QTLP600C34TR Equivalent & Substitute Parts Reference

Part Overview

The QTLP600C34TR is an active-status surface mount LED indicator manufactured by Everlight Electronics Co Ltd. This dual-color green/yellow LED features a compact 0606 package with clear lens and independent color configuration, designed for standard LED indication applications requiring 20mA test current at 2.1V (green) and 2V (yellow) forward voltage.

Substitute parts are identified based on functional equivalence in dual-color green/yellow LED indication, surface mount technology, and compatible electrical operating parameters. Alternative sources provide equivalent performance for applications where primary component availability is limited or where specific package or optical characteristics better suit design requirements.

Substiute Parts

QTLP600C34TR

Everlight Electronics Co LtdIn Stock: 754QTLP600C34TR Datasheet

Current PartRFQ

HSMF-C156

Broadcom LimitedIn Stock: 28851HSMF-C156 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

Substitute parts for the QTLP600C34TR are qualified based on the following substitution criteria:

Primary Compatibility Parameters:

• Dual-color green/yellow LED configuration with independent color operation
• Surface mount technology with compatible electrical characteristics
• Forward voltage range: 2.0V to 2.2V for both colors
• Test current: 20mA for both colors
• Wavelength compatibility: Green 565-572nm dominant, Yellow 585-590nm dominant
• RoHS3 compliance and active product status

Secondary Compatibility Parameters:

• Viewing angle: 130° to 170° acceptable range
• Millicandela rating: Minimum 10mcd green, 4mcd yellow
• Lens style: Rectangle with flat top
• Mounting: Surface mount only

The identified substitutes meet these criteria while accommodating variations in package size (0606 to 1210), lens transparency (clear to diffused), and physical dimensions that do not affect electrical or optical performance within standard application tolerances.

Parameter Comparison

Engineering Selection Recommendations

HSMF-C156 (Broadcom Limited): This substitute provides higher millicandela ratings (15mcd green, 8mcd yellow) and wider viewing angle (170°) compared to the primary part. Forward voltage is 0.1V higher for both colors (2.2V green, 2.1V yellow). The 1210 package is larger than the 0606 primary part. Diffused lens provides different optical characteristics than the clear lens of QTLP600C34TR. MSL rating of 2A (4 Weeks) is more stringent than the primary part's MSL 3 rating. All parts maintain ROHS3 compliance and active product status. Selection of HSMF-C156 is appropriate where increased brightness and wider viewing angle are required and PCB layout accommodates the larger 1210 package footprint.

SML-LX1210YGC-TR (Lumex Opto/Components Inc.): This substitute maintains clear lens transparency matching the primary part's optical characteristics. Forward voltage matches HSMF-C156 at 2.2V green and 2.1V yellow. Millicandela ratings are lower than both QTLP600C34TR and HSMF-C156 (10mcd green, 10mcd yellow). Viewing angle of 140° is intermediate between primary and HSMF-C156. The 1210 package size matches HSMF-C156. MSL rating of 3 (168 Hours) matches the primary part. All parts maintain ROHS3 compliance and active product status. Selection of SML-LX1210YGC-TR is appropriate where clear lens optical properties are required and PCB layout accommodates the 1210 package with moderate brightness requirements.

Frequently Asked Questions (FAQ)

Q: Can HSMF-C156 or SML-LX1210YGC-TR be used as direct drop-in replacements for QTLP600C34TR?

A: No. Both substitute parts use the 1210 package (3.20mm L x 2.70mm W x 1.10mm H max) compared to the primary part's 0606 package (1.90mm L x 1.60mm W x 0.80mm H max). PCB footprint and mounting hole patterns differ. Circuit board layout modifications are required. Forward voltage is 0.1V higher for both colors in both substitutes. Current-limiting resistor values in the circuit must be recalculated to maintain 20mA test current.

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

A: Forward voltage increases from 2.1V/2V (QTLP600C34TR) to 2.2V/2.1V (both substitutes). This 0.1V increase affects circuit design. Test current remains constant at 20mA for all parts. Millicandela ratings vary: QTLP600C34TR provides 12.5mcd green and 4mcd yellow; HSMF-C156 provides 15mcd green and 8mcd yellow; SML-LX1210YGC-TR provides 10mcd green and 10mcd yellow. Wavelength specifications remain within acceptable ranges for green/yellow LED indication applications.

Q: How do lens characteristics differ between these parts?

A: QTLP600C34TR and SML-LX1210YGC-TR feature clear colorless lenses providing direct color transmission. HSMF-C156 features a white diffused lens that scatters light and may alter perceived color intensity and viewing characteristics. Clear lenses are preferred for applications requiring precise color indication; diffused lenses are preferred for applications requiring uniform light distribution across wider angles.

Q: What is the impact of package size differences?

A: QTLP600C34TR uses 0606 package (1.90mm x 1.60mm). Both substitutes use 1210 package (3.20mm x 2.70mm). The 1210 package is approximately 3.4 times larger in footprint area. PCB layout must accommodate larger component spacing. Viewing angle increases from 130° (QTLP600C34TR) to 140-170° (substitutes) due to larger lens size. Height increases from 0.80mm to 1.10mm maximum.

Q: Are all parts RoHS3 compliant?

A: Yes. QTLP600C34TR, HSMF-C156, and SML-LX1210YGC-TR are all ROHS3 compliant. All parts are active-status products suitable for new designs.

Q: What are the moisture sensitivity level differences?

A: QTLP600C34TR and SML-LX1210YGC-TR have MSL rating of 3 (168 Hours). HSMF-C156 has MSL rating of 2A (4 Weeks), which is more stringent. MSL 2A requires storage at controlled humidity and shorter shelf life before reflow soldering. MSL 3 allows longer storage periods under standard conditions.