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XRCWHT-L1-0000-00937 LED XLamp® XR-C Cool White SMD Equivalent & Substitute Parts
Part Overview
The XRCWHT-L1-0000-00937 is a CreeLED XLamp® XR-C cool white surface mount LED in 3529 (9073 metric) package. This part is classified as obsolete. Due to its discontinued status, equivalent substitute parts from the active XLamp® XR-E product line are available with compatible electrical and mechanical specifications. Substitutes maintain the same luminous flux output, viewing angle, package dimensions, and thermal characteristics while offering improved efficiency and extended current rating capabilities.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | XRCWHT-L1-0000-00937 |
| Manufacturer | CreeLED, Inc. |
| Series | XLamp® XR-C |
| Product Status | Obsolete |
| Color | White |
| Flux @ 25°C, 350mA | 84 lm (81–87 lm range) |
| Forward Voltage (Vf) | 4.6V |
| Test Current | 350 mA |
| Maximum Current | 500 mA |
| Lumens/Watt @ 350mA | 69 lm/W |
| Viewing Angle | 90° |
| Package / Case | 3529 (9073 Metric) |
| Dimensions | 9.00 mm L × 7.00 mm W × 4.60 mm H (max) |
| Thermal Resistance | 12°C/W |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS Compliant |
| MSL Rating | 4 (72 Hours) |
Substitute Part Grouping Explanation
Substitution is determined by the following critical parameters that must remain constant or compatible:
- Package / Case: 3529 (9073 metric) — identical footprint and mounting interface
- Viewing Angle: 90° — same light distribution pattern
- Luminous Flux @ 25°C, 350mA: 84 lm (81–87 lm range) — equivalent light output
- Test Current: 350 mA — standard operating point
- Dimensions: 9.00 mm × 7.00 mm × 4.60 mm max height — mechanical compatibility
- Thermal Resistance: 8–12°C/W — acceptable thermal performance range
- Mounting Type: Surface Mount — same assembly process
- RoHS & MSL Compliance: Maintained across all substitutes
All substitute parts listed are from the active XLamp® XR-E series, which shares identical mechanical and thermal specifications with the obsolete XR-C part. The XR-E variants differ in forward voltage (3.3V vs. 4.6V) and maximum current rating (1A vs. 500mA), representing performance improvements. Luminous flux output and efficiency remain equivalent at the 350mA test current.
Parameter Comparison
| Parameter | XRCWHT-L1-0000-00937 (Main) | XREWHT-L1-0000-00901 | XREWHT-L1-0000-00905 | XREWHT-L1-0000-00907 | XREWHT-L1-0000-00908 | XREWHT-L1-0000-00909 | XREWHT-L1-0000-00910 | XREWHT-L1-0000-00937 | XREWHT-L1-0000-009B1 | XREWHT-L1-0000-009B2 | XREWHT-L1-0000-009B3 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Series | XLamp® XR-C | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E | XLamp® XR-E |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| Color | White | White, Cool | White | White | White | White | White | White | White | White | White |
| Flux @ 25°C, 350mA (lm) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) | 84 (81–87) |
| Forward Voltage (Vf) | 4.6V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Test Current | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA | 350 mA |
| Lumens/Watt @ 350mA | 69 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W | 73 lm/W |
| Viewing Angle | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° |
| Package / Case | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) | 3529 (9073) |
| Dimensions (L × W × H) | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm | 9.00 × 7.00 × 4.60 mm |
| Thermal Resistance | 12°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W | 8°C/W |
| Maximum Current | 500 mA | 1 A | — | — | — | — | — | — | — | — | — |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
| MSL Rating | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) | 4 (72 Hours) |
Engineering Selection Recommendations
All listed XLamp® XR-E substitutes are active production parts from CreeLED, Inc., ensuring long-term availability and supply chain stability. The primary electrical difference is forward voltage: XR-E parts operate at 3.3V compared to the original XR-C specification of 4.6V. This 0.2V reduction results in lower power dissipation and improved efficiency (73 lm/W vs. 69 lm/W) while maintaining identical luminous flux output at 350mA test current.
Thermal performance improves with XR-E substitutes, offering 8°C/W thermal resistance versus 12°C/W for the original part. This enhancement supports better heat dissipation in thermal-constrained applications.
All substitute parts maintain identical mechanical compatibility: 3529 package footprint, 90° viewing angle, 4.60mm maximum height, and MSL 4 moisture sensitivity rating. Surface mount assembly processes require no modification.
XREWHT-L1-0000-00901 is the only substitute with specified maximum current rating (1A), providing extended operational headroom. Remaining XR-E variants do not list maximum current specifications but share identical electrical and thermal characteristics at the 350mA test point.
RoHS compliance and REACH unaffected status are maintained across all parts, supporting regulatory requirements for EU and global markets.
Frequently Asked Questions (FAQ)
Q: Can XREWHT-L1-0000-00937 (XR-E) directly replace XRCWHT-L1-0000-00937 (XR-C) without circuit modification?
A: Direct substitution is mechanically and thermally compatible. However, the 0.2V forward voltage difference (3.3V vs. 4.6V) requires circuit evaluation. If the original design uses a current-limiting resistor or constant-current driver, the lower voltage drop may increase LED current slightly. Verify that the drive circuit maintains 350mA nominal operation or adjust series resistance accordingly.
Q: What is the difference between the multiple XR-E part numbers listed?
A: All listed XR-E substitutes share identical electrical specifications at the 350mA test point: 84 lm flux, 3.3V forward voltage, 73 lm/W efficiency, and 90° viewing angle. The part number variations (00905, 00907, 00908, 00909, 00910, 00937, 009B1, 009B2, 009B3) represent different manufacturing lots or internal binning codes. From an engineering perspective, they are functionally equivalent for substitution purposes.
Q: Are there any thermal management differences between the original and substitute parts?
A: Yes. The XR-E substitutes feature improved thermal resistance of 8°C/W compared to the original 12°C/W. This represents a 33% improvement in heat dissipation capability. In applications with thermal constraints, XR-E parts will operate at lower junction temperatures under identical current and ambient conditions, extending LED lifetime and maintaining color stability.
Q: Does the lower forward voltage of XR-E parts affect power consumption?
A: At 350mA test current, the XR-E parts consume approximately 1.155W (3.3V × 350mA) versus 1.225W for the original (4.6V × 350mA). This represents a 5.7% reduction in power dissipation while maintaining identical luminous output, resulting in the improved 73 lm/W efficiency rating.
Q: Are all substitute parts available in the same packaging format?
A: All XR-E substitutes are supplied in Tape & Reel (TR) format, whereas the original XRCWHT-L1-0000-00937 was available in standard packaging. Verify that your assembly process accommodates tape and reel delivery. Minimum order quantities and lead times may differ from the original part.
Q: What is the significance of the CCT (Color Correlated Temperature) specification?
A: The original XRCWHT-L1-0000-00937 does not specify CCT. XREWHT-L1-0000-00901 specifies 5000K–10000K (cool white range). Remaining XR-E substitutes do not list CCT values. If color temperature is critical to your application, XREWHT-L1-0000-00901 is the only substitute with defined CCT specification. For applications without strict color temperature requirements, all substitutes are equivalent.
Q: Is CRI (Color Rendering Index) important for this substitution?
A: The original part does not specify CRI. Only XREWHT-L1-0000-00901 specifies CRI 75 (typical). If color rendering quality is required, XREWHT-L1-0000-00901 is the recommended choice. Other XR-E variants do not list CRI specifications and should be evaluated against your application requirements.
Q: Can I use these substitutes in high-current applications beyond 350mA?
A: Only XREWHT-L1-0000-00901 specifies a maximum current rating of 1A. Other XR-E substitutes do not list maximum current specifications. Operation beyond 350mA for parts without specified maximum ratings is not recommended without manufacturer guidance. For applications requiring currents above 500mA, XREWHT-L1-0000-00901 is the only listed substitute with documented 1A capability.
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