HSMP-3866-TR1G Equivalent & Substitute Parts

Part Overview

The HSMP-3866-TR1G is an RF Diode PIN manufactured by Broadcom Limited, configured as a 2 Pair CA + CC device rated for 50V peak reverse voltage with 1 A maximum current capability. Packaged in SOT-25-5 (SC-74A, SOT-753), this component is classified as Obsolete. Due to its obsolete status and limited availability from the original manufacturer, identifying functionally compatible substitute parts is essential for ongoing design support and production continuity.

Substiute Parts

HSMP-3866-TR1G

Broadcom LimitedIn Stock: 22012HSMP-3866-TR1G Datasheet

Current PartRFQ

MA4P7455-1225T

MACOM Technology SolutionsIn Stock: 16665MA4P7455-1225T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HSMP-3866-TR1G is determined by the following critical parameters:

• Package Compatibility: Both the main part and substitute must use SOT-25-5 (SC-74A, SOT-753) packaging to ensure mechanical and electrical compatibility with existing PCB layouts.
• Voltage Rating: The substitute must support the application's peak reverse voltage requirements. The HSMP-3866-TR1G operates at 50V maximum; substitutes must meet or exceed this specification.
• Current Handling: The substitute must accommodate the maximum current demands of the circuit. The HSMP-3866-TR1G is rated for 1 A; substitutes must support equivalent or higher current capacity.
• Diode Configuration: PIN diode architecture and internal pair configuration (CA + CC) define the electrical behavior in RF switching and attenuation applications.
• Electrical Characteristics: Capacitance and resistance parameters at specified bias conditions determine RF performance and insertion loss characteristics.

The MA4P7455-1225T is grouped as a substitute based on identical package specification (SOT-25-5) and compatible RF PIN diode architecture, though with reduced current rating (75 mA vs. 1 A) and different internal configuration (PI Element vs. 2 Pair CA + CC).

Parameter Comparison

Engineering Selection Recommendations

The MA4P7455-1225T is available as an active product from MACOM Technology Solutions and carries ROHS3 compliance certification, providing regulatory advantage over the obsolete HSMP-3866-TR1G. Both components share identical SOT-25-5 packaging, enabling direct PCB footprint compatibility.

Selection of MA4P7455-1225T requires circuit-level evaluation due to differences in current rating (75 mA vs. 1 A), diode configuration (PI Element vs. 2 Pair CA + CC), and operating temperature range (-65°C ~ 125°C vs. 150°C maximum junction temperature). Applications requiring the full 1 A current capacity or maximum junction temperature of 150°C may require alternative solutions beyond the provided substitute list.

Frequently Asked Questions (FAQ)

Q: Can MA4P7455-1225T directly replace HSMP-3866-TR1G in all applications?

A: Direct replacement is limited to applications where circuit current demands do not exceed 75 mA and operating temperature remains within -65°C to 125°C. The reduced current rating and different diode configuration (PI Element vs. 2 Pair CA + CC) may affect RF performance characteristics. Circuit validation is necessary for specific applications.

Q: Are the packages mechanically identical?

A: Yes. Both HSMP-3866-TR1G and MA4P7455-1225T use SOT-25-5 (SC-74A, SOT-753) packaging, ensuring identical PCB footprint and land pattern compatibility.

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

A: HSMP-3866-TR1G uses a 2 Pair CA + CC configuration, while MA4P7455-1225T uses a PI Element configuration. These represent different internal architectures that affect capacitance, resistance, and RF switching characteristics. Electrical performance in specific RF applications may differ.

Q: Does MA4P7455-1225T meet environmental compliance requirements?

A: MA4P7455-1225T carries ROHS3 compliance certification. Both components have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling.

Q: What parameters should be evaluated when considering substitution?

A: Evaluate circuit current requirements against the 75 mA maximum rating, operating temperature range compatibility, and RF performance requirements based on capacitance and resistance specifications. Consult component datasheets for detailed electrical characteristics before final selection.