HSMS-281F-TR1G Equivalent & Substitute Parts

Part Overview

The HSMS-281F-TR1G is an RF Schottky diode manufactured by Broadcom Limited, configured as a 1 Pair Common Cathode device in SOT-323 packaging. This component is rated for 20V peak reverse voltage with a maximum current of 1A and features low capacitance (1.2pF @ 0V, 1MHz) and low resistance (15Ohm @ 5mA, 1MHz) characteristics suitable for RF applications.

The HSMS-281F-TR1G is classified as obsolete. Locating equivalent or substitute components is necessary to maintain design continuity and ensure component availability for new production runs or system updates.

Substiute Parts

HSMS-281F-TR1G

Broadcom LimitedIn Stock: 20484HSMS-281F-TR1G Datasheet

Current PartRFQ

1PS70SB85,115

Nexperia USA Inc.In Stock: 43331PS70SB85,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HSMS-281F-TR1G is determined by the following critical parameters:

• Diode Configuration: 1 Pair Common Cathode topology must be maintained
• Technology: Schottky diode type
• Package: SC-70, SOT-323 form factor for mechanical and thermal compatibility
• Voltage Rating: Peak reverse voltage capability must meet or exceed 20V
• Current Capability: Maximum current rating must support 1A operation
• Electrical Characteristics: Capacitance and resistance parameters must be compatible with RF circuit requirements

The 1PS70SB85,115 from Nexperia USA Inc. qualifies as a substitute based on matching diode configuration, Schottky technology, and identical SOT-323 packaging. However, the substitute operates at reduced voltage (15V) and current (30mA per diode) ratings compared to the original part.

Parameter Comparison

Engineering Selection Recommendations

The 1PS70SB85,115 is an active product from Nexperia USA Inc. with AEC-Q100 automotive qualification and ROHS3 compliance, providing supply chain continuity for the obsolete HSMS-281F-TR1G.

Substitution is mechanically and electrically feasible for applications where the reduced voltage (15V vs. 20V) and current (30mA vs. 1A) ratings remain within circuit operating margins. The substitute maintains identical SOT-323 packaging and 1 Pair Common Cathode configuration, ensuring pin compatibility and PCB layout compatibility.

The substitute operates at a lower maximum junction temperature (125°C vs. 150°C), which may impact thermal performance in high-temperature environments. The active product status of the 1PS70SB85,115 ensures long-term availability and supply reliability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the 1PS70SB85,115 directly replace the HSMS-281F-TR1G in all applications?

A: Direct replacement is possible only in applications where circuit operating conditions remain within the substitute's reduced voltage (15V maximum) and current (30mA per diode) ratings. Circuit analysis is required to confirm compatibility.

Q: Are the packages physically identical?

A: Yes. Both parts use SC-70, SOT-323 packaging, ensuring identical PCB footprint, pin spacing, and mounting compatibility.

Q: What is the key difference between these parts?

A: The primary differences are voltage rating (20V vs. 15V), current capability (1A vs. 30mA per diode), maximum junction temperature (150°C vs. 125°C), and product status (obsolete vs. active).

Q: Does the substitute have automotive qualification?

A: Yes. The 1PS70SB85,115 carries AEC-Q100 qualification and is ROHS3 compliant, meeting automotive industry standards.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.