Equivalent & Substitute Parts for XRCWHT-L1-0000-006B8

Part Overview

The XRCWHT-L1-0000-006B8 is an XLamp® XR-C warm white surface mount LED in 3529 (9073 Metric) package format, rated at 4.6V forward voltage and 350mA test current. This part is classified as obsolete, making substitute components necessary for new designs and production continuity. The XLamp® XR-C series has been superseded by the XLamp® XR-E series, which maintains electrical and mechanical compatibility while offering improved thermal performance and active product status.

Key Parameters

Parameter	Value
Manufacturer Part Number	XRCWHT-L1-0000-006B8
Manufacturer	CreeLED, Inc.
Series	XLamp® XR-C
Product Status	Obsolete
Color	White
Flux @ 25°C, 350mA	65lm (62lm ~ 67lm)
Forward Voltage (Typ)	4.6V
Test Current	350mA
Maximum Current	500mA
Lumens/Watt @ 350mA	53 lm/W
Viewing Angle	90°
Package / Case	3529 (9073 Metric)
Size / Dimension	0.354" L x 0.276" W (9.00mm x 7.00mm)
Height - Seated (Max)	0.181" (4.60mm)
Thermal Resistance	12°C/W
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL Rating	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution of XRCWHT-L1-0000-006B8 is determined by the following critical parameters:

Mechanical Compatibility: Package type (3529/9073 Metric), physical dimensions (9.00mm x 7.00mm), and maximum seated height (4.60mm) must remain identical to ensure PCB layout and assembly compatibility.

Electrical Compatibility: Flux output at 25°C and 350mA test current (65lm nominal range 62lm–67lm), viewing angle (90°), and mounting type (Surface Mount, SMD) must match.

Thermal Performance: Thermal resistance of the package affects junction temperature rise and long-term reliability.

Voltage Tolerance: Forward voltage variation between 3.3V and 4.6V is acceptable within typical LED circuit design margins, as both values fall within standard power supply regulation ranges.

Regulatory Compliance: RoHS compliance and MSL rating must be maintained.

All substitute parts listed below meet these criteria. The XLamp® XR-E series substitutes offer improved thermal resistance (8°C/W versus 12°C/W) and active product status while maintaining identical mechanical form factor and electrical performance at the specified test current.

Parameter Comparison

Part Number	Series	Status	Vf (Typ)	Flux @ 25°C, 350mA	lm/W @ 350mA	Viewing Angle	Thermal Resistance	Package	Inventory
XRCWHT-L1-0000-006B8	XLamp® XR-C	Obsolete	4.6V	65lm (62–67lm)	53 lm/W	90°	12°C/W	3529 (9073)	683 Pcs
XREWHT-L1-0000-006E8	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	708 Pcs
XREWHT-L1-0000-006B1	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	749 Pcs
XREWHT-L1-0000-006B2	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	1039 Pcs
XREWHT-L1-0000-006B3	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	1056 Pcs
XREWHT-L1-0000-006B4	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	982 Pcs
XREWHT-L1-0000-006B5	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	918 Pcs
XREWHT-L1-0000-006B6	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	778 Pcs
XREWHT-L1-0000-006B7	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	899 Pcs
XREWHT-L1-0000-006B8	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	648 Pcs
XREWHT-L1-0000-006B9	XLamp® XR-E	Active	3.3V	65lm (62–67lm)	56 lm/W	90°	8°C/W	3529 (9073)	739 Pcs

Engineering Selection Recommendations

Primary Substitutes (Recommended): XREWHT-L1-0000-006B1, XREWHT-L1-0000-006B2, XREWHT-L1-0000-006B3, XREWHT-L1-0000-006B4, XREWHT-L1-0000-006B5, XREWHT-L1-0000-006B6, XREWHT-L1-0000-006B7, XREWHT-L1-0000-006B8, and XREWHT-L1-0000-006B9 are all XLamp® XR-E series parts with active product status. These parts maintain identical mechanical compatibility, identical flux output at the specified test current, and identical viewing angle. All are RoHS compliant with MSL 4 rating. The forward voltage reduction from 4.6V to 3.3V is within standard circuit design tolerance and results in improved efficiency (56 lm/W versus 53 lm/W). Thermal resistance improvement (8°C/W versus 12°C/W) provides superior thermal performance for extended operating life.

Alternative Substitute: XREWHT-L1-0000-006E8 is an XLamp® XR-E warm white variant with 2700K color temperature specification. This part meets all mechanical and electrical compatibility requirements and offers the same thermal and efficiency improvements as other XR-E substitutes. Selection of this part is appropriate when warm white color temperature (2700K) with CRI 80 is specified in the application.

Compliance Status: All substitute parts maintain RoHS compliance and REACH unaffected status. MSL 4 (72 Hours) rating is consistent across all parts, requiring identical moisture control during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can XREWHT-L1-0000-006B series parts directly replace XRCWHT-L1-0000-006B8 on existing PCBs?

A: Yes. All XLamp® XR-E substitute parts use identical 3529 (9073 Metric) package format with matching physical dimensions (9.00mm x 7.00mm) and maximum seated height (4.60mm). No PCB layout modification is required.

Q: What is the impact of the 0.2V forward voltage difference (4.6V to 3.3V)?

A: The voltage reduction is within standard LED circuit design margins. Most constant-current LED drivers and power supplies accommodate this variation without circuit modification. If the application uses a fixed voltage source with tight tolerance, circuit analysis is required to confirm adequate current delivery at 3.3V.

Q: Why do the XLamp® XR-E substitutes show improved thermal resistance (8°C/W versus 12°C/W)?

A: Thermal resistance is a package-level characteristic determined by die attachment, thermal interface materials, and substrate design. The XLamp® XR-E series incorporates improved thermal management, resulting in lower junction temperature rise at equivalent power dissipation. This improves reliability and extends operational life.

Q: Are all XLamp® XR-E white variants electrically interchangeable?

A: Yes, for the purposes of this substitution. All listed XLamp® XR-E parts (XREWHT-L1-0000-006B1 through 006B9) share identical electrical specifications at the 350mA test current: 3.3V forward voltage, 65lm flux output, 56 lm/W efficiency, and 90° viewing angle. Differences in part number suffix reflect internal binning or manufacturing lot variations that do not affect electrical performance within specified ranges.

Q: What is the difference between XREWHT-L1-0000-006E8 and the other XLamp® XR-E substitutes?

A: XREWHT-L1-0000-006E8 is specified as warm white with 2700K color temperature and CRI 80 (Typ). The other XLamp® XR-E parts (006B series) do not have CCT or CRI specifications provided. If the application requires warm white color temperature with defined CRI performance, XREWHT-L1-0000-006E8 is the appropriate selection. If color temperature is not specified, any of the listed XLamp® XR-E parts are suitable.

Q: Is moisture sensitivity level (MSL) rating identical across all parts?

A: Yes. All parts, including the original XRCWHT-L1-0000-006B8 and all XLamp® XR-E substitutes, carry MSL 4 (72 Hours) rating. Identical moisture control procedures during storage, handling, and assembly are required.

Q: Which substitute part has the highest current inventory availability?

A: XREWHT-L1-0000-006B3 has the highest inventory at 1056 pieces, followed by XREWHT-L1-0000-006B2 at 1039 pieces. Both are active status parts with identical electrical and mechanical specifications.

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