ASMF-LWG4-NQTBD Equivalent & Substitute Parts

Part Overview

The ASMF-LWG4-NQTBD is a warm white LED (3000K) manufactured by Broadcom Limited in a 1212 (3030 Metric) surface mount package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and design requirements. The part delivers 26 lm at 65mA test current with a forward voltage of 2.9V and maintains an 80 CRI rating suitable for warm white lighting applications.

Substiute Parts

ASMF-LWG4-NQTBD

Broadcom LimitedIn Stock: 1144ASMF-LWG4-NQTBD Datasheet

Current PartRFQ

ASMF-LWG8-NSVBD

Broadcom LimitedIn Stock: 50824ASMF-LWG8-NSVBD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASMF-LWG8-NSVBD qualifies as a direct substitute for the ASMF-LWG4-NQTBD based on the following alignment of critical parameters:

• Color Temperature: Both parts operate at 3000K warm white
• Color Rendering Index: Both maintain 80 CRI
• Test Current: Both rated at 65mA
• Maximum Current: Both rated at 240mA
• Viewing Angle: Both provide 120° viewing angle
• Package / Case: Both use 1212 (3030 Metric) surface mount package
• Physical Dimensions: Identical at 0.118" L × 0.118" W (3.00mm × 3.00mm)
• Height - Seated: Both maximum 0.031" (0.80mm)
• Compliance: Both ROHS3 compliant with MSL 3 rating

The substitute part is currently in active production status, addressing the obsolescence of the original component.

Parameter Comparison

Engineering Selection Recommendations

The ASMF-LWG8-NSVBD is the appropriate substitute for the obsolete ASMF-LWG4-NQTBD. Both parts are manufactured by Broadcom Limited and maintain identical electrical and mechanical specifications across all critical parameters: color temperature, CRI, current ratings, viewing angle, and package dimensions.

The substitute part offers the following advantages:

• Active production status ensures long-term availability
• Improved thermal resistance (10°C/W vs. 15°C/W) provides better heat dissipation
• Higher luminous efficacy (157 lm/W vs. 138 lm/W) at identical test current
• Slightly lower forward voltage (2.8V vs. 2.9V) reduces power consumption
• Higher typical flux output (29 lm vs. 26 lm) at 65mA test current

Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring compatibility with existing manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can ASMF-LWG8-NSVBD be used as a direct replacement for ASMF-LWG4-NQTBD in existing designs?

A: Yes. Both parts share identical package dimensions (1212/3030 Metric), mounting type (surface mount), electrical ratings (65mA test current, 240mA maximum), color temperature (3000K), and CRI (80). PCB layouts and thermal management designs require no modification.

Q: What are the differences between these two parts?

A: The primary differences are product status (obsolete vs. active), thermal resistance (15°C/W vs. 10°C/W), forward voltage (2.9V vs. 2.8V), and luminous efficacy (138 lm/W vs. 157 lm/W). The substitute provides improved thermal performance and efficiency.

Q: Are there packaging differences?

A: Yes. The original part is supplied in Cut Tape (CT) & Digi-Reel® format, while the substitute is supplied in Tape & Reel (TR) format. Both are suitable for automated assembly processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant with MSL 3 rating (168 hours), ensuring compatibility with standard manufacturing and storage requirements.

Q: What is the impact of the lower forward voltage in the substitute part?

A: The 0.1V reduction (2.9V to 2.8V) at identical test current results in lower power consumption and reduced heat generation, improving overall circuit efficiency without affecting optical or mechanical performance.