QBLP676-IW-NW Equivalent & Substitute Parts

Part Overview

The QBLP676-IW-NW is a white neutral 4000K LED indication component manufactured by QT Brightek (QTB). This surface mount device features a 2-SMD J-Lead configuration with a diffused oval lens and delivers 2000mcd at 20mA forward current. The component is currently in active product status with ROHS3 compliance and is supplied in Tape & Reel packaging.

Substitute parts are identified when product availability changes, supply chain disruptions occur, or when design flexibility permits component selection from alternative manufacturers while maintaining functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

QBLP676-IW-NW

QT Brightek (QTB)In Stock: 1990QBLP676-IW-NW Datasheet

Current PartRFQ

CLM3A-MKW-CWAXA513

CreeLED, Inc.In Stock: 1850CLM3A-MKW-CWAXA513 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the QBLP676-IW-NW is determined by the following critical parameters:

Electrical Compatibility Parameters:

• Forward voltage (Vf) within acceptable circuit design tolerance
• Test current rating (20mA standard for LED indication circuits)
• Viewing angle (120° for general indication applications)

Mechanical Compatibility Parameters:

• Mounting type (Surface Mount required)
• Package configuration (2-SMD, J-Lead form factor)
• Physical dimensions (footprint and height constraints)

Optical Compatibility Parameters:

• Color classification (White family)
• Luminous intensity (millicandela rating for brightness level)
• Wavelength range (color temperature for visual consistency)

Regulatory & Supply Parameters:

• RoHS compliance status
• Product availability and inventory status
• Moisture sensitivity level for storage and handling

The identified substitute CLM3A-MKW-CWAXA513 shares the core 2-SMD J-Lead package, surface mount configuration, 120° viewing angle, and 20mA test current. However, differences exist in color temperature (3200K warm white versus 4000K neutral white), luminous intensity (1680mcd versus 2000mcd), forward voltage (3.2V versus 3V), and product status (obsolete versus active).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (QBLP676-IW-NW): The QBLP676-IW-NW remains the recommended component for new designs and ongoing production. Active product status ensures continued availability and supply chain stability. ROHS3 compliance and MSL 3 rating provide standard handling and storage conditions suitable for most manufacturing environments. The 4000K neutral white color temperature and 2000mcd brightness deliver consistent optical performance for indication applications.

Substitute Consideration (CLM3A-MKW-CWAXA513): The CLM3A-MKW-CWAXA513 presents significant limitations for direct substitution. Obsolete product status indicates discontinued manufacturing and declining inventory availability. The warmer 3200K color temperature creates visual inconsistency with the neutral 4000K specification. Reduced brightness (1680mcd versus 2000mcd) may impact visibility in the target application. Higher forward voltage (3.2V versus 3V) requires circuit design verification to ensure proper current limiting and LED operation within rated parameters. Stricter moisture sensitivity (MSL 5A with 24-hour limit) demands enhanced storage and handling protocols compared to the main part's MSL 3 specification.

Substitution Feasibility: Substitution is technically possible only when all of the following conditions are met: (1) circuit design accommodates 3.2V forward voltage without exceeding maximum ratings, (2) application tolerates 16% reduction in luminous intensity, (3) visual appearance change from neutral to warm white is acceptable, (4) manufacturing environment supports MSL 5A moisture sensitivity requirements, and (5) inventory of obsolete component is confirmed available.

Frequently Asked Questions (FAQ)

Q: Can CLM3A-MKW-CWAXA513 be used as a direct drop-in replacement for QBLP676-IW-NW?

A: No. While both components share the 2-SMD J-Lead package and 120° viewing angle, critical differences prevent direct substitution. The substitute has lower brightness (1680mcd versus 2000mcd), warmer color temperature (3200K versus 4000K), higher forward voltage (3.2V versus 3V), and stricter moisture sensitivity (MSL 5A versus MSL 3). Each difference requires design verification before implementation.

Q: What is the impact of the 0.2V forward voltage difference?

A: The 3.2V forward voltage of the substitute versus 3V of the main part affects circuit current limiting calculations. In series resistor designs, the higher voltage drop across the LED reduces voltage available for the current limiting resistor, potentially resulting in higher LED current. Circuit simulation or testing is necessary to confirm operation remains within the 20mA test current specification and LED maximum ratings.

Q: Why is the substitute listed as obsolete?

A: Obsolete status indicates the manufacturer (CreeLED, Inc.) has discontinued production of the CLM3A-MKW-CWAXA513. Existing inventory may be available through component distributors, but long-term supply cannot be guaranteed. New designs should not rely on obsolete components.

Q: How do the color temperatures differ visually?

A: The main part operates at 4000K (neutral white), while the substitute operates at 3200K (warm white). The 800K difference produces a noticeably warmer, more yellowish appearance. In applications where color consistency is critical (such as indicator panels with multiple LEDs), this difference is visually apparent and may be unacceptable.

Q: What does MSL 5A (24 Hours) mean compared to MSL 3 (168 Hours)?

A: MSL 5A requires component use within 24 hours of package opening, while MSL 3 allows 168 hours (7 days) of exposure to ambient moisture before soldering. The substitute demands more stringent moisture control during storage and handling. Components must be stored in dry conditions with desiccant and used quickly after opening to prevent moisture absorption that could cause solder joint failures.

Q: Are the physical dimension differences significant?

A: The substitute is 0.3mm shorter in length (2.70mm versus 3.00mm) and 0.1mm taller in height (1.40mm versus 1.30mm). These differences are minor and typically do not affect PCB layout or mechanical clearance in standard applications. However, designs with tight height constraints or specific footprint requirements should verify compatibility.

Q: What compliance certifications apply to the substitute?

A: RoHS compliance status for the CLM3A-MKW-CWAXA513 is not specified in available data. The main part is ROHS3 compliant. Before selecting the substitute, confirm RoHS compliance status with the component supplier to ensure regulatory requirements are met for the target application and market.