Equivalent & Substitute Parts for HSMH-C191

Part Overview

The HSMH-C191 is a red diffused LED chip manufactured by Broadcom Limited, designed for indication applications in 0603 (1608 Metric) surface mount packages. This part operates at 1.8V forward voltage with a 17mcd brightness rating and 639nm dominant wavelength. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications requiring compatible red LED indicators with similar electrical and mechanical characteristics.

Substiute Parts

HSMH-C191

Broadcom LimitedIn Stock: 49327HSMH-C191 Datasheet

Current PartRFQ

HSMH-H191

Broadcom LimitedIn Stock: 39623HSMH-H191 Datasheet

MFR RecommendedRFQ

BR1111C-TR

Stanley Electric CoIn Stock: 19550BR1111C-TR Datasheet

MFR RecommendedRFQ

CMDA6AR7D1S

Visual Communications Company - VCCIn Stock: 4371CMDA6AR7D1S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HSMH-C191 is determined by the following critical parameters:

Electrical Compatibility: Forward voltage (Vf), current rating (20mA test), wavelength range (red spectrum 637nm–660nm), and brightness output (millicandela rating) must support the intended indication function.

Mechanical Compatibility: Package type (0603/1608 Metric), surface mount mounting, lens size (1.00mm x 0.80mm), and overall dimensions must fit existing PCB layouts and assembly processes.

Environmental Compliance: RoHS3 compliance and moisture sensitivity level ensure regulatory adherence and handling requirements match production standards.

Optical Characteristics: Diffused lens transparency and viewing angle (170° preferred) maintain consistent visual indication performance.

The three substitute parts listed below meet these criteria with acceptable variations in forward voltage (1.7V–2.1V range), brightness output (7.2mcd–90mcd), and specific wavelength characteristics, while maintaining 0603 package compatibility and surface mount assembly requirements.

Parameter Comparison

Engineering Selection Recommendations

HSMH-H191 (Broadcom Limited): This part is the manufacturer-recommended substitute with active product status. It maintains identical dominant wavelength (639nm), peak wavelength (660nm), viewing angle (170°), and moisture sensitivity level (2A, 4 Weeks) as the HSMH-C191. Forward voltage increases to 2.1V and brightness decreases to 7.2mcd. This part is suitable for applications where the original HSMH-C191 is unavailable and brightness reduction is acceptable. RoHS3 compliance status should be confirmed with the manufacturer.

BR1111C-TR (Stanley Electric Co): This part offers close electrical compatibility with 1.7V forward voltage and 11.7mcd brightness. It maintains 0603 package, surface mount assembly, and ROHS3 compliance. The viewing angle is reduced to 136°–141° compared to the original 170°, and height increases to 0.80mm. This part is suitable for applications where the reduced viewing angle and increased height are acceptable. Product status is obsolete.

CMDA6AR7D1S (Visual Communications Company - VCC): This part provides the highest brightness output at 90mcd with 1.9V forward voltage and unlimited moisture sensitivity (MSL 1). It maintains 0603 package, surface mount assembly, ROHS3 compliance, and 170° viewing angle. Peak wavelength is 637nm, within the red spectrum. Product status is not for new designs. This part is suitable for applications requiring higher brightness output and superior moisture resistance.

Frequently Asked Questions (FAQ)

Q: Can HSMH-H191 be used as a direct replacement for HSMH-C191?

A: HSMH-H191 is the manufacturer-recommended substitute. Both parts share identical wavelength characteristics (639nm dominant, 660nm peak), viewing angle (170°), and moisture sensitivity level (2A, 4 Weeks). Forward voltage increases from 1.8V to 2.1V and brightness decreases from 17mcd to 7.2mcd. Circuit design must accommodate the higher forward voltage and lower brightness output.

Q: What are the key differences between BR1111C-TR and HSMH-C191?

A: BR1111C-TR offers lower forward voltage (1.7V vs. 1.8V) and comparable brightness (11.7mcd vs. 17mcd). The viewing angle is narrower at 136°–141° compared to 170°. Package dimensions are identical (1.60mm L x 0.80mm W), but height increases to 0.80mm. Moisture sensitivity level is 4 (72 Hours) versus 2A (4 Weeks), requiring shorter storage and handling times.

Q: When should CMDA6AR7D1S be selected over other substitutes?

A: CMDA6AR7D1S is selected when higher brightness output (90mcd) is required and moisture sensitivity is a concern. Its unlimited moisture sensitivity (MSL 1) eliminates time-based storage restrictions. Forward voltage is 1.9V, close to the original 1.8V. Peak wavelength is 637nm, within acceptable red spectrum range. Product status is not for new designs, limiting use to existing production lines.

Q: Are all substitute parts compatible with existing PCB layouts designed for HSMH-C191?

A: HSMH-H191 and CMDA6AR7D1S maintain identical footprint dimensions (1.60mm L x 0.80mm W). BR1111C-TR also uses 1.60mm L x 0.80mm W dimensions but has increased height (0.80mm vs. 0.60mm), which may affect clearance in compact assemblies. All three parts use 0603 (1608 Metric) surface mount packages compatible with standard pick-and-place equipment.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected. HSMH-H191 and CMDA6AR7D1S maintain MSL 2A (4 Weeks) and MSL 1 (Unlimited) respectively, supporting standard moisture-controlled storage. BR1111C-TR requires MSL 4 (72 Hours) handling, necessitating expedited assembly processes.

Q: How do forward voltage differences affect circuit design?

A: Forward voltage ranges from 1.7V (BR1111C-TR) to 2.1V (HSMH-H191). Current-limiting resistor values must be recalculated for each substitute to maintain 20mA test current. Voltage drop across the LED increases with higher Vf values, reducing available voltage for series resistors in fixed-supply circuits.