LED XLAMP WARM WHITE 2850K XRCWHT-L1-0000-004A9 Equivalent & Substitute Parts

Part Overview

The XRCWHT-L1-0000-004A9 is a Cree XLamp® XR-C series warm white LED (2850K) designed for surface mount applications in the 3529 (9073 Metric) package. This part is classified as obsolete, making identification of compatible substitute components essential for ongoing production and maintenance applications. The XR-C series has been superseded by newer generations within the XLamp® product line, requiring engineers to evaluate functionally equivalent alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

XRCWHT-L1-0000-004A9

CreeLED, Inc.In Stock: 1016XRCWHT-L1-0000-004A9 Datasheet

Current PartRFQ

XREWHT-L1-0000-005A9

CreeLED, Inc.In Stock: 682XREWHT-L1-0000-005A9 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete XRCWHT-L1-0000-004A9 is based on strict alignment of the following critical parameters:

Electrical Compatibility:

• Color temperature: 2850K warm white (mandatory match)
• Forward voltage range: 3.3V–4.6V (acceptable tolerance for series operation)
• Test current: 350mA nominal operation
• Maximum current rating: ≥500mA (ensures safe operation margin)

Mechanical Compatibility:

• Package type: 3529 (9073 Metric) surface mount
• Footprint dimensions: 9.00mm × 7.00mm (identical)
• Height: 4.60mm maximum seated height (identical)
• Mounting type: Surface mount (identical)

Regulatory & Quality:

• RoHS compliance (mandatory for equivalent substitution)
• MSL rating: 4 (72 Hours) or equivalent
• Manufacturer: CreeLED, Inc. (same manufacturer ecosystem)

The substitute XREWHT-L1-0000-005A9 meets all substitution criteria, representing an upgrade within the same manufacturer's product line (XR-E series) with improved performance characteristics while maintaining full mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: XREWHT-L1-0000-005A9

The XREWHT-L1-0000-005A9 is the qualified substitute for the obsolete XRCWHT-L1-0000-004A9. Selection is based on the following engineering criteria:

Product Status & Availability: The substitute is in active production status, ensuring long-term supply chain continuity and availability. The main part is obsolete, making the substitute the only viable path for ongoing procurement.

Electrical Compatibility: Forward voltage difference of 0.2V (4.6V vs. 3.3V) is within acceptable tolerance for series-connected LED applications. Both parts operate at identical test current (350mA) and maintain the same color temperature (2850K). The substitute's higher maximum current rating (700mA vs. 500mA) provides additional operational margin.

Mechanical Compatibility: Identical package footprint (3529 / 9073 Metric), dimensions (9.00mm × 7.00mm), and seated height (4.60mm) ensure direct PCB compatibility without layout modifications.

Performance Enhancement: The substitute delivers improved luminous flux (59lm vs. 54lm at 350mA) and efficiency (51 lm/W vs. 44 lm/W), with superior thermal resistance (8°C/W vs. 12°C/W). These improvements represent a generational upgrade within the XLamp® product line.

Regulatory Compliance: Both parts maintain identical RoHS compliance, MSL rating (4 / 72 Hours), and REACH status, ensuring no regulatory or quality assurance complications in substitution.

Frequently Asked Questions (FAQ)

Q: Can the XREWHT-L1-0000-005A9 be used as a direct replacement for the XRCWHT-L1-0000-004A9 without circuit modifications?

A: Yes. The substitute maintains identical package geometry, footprint, viewing angle (90°), and color temperature (2850K). The 0.2V forward voltage difference (4.6V to 3.3V) is within acceptable tolerance for standard LED driver circuits. No PCB layout or schematic changes are required.

Q: What is the impact of the forward voltage difference on circuit performance?

A: The substitute's lower forward voltage (3.3V vs. 4.6V) results in slightly lower voltage drop across the LED. In constant-current driver circuits, this difference is automatically compensated. In voltage-regulated circuits, the 0.2V reduction may result in marginally lower power dissipation, which is beneficial for thermal management.

Q: Does the substitute provide better performance than the original part?

A: The substitute delivers measurable improvements: 10% higher luminous flux (59lm vs. 54lm), 16% higher efficiency (51 lm/W vs. 44 lm/W), and superior thermal resistance (8°C/W vs. 12°C/W). These represent a generational advancement within the XLamp® product family.

Q: Are there any packaging or handling differences between the two parts?

A: Both parts share identical MSL rating (4 / 72 Hours) and RoHS compliance. The substitute is supplied in Tape & Reel (TR) packaging, which is standard for production environments. Storage and handling procedures remain unchanged.

Q: What is the thermal performance difference, and does it matter for my application?

A: The substitute's thermal resistance is 33% lower (8°C/W vs. 12°C/W). This means the LED junction temperature will be approximately 4°C lower at identical power dissipation. For applications with thermal constraints or extended operating life requirements, this improvement is significant.

Q: Is the substitute available in the same quantities as the original part?

A: Current inventory shows 668 units of the substitute (XREWHT-L1-0000-005A9) in stock, compared to 925 units of the obsolete part. The substitute is in active production, ensuring ongoing availability for future procurement cycles.

Q: Can I mix the original and substitute parts in the same production batch?

A: Yes. Both parts are electrically and mechanically compatible. However, the luminous flux difference (54lm vs. 59lm) may result in minor brightness variation if mixed in the same assembly. For color-critical or brightness-matched applications, segregation by part number is recommended.