LED XLAMP XRCWHT-L1-0000-008A4 Equivalent & Substitute Parts

Part Overview

The XRCWHT-L1-0000-008A4 is a CreeLED XLamp® XR-C neutral white LED (4000K) in 3529 surface mount package. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The XLamp® XR-C series has been superseded by the XLamp® XR-E series, which maintains compatible electrical and mechanical specifications while offering improved thermal performance and active product status.

Key Parameters

Parameter	Value
Color / CCT	White, Neutral 4000K
Forward Voltage (Vf) Typical	4.6V
Test Current	350mA
Luminous Flux @ 25°C	77lm (74lm – 81lm)
Lumens per Watt	63 lm/W
Viewing Angle	90°
Package / Case	3529 (9073 Metric)
Mounting Type	Surface Mount
Size	0.354" L × 0.276" W (9.00mm × 7.00mm)
Height – Seated (Max)	0.181" (4.60mm)
RoHS Status	RoHS Compliant
MSL Rating	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution of the XRCWHT-L1-0000-008A4 is determined by the following critical parameters:

Color and Correlated Color Temperature (CCT): Both substitute parts maintain 4000K neutral white specification
Package and Mechanical Compatibility: All parts use identical 3529 (9073 Metric) surface mount package with matching footprint dimensions (9.00mm × 7.00mm) and seated height (4.60mm)
Electrical Performance: Test current (350mA) and luminous flux output (77lm at 25°C) are identical across all parts
Viewing Angle: 90° specification is consistent
Compliance: All parts are RoHS compliant with MSL 4 rating

The substitute parts differ in forward voltage (3.3V vs. 4.6V) and thermal resistance, representing generational improvements within the XLamp® product line while maintaining functional equivalence for the specified application parameters.

Parameter Comparison

Parameter	XRCWHT-L1-0000-008A4 (Main)	XREWHT-L1-0000-008A4 (Substitute)	XREWHT-L1-R250-008A4 (Substitute)
Series	XLamp® XR-C	XLamp® XR-E	XLamp® XR-E
Product Status	Obsolete	Active	Active
Color / CCT	White, Neutral 4000K	White, Neutral 4000K	White, Neutral 4000K
Forward Voltage (Vf) Typical	4.6V	3.3V	3.3V
Test Current	350mA	350mA	350mA
Luminous Flux @ 25°C	77lm (74lm – 81lm)	77lm (74lm – 81lm)	77lm (74lm – 81lm)
Lumens per Watt	63 lm/W	67 lm/W	67 lm/W
Viewing Angle	90°	90°	90°
Package / Case	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)
Size	0.354" L × 0.276" W (9.00mm × 7.00mm)	0.354" L × 0.276" W (9.00mm × 7.00mm)	0.354" L × 0.276" W (9.00mm × 7.00mm)
Height – Seated (Max)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)
Thermal Resistance	12°C/W	8°C/W	8°C/W
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant
MSL Rating	4 (72 Hours)	4 (72 Hours)	4 (72 Hours)
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Both XREWHT-L1-0000-008A4 and XREWHT-L1-R250-008A4 are direct functional equivalents for the obsolete XRCWHT-L1-0000-008A4. Selection between substitute parts is based on the following factors:

Product Status: The substitute parts carry active product status, ensuring continued availability and supply chain stability compared to the obsolete main part.

Compliance and Certifications: All parts maintain identical RoHS compliance, REACH unaffected status, and MSL 4 rating, ensuring regulatory and environmental compatibility.

Thermal Performance: The XLamp® XR-E substitutes provide improved thermal resistance (8°C/W vs. 12°C/W), resulting in lower junction temperatures under identical operating conditions.

Packaging Format: XREWHT-L1-0000-008A4 and XREWHT-L1-R250-008A4 are supplied in Tape & Reel format, standard for automated assembly operations. The main part was supplied in bulk packaging.

Electrical Characteristics: Forward voltage is reduced from 4.6V to 3.3V in the substitute parts, resulting in lower power dissipation and improved efficiency (67 lm/W vs. 63 lm/W) while maintaining identical luminous flux output.

Frequently Asked Questions (FAQ)

Q: Can XREWHT-L1-0000-008A4 and XREWHT-L1-R250-008A4 be used interchangeably with XRCWHT-L1-0000-008A4?

A: Yes. Both substitute parts maintain identical color temperature (4000K), luminous flux (77lm), viewing angle (90°), and 3529 package dimensions. The lower forward voltage (3.3V vs. 4.6V) and improved thermal resistance represent performance enhancements rather than incompatibilities.

Q: What is the difference between XREWHT-L1-0000-008A4 and XREWHT-L1-R250-008A4?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format designation. Both are supplied in Tape & Reel (TR) format for automated assembly.

Q: Will the reduced forward voltage (3.3V vs. 4.6V) affect circuit design?

A: Circuit designs must accommodate the specified forward voltage range. The 0.2V reduction in typical forward voltage will decrease power dissipation in current-limited applications. Verify that existing current-limiting resistor or driver circuits remain within acceptable operating parameters for the lower voltage specification.

Q: Are the substitute parts compatible with existing PCB layouts designed for XRCWHT-L1-0000-008A4?

A: Yes. The 3529 package footprint, dimensions (9.00mm × 7.00mm), and seated height (4.60mm) are identical, ensuring direct PCB compatibility without layout modifications.

Q: What is the significance of the improved thermal resistance (8°C/W vs. 12°C/W)?

A: Lower thermal resistance results in reduced junction temperature rise for the same power dissipation. This improves LED reliability and color stability over extended operating periods.

Q: Are all parts RoHS compliant?

A: Yes. XRCWHT-L1-0000-008A4, XREWHT-L1-0000-008A4, and XREWHT-L1-R250-008A4 are all RoHS compliant with identical MSL 4 (72 Hours) moisture sensitivity ratings.

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