QL484RT LED Red Clear 3MM T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The QL484RT is a red LED indicator from onsemi designed for through-hole mounting applications in a T-1 3mm package configuration. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing production support and design continuity. The through-hole radial mounting type and red indication function define the primary use case for this component in legacy and new designs requiring compatible alternatives.

Substiute Parts

QL484RT

onsemiIn Stock: 1220QL484RT Datasheet

Current PartRFQ

SSL-LX507DT3SRT

Lumex Opto/Components Inc.In Stock: 909SSL-LX507DT3SRT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QL484RT are identified based on the following critical parameters that determine functional and mechanical compatibility:

• Mounting Type: Through Hole radial configuration required
• Package Classification: T-1 or T-1 3/4 form factors acceptable for through-hole applications
• Function: Red LED indication
• Height Constraint: Maximum height must accommodate existing PCB layouts (reference height 4.10mm for QL484RT)
• Compliance Status: Active product status preferred for long-term availability; RoHS3 compliance recommended for new designs

The SSL-LX507DT3SRT qualifies as a substitute based on matching mounting type (through hole), radial package configuration, red LED function, and active product status. The T-1 3/4 DIMPLE TOP package represents a compatible form factor for through-hole applications, with a maximum height of 7.00mm suitable for standard PCB clearance requirements.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement:

The SSL-LX507DT3SRT from Lumex Opto/Components Inc. is the qualified substitute for the obsolete QL484RT. Selection is based on:

• Active product status ensuring long-term availability and supply chain continuity
• ROHS3 compliance meeting current regulatory requirements for new designs
• Identical radial through-hole mounting configuration
• Compatible T-1 family package form factor
• Matching REACH and ECCN classifications

Design Consideration:

The SSL-LX507DT3SRT has a maximum height of 7.00mm compared to the QL484RT at 4.10mm. PCB layout verification is required to confirm adequate clearance in existing designs. The T-1 3/4 DIMPLE TOP package is a standard through-hole form factor and will fit standard LED mounting holes.

Compliance Advantage:

The substitute part's ROHS3 compliance status provides regulatory advantage for designs requiring current environmental compliance certifications, whereas the original QL484RT is RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q: Can the SSL-LX507DT3SRT directly replace the QL484RT in existing PCB designs?

A: The SSL-LX507DT3SRT is mechanically and functionally compatible as a through-hole radial LED. The primary design consideration is the increased height (7.00mm vs. 4.10mm). Verify that the PCB layout provides sufficient vertical clearance above the component mounting area. The radial lead configuration and hole spacing are standard for T-1 family packages.

Q: What are the key electrical differences between these parts?

A: The QL484RT specifications are not fully documented in the available data. The SSL-LX507DT3SRT provides the following electrical characteristics: forward voltage of 1.7V typical, test current of 20mA, peak wavelength of 660nm, and viewing angle of 140°. These are standard parameters for red LED indicators and should be verified against the original circuit design requirements.

Q: Is the SSL-LX507DT3SRT suitable for new product designs?

A: Yes. The SSL-LX507DT3SRT is an active product with ROHS3 compliance, making it suitable for new designs requiring current regulatory compliance. The through-hole radial configuration is well-established for LED indicator applications.

Q: Are there any supply chain advantages to using the substitute part?

A: The SSL-LX507DT3SRT is actively manufactured by Lumex Opto/Components Inc. with reported inventory of 888 pieces in stock. The QL484RT is obsolete, making the substitute the only viable option for ongoing production support.

Q: What is the significance of the T-1 3/4 DIMPLE TOP package designation?

A: The T-1 3/4 DIMPLE TOP is a standard through-hole LED package with a dimpled lens top. It is compatible with standard 3mm LED mounting holes and is a recognized form factor within the T-1 family of packages. The "3/4" designation refers to the package diameter classification.