MMRF1008GHR5 Equivalent & Substitute Parts

Part Overview

The MMRF1008GHR5 is an RF MOSFET LDMOS transistor manufactured by NXP USA Inc., designed for RF amplification applications in the 900MHz to 1.215GHz frequency band. This device operates at 50V with a maximum output power of 275W and provides 20.3dB gain. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

MMRF1008GHR5

NXP USA Inc.In Stock: 1181MMRF1008GHR5 Datasheet

Current PartRFQ

AFIC10275GNR1

NXP SemiconductorsIn Stock: 1061AFIC10275GNR1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMRF1008GHR5 is determined by alignment of the following critical parameters:

Frequency Compatibility: The substitute must operate within or overlap the 900MHz to 1.215GHz band. The AFIC10275GNR1 operates at 978MHz to 1.09GHz, which falls within the lower portion of the original frequency range.

Voltage Supply: Both the main part and substitute must support 50V supply voltage to ensure compatibility with existing power delivery systems.

Gain Performance: The original part provides 20.3dB gain. The substitute AFIC10275GNR1 provides 32.6dB gain, indicating higher amplification capability.

Package and Mounting: The original part uses NI-780GH-2L chassis mount packaging. The substitute uses TO-270-14 Gull Wing surface mount packaging, representing a different mechanical form factor.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring environmental and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The AFIC10275GNR1 is identified as the manufacturer-recommended substitute for the obsolete MMRF1008GHR5. Selection of this substitute is supported by the following engineering factors:

Product Status Alignment: The MMRF1008GHR5 is obsolete, while the AFIC10275GNR1 maintains active product status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements without modification to compliance documentation.

Voltage Compatibility: Both parts operate at 50V supply voltage, allowing direct integration into existing power delivery architectures without circuit redesign.

Frequency Band Coverage: The substitute frequency range of 978MHz to 1.09GHz overlaps with the lower portion of the original 900MHz to 1.215GHz band, supporting operation within the primary application frequency window.

Gain Differential: The substitute provides 32.6dB gain compared to the original 20.3dB, representing a 12.3dB increase in amplification. This performance enhancement may require circuit-level gain adjustment to maintain system specifications.

Mechanical Integration: The transition from chassis mount NI-780GH-2L to surface mount TO-270-14 Gull Wing packaging requires PCB layout modification and mechanical redesign of the mounting interface.

Frequently Asked Questions (FAQ)

Q: Can the AFIC10275GNR1 directly replace the MMRF1008GHR5 without circuit modification?

A: Direct pin-for-pin replacement is not possible due to different package types. The original uses NI-780GH-2L chassis mount packaging, while the substitute uses TO-270-14 surface mount packaging. PCB layout and mechanical mounting must be redesigned. Additionally, the higher gain of the substitute (32.6dB vs. 20.3dB) may require circuit-level gain compensation.

Q: What is the frequency overlap between these two parts?

A: The MMRF1008GHR5 operates at 900MHz to 1.215GHz. The AFIC10275GNR1 operates at 978MHz to 1.09GHz. The overlap range is 978MHz to 1.09GHz, representing the frequency band where both parts function.

Q: Are there compliance differences between the two parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute has a Moisture Sensitivity Level (MSL) rating of 3 (168 Hours), while the original is not applicable. This requires adherence to MSL3 handling and storage protocols during manufacturing and assembly.

Q: What is the impact of the gain difference on system design?

A: The substitute provides 12.3dB additional gain. This requires either attenuator insertion in the signal path or adjustment of downstream amplifier stages to maintain overall system gain specifications and prevent signal saturation.

Q: Is the substitute available in the same packaging format?

A: No. The original part is chassis mount; the substitute is surface mount in Tape & Reel format. This requires complete redesign of the mechanical mounting interface and PCB integration.

Q: Why is the original part classified as obsolete?

A: The MMRF1008GHR5 is listed as obsolete by the manufacturer. The AFIC10275GNR1 is the active substitute recommended by NXP for new designs and ongoing system support.