XRCWHT-L1-0000-00637 LED XLamp® XR-C White SMD Equivalent & Substitute Parts

Part Overview

The XRCWHT-L1-0000-00637 is a CreeLED XLamp® XR-C white surface mount LED in 3529 (9073 Metric) package format. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design updates. The XLamp® XR-C series has been superseded by the XLamp® XR-E series, which maintains compatible electrical and mechanical specifications while offering improved performance characteristics and active product status.

Key Parameters

Parameter	Value
Manufacturer Part Number	XRCWHT-L1-0000-00637
Manufacturer	CreeLED, Inc.
Series	XLamp® XR-C
Product Status	Obsolete
Color	White
Flux @ 25°C, 350mA	65lm (62lm ~ 67lm)
Forward Voltage (Vf) Typical	4.6V
Test Current	350mA
Maximum Current	500mA
Lumens/Watt @ 350mA	53 lm/W
Viewing Angle	90°
Package / Case	3529 (9073 Metric)
Mounting Type	Surface Mount
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
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution of the XRCWHT-L1-0000-00637 is based on the following critical parameters that must remain compatible:

Mechanical Compatibility:

Package / Case: 3529 (9073 Metric) — identical across all substitutes
Mounting Type: Surface Mount — all substitutes are surface mount
Size / Dimension: 0.354" L x 0.276" W (9.00mm x 7.00mm) — identical footprint
Height - Seated (Max): 0.181" (4.60mm) — identical height

Electrical Compatibility:

Flux @ 25°C, 350mA: 65lm (62lm ~ 67lm) — all substitutes maintain this luminous flux range
Test Current: 350mA — standard operating current across all parts
Viewing Angle: 90° — identical optical characteristics
Color: White — all substitutes are white LEDs

Regulatory & Environmental:

RoHS Compliant — all substitutes maintain RoHS compliance
Moisture Sensitivity Level (MSL): 4 (72 Hours) — identical handling requirements
REACH Status: REACH Unaffected — consistent across all parts

The primary difference between the main part (XLamp® XR-C) and substitute parts (XLamp® XR-E series) is the forward voltage and thermal resistance. The XR-E series operates at 3.3V typical (versus 4.6V for XR-C) and provides improved thermal performance (8°C/W versus 12°C/W). These differences represent improvements in efficiency and thermal management, making XR-E substitutes functionally superior while maintaining full mechanical and optical compatibility.

Parameter Comparison

Parameter	XRCWHT-L1-0000-00637 (Main)	XREWHT-L1-0000-00601	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	XREWHT-L1-0000-006B9
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	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)	65lm (62lm ~ 67lm)
Forward Voltage (Vf) Typical	4.6V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V
Test Current	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA	350mA
Lumens/Watt @ 350mA	53 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W	56 lm/W
Viewing Angle	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°
Package / Case	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)	3529 (9073 Metric)
Size / Dimension	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)	0.354" L x 0.276" W (9.00mm x 7.00mm)
Height - Seated (Max)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)	0.181" (4.60mm)
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
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	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 substitute parts are active products with full RoHS compliance and identical MSL ratings. The XR-E series represents the current generation replacement for the obsolete XR-C series. Selection among the XR-E variants should be based on application-specific requirements not differentiated in the provided parameters.

The forward voltage reduction from 4.6V to 3.3V in XR-E substitutes results in lower power dissipation and improved thermal performance (8°C/W versus 12°C/W). Circuit designs operating at fixed current (350mA) will experience reduced voltage drop across the LED, requiring adjustment of series resistor values or current-limiting circuit parameters to maintain identical operating conditions.

All substitute parts maintain identical mechanical compatibility, optical characteristics (90° viewing angle), and luminous flux output (65lm at 350mA, 25°C). Direct PCB footprint compatibility is assured across all parts in this substitution group.

Frequently Asked Questions (FAQ)

Q: Can XLamp® XR-E parts directly replace XLamp® XR-C in existing designs?

A: Mechanical and optical compatibility is direct. However, the forward voltage difference (3.3V versus 4.6V) requires circuit adjustment. Current-limiting resistor values must be recalculated to maintain 350mA test current. Designs using constant-current drivers will operate without modification.

Q: Are all XR-E substitute parts electrically interchangeable?

A: Yes. All listed XR-E variants maintain identical electrical specifications at the 350mA test current: 65lm luminous flux, 3.3V forward voltage, 56 lm/W efficiency, and 90° viewing angle. Differences in part numbering reflect internal binning or manufacturing date codes not affecting electrical performance.

Q: What is the impact of improved thermal resistance in XR-E parts?

A: The reduction from 12°C/W to 8°C/W thermal resistance means XR-E parts dissipate heat more efficiently. For equivalent operating currents, junction temperature will be lower, extending LED lifetime and improving color stability.

Q: Are there packaging differences between XR-C and XR-E?

A: No. Both series use identical 3529 (9073 Metric) surface mount packages with matching footprints (9.00mm × 7.00mm) and heights (4.60mm maximum). PCB layout modifications are not required.

Q: Do all substitute parts have the same inventory status?

A: All listed XR-E substitutes are active products with current manufacturing status. The original XRCWHT-L1-0000-00637 is obsolete. Availability of specific XR-E variants should be confirmed with the supplier.

Q: What compliance certifications apply to these parts?

A: All parts are RoHS Compliant and REACH Unaffected. Moisture sensitivity level is MSL 4 (72 Hours) across all variants, requiring identical handling and storage protocols.

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