MRF1550NT1 Equivalent & Substitute Parts

Part Overview

The MRF1550NT1 is an RF MOSFET LDMOS transistor manufactured by NXP USA Inc., designed for RF power amplification applications. This device operates at 12.5V with a 50W output power rating and 175MHz frequency capability. The part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

MRF1550NT1

NXP USA Inc.In Stock: 1927MRF1550NT1 Datasheet

Current PartRFQ

AFT05MP075NR1

NXP USA Inc.In Stock: 1506AFT05MP075NR1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MRF1550NT1 is based on the following critical parameters that define functional equivalence:

Common Electrical Characteristics:

• LDMOS technology platform
• 12.5V test voltage operation
• 40V rated voltage
• RF power amplification capability

Substitution Logic: The AFT05MP075NR1 qualifies as a substitute based on matching the core electrical operating voltage (12.5V test voltage and 40V rated voltage) and LDMOS technology. Both devices are manufactured by NXP USA Inc. and maintain ROHS3 compliance and identical MSL ratings. The substitute part demonstrates enhanced performance characteristics including higher frequency capability (520MHz versus 175MHz), increased power output (70W versus 50W), and improved gain (18.5dB versus 14.5dB). However, the substitute employs a different package type (TO-270AB surface mount versus TO-272AA chassis mount) and configuration (dual versus single), which requires mechanical and thermal design evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Compliance and Regulatory Status: Both the MRF1550NT1 and AFT05MP075NR1 maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The MRF1550NT1 carries an obsolete product status, while the AFT05MP075NR1 is classified as active, providing supply chain continuity and long-term availability.

Electrical Compatibility: The AFT05MP075NR1 operates within the same voltage envelope (12.5V test, 40V rated) as the MRF1550NT1, establishing baseline electrical compatibility. The substitute part delivers superior performance metrics across frequency, gain, and power output parameters.

Mechanical and Thermal Considerations: The transition from TO-272AA chassis mount to TO-270AB surface mount packaging requires PCB layout and thermal management redesign. The mounting type change from chassis mount to surface mount affects board integration strategy and heat dissipation architecture.

Frequently Asked Questions (FAQ)

Q: Can the AFT05MP075NR1 directly replace the MRF1550NT1 in existing designs?

A: Direct pin-for-pin replacement is not possible due to package type differences (TO-272AA versus TO-270AB) and mounting configuration changes (chassis mount versus surface mount). PCB layout and thermal design modifications are required.

Q: What are the primary electrical compatibility factors?

A: Both devices operate at 12.5V test voltage and 40V rated voltage, establishing core electrical compatibility. The LDMOS technology platform and NXP USA Inc. manufacturing ensure consistent device characteristics within this voltage class.

Q: How do the performance differences affect application suitability?

A: The AFT05MP075NR1 provides higher frequency operation (520MHz versus 175MHz), increased power output (70W versus 50W), and improved gain (18.5dB versus 14.5dB). These enhancements enable operation in higher-frequency RF applications and deliver greater power amplification capability.

Q: Are there packaging considerations for board integration?

A: Yes. The MRF1550NT1 uses TO-272AA chassis mount packaging suitable for through-hole or chassis-mounted applications. The AFT05MP075NR1 employs TO-270AB surface mount packaging, requiring surface mount assembly processes and different thermal coupling methods.

Q: Do both parts meet current regulatory requirements?

A: Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The AFT05MP075NR1 carries active product status, ensuring ongoing manufacturer support and supply availability.

Q: What is the significance of the MSL rating for both parts?

A: Both devices carry MSL 3 (168 Hours) ratings, indicating identical moisture sensitivity levels and storage requirements. This ensures consistent handling and storage protocols across both parts.