W ensures PCB layout compatibility
• Product Availability: Active product status ensures ongoing supply chain viability

The SSL-LXA228IC from Lumex Opto/Components Inc. qualifies as a substitute based on matching electrical parameters (2V forward voltage, 20mA test current), identical mounting type (through-hole axial), compatible color specification (red), and equivalent package dimensions. Variations in millicandela rating, viewing angle, lens geometry, and wavelength peak represent acceptable performance trade-offs within the red LED indication category.

Parameter Comparison

Engineering Selection Recommendations

The SSL-LXA228IC represents the primary substitute for the obsolete QTLP2822 based on product status and regulatory compliance. The SSL-LXA228IC maintains active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Both components share identical electrical parameters (2V forward voltage, 20mA test current) and mounting configuration (through-hole axial with flat leads), establishing functional equivalence for circuit operation.

Design considerations for substitution include the increased millicandela rating (30mcd vs. 5.6mcd) and narrower viewing angle (25° vs. 150°) of the SSL-LXA228IC, which may require circuit-level brightness adjustment or optical design modification depending on application requirements. The increased maximum height (2.80mm vs. 1.50mm) and different lens geometry (round domed vs. rectangular flat) necessitate mechanical layout verification to confirm PCB and enclosure compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SSL-LXA228IC be used as a direct drop-in replacement for the QTLP2822?

A: Electrical substitution is direct due to matching forward voltage and test current specifications. Mechanical substitution requires verification of PCB layout clearance due to increased component height (2.80mm vs. 1.50mm) and different lens geometry. Optical performance differs due to higher brightness and narrower viewing angle.

Q: What are the key differences between these two red LEDs?

A: The SSL-LXA228IC provides higher brightness (30mcd vs. 5.6mcd) with a narrower viewing angle (25° vs. 150°). The lens geometry differs (round domed vs. rectangular flat), and the SSL-LXA228IC is taller (2.80mm vs. 1.50mm). Both share identical electrical specifications and axial through-hole mounting.

Q: Are there compliance or regulatory differences between these parts?

A: Both components are REACH Unaffected and share MSL 1 (Unlimited) moisture sensitivity rating. The SSL-LXA228IC includes ROHS3 compliance certification, while the QTLP2822 is obsolete. For new designs, the SSL-LXA228IC provides superior regulatory alignment.

Q: How do the wavelength specifications compare?

A: The QTLP2822 has a peak wavelength of 640nm, while the SSL-LXA228IC is specified at 635nm. Both fall within the red LED spectrum and are visually indistinguishable for indication applications.

Q: What should be considered when substituting in existing designs?

A: Verify PCB layout clearance for the increased height of the SSL-LXA228IC. Confirm that the higher brightness (30mcd) does not exceed application requirements or cause visual glare. Validate that the narrower viewing angle (25