HSMS-281C-TR2G Equivalent & Substitute Parts

Part Overview

The HSMS-281C-TR2G is an RF Schottky diode manufactured by Broadcom Limited, configured as a 1 pair series connection with a 20V peak reverse voltage rating and 1A maximum current capability in SOT-323 packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design requirements and production continuity. Substitute parts must maintain functional compatibility through matching diode configuration, package type, and electrical performance within acceptable operating parameters.

Substiute Parts

HSMS-281C-TR2G

Broadcom LimitedIn Stock: 876HSMS-281C-TR2G Datasheet

Current PartRFQ

BAT54SWFILM

STMicroelectronicsIn Stock: 32223BAT54SWFILM Datasheet

MFR RecommendedRFQ

BAV199W,115

Nexperia USA Inc.In Stock: 115225BAV199W,115 Datasheet

MFR RecommendedRFQ

MA4E1339B1-1146T

MACOM Technology SolutionsIn Stock: 1822MA4E1339B1-1146T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HSMS-281C-TR2G is determined by the following mandatory criteria:

Package Compatibility: All substitute parts must use SC-70 or SOT-323 surface mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts.

Diode Configuration: Substitute parts must maintain 1 pair series connection configuration to preserve circuit functionality.

Voltage Rating: Substitute parts must have a peak reverse voltage (Vr) rating equal to or greater than 20V to ensure safe operation under the same electrical stress conditions.

Current Capability: Substitute parts must support current ratings sufficient for the application. The HSMS-281C-TR2G specifies 1A maximum current; substitutes with lower current ratings require application-level verification.

Thermal Performance: Operating temperature range must support the maximum junction temperature of 150°C or higher to maintain reliability in the intended thermal environment.

Moisture Sensitivity: MSL rating of 1 (Unlimited) is maintained across all qualified substitutes.

Three substitute parts meet these criteria with varying technology implementations and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

BAT54SWFILM (STMicroelectronics): This Schottky diode array is the primary substitute for RF applications requiring Schottky technology. It provides 40V reverse voltage rating and 300mA current capability, exceeding the HSMS-281C-TR2G specifications. The part is active in production with ROHS3 compliance and unlimited MSL rating. Operating temperature range of -40°C to 150°C supports extended thermal environments. This substitute is suitable for direct replacement in RF switching and detection circuits where the higher voltage and current ratings provide design margin.

BAV199W,115 (Nexperia USA Inc.): This general-purpose diode array uses standard (non-Schottky) technology with 75V reverse voltage and 110mA current rating. The part is active in production with ROHS3 compliance. While the voltage rating exceeds the original specification, the standard diode technology and lower current rating (110mA versus 1A) make this substitute appropriate only for applications where Schottky performance is not critical. The 3µs reverse recovery time is significantly longer than typical Schottky performance, affecting high-frequency switching characteristics.

MA4E1339B1-1146T (MACOM Technology Solutions): This RF Schottky diode array matches the original 20V voltage rating and maintains identical capacitance characteristics (1.2pF @ 0V, 1MHz). The 30mA current rating is substantially lower than the original 1A specification, restricting this substitute to low-power RF applications. The part is active in production with operating temperature range of -55°C to 125°C. This substitute is suitable for RF detection and switching applications operating within the 30mA current constraint.

All three substitutes maintain SOT-323 packaging compatibility and 1 pair series connection configuration. Selection depends on application current requirements and technology preference (Schottky versus standard diode).

Frequently Asked Questions (FAQ)

Q: Can BAT54SWFILM replace HSMS-281C-TR2G in all applications?

A: BAT54SWFILM is mechanically and electrically compatible as a direct substitute. Both are Schottky diodes in SOT-323 packaging with 1 pair series connection. The BAT54SWFILM provides higher voltage (40V) and current (300mA) ratings, offering design margin. Verify application-specific requirements for RF frequency response and switching characteristics before implementation.

Q: Why does BAV199W,115 have a lower current rating than the original part?

A: BAV199W,115 uses standard diode technology rather than Schottky technology. Standard diodes have different thermal and electrical characteristics that limit current handling in this package size. This part is suitable only for applications where current requirements do not exceed 110mA and Schottky performance is not required.

Q: Is MA4E1339B1-1146T suitable for high-current applications?

A: No. MA4E1339B1-1146T is rated for 30mA maximum current, significantly below the original HSMS-281C-TR2G 1A rating. This substitute is restricted to low-power RF applications such as detection circuits and low-level switching. Applications requiring currents above 30mA must use BAT54SWFILM or BAV199W,115.

Q: Are all substitutes RoHS compliant?

A: BAT54SWFILM and BAV199W,115 are explicitly ROHS3 compliant. MA4E1339B1-1146T RoHS status is not specified in the provided data. Verify RoHS compliance requirements with your procurement or quality assurance department before final part selection.

Q: What is the impact of operating temperature differences?

A: HSMS-281C-TR2G specifies 150°C maximum junction temperature. BAT54SWFILM supports -40°C to 150°C, providing extended low-temperature operation. MA4E1339B1-1146T maximum is 125°C, which is 25°C below the original specification. Applications operating near 150°C junction temperature should use BAT54SWFILM or BAV199W,115 to maintain thermal margin.

Q: Can these substitutes be used interchangeably on the same PCB?

A: All three substitutes use identical SC-70 SOT-323 packaging and pinout, allowing mechanical interchangeability on the PCB. However, electrical performance differences (current rating, voltage rating, diode technology) require application-level verification. Do not assume functional equivalence without circuit analysis.