HSMS-285P-BLKG Equivalent & Substitute Parts

Part Overview

The HSMS-285P-BLKG is an RF Schottky diode manufactured by Broadcom Limited, configured as a 2-pair series connection with a 2V peak reverse voltage rating in a 6-TSSOP (SOT-363) package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain compatibility across electrical characteristics, thermal performance, and mechanical packaging to ensure reliable system operation.

Substiute Parts

HSMS-285P-BLKG

Broadcom LimitedIn Stock: 698HSMS-285P-BLKG Datasheet

Current PartRFQ

SBX201C-TB-E

onsemiIn Stock: 2125SBX201C-TB-E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HSMS-285P-BLKG is determined by the following critical parameters:

• Diode Configuration: The main part uses a 2-pair series connection. The identified substitute, SBX201C-TB-E, uses a 1-pair series connection, representing a structural difference in internal diode arrangement.
• Voltage Rating: Both parts maintain a 2V peak reverse voltage maximum, ensuring voltage compatibility.
• Capacitance Characteristics: The main part specifies 0.3pF @ 1V, 1MHz; the substitute provides 0.28pF @ 0V, 1MHz, representing comparable low-capacitance performance suitable for RF applications.
• Operating Temperature: Both parts support 150°C junction temperature operation.
• Package Compatibility: The main part uses SOT-363 (6-TSSOP); the substitute uses 3-CP (TO-236-3, SC-59, SOT-23-3), indicating different physical footprints and pin configurations.

The SBX201C-TB-E substitute differs in diode pair configuration and package form factor, requiring circuit-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

Selection of the SBX201C-TB-E as a substitute for the HSMS-285P-BLKG requires consideration of the following factors:

• Product Status: Both parts are classified as obsolete. Long-term availability cannot be assured for either component.
• Compliance: The SBX201C-TB-E carries ROHS3 compliance certification, whereas the main part does not specify RoHS status.
• Diode Configuration Difference: The transition from a 2-pair to 1-pair series connection alters the internal circuit topology. This change affects voltage distribution, current handling, and impedance characteristics within the diode array.
• Package Transition: Movement from SOT-363 (6-pin) to SOT-23-3 (3-pin) requires PCB layout redesign and may not be feasible for existing designs without significant rework.

Substitution is viable only when circuit requirements align with the 1-pair configuration and the smaller 3-pin package footprint is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the SBX201C-TB-E directly replace the HSMS-285P-BLKG without circuit modification?

A: No. The SBX201C-TB-E uses a 1-pair series connection versus the 2-pair configuration of the main part. This structural difference requires circuit-level evaluation. Additionally, the package transition from SOT-363 to SOT-23-3 necessitates PCB layout changes.

Q: What is the significance of the diode pair configuration difference?

A: The 2-pair series connection in the HSMS-285P-BLKG provides different voltage distribution and impedance characteristics compared to the 1-pair configuration in the SBX201C-TB-E. Applications requiring specific voltage handling or impedance matching must verify compatibility before substitution.

Q: Are both parts still in production?

A: No. Both the HSMS-285P-BLKG and SBX201C-TB-E are classified as obsolete. Inventory availability is limited, and long-term sourcing cannot be guaranteed.

Q: How do the capacitance specifications compare?

A: The main part specifies 0.3pF @ 1V, 1MHz, while the substitute provides 0.28pF @ 0V, 1MHz. Both values are comparable for RF applications, though the measurement conditions differ slightly.

Q: What are the package footprint implications?

A: The HSMS-285P-BLKG uses a 6-pin SOT-363 package, while the SBX201C-TB-E uses a 3-pin SOT-23-3 package. Existing PCB designs cannot accommodate this substitute without layout redesign and component repositioning.

Q: Does the SBX201C-TB-E offer any compliance advantages?

A: Yes. The SBX201C-TB-E is ROHS3 compliant, whereas the main part does not specify RoHS status. This may be relevant for applications subject to RoHS regulatory requirements.