ASMT-CB20 Equivalent & Substitute Parts

Part Overview

The ASMT-CB20 is a blue 470nm LED chip in 0603 (1608 Metric) surface mount package, designed for indication applications. This part operates at 2.85V forward voltage with a 25mcd brightness rating and 150° viewing angle. The ASMT-CB20 is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

ASMT-CB20

Broadcom LimitedIn Stock: 28284ASMT-CB20 Datasheet

Current PartRFQ

HSMR-C020

Broadcom LimitedIn Stock: 29582HSMR-C020 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The HSMR-C020 qualifies as a substitute for the ASMT-CB20 based on the following critical parameters:

• Package Compatibility: Both parts use 0603 (1608 Metric) surface mount package with identical physical dimensions (1.60mm L x 0.80mm W, 0.30mm max height)
• Color and Wavelength: Both are blue LEDs with dominant wavelengths in the blue spectrum (470nm vs 466nm)
• Forward Voltage: Both operate at 2.85V typical forward voltage, ensuring circuit compatibility
• Mounting Type: Both are surface mount components suitable for identical PCB assembly processes
• Compliance: Both are ROHS3 compliant and REACH unaffected

The HSMR-C020 is classified as Active product status, providing long-term availability compared to the Obsolete ASMT-CB20.

Parameter Comparison

Engineering Selection Recommendations

The HSMR-C020 is the manufacturer-recommended substitute for the obsolete ASMT-CB20. Both parts maintain identical forward voltage (2.85V) and package dimensions, ensuring direct PCB compatibility without layout modifications.

The HSMR-C020 offers Active product status, providing assured long-term availability and supply chain continuity. Both parts meet ROHS3 compliance and REACH requirements, maintaining regulatory alignment in end-use applications.

Note that the HSMR-C020 operates at lower test current (5mA vs 10mA) and produces lower brightness (11.2mcd vs 25mcd) with a slightly narrower viewing angle (140° vs 150°). Circuit designs must account for these brightness and current characteristics when transitioning from ASMT-CB20 to HSMR-C020.

Frequently Asked Questions (FAQ)

Q: Can HSMR-C020 be used as a direct replacement for ASMT-CB20 without PCB modifications?

A: Yes. Both parts share identical 0603 (1608 Metric) package dimensions and 2.85V forward voltage, enabling direct PCB substitution without layout changes.

Q: What are the key differences between these parts?

A: The primary differences are product status (Obsolete vs Active), brightness rating (25mcd vs 11.2mcd), test current (10mA vs 5mA), and viewing angle (150° vs 140°). The dominant wavelength differs slightly (470nm vs 466nm), though both are blue LEDs with identical peak wavelength (468nm).

Q: Why is the HSMR-C020 brightness lower than the ASMT-CB20?

A: The HSMR-C020 is specified at 5mA test current compared to the ASMT-CB20's 10mA test current. Brightness is current-dependent; the lower test current specification results in lower millicandela rating.

Q: Are there packaging differences between these parts?

A: Yes. The ASMT-CB20 is supplied in Cut Tape (CT) packaging, while the HSMR-C020 is supplied in Tape & Reel (TR) packaging. Both are suitable for automated assembly processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both ASMT-CB20 and HSMR-C020 are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance for equivalent applications.

Q: What is the viewing angle difference impact?

A: The HSMR-C020 has a 140° viewing angle compared to ASMT-CB20's 150°. This 10° difference is minimal for most indication applications but should be evaluated if wide-angle visibility is critical to the design.