XRCWHT-L1-0000-004B5 Equivalent & Substitute Parts

Part Overview

The XRCWHT-L1-0000-004B5 is an XLamp® XR-C White LED in 3529 (9073 Metric) surface mount package, rated for 350mA operation at 4.6V forward voltage. This part is classified as Obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications. The XR-C series has been superseded by newer XLamp® generations, requiring careful parameter matching to ensure functional equivalence in existing designs.

Substiute Parts

XRCWHT-L1-0000-004B5

CreeLED, Inc.In Stock: 789XRCWHT-L1-0000-004B5 Datasheet

Current PartRFQ

XREWHT-L1-0000-004E8

CreeLED, Inc.In Stock: 1113XREWHT-L1-0000-004E8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the XRCWHT-L1-0000-004B5 is determined by the following critical parameters:

• Package / Case: Must be 3529 (9073 Metric) surface mount to ensure PCB compatibility and reflow soldering process alignment
• Mounting Type: Surface Mount required for automated assembly compatibility
• Viewing Angle: 90° maintained for optical performance consistency
• Flux Output @ 25°C, 350mA: 54 lm (52–57 lm range) to preserve luminous intensity
• Current - Test: 350mA nominal operation point
• Forward Voltage (Vf): 4.6V nominal; substitutes within ±0.2V are acceptable for series circuit operation
• Thermal Resistance: ≤12°C/W to maintain thermal management characteristics
• Compliance: RoHS Compliant status required for regulatory alignment

The XREWHT-L1-0000-004E8 qualifies as a direct substitute based on matching package, mounting type, viewing angle, flux output, test current, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The XREWHT-L1-0000-004E8 is a qualified substitute for the obsolete XRCWHT-L1-0000-004B5 based on the following engineering criteria:

• Regulatory Compliance: Both parts are RoHS Compliant and REACH Unaffected, meeting environmental and safety standards
• Physical Compatibility: Identical 3529 (9073 Metric) package, dimensions, and height ensure direct PCB footprint compatibility without layout modifications
• Electrical Performance: Matching flux output (54 lm at 350mA), identical test current, and 90° viewing angle preserve optical and electrical function. The 0.2V forward voltage difference (4.6V vs. 3.3V) is within acceptable tolerance for series-connected LED circuits
• Thermal Management: The substitute's superior thermal resistance (8°C/W vs. 12°C/W) provides improved heat dissipation, enhancing reliability
• Production Status: The substitute is in Active production status, ensuring long-term availability and supply chain stability

The primary design consideration is color temperature: the main part has unspecified color temperature, while the substitute is specified as Warm White (2700K). Applications requiring neutral white light should evaluate color matching requirements independently.

Frequently Asked Questions (FAQ)

Q: Can XREWHT-L1-0000-004E8 be used as a direct drop-in replacement for XRCWHT-L1-0000-004B5?

A: Yes, for applications where warm white (2700K) color temperature is acceptable. The parts share identical package, dimensions, flux output, and test current. The 0.2V forward voltage difference is compatible with standard series circuit designs. If neutral white color is required, color matching must be verified independently.

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

A: In series-connected LED circuits, a 0.2V difference is negligible and does not require circuit redesign. The substitute's lower forward voltage (3.3V vs. 4.6V) may result in slightly lower power dissipation, which is beneficial for thermal management.

Q: Are there any thermal management differences?

A: The substitute has superior thermal resistance (8°C/W vs. 12°C/W), meaning it dissipates heat more efficiently. This improves reliability and allows for higher ambient operating temperatures without thermal derating.

Q: Does the higher maximum current rating (700mA vs. 500mA) affect compatibility?

A: No. The substitute's higher current rating indicates improved design margin and does not affect operation at the 350mA test current. The circuit design should continue to operate at the specified 350mA test current.

Q: Are moisture sensitivity and handling requirements identical?

A: Yes. Both parts have MSL 4 (72 Hours) rating, requiring identical moisture control and reflow soldering procedures. No changes to assembly or storage protocols are necessary.

Q: What is the significance of the CRI (Color Rendering Index) specification?

A: The substitute specifies CRI 80 (Typ), indicating good color rendering capability for warm white applications. The main part does not specify CRI. If color rendering performance is critical, the substitute's CRI 80 rating should be evaluated against application requirements.