HSMB-C170 Equivalent & Substitute Parts

Part Overview

The HSMB-C170 is a blue diffused LED chip in 0805 (2012 Metric) surface mount package, designed for indication applications with a dominant wavelength of 466nm and forward voltage of 3.8V at 20mA test current. This part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

HSMB-C170

Broadcom LimitedIn Stock: 1040HSMB-C170 Datasheet

Current PartRFQ

HSMR-C170

Broadcom LimitedIn Stock: 6985HSMR-C170 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The HSMR-C170 qualifies as a direct substitute based on the following alignment criteria:

Matching Parameters:

• Identical package and case: 0805 (2012 Metric)
• Identical mounting type: Surface Mount
• Identical color: Blue
• Identical lens transparency: Diffused
• Identical test current: 20mA
• Identical supplier device package: Chip LED
• Identical physical dimensions: 2.00mm L x 1.25mm W
• Identical moisture sensitivity level: 2A (4 Weeks)
• Identical compliance status: REACH Unaffected, EAR99 classification

Allowable Parameter Variations: The HSMR-C170 exhibits acceptable deviations in forward voltage (3.4V vs. 3.8V), dominant wavelength (473nm vs. 466nm), viewing angle (155° vs. 170°), and millicandela rating (55mcd vs. 6mcd). These variations remain within the functional tolerance for blue LED indication applications and do not compromise mechanical or electrical compatibility in standard circuit implementations.

Parameter Comparison

Engineering Selection Recommendations

The HSMR-C170 is the designated manufacturer substitute for the obsolete HSMB-C170. Selection of the HSMR-C170 is supported by:

• Active product status with current manufacturing availability
• Identical mechanical compatibility: same package, mounting type, and physical footprint
• ROHS3 compliance certification on the substitute part
• Maintained MSL rating and compliance classifications (REACH Unaffected, EAR99)
• Lower forward voltage (3.4V) reduces power dissipation in series resistor networks
• Higher luminous intensity (55mcd vs. 6mcd) provides improved visibility margin for indication applications

Frequently Asked Questions (FAQ)

Q: Can the HSMR-C170 be used as a direct replacement for the HSMB-C170 in existing PCB designs?

A: Yes. Both parts share identical package specifications (0805), mounting type (surface mount), and physical dimensions (2.00mm L x 1.25mm W). No PCB layout modifications are required.

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

A: The HSMR-C170 operates at a lower forward voltage (3.4V vs. 3.8V) and exhibits a shorter dominant wavelength (473nm vs. 466nm). The substitute part also provides significantly higher luminous intensity (55mcd vs. 6mcd). These differences remain within acceptable tolerances for standard indication circuits.

Q: Does the height difference (0.80mm vs. 1.00mm) affect compatibility?

A: No. The HSMR-C170's reduced maximum height (0.80mm) is mechanically compatible with designs specified for the HSMB-C170 (1.00mm). This represents an improvement in form factor consistency.

Q: Are there any compliance or certification differences?

A: The HSMR-C170 carries ROHS3 compliance certification, whereas the obsolete HSMB-C170 does not list this certification. Both parts maintain identical REACH and ECCN classifications.

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

A: The HSMR-C170 is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements.