MMST5401-TP Equivalent & Substitute Parts

Part Overview

The MMST5401-TP is an active production PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-323 package. This device operates at 150 V collector-emitter breakdown voltage with a maximum collector current of 200 mA and 200 mW power dissipation. The part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when electrical and mechanical parameters align within the specifications of this product category, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

MMST5401-TP

Micro Commercial CoIn Stock: 1010MMST5401-TP Datasheet

Current PartRFQ

MMST5401-7-F

Diodes IncorporatedIn Stock: 17946MMST5401-7-F Datasheet

DirectRFQ

MMBT5401WT1G

onsemiIn Stock: 21563MMBT5401WT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMST5401-TP are classified based on electrical parameter compatibility and mechanical interchangeability. The critical parameters determining substitution eligibility are:

Electrical Compatibility Criteria:

• Transistor polarity (PNP)
• Collector-emitter breakdown voltage (150 V minimum)
• Transition frequency (300 MHz)
• DC current gain (hFE ≥ 60 @ 10mA, 5V)
• Operating temperature range (-55°C to 150°C)
• Vce saturation characteristics (500mV @ 5mA, 50mA)

Mechanical Compatibility Criteria:

• Surface mount package (SOT-323 / SC-70)
• Pin configuration and footprint alignment

Direct Equivalents maintain identical maximum ratings for collector current (200 mA) and power dissipation (200 mW).

Similar Substitutes exceed the original specifications in collector current (500 mA) and power dissipation (400 mW) while maintaining all other electrical parameters, providing enhanced capability within the same package footprint.

Parameter Comparison

Engineering Selection Recommendations

MMST5401-7-F (Diodes Incorporated) is a direct electrical and mechanical equivalent to the MMST5401-TP. This part maintains identical maximum ratings for collector current and power dissipation while providing the same electrical performance across all specified parameters. Both parts are ROHS3 compliant, REACH unaffected, and carry unlimited moisture sensitivity rating. Selection of this substitute is appropriate for applications requiring identical performance specifications with alternative sourcing.

MMBT5401WT1G (onsemi) is a similar substitute with enhanced electrical ratings. This device increases maximum collector current to 500 mA and power dissipation to 400 mW while maintaining all other electrical parameters identical to the original part. The package footprint remains compatible (SC-70-3 / SOT-323). This substitute is suitable for applications where the original part's current and power ratings are limiting factors, provided circuit design accommodates the enhanced specifications. ROHS3 compliance and REACH unaffected status are maintained.

All substitute parts are active production devices with established inventory availability and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can MMST5401-7-F be used as a direct replacement for MMST5401-TP?

A: Yes. MMST5401-7-F is a direct equivalent with identical electrical specifications, including 200 mA maximum collector current, 150 V breakdown voltage, 200 mW power dissipation, and 300 MHz transition frequency. The SOT-323 package footprint is mechanically compatible. Both parts meet ROHS3 compliance and REACH requirements.

Q: What is the difference between MMST5401-7-F and MMBT5401WT1G?

A: MMBT5401WT1G provides enhanced ratings with 500 mA maximum collector current and 400 mW power dissipation compared to 200 mA and 200 mW for both MMST5401-TP and MMST5401-7-F. All other electrical parameters, including breakdown voltage, transition frequency, and DC current gain, remain identical. The SC-70-3 package is mechanically compatible with the original SOT-323 footprint.

Q: Are all substitute parts available in the same packaging format?

A: MMST5401-TP is supplied in Tape & Reel (TR) format. MMST5401-7-F is available in Cut Tape (CT) & Digi-Reel® format. MMBT5401WT1G is available in Cut Tape (CT) & Digi-Reel® format. All three parts use the same SOT-323 / SC-70 surface mount package with compatible pin configurations and footprints.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. MMST5401-TP, MMST5401-7-F, and MMBT5401WT1G are all ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. All parts are classified under ECCN EAR99 and HTSUS 8541.21.0075.

Q: Can MMBT5401WT1G be used in applications designed for MMST5401-TP?

A: Yes, with design consideration. MMBT5401WT1G exceeds the original specifications in collector current and power dissipation, making it suitable for applications where these enhanced ratings provide operational margin. The electrical performance at the original operating point remains identical due to matching DC current gain, breakdown voltage, and saturation characteristics. Circuit design must accommodate the higher maximum ratings.

Q: What is the operating temperature range for all substitute parts?

A: All three parts operate across -55°C to 150°C junction temperature range, providing identical thermal performance specifications.