HSMC-S660 Equivalent & Substitute Parts

Part Overview

The HSMC-S660 is a red diffused LED chip designed for surface mount, right-angle applications in indication circuits. Manufactured by Broadcom Limited under the SunPower series, this component features a 626nm dominant wavelength with 50mcd brightness rating and 1.9V typical forward voltage. The product is currently obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Substiute Parts

HSMC-S660

Broadcom LimitedIn Stock: 801HSMC-S660 Datasheet

Current PartRFQ

HSMC-C680

Broadcom LimitedIn Stock: 37847HSMC-C680 Datasheet

DirectRFQ

CMD11504UR

Visual Communications Company - VCCIn Stock: 8837CMD11504UR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HSMC-S660 is determined by the following critical parameters:

• Color: Red (all substitutes must be red)
• Mounting Type: Surface Mount, Right Angle (mechanical compatibility)
• Package / Case: 2-SMD, No Lead (PCB footprint compatibility)
• Lens Size: 2.00mm x 1.00mm (physical fit requirement)
• Voltage - Forward (Vf): Operating range tolerance (circuit design constraint)
• Current - Test: 20mA standard test condition
• Moisture Sensitivity Level (MSL): Storage and handling compatibility

The identified substitutes meet these core requirements while allowing variation in lens transparency (diffused vs. clear), millicandela rating, viewing angle, and wavelength characteristics within acceptable engineering tolerances for indication applications.

Parameter Comparison

Engineering Selection Recommendations

HSMC-C680 (Broadcom Limited) is the primary substitute for HSMC-S660. Both components share identical Broadcom manufacturing heritage, matching lens size, mounting configuration, and MSL rating. HSMC-C680 is active in production with ROHS3 compliance certification. The forward voltage differential (2V vs. 1.9V) is within typical circuit design tolerance for indication applications. The transition from diffused to clear lens transparency and increased millicandela rating (62.3mcd vs. 50mcd) represent performance improvements suitable for direct replacement. Reduced viewing angle (115° vs. 155°) and lower profile height (1.00mm vs. 1.50mm) may require PCB layout verification.

CMD11504UR (Visual Communications Company - VCC) serves as an alternative substitute when Broadcom sourcing is constrained. This component maintains mechanical compatibility and ROHS3 compliance but introduces design trade-offs: lower millicandela rating (13.2mcd vs. 50mcd), narrower viewing angle (100°), and higher MSL classification (3 vs. 2A). The forward voltage (1.7V) is closer to the original specification than HSMC-C680. The increased package width (2.00mm vs. 1.00mm) requires PCB footprint verification before implementation.

Frequently Asked Questions (FAQ)

Q: Can HSMC-C680 replace HSMC-S660 in existing designs without circuit modification?

A: HSMC-C680 is mechanically and electrically compatible for direct substitution in most indication applications. The 0.1V forward voltage increase (1.9V to 2V) falls within standard circuit design margins for LED indication circuits. However, verify that current-limiting resistor values accommodate the voltage change if precision is critical to your application.

Q: What is the primary difference between HSMC-S660 and HSMC-C680?

A: The main differences are lens transparency (diffused vs. clear), brightness (50mcd vs. 62.3mcd), viewing angle (155° vs. 115°), and physical height (1.50mm vs. 1.00mm). Both share identical lens size, mounting type, and package configuration. The clear lens of HSMC-C680 provides higher brightness with a narrower viewing angle.

Q: Is CMD11504UR suitable as a primary replacement?

A: CMD11504UR is suitable when Broadcom components are unavailable. It maintains the required mechanical and electrical compatibility but with reduced brightness (13.2mcd vs. 50mcd) and a narrower viewing angle (100°). The increased package width (2.00mm) requires PCB layout confirmation. This substitute is recommended only when HSMC-C680 sourcing is not feasible.

Q: What does MSL rating mean for these components?

A: Moisture Sensitivity Level (MSL) defines storage and handling requirements. HSMC-S660 and HSMC-C680 are rated MSL 2A (4 weeks), allowing 4 weeks of exposure to ambient conditions before reflow. CMD11504UR is rated MSL 3 (168 hours), requiring more stringent moisture control. Higher MSL numbers indicate greater sensitivity to moisture and require shorter shelf life or baking before assembly.

Q: Are all three components RoHS compliant?

A: HSMC-C680 and CMD11504UR are both ROHS3 compliant. RoHS compliance status for HSMC-S660 is not specified in the provided data. Both active substitutes meet current environmental and regulatory requirements for new designs.

Q: What is the impact of the viewing angle difference?

A: HSMC-S660 has a 155° viewing angle (wide), HSMC-C680 has 115°, and CMD11504UR has 100°. Narrower viewing angles concentrate light intensity in a specific direction, which may affect visibility in applications requiring wide-angle indication. Verify viewing angle requirements for your specific application before substitution.