MRF1004MB Equivalent & Substitute Parts

Part Overview

The MRF1004MB is an NPN RF transistor manufactured by MACOM Technology Solutions, designed for operation in the 960MHz to 1215MHz frequency band with a maximum power rating of 4W. This active product is housed in a 332A-03 chassis mount package and is ROHS3 compliant. The device delivers 11dB gain at 20V collector-emitter voltage with a maximum collector current of 250mA, making it suitable for RF power amplification applications in the UHF band.

Substitute parts are necessary when the original MRF1004MB becomes unavailable, when alternative mounting technologies are required (such as surface mount instead of chassis mount), or when design modifications necessitate different electrical characteristics within acceptable operating parameters.

Substiute Parts

MRF1004MB

MACOM Technology SolutionsIn Stock: 3900MRF1004MB Datasheet

Current PartRFQ

BFP650H6327XTSA1

Infineon TechnologiesIn Stock: 7298BFP650H6327XTSA1 Datasheet

MFR RecommendedRFQ

BFP840ESDH6327XTSA1

Infineon TechnologiesIn Stock: 1737BFP840ESDH6327XTSA1 Datasheet

MFR RecommendedRFQ

BFR35APE6327HTSA1

Infineon TechnologiesIn Stock: 3724BFR35APE6327HTSA1 Datasheet

MFR RecommendedRFQ

MMBTH10LT1G

onsemiIn Stock: 62479MMBTH10LT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MRF1004MB is determined by the following critical parameters:

Transistor Type: All substitutes must be NPN configuration to maintain circuit polarity and biasing requirements.

Voltage Rating: The MRF1004MB operates at 20V maximum collector-emitter breakdown voltage. Substitute parts must support this voltage level or higher to ensure safe operation within the original circuit design.

Power Dissipation: The 4W power rating is a primary design constraint. Substitute parts must dissipate equivalent or greater power to prevent thermal failure in the application.

Current Handling: Maximum collector current of 250mA establishes the current capacity requirement. Substitutes must support this current level.

Frequency Band: Operation in the 960MHz to 1215MHz UHF band is application-specific. Substitutes with transition frequencies covering or exceeding this range are acceptable.

Gain Characteristics: The 11dB gain specification indicates the amplification requirement. Substitutes with comparable or higher gain values maintain circuit performance.

Mounting and Packaging: The original chassis mount 332A-03 package may be replaced with surface mount alternatives (SOT-23-3, SOT-343) when circuit board design permits, provided all electrical parameters remain compatible.

Compliance: All substitutes must maintain ROHS3 compliance and MSL 1 rating to ensure environmental and handling compatibility.

Parameter Comparison

Engineering Selection Recommendations

BFR35APE6327HTSA1 (Infineon Technologies): This substitute operates at 15V maximum collector-emitter voltage, which is lower than the MRF1004MB's 20V rating. Power dissipation is 280mW, significantly reduced from the original 4W specification. Maximum collector current is 45mA compared to 250mA. This part is suitable only for applications where the circuit operates at reduced voltage and current levels. The surface mount SOT-23-3 package requires PCB redesign. ROHS3 compliance and MSL 1 rating are maintained.

BFP650H6327XTSA1 (Infineon Technologies): This substitute has a 4.5V maximum collector-emitter voltage, substantially lower than the MRF1004MB. Power rating is 500mW, a significant reduction from 4W. Maximum collector current is 150mA, below the original 250mA. This part operates at higher frequencies (37GHz transition frequency) but is not suitable for direct substitution in 20V circuits. Surface mount SOT-343 package requires board redesign. ROHS3 compliance and MSL 1 rating are maintained.

MMBTH10LT1G (onsemi): This substitute operates at 25V maximum collector-emitter voltage, exceeding the MRF1004MB's 20V rating and providing voltage margin. Power dissipation is 225mW, reduced from 4W. Frequency transition is 650MHz, within the UHF band. DC current gain is 60 at 4mA, 10V. This part is applicable for lower-power UHF applications. Surface mount SOT-23-3 package requires PCB redesign. ROHS3 compliance and MSL 1 rating are maintained.

BFP840ESDH6327XTSA1 (Infineon Technologies): This substitute has a 2.25V maximum collector-emitter voltage, far below the MRF1004MB's 20V rating. Power rating is 75mW, a substantial reduction from 4W. Maximum collector current is 35mA, significantly lower than 250mA. This part operates at very high frequencies (80GHz transition frequency) but is not suitable for direct substitution in standard 20V RF circuits. Surface mount SOT-343 package requires board redesign. ROHS3 compliance and MSL 1 rating are maintained.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring environmental and handling compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the BFR35APE6327HTSA1 directly replace the MRF1004MB in an existing circuit?

A: Direct replacement is not recommended. The BFR35APE6327HTSA1 operates at 15V maximum collector-emitter voltage versus the MRF1004MB's 20V, and power dissipation is 280mW compared to 4W. Circuit redesign is necessary to accommodate reduced voltage and power ratings. Additionally, the surface mount SOT-23-3 package differs from the chassis mount 332A-03 package, requiring PCB layout modification.

Q: What is the primary limitation of the BFP650H6327XTSA1 as a substitute?

A: The BFP650H6327XTSA1 has a maximum collector-emitter voltage of only 4.5V, which is significantly lower than the MRF1004MB's 20V rating. Power dissipation is 500mW versus 4W. This part is not suitable for circuits designed for 20V operation and requires substantial circuit redesign. The surface mount SOT-343 package also necessitates board layout changes.

Q: Is the MMBTH10LT1G suitable for UHF band applications?

A: The MMBTH10LT1G operates at 650MHz transition frequency, which falls within the UHF band. However, power dissipation is 225mW compared to the MRF1004MB's 4W, limiting its use to lower-power applications. The 25V maximum collector-emitter voltage exceeds the original 20V specification, providing voltage margin. Surface mount SOT-23-3 packaging requires PCB redesign.

Q: Why is the BFP840ESDH6327XTSA1 not recommended as a direct substitute?

A: The BFP840ESDH6327XTSA1 operates at 2.25V maximum collector-emitter voltage, far below the MRF1004MB's 20V rating. Power dissipation is 75mW versus 4W, and maximum collector current is 35mA compared to 250mA. This part is designed for high-frequency, low-power applications and is not compatible with circuits requiring 20V operation and 4W power handling.

Q: What packaging considerations apply when selecting a substitute?

A: The MRF1004MB uses a chassis mount 332A-03 package. All listed substitutes use surface mount packages (SOT-23-3 or SOT-343), requiring PCB redesign and different mounting techniques. Surface mount packages offer improved thermal characteristics and reduced board space but necessitate compatible PCB layout and assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts (BFR35APE6327HTSA1, BFP650H6327XTSA1, MMBTH10LT1G, and BFP840ESDH6327XTSA1) are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with environmental and handling requirements.

Q: What electrical parameters must a substitute maintain for circuit compatibility?

A: Critical parameters include transistor type (NPN), maximum collector-emitter voltage (must equal or exceed 20V), power dissipation capability (must support 4W or circuit redesign is required), and maximum collector current (must support 250mA or circuit redesign is required). Gain and frequency characteristics must also align with application requirements.