XRCWHT-L1-0000-004B8 Equivalent & Substitute Parts

Part Overview

The XRCWHT-L1-0000-004B8 is a CreeLED XLamp® XR-C warm white LED in 3529 surface mount package. This part is classified as obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications. The XLamp® XR-C series has been superseded by newer generations within the CreeLED product line, requiring engineers to evaluate functionally equivalent alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

XRCWHT-L1-0000-004B8

CreeLED, Inc.In Stock: 1046XRCWHT-L1-0000-004B8 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-L1-0000-004B8 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 footprint compatibility.

Electrical Compatibility: Forward voltage (Vf) tolerance, test current rating (350mA nominal operation), and maximum current rating must support the existing circuit design without requiring modifications to current-limiting resistors or power supply specifications.

Optical Performance: Luminous flux output at 25°C and 350mA test current must fall within acceptable ranges for the application. Color specification (white) and viewing angle (90°) define the optical characteristics.

Regulatory Compliance: RoHS compliance and MSL rating must be maintained to ensure manufacturing process compatibility and long-term reliability.

The XREWHT-L1-0000-004E8 qualifies as a substitute based on identical mechanical packaging, compatible electrical parameters within the specified operating range, equivalent optical output, and maintained regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The XREWHT-L1-0000-004E8 is the designated substitute for the obsolete XRCWHT-L1-0000-004B8. Both components maintain RoHS compliance and identical MSL ratings, ensuring compatibility with existing manufacturing processes and supply chain requirements.

The substitute part operates at a lower forward voltage (3.3V vs. 4.6V), which reduces power dissipation in current-limiting circuits. The improved thermal resistance (8°C/W vs. 12°C/W) provides better heat management. Both parts deliver identical luminous flux at the standard 350mA test current, maintaining optical performance in the application.

The XREWHT-L1-0000-004E8 is classified as active product status, ensuring long-term availability and continued manufacturing support. The XLamp® XR-E series represents the current generation within the CreeLED product portfolio for this package and performance class.

Frequently Asked Questions (FAQ)

Q: Can the XREWHT-L1-0000-004E8 be used as a direct replacement without circuit modifications?

A: The substitute part is mechanically and electrically compatible with identical package dimensions and equivalent luminous flux output. The lower forward voltage (3.3V vs. 4.6V) may require adjustment of current-limiting resistor values to maintain the same operating current. Verify circuit design parameters before implementation.

Q: What is the significance of the different forward voltage specifications?

A: The XREWHT-L1-0000-004E8 operates at 3.3V compared to the original 4.6V. This 0.2V difference affects the voltage drop across the LED in series circuits. Current-limiting resistor calculations must account for this change to maintain proper LED current and brightness levels.

Q: Are the package dimensions identical between the main part and substitute?

A: Yes. Both the XRCWHT-L1-0000-004B8 and XREWHT-L1-0000-004E8 use the 3529 (9073 Metric) package with identical footprint dimensions (9.00mm x 7.00mm) and maximum seated height (4.60mm). PCB layout and assembly tooling require no modification.

Q: What does the CCT specification of 2700K on the substitute part indicate?

A: The XREWHT-L1-0000-004E8 specifies a correlated color temperature of 2700K, indicating warm white light output. The original XRCWHT-L1-0000-004B8 does not specify CCT. If color temperature consistency is critical to the application, this parameter must be evaluated against original design requirements.

Q: Why is the thermal resistance lower on the substitute part?

A: The XREWHT-L1-0000-004E8 has improved thermal resistance (8°C/W vs. 12°C/W), indicating better heat dissipation characteristics. This enhancement reduces junction temperature rise during operation, improving reliability and potentially extending component lifespan under identical thermal conditions.

Q: Is the substitute part available in the same packaging format?

A: The XREWHT-L1-0000-004E8 is supplied in Tape & Reel (TR) format. Verify that your assembly process and equipment are compatible with this packaging specification. The original part packaging format is not specified in the provided data.