MMST3904-TP-HF Equivalent & Substitute Parts

Part Overview

The MMST3904-TP-HF is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for interface applications in surface mount configurations. This transistor operates at a maximum collector current of 200 mA, collector-emitter breakdown voltage of 40 V, and transition frequency of 300 MHz, with a maximum power dissipation of 200 mW. The device is packaged in SOT-323 (SC-70) surface mount form factor and is classified as an active product. Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as automotive qualification or alternative packaging formats.

Substiute Parts

MMST3904-TP-HF

Micro Commercial CoIn Stock: 689MMST3904-TP-HF Datasheet

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MMST3904-7-F

Diodes IncorporatedIn Stock: 65337MMST3904-7-F Datasheet

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PMST3904,115

Nexperia USA Inc.In Stock: 11694PMST3904,115 Datasheet

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PMST3904,135

Nexperia USA Inc.In Stock: 9594PMST3904,135 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMST3904-TP-HF is determined by electrical and mechanical parameter equivalence. All substitute parts must satisfy the following criteria:

Electrical Parameters (Critical for Substitution):

• Transistor Type: NPN
• Maximum Collector Current (Ic): 200 mA
• Collector-Emitter Breakdown Voltage: 40 V
• Vce Saturation: 300 mV @ 5 mA, 50 mA
• DC Current Gain (hFE): Minimum 100 @ 10 mA, 1 V
• Maximum Power Dissipation: 200 mW
• Transition Frequency: 300 MHz
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Critical for Substitution):

• Mounting Type: Surface Mount
• Package / Case: SC-70, SOT-323

The identified substitute parts (MMST3904-7-F, PMST3904,115, and PMST3904,135) meet all electrical and mechanical requirements. Differences in packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and compliance certifications (RoHS3, AEC-Q101 automotive qualification) do not affect functional substitution but may influence procurement and application suitability.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are active products with full electrical and mechanical compatibility to the MMST3904-TP-HF. Selection among these alternatives is based on specific application and supply chain requirements:

MMST3904-7-F (Diodes Incorporated): This substitute provides direct electrical equivalence with identical electrical parameters and SOT-323 packaging. It is ROHS3 compliant and available in Cut Tape and Digi-Reel packaging formats. This option is suitable for general industrial applications requiring high inventory availability (65,300 units in stock).

PMST3904,115 and PMST3904,135 (Nexperia USA Inc.): Both parts are electrically equivalent and carry AEC-Q101 automotive qualification, indicating suitability for automotive-grade applications. These parts are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). The distinction between ,115 and ,135 variants relates to packaging tape specifications and does not affect electrical performance. These options are appropriate for automotive and mission-critical applications requiring automotive-grade components.

Selection should prioritize component availability, supply chain logistics, and application-specific compliance requirements (automotive qualification where applicable).

Frequently Asked Questions (FAQ)

Q: Can MMST3904-7-F be used as a direct replacement for MMST3904-TP-HF?

A: Yes. MMST3904-7-F meets all electrical specifications (200 mA collector current, 40 V breakdown voltage, 300 MHz transition frequency, 200 mW power dissipation) and is packaged in the identical SOT-323 surface mount form factor. The primary difference is packaging format (Cut Tape & Digi-Reel versus the original format) and RoHS3 compliance certification.

Q: What is the difference between PMST3904,115 and PMST3904,135?

A: Both parts are electrically identical and carry AEC-Q101 automotive qualification. The numerical suffixes (,115 and ,135) designate different tape specifications for reel packaging. Electrical performance and PCB compatibility are identical between the two variants.

Q: Are the Nexperia PMST3904 variants suitable for non-automotive applications?

A: Yes. PMST3904,115 and PMST3904,135 meet all electrical requirements for the MMST3904-TP-HF and are suitable for any application within the specified electrical and thermal operating ranges. Automotive qualification (AEC-Q101) indicates enhanced reliability and quality assurance but does not restrict use to automotive applications.

Q: Does the absence of specified collector cutoff current (Icbo) in MMST3904-7-F affect substitution?

A: No. The MMST3904-7-F datasheet does not specify collector cutoff current, but this parameter is not required for functional equivalence. All other critical electrical parameters are identical, ensuring direct substitution capability.

Q: What packaging options are available for these substitute parts?

A: MMST3904-7-F is available in Cut Tape (CT) and Digi-Reel packaging. PMST3904,115 and PMST3904,135 are supplied in Tape & Reel (TR) format. All three substitute parts use the SOT-323 surface mount package, ensuring identical PCB footprint and soldering requirements.

Q: Are all substitute parts ROHS3 compliant?

A: MMST3904-7-F, PMST3904,115, and PMST3904,135 are all ROHS3 compliant. The original MMST3904-TP-HF does not specify RoHS status in the provided data. Substitutes provide enhanced environmental compliance certification.

Q: What is the operating temperature range for each part?

A: MMST3904-TP-HF and MMST3904-7-F operate from -55°C to 150°C (TJ). PMST3904,115 and PMST3904,135 specify a maximum junction temperature of 150°C (TJ). All parts support the full industrial temperature range required for interface applications.