QSMF-C151 Equivalent & Substitute Parts

Part Overview

The QSMF-C151 is a bicolor LED chip manufactured by Broadcom Limited, providing green and yellow LED indication in a discrete package configuration. This component is classified as an LED Indication - Discrete device and is currently designated as Obsolete product status. Due to its obsolete classification, identifying functionally equivalent substitute components is essential for ongoing design support, production continuity, and system maintenance applications.

Substiute Parts

QSMF-C151

Broadcom LimitedIn Stock: 880QSMF-C151 Datasheet

Current PartRFQ

HSMF-C156

Broadcom LimitedIn Stock: 28851HSMF-C156 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The HSMF-C156 is identified as a direct substitute for the QSMF-C151 based on the following substitution criteria:

Functional Equivalence Parameters:

• Bicolor LED configuration with green and yellow color output
• Discrete LED indication application classification
• Broadcom Limited manufacturer continuity
• Identical ECCN (EAR99) and HTSUS (8541.41.0000) trade classifications
• Active product status with robust inventory availability

Electrical Compatibility Parameters:

• Green wavelength: 572nm dominant (570nm peak)
• Yellow wavelength: 586nm dominant (589nm peak)
• Forward voltage specifications: 2.2V Green, 2.1V Yellow
• Test current: 20mA Green, 20mA Yellow
• Viewing angle: 170°

Mechanical Compatibility Parameters:

• Surface mount technology alignment
• Package designation: 1210 (3225 Metric)
• Lens configuration: Rectangle with flat top
• Lens transparency: Diffused
• Lens size: 2.06mm x 2.70mm
• Physical dimensions: 3.20mm L x 2.70mm W, 1.10mm maximum height

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: HSMF-C156

The HSMF-C156 is the designated substitute for the obsolete QSMF-C151. Selection of this component is supported by the following engineering factors:

Product Status Alignment: The HSMF-C156 maintains Active product status, ensuring long-term availability, ongoing manufacturer support, and continued compliance with current regulatory standards. This contrasts with the QSMF-C151's Obsolete classification, which restricts future procurement and support options.

Regulatory and Compliance Continuity: Both components share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, ensuring no change to export control or tariff treatment. The HSMF-C156 additionally provides ROHS3 Compliance and REACH Unaffected status, meeting contemporary environmental and safety regulations.

Functional Equivalence: The bicolor green and yellow LED configuration is preserved in the HSMF-C156, maintaining the discrete LED indication function required by the original design. Electrical parameters including forward voltage, test current, and wavelength specifications are fully documented for the substitute component.

Supply Chain Continuity: The HSMF-C156 demonstrates significantly higher inventory availability (28,777 pieces) compared to the limited stock of the original component (840 pieces), providing enhanced procurement reliability and reduced lead time risk.

Frequently Asked Questions (FAQ)

Q: Can the HSMF-C156 directly replace the QSMF-C151 in existing designs?

A: The HSMF-C156 is engineered as a direct substitute for the QSMF-C151. Both components are manufactured by Broadcom Limited and provide bicolor green and yellow LED indication in discrete configurations. The HSMF-C156 is specified for surface mount assembly in a 1210 (3225 Metric) package with documented electrical and optical parameters.

Q: What are the key electrical differences between these components?

A: The HSMF-C156 provides fully specified electrical parameters: 2.2V forward voltage for green operation, 2.1V for yellow operation, with 20mA test current for each color. The original QSMF-C151 specifications are not detailed in available documentation. The wavelength specifications for the HSMF-C156 are 572nm dominant (570nm peak) for green and 586nm dominant (589nm peak) for yellow.

Q: Are there packaging or mechanical compatibility concerns?

A: The HSMF-C156 is specified as a surface mount component in 1210 (3225 Metric) package format with a maximum height of 1.10mm. The component features a diffused lens with rectangle flat-top geometry and dimensions of 3.20mm length by 2.70mm width. These specifications must be verified against the original design's mechanical constraints and PCB layout requirements.

Q: What is the viewing angle specification for the substitute component?

A: The HSMF-C156 provides a 170° viewing angle, supporting wide-angle LED indication applications. This parameter should be evaluated against the original design's optical requirements.

Q: Are there moisture sensitivity or storage considerations?

A: The HSMF-C156 is classified as Moisture Sensitivity Level 2A, requiring storage conditions of 4 weeks at specified humidity levels. This classification must be observed during component handling, storage, and assembly processes to maintain component reliability.

Q: How do the brightness specifications compare?

A: The HSMF-C156 provides millicandela ratings of 15mcd for green and 8mcd for yellow operation. These brightness specifications should be evaluated against the original design's luminous intensity requirements.

Q: What regulatory certifications apply to the substitute component?

A: The HSMF-C156 is ROHS3 Compliant and REACH Unaffected, meeting current environmental and hazardous substance regulations. Both the original and substitute components share identical ECCN (EAR99) and HTSUS (8541.41.0000) trade classifications.