QBLP601-YG LED Green 0603 SMD Equivalent & Substitute Parts

Part Overview

The QBLP601-YG is an active green LED indication component manufactured by QT Brightek (QTB) in 0603 (1608 Metric) surface mount package. This discrete LED operates at 2.1V forward voltage with a dominant wavelength of 572nm and provides 10mcd luminous intensity. The component is designed for standard LED indication applications requiring a clear lens with rectangular flat-top configuration.

Substitute parts are identified to address inventory availability, extended lead times, or specific application requirements while maintaining compatibility within the defined electrical and mechanical parameters of the 0603 SMD LED category.

Substiute Parts

QBLP601-YG

QT Brightek (QTB)In Stock: 1201QBLP601-YG Datasheet

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SML-E12M8WT86

Rohm SemiconductorIn Stock: 35349SML-E12M8WT86 Datasheet

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SML-E12P8WT86

Rohm SemiconductorIn Stock: 5289SML-E12P8WT86 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QBLP601-YG are qualified based on the following criteria:

Mandatory Compatibility Parameters:

• Package / Case: 0603 (1608 Metric)
• Mounting Type: Surface Mount
• Color: Green
• Wavelength - Dominant: 572nm or adjacent green spectrum
• Voltage - Forward (Vf): 2.1V to 2.2V range
• Current - Test: 20mA
• Size / Dimension: 1.60mm L x 0.80mm W
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

Allowable Variations:

• Lens Color: Clear or Diffused (affects light distribution, not electrical compatibility)
• Millicandela Rating: Variation permitted within application tolerance
• Height (Max): Variation within 0.46mm to 0.60mm range acceptable for 0603 package class
• Wavelength - Dominant: 560nm to 572nm range qualifies as green LED indication spectrum

The substitute parts SML-E12M8WT86 and SML-E12P8WT86 (Rohm Semiconductor EXCELED™ series) meet these criteria with documented electrical and mechanical compatibility to the QBLP601-YG.

Parameter Comparison

Engineering Selection Recommendations

QBLP601-YG (Primary Component)

• Use when QT Brightek supply chain is preferred or specified
• Clear lens configuration provides direct light output without diffusion
• 10mcd intensity suitable for standard indication applications
• All compliance certifications current and active

SML-E12M8WT86 (Rohm Semiconductor)

• Electrical compatibility: Forward voltage 2.2V (0.1V higher than QBLP601-YG) within acceptable tolerance for 20mA test current
• Wavelength 572nm matches primary component specification
• 25mcd output provides higher luminous intensity; suitable for applications requiring increased visibility
• Diffused white lens alters light distribution compared to clear lens
• Tape & Reel packaging maintains automated assembly compatibility
• Height 0.46mm is lower profile than QBLP601-YG; verify PCB clearance requirements
• ROHS3 and MSL 3 compliance equivalent

SML-E12P8WT86 (Rohm Semiconductor)

• Electrical compatibility: Forward voltage 2.2V within acceptable tolerance
• Wavelength 560nm represents shorter wavelength within green spectrum; produces slightly more yellow-green appearance than 572nm
• 6.3mcd output lower than QBLP601-YG; suitable for applications with reduced brightness requirements
• Diffused white lens configuration
• Cut Tape & Digi-Reel® packaging; verify compatibility with assembly equipment if Tape & Reel is required
• Height 0.46mm lower profile
• ROHS3 and MSL 3 compliance equivalent

Selection Criteria:

• All three parts maintain ROHS3 compliance and MSL 3 rating
• All three parts are active products with documented inventory
• Substitution is electrically valid within the 2.1V to 2.2V forward voltage range at 20mA test current
• Lens transparency and color differences (clear vs. diffused white) affect optical performance; select based on application light distribution requirements
• Height variation (0.46mm vs. 0.60mm) requires PCB layout verification

Frequently Asked Questions (FAQ)

Q: Can SML-E12M8WT86 or SML-E12P8WT86 be used as direct replacements for QBLP601-YG in existing PCB designs?

A: Electrical substitution is valid. Both Rohm parts operate at 2.2V forward voltage (0.1V higher than QBLP601-YG) at 20mA test current, which is within acceptable tolerance for green LED indication circuits. However, physical height differences (0.46mm vs. 0.60mm) and lens transparency changes (diffused vs. clear) require design verification. Confirm PCB clearance and optical performance requirements before implementation.

Q: What is the impact of lens transparency differences between clear and diffused?

A: QBLP601-YG features a clear colorless lens that provides direct, focused light output. SML-E12M8WT86 and SML-E12P8WT86 feature diffused white lenses that scatter light over a wider viewing angle. Clear lenses concentrate light intensity in a narrower beam; diffused lenses distribute light more uniformly. Select based on application requirements for viewing angle and light distribution pattern.

Q: Are there wavelength differences between the substitute parts?

A: QBLP601-YG and SML-E12M8WT86 both specify 572nm dominant wavelength. SML-E12P8WT86 specifies 560nm dominant wavelength. Both 560nm and 572nm fall within the green LED spectrum for indication applications. The 560nm wavelength produces a slightly more yellow-green appearance compared to 572nm. For applications requiring precise color matching, SML-E12M8WT86 is preferred.

Q: What are the millicandela rating differences and their significance?

A: QBLP601-YG provides 10mcd, SML-E12M8WT86 provides 25mcd, and SML-E12P8WT86 provides 6.3mcd. Millicandela rating indicates luminous intensity. Higher mcd values produce brighter indication. Select based on application visibility requirements and ambient light conditions. SML-E12M8WT86 offers increased brightness; SML-E12P8WT86 offers reduced brightness.

Q: Are packaging format differences significant for assembly?

A: QBLP601-YG and SML-E12M8WT86 are supplied in Tape & Reel (TR) format, standard for automated pick-and-place assembly. SML-E12P8WT86 is supplied in Cut Tape (CT) & Digi-Reel® format. Verify assembly equipment compatibility with Digi-Reel® format if SML-E12P8WT86 is selected. TR format is generally preferred for high-volume automated assembly.

Q: Do all three parts meet the same compliance standards?

A: Yes. QBLP601-YG, SML-E12M8WT86, and SML-E12P8WT86 are all ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control. All three maintain Moisture Sensitivity Level 3 (168 Hours). Compliance documentation is equivalent across all three parts.

Q: What forward voltage tolerance should be considered for circuit design?

A: QBLP601-YG specifies 2.1V typical forward voltage; both Rohm substitutes specify 2.2V typical forward voltage. The 0.1V difference is within normal LED manufacturing tolerance and acceptable for standard indication circuit designs. Verify that current-limiting resistor calculations accommodate the 2.1V to 2.2V range to maintain 20mA test current specification.