ASMF-LWG4-NRUDD Equivalent & Substitute Parts

Part Overview

The ASMF-LWG4-NRUDD is a neutral white LED (4000K) 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 28 lm at 65 mA test current with a forward voltage of 2.9V and 120° viewing angle, suitable for general lighting applications requiring neutral white color temperature.

Substiute Parts

ASMF-LWG4-NRUDD

Broadcom LimitedIn Stock: 777ASMF-LWG4-NRUDD Datasheet

Current PartRFQ

ASMF-LWG8-NTWDD

Broadcom LimitedIn Stock: 51175ASMF-LWG8-NTWDD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASMF-LWG4-NRUDD is based on strict alignment of the following electrical and mechanical parameters:

• Color and CCT: Neutral white 4000K (identical requirement)
• Package / Case: 1212 (3030 Metric) surface mount (identical form factor)
• Mounting Type: Surface mount (identical)
• Test Current: 65 mA (identical operating point)
• Maximum Current: 240 mA (identical rating)
• Viewing Angle: 120° (identical)
• RoHS and MSL Compliance: ROHS3 Compliant, MSL 3 (identical)

The substitute part ASMF-LWG8-NTWDD meets all these criteria while offering improved performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The ASMF-LWG8-NTWDD is the direct substitute for the obsolete ASMF-LWG4-NRUDD. Both parts are manufactured by Broadcom Limited and maintain identical electrical and mechanical specifications at the 65 mA test current, including color temperature (4000K), package form factor (1212/3030 Metric), viewing angle (120°), and compliance certifications (ROHS3, MSL 3).

The ASMF-LWG8-NTWDD offers the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• Improved luminous efficacy (170 lm/W versus 149 lm/W)
• Higher typical flux output (31 lm versus 28 lm at 65 mA)
• Lower thermal resistance (10°C/W versus 15°C/W)
• Slightly lower forward voltage (2.8V versus 2.9V)

Both parts maintain identical maximum current ratings (240 mA), CRI (80), and compliance requirements, confirming direct substitutability in existing designs without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can ASMF-LWG8-NTWDD be used as a direct replacement for ASMF-LWG4-NRUDD in existing PCB designs?

A: Yes. Both parts share identical package dimensions (1212/3030 Metric), mounting type (surface mount), electrical ratings at test current (65 mA, 2.8–2.9V forward voltage range), and color specification (neutral white 4000K). No PCB layout or circuit modifications are required.

Q: What is the difference in forward voltage between these parts?

A: The ASMF-LWG4-NRUDD has a typical forward voltage of 2.9V, while the ASMF-LWG8-NTWDD is 2.8V. This 0.1V difference is within typical LED tolerance ranges and does not require circuit redesign for standard current-limiting applications.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant, carry MSL 3 (168 Hours) moisture sensitivity ratings, and share identical ECCN (EAR99) and HTSUS classifications.

Q: Why does the ASMF-LWG8-NTWDD have better thermal performance?

A: The ASMF-LWG8-NTWDD features a thermal resistance of 10°C/W compared to 15°C/W for the ASMF-LWG4-NRUDD. This represents an improved thermal design in the substitute part, resulting in lower junction temperatures under identical operating conditions.

Q: Is the luminous flux difference significant for application compatibility?

A: The ASMF-LWG8-NTWDD provides 31 lm typical output versus 28 lm for the ASMF-LWG4-NRUDD at 65 mA test current. This represents approximately 10% higher output. For applications with strict flux requirements, this difference should be evaluated against design specifications, though both parts operate within the same general performance class for neutral white 4000K lighting.

Q: What is the packaging difference between these parts?

A: The ASMF-LWG4-NRUDD is supplied in standard packaging, while the ASMF-LWG8-NTWDD is supplied in Tape & Reel (TR) format. Both use identical component packages (1212/3030 Metric). Tape & Reel packaging is standard for high-volume production and automated assembly processes.