ASMT-QWBE-NFHCE LED Cool White 5300K 4-PLCC Equivalent & Substitute Parts

Part Overview

The ASMT-QWBE-NFHCE is a cool white LED (5300K) manufactured by Broadcom Limited in a 4-PLCC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part delivers 24lm at 25°C under 150mA test current with a forward voltage of 3.6V and 120° viewing angle, suitable for indicator and general lighting applications requiring cool white color temperature.

Substiute Parts

ASMT-QWBE-NFHCE

Broadcom LimitedIn Stock: 644ASMT-QWBE-NFHCE Datasheet

Current PartRFQ

CLA1A-MKW-CWBYA513

CreeLED, Inc.In Stock: 870CLA1A-MKW-CWBYA513 Datasheet

MFR RecommendedRFQ

CLA2A-WKW-CXBZ0153

CreeLED, Inc.In Stock: 3267CLA2A-WKW-CXBZ0153 Datasheet

MFR RecommendedRFQ

CLA2A-WKW-CYAZ0453

CreeLED, Inc.In Stock: 1062CLA2A-WKW-CYAZ0453 Datasheet

MFR RecommendedRFQ

CLA2A-WKW-CYBZ0343

CreeLED, Inc.In Stock: 5982CLA2A-WKW-CYBZ0343 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ASMT-QWBE-NFHCE is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package type: 4-PLCC (mandatory for mechanical and electrical compatibility)
• Color temperature: Cool white in the 5000K–5600K range
• Mounting type: Surface mount
• Physical dimensions: 3.20mm L x 2.80mm W with 2.10mm maximum height
• Voltage compatibility: Forward voltage within acceptable operating range (3.2V–3.6V)

Substitute Parts Identified:

1. CLA2A-WKW-CYAZ0453 and CLA2A-WKW-CYBZ0343 – CreeLED active parts with cool white 5500K color temperature, 4-PLCC package, 3.2V forward voltage, and 120° viewing angle. These parts maintain the same physical footprint and cool white spectral characteristics.

2. CLA2A-WKW-CXBZ0153 – CreeLED active part with cool white 5500K color temperature, 4-PLCC package, 3.2V forward voltage, and 120° viewing angle.

3. CLA1A-MKW-CWBYA513 – CreeLED active part with warm white 3200K color temperature. This part shares the 4-PLCC package, 3.6V forward voltage, and surface mount configuration but differs in color temperature (warm vs. cool). Substitution is limited to applications where color temperature shift is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Cool White, Direct Replacement):

CLA2A-WKW-CYAZ0453, CLA2A-WKW-CYBZ0343, and CLA2A-WKW-CXBZ0153 are active CreeLED products that maintain cool white color temperature (5500K) within the acceptable range of the original ASMT-QWBE-NFHCE. All three parts are RoHS compliant and REACH unaffected, meeting modern regulatory requirements. These parts share identical 4-PLCC packaging, physical dimensions, and 120° viewing angle. The primary difference is forward voltage (3.2V vs. 3.6V), which requires circuit design adjustment but does not prevent substitution. Current test ratings differ (20mA vs. 150mA), reflecting different application classes.

Secondary Substitute (Warm White, Conditional):

CLA1A-MKW-CWBYA513 is an active CreeLED product with warm white color temperature (3200K). This part shares the 4-PLCC package, 3.6V forward voltage, and surface mount configuration. However, the color temperature shift from cool (5300K) to warm (3200K) represents a significant spectral change. This substitute is suitable only for applications where color temperature flexibility is acceptable or where warm white operation is functionally equivalent.

All substitute parts are active products with current manufacturing support, ensuring long-term availability compared to the obsolete ASMT-QWBE-NFHCE.

Frequently Asked Questions (FAQ)

Q: Can CLA2A-WKW-CYAZ0453, CLA2A-WKW-CYBZ0343, and CLA2A-WKW-CXBZ0153 be used interchangeably with ASMT-QWBE-NFHCE?

A: These three CreeLED parts are mechanically and electrically compatible substitutes. All use the 4-PLCC package with identical dimensions (3.20mm L x 2.80mm W, 2.10mm height) and maintain cool white color temperature (5500K) within the acceptable range. The primary design consideration is forward voltage: these substitutes operate at 3.2V compared to the original 3.6V, requiring circuit adjustment. Current test ratings differ (20mA vs. 150mA), reflecting different application classes.

Q: What is the difference between the three CLA2A-WKW cool white substitutes?

A: CLA2A-WKW-CYAZ0453, CLA2A-WKW-CYBZ0343, and CLA2A-WKW-CXBZ0153 differ in millicandela rating (4200mcd, 4575mcd, and 3920mcd respectively), indicating different luminous intensity levels. All three maintain 5500K color temperature, 3.2V forward voltage, 20mA test current, 120° viewing angle, and identical physical packaging. Selection depends on the required brightness level for the specific application.

Q: Why does CLA1A-MKW-CWBYA513 have a different color temperature?

A: CLA1A-MKW-CWBYA513 is a warm white LED (3200K) rather than cool white (5300K). This part is included as a substitute option only for applications where color temperature shift is functionally acceptable. The part maintains the 4-PLCC package and 3.6V forward voltage of the original, but the spectral output differs significantly. Use this substitute only if warm white operation meets application requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. CLA2A-WKW-CYAZ0453, CLA2A-WKW-CYBZ0343, CLA2A-WKW-CXBZ0153, and CLA1A-MKW-CWBYA513 are all RoHS compliant. The original ASMT-QWBE-NFHCE does not specify RoHS status. All substitute parts are REACH unaffected.

Q: What is the impact of different forward voltages on circuit design?

A: The substitute CLA2A parts operate at 3.2V compared to the original 3.6V. This 0.4V difference requires adjustment to current-limiting resistor values and power supply design to maintain proper LED operation. The CLA1A-MKW-CWBYA513 maintains 3.6V forward voltage, eliminating this design consideration.

Q: Can I use these substitutes in existing PCB designs without modification?

A: Mechanical compatibility is direct: all parts use the 4-PLCC package with identical footprint and height. Electrical compatibility requires circuit adjustment due to forward voltage differences in the CLA2A parts. The CLA1A-MKW-CWBYA513 requires no voltage adjustment but introduces color temperature change. PCB layout modifications are not necessary, but circuit design review is required.