QBLP671-S LED RED CLEAR 2PLCC SMD Equivalent & Substitute Parts

Part Overview

The QBLP671-S is a red LED indication component manufactured by QT Brightek (QTB) in a 2-PLCC surface mount package. This discrete LED operates at 2V forward voltage with a dominant wavelength of 640nm and delivers 200 millicandela at 20mA test current. The component features a clear, colorless lens with round flat-top styling and 120° viewing angle.

The QBLP671-S is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this LED specification.

Substiute Parts

QBLP671-S

QT Brightek (QTB)In Stock: 748QBLP671-S Datasheet

Current PartRFQ

QBLP670-R

QT Brightek (QTB)In Stock: 4664QBLP670-R Datasheet

Parametric EquivalentRFQ

VFJR1104LS-TR

Stanley Electric CoIn Stock: 1270VFJR1104LS-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QBLP671-S is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Color: Red
• Package / Case: 2-PLCC
• Mounting Type: Surface Mount
• Voltage - Forward (Vf) Typical: 2V
• Current - Test: 20mA
• Viewing Angle: 120°
• Lens Size: 2.40mm Dia
• Lens Transparency: Clear

Secondary Compatibility Parameters:

• Wavelength - Dominant: 620nm to 640nm range
• Millicandela Rating: 200mcd to 230mcd range
• Size / Dimension: 3.20mm L x 2.80mm W
• Height (Max): 2.10mm to 2.15mm
• RoHS Status: ROHS3 Compliant

The identified substitute parts meet all primary criteria and fall within acceptable ranges for secondary parameters. Substitutes are qualified for direct replacement in applications where the QBLP671-S is specified.

Parameter Comparison

Engineering Selection Recommendations

QBLP670-R (QT Brightek)

The QBLP670-R is an active product from the same manufacturer as the QBLP671-S. It maintains identical electrical specifications (2V forward voltage, 20mA test current, 120° viewing angle) and mechanical compatibility (2-PLCC package, 2.40mm lens diameter, 3.20mm x 2.80mm footprint). The dominant wavelength shifts from 640nm to 620nm, with millicandela rating increasing from 200mcd to 230mcd. Both components are ROHS3 compliant. The QBLP670-R is available in Tape & Reel packaging with significantly higher inventory (4624 units). This substitute is suitable for applications where the wavelength shift from 640nm to 620nm is acceptable and where increased brightness (230mcd vs 200mcd) does not create design constraints.

VFJR1104LS-TR (Stanley Electric Co)

The VFJR1104LS-TR is an active product from Stanley Electric Co. It maintains identical electrical specifications (2V forward voltage, 20mA test current, 120° viewing angle) and mechanical compatibility (2-PLCC package, 2.40mm lens diameter, 3.20mm x 2.80mm footprint). The dominant wavelength is 632nm with peak wavelength at 640nm, and millicandela rating is 210mcd. Both components are ROHS3 compliant. The VFJR1104LS-TR is available in Tape & Reel packaging with 1190 units in inventory. This substitute is suitable for applications where the wavelength specification of 632nm dominant (with 640nm peak) aligns with system requirements and where the 210mcd brightness level is acceptable.

Both substitutes are active products with established supply chains and full compliance certifications, providing reliable alternatives to the obsolete QBLP671-S.

Frequently Asked Questions (FAQ)

Q: Can QBLP670-R be used as a direct replacement for QBLP671-S?

A: The QBLP670-R meets all primary substitution criteria: identical 2V forward voltage, 20mA test current, 120° viewing angle, 2-PLCC package, and 2.40mm lens diameter. The dominant wavelength differs (620nm vs 640nm) and brightness increases (230mcd vs 200mcd). Direct replacement is possible if the application tolerates these wavelength and brightness variations.

Q: What is the wavelength difference between QBLP671-S and VFJR1104LS-TR?

A: The QBLP671-S has a dominant wavelength of 640nm. The VFJR1104LS-TR has a dominant wavelength of 632nm with peak wavelength at 640nm. This 8nm difference in dominant wavelength may affect color perception in visual indication applications.

Q: Are both substitute parts available in the same packaging as QBLP671-S?

A: The QBLP671-S is supplied in bulk packaging. Both substitute parts (QBLP670-R and VFJR1104LS-TR) are available in Tape & Reel (TR) packaging, which is standard for high-volume production environments. The 2-PLCC package format is identical across all three parts.

Q: Do the substitute parts have the same moisture sensitivity level?

A: The QBLP671-S has MSL 2A (4 Weeks). The QBLP670-R has MSL 3 (168 Hours), and the VFJR1104LS-TR has MSL 2A (4 Weeks). MSL differences affect storage and handling requirements. Lower MSL ratings require more stringent moisture control during storage and assembly.

Q: Are all three parts RoHS compliant?

A: Yes. The QBLP671-S, QBLP670-R, and VFJR1104LS-TR are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and assembly.

Q: What is the physical height difference between the main part and substitutes?

A: The QBLP671-S has a maximum height of 2.15mm. Both QBLP670-R and VFJR1104LS-TR have maximum heights of 2.10mm. This 0.05mm difference is negligible for PCB assembly and does not affect component placement or clearance in standard applications.

Q: Which substitute has better inventory availability?

A: The QBLP670-R has the highest inventory with 4624 units in stock, compared to 1190 units for VFJR1104LS-TR and 719 units for the obsolete QBLP671-S. For supply chain continuity, QBLP670-R offers the most reliable availability.