HSMB-C172 Equivalent & Substitute Parts

Part Overview

The HSMB-C172 is a blue diffused LED chip in 0805 (2012 Metric) surface mount package manufactured by Broadcom Limited. This component is classified as obsolete, indicating discontinued production and limited availability. The part operates at 4V forward voltage with a 462nm dominant wavelength and 3mcd brightness rating, designed for LED indication applications in discrete circuit implementations.

Due to obsolete status, sourcing replacement units from original inventory becomes increasingly difficult. Identifying functionally compatible substitute parts ensures design continuity and supply chain reliability for applications currently using this component.

Substiute Parts

HSMB-C172

Broadcom LimitedIn Stock: 8012HSMB-C172 Datasheet

Current PartRFQ

HSMR-C170

Broadcom LimitedIn Stock: 6985HSMR-C170 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HSMB-C172 is determined by the following critical parameters:

• Package compatibility: 0805 (2012 Metric) surface mount form factor
• Color specification: Blue LED
• Lens type: Diffused
• Physical dimensions: 2.00mm L x 1.25mm W, 0.80mm maximum height
• Electrical operating range: Forward voltage and test current within acceptable circuit design tolerances
• Wavelength range: Blue spectrum (460nm–475nm dominant wavelength acceptable)
• Viewing angle: Minimum 155° for general indication applications
• Moisture sensitivity: MSL 2A classification

The HSMR-C170 meets all substitution criteria as a Broadcom Limited blue diffused LED in identical 0805 package with matching physical dimensions and moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

The HSMR-C170 is the recommended substitute for the obsolete HSMB-C172 based on the following factors:

• Active product status ensures ongoing availability and supply chain continuity
• Identical package, mounting type, and physical dimensions enable direct PCB layout compatibility
• Matching moisture sensitivity classification (MSL 2A) maintains equivalent handling and storage requirements
• REACH Unaffected and EAR99 ECCN classifications provide regulatory alignment
• RoHS3 compliance of the HSMR-C170 supports modern environmental standards

Circuit design considerations: The HSMR-C170 operates at 3.4V forward voltage compared to the HSMB-C172's 4V specification. Applications must accommodate this 0.6V reduction in typical forward voltage. The substitute part's 55mcd brightness rating significantly exceeds the original 3mcd specification, providing enhanced luminous intensity for indication purposes. Test current differs at 20mA versus 10mA; circuit current-limiting resistor values require recalculation based on actual supply voltage and desired LED current.

Frequently Asked Questions (FAQ)

Q: Can the HSMR-C170 be used as a direct drop-in replacement for the HSMB-C172?

A: Physical and electrical compatibility exists for PCB placement. However, circuit design modifications are necessary due to differing forward voltage (3.4V vs. 4V) and test current (20mA vs. 10mA) specifications. Current-limiting resistor values must be recalculated for the target application.

Q: What are the key differences between these two parts?

A: Primary differences include product status (obsolete vs. active), forward voltage (4V vs. 3.4V), brightness (3mcd vs. 55mcd), dominant wavelength (462nm vs. 473nm), and test current (10mA vs. 20mA). Physical package dimensions and moisture sensitivity remain identical.

Q: Are there any compliance or regulatory concerns with substitution?

A: Both parts share identical REACH and ECCN classifications. The HSMR-C170 adds RoHS3 compliance, which supports modern regulatory requirements. No compliance barriers exist for substitution.

Q: How does the brightness difference affect application suitability?

A: The HSMR-C170's 55mcd rating provides substantially higher luminous intensity than the original 3mcd specification. Applications requiring specific brightness levels must account for this 18-fold increase in millicandela rating through appropriate circuit design or optical considerations.

Q: What packaging options are available for the HSMR-C170?

A: The HSMR-C170 is available in Cut Tape (CT) and Digi-Reel packaging formats, supporting both small-quantity and production-volume procurement requirements.