QTLP650C34TR Equivalent & Substitute Parts

Part Overview

The QTLP650C34TR is a dual-color surface mount LED manufactured by Everlight Electronics Co Ltd, featuring independent green and yellow light emission in a 1210 (3225 Metric) package. This component is classified as obsolete, indicating discontinued production and limited availability. The part provides LED indication functionality with a clear lens and rectangular flat-top design suitable for standard PCB assembly processes.

Due to its obsolete status, identifying equivalent substitute parts with compatible electrical and mechanical characteristics is necessary for design continuity and procurement planning. Substitute parts must maintain compatibility across forward voltage, current ratings, package dimensions, and mounting specifications to ensure direct replacement capability in existing circuit designs.

Substiute Parts

QTLP650C34TR

Everlight Electronics Co LtdIn Stock: 772QTLP650C34TR Datasheet

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HSMF-C156

Broadcom LimitedIn Stock: 28851HSMF-C156 Datasheet

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LTST-C155KGJSKT

Lite-On Inc.In Stock: 2489LTST-C155KGJSKT Datasheet

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SM1210BC-Y/G

Bivar Inc.In Stock: 1096SM1210BC-Y/G Datasheet

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SML-LX1210YGC-TR

Lumex Opto/Components Inc.In Stock: 5584SML-LX1210YGC-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the QTLP650C34TR is determined by the following critical parameters:

Mechanical Compatibility:

• Package type: 1210 (3225 Metric) surface mount
• Physical dimensions: 3.20mm L x 2.70mm W, 1.10mm maximum height
• Lens style: Rectangle with flat top
• Mounting type: Surface mount

Electrical Compatibility:

• Dual-color configuration: Green and Yellow independent operation
• Forward voltage range: 2.0V to 2.3V for both colors
• Test current: 20mA for both colors
• Wavelength range: Green 565–574nm, Yellow 583–591nm

Regulatory Compliance:

• RoHS3 compliance required
• ECCN: EAR99
• HTSUS: 8541.41.0000

All substitute parts listed maintain these core parameters within acceptable engineering tolerances. Variations in millicandela rating, viewing angle, and lens transparency (clear versus diffused) do not preclude substitution when electrical and mechanical specifications align.

Parameter Comparison

Engineering Selection Recommendations

LTST-C155KGJSKT (Lite-On Inc.)

This part provides the closest electrical match to the QTLP650C34TR with identical forward voltage specifications (2V Green, 2V Yellow) and clear lens transparency. The part is in active production status, ensuring long-term availability. RoHS3 compliance and MSL rating of 3 align with the original component. Higher millicandela ratings (35mcd Green, 30mcd Yellow) provide increased brightness margin without affecting substitution compatibility.

SML-LX1210YGC-TR (Lumex Opto/Components Inc.)

This substitute offers compatible electrical characteristics with forward voltages of 2.2V Green and 2.1V Yellow, within acceptable tolerance of the original 2V specification. Clear lens transparency and identical package dimensions ensure mechanical compatibility. Active production status and RoHS3 compliance support long-term procurement. MSL rating of 3 matches the original component.

SM1210BC-Y/G (Bivar Inc.)

This part maintains mechanical compatibility and clear lens transparency. Forward voltage for yellow (2V) matches the original specification exactly, while green forward voltage (2.3V) represents a 0.3V increase. Active production status and RoHS3 compliance are confirmed. Lower millicandela ratings for yellow (6mcd) closely match the original 6.5mcd specification.

HSMF-C156 (Broadcom Limited)

This substitute provides the highest brightness ratings (15mcd Green, 8mcd Yellow) and widest viewing angle (170°). Forward voltages (2.2V Green, 2.1V Yellow) are within acceptable tolerance. The diffused lens transparency differs from the original clear lens, affecting light distribution characteristics. Active production status and RoHS3 compliance are confirmed. MSL rating of 2A provides superior moisture protection compared to the original MSL 3.

Frequently Asked Questions (FAQ)

Q: Can the HSMF-C156 substitute for the QTLP650C34TR despite having a diffused lens instead of clear?

A: The HSMF-C156 maintains all critical electrical and mechanical parameters required for substitution. The diffused lens transparency alters light distribution and appearance but does not prevent functional replacement. Selection depends on whether the application requires specific optical characteristics of a clear lens.

Q: What is the significance of the forward voltage differences between substitute parts?

A: Forward voltage variations of 0.1V to 0.3V across substitute parts fall within standard LED manufacturing tolerances and circuit design margins. Circuit designs using current-limiting resistors accommodate these variations without performance degradation. The original QTLP650C34TR specification of 2V represents the typical value; substitutes with 2.1V to 2.3V operate within acceptable parameters.

Q: Are all substitute parts suitable for direct PCB replacement without design modification?

A: Yes. All substitute parts maintain identical package dimensions (3.20mm L x 2.70mm W, 1.10mm height), mounting type (surface mount), and footprint compatibility. No PCB layout changes are required for mechanical substitution. Circuit design review is recommended to confirm forward voltage and current specifications align with existing current-limiting resistor values.

Q: Why does the LTST-C155KGJSKT have significantly higher millicandela ratings than the original part?

A: Higher millicandela ratings indicate increased light output intensity at the specified 20mA test current. This represents an improvement in brightness performance and does not prevent substitution. Applications requiring specific brightness levels should verify that increased output does not cause visual or functional issues in the target circuit.

Q: What is the impact of different MSL ratings on component handling and storage?

A: MSL (Moisture Sensitivity Level) ratings define maximum exposure time to ambient humidity before component reflow. The original QTLP650C34TR specifies MSL 3 (168 hours), while HSMF-C156 specifies MSL 2A (4 weeks). Lower MSL ratings require more stringent moisture control during storage and handling. Procurement and assembly processes must accommodate the most restrictive MSL requirement when mixing components.

Q: Can substitute parts with different viewing angles affect circuit performance?

A: Viewing angle variations (130° to 170°) affect the spatial distribution of light emission but do not alter electrical performance or substitution compatibility. Applications with specific optical requirements should verify that viewing angle changes do not impact intended light distribution or visibility characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, matching the original QTLP650C34TR specification. This ensures regulatory compliance for applications subject to RoHS requirements.