HT3-RED-T LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The HT3-RED-T is a 3mm red surface mount LED circuit board indicator manufactured by Bivar Inc. in the HT3 series. This component features a diffused, tinted lens with a domed top, rated for 2V operation at 30mA with a peak wavelength of 625nm and 30 millicandela brightness rating. The product is currently obsolete, necessitating identification of equivalent alternatives for ongoing design support and component sourcing in applications requiring compatible red indicator LEDs with surface mount right-angle mounting.

Substiute Parts

HT3-RED-T

Bivar Inc.In Stock: 1110HT3-RED-T Datasheet

Current PartRFQ

SSF-LXH305ID-TR

Lumex Opto/Components Inc.In Stock: 5992SSF-LXH305ID-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The SSF-LXH305ID-TR (Lumex Opto/Components Inc.) qualifies as an equivalent substitute based on matching the critical parameters that define functional compatibility for red circuit board indicator applications:

Matching Parameters:

• Lens size: 3mm, T-1 form factor
• Color: Red
• Voltage rating: 2V
• Lens type: Diffused, Tinted
• Lens style: Round with Domed Top
• Mounting type: Surface Mount, Right Angle
• Configuration: Single
• RoHS3 compliance

The substitute maintains functional compatibility within the same optical and electrical form factor while offering different operating characteristics within the acceptable range for indicator LED applications.

Parameter Comparison

Engineering Selection Recommendations

The SSF-LXH305ID-TR is designated as an active equivalent substitute for the obsolete HT3-RED-T. Both components maintain ROHS3 compliance and carry identical electrical and optical form factor specifications. The substitute exhibits superior moisture sensitivity classification (MSL 1 versus MSL 4), which provides extended handling flexibility in storage and assembly environments.

Circuit design applications utilizing the HT3-RED-T can transition directly to the SSF-LXH305ID-TR without modifications to mechanical mounting or electrical interface. The substitute's lower current rating (20mA versus 30mA) and higher brightness output (40mcd versus 30mcd) may require evaluation of series resistor values in existing circuit designs to maintain consistent brightness levels or to take advantage of reduced power consumption.

Frequently Asked Questions (FAQ)

Q: Can the SSF-LXH305ID-TR be directly substituted in circuits designed for HT3-RED-T? A: Direct substitution is mechanically and electrically feasible due to matching form factor, voltage rating, and mounting configuration. Circuit designers should evaluate the lower current rating and higher brightness output to determine if series resistor adjustments are necessary for optimal performance.

Q: What are the key differences between these two parts? A: The substitute differs in wavelength (635nm vs. 625nm), current requirement (20mA vs. 30mA), brightness rating (40mcd vs. 30mcd), viewing angle (60° vs. 40°), and moisture sensitivity level (MSL 1 vs. MSL 4). All other electrical and optical specifications remain compatible.

Q: Why is moisture sensitivity classification important for this substitution? A: The SSF-LXH305ID-TR carries MSL 1 (unlimited shelf life) compared to the HT3-RED-T's MSL 4 (72-hour maximum storage). This classification affects bake-out requirements and handling procedures in manufacturing environments. Lower MSL values provide reduced handling constraints and extended storage capability.

Q: Are both components available in the same packaging format? A: The HT3-RED-T is specified with standard packaging (not detailed in parameters). The SSF-LXH305ID-TR is supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly processes.

Q: What wavelength difference should be considered in the selection? A: The SSF-LXH305ID-TR operates at 635nm (deeper red) versus the HT3-RED-T at 625nm (standard red). This 10nm wavelength difference is within the red spectrum range and does not affect functional compatibility in standard indicator applications where color matching to the red category is the primary requirement.