PMST5550,135 Equivalent & Substitute Parts

Part Overview

The PMST5550,135 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This surface mount device operates at 140 V collector-emitter breakdown voltage with a maximum collector current of 300 mA and transition frequency of 300 MHz. The part is actively produced, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

PMST5550,135

Nexperia USA Inc.In Stock: 1186PMST5550,135 Datasheet

Current PartRFQ

PMST5550,115

Nexperia USA Inc.In Stock: 33368PMST5550,115 Datasheet

Parametric EquivalentRFQ

MMST5551-7-F

Diodes IncorporatedIn Stock: 19218MMST5551-7-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PMST5550,135 are classified based on electrical parameter compatibility and mechanical interchangeability. The substitution logic is determined by the following criteria:

Parametric Equivalents maintain identical or superior electrical specifications across all critical parameters: collector-emitter breakdown voltage, maximum collector current, power dissipation, transition frequency, saturation voltage, and DC current gain. These parts are direct functional replacements with no circuit redesign required.

Similar Substitutes share the same package type (SOT-323) and mounting configuration but may have variations in one or more electrical parameters. These parts are suitable for applications where the specific parameter variation does not impact circuit performance.

Critical Parameters for Substitution:

• Transistor Type (NPN)
• Package / Case (SC-70, SOT-323)
• Mounting Type (Surface Mount)
• Voltage - Collector Emitter Breakdown (140 V minimum)
• Current - Collector (Ic) (300 mA minimum)
• Power - Max (200 mW minimum)
• Frequency - Transition (300 MHz minimum)

Parameter Comparison

Engineering Selection Recommendations

PMST5550,115 is a parametric equivalent to the PMST5550,135. Both parts are manufactured by Nexperia USA Inc., share identical electrical specifications, and carry AEC-Q101 automotive qualification. This part is suitable for direct substitution in all applications where the PMST5550,135 is specified. The PMST5550,115 is actively produced with higher inventory availability (33,262 units in stock versus 1,090 units for the primary part number).

MMST5551-7-F is a similar substitute manufactured by Diodes Incorporated. This part shares the same SOT-323 package, mounting type, power rating, and transition frequency. The MMST5551-7-F features a higher collector-emitter breakdown voltage (160 V versus 140 V), lower maximum collector current (200 mA versus 300 mA), improved saturation voltage characteristics (200 mV versus 250 mV), and higher DC current gain (80 versus 60). The extended operating temperature range (-55°C to 150°C) provides additional thermal margin. This part is suitable for applications where the reduced collector current rating does not constrain circuit operation and where the enhanced voltage and temperature specifications provide design benefits. The MMST5551-7-F is actively produced with substantial inventory availability (19,191 units in stock).

Both substitute parts maintain RoHS3 compliance, unlimited moisture sensitivity level (MSL 1), and are actively produced with confirmed availability.

Frequently Asked Questions (FAQ)

Q: Can PMST5550,115 be used as a direct replacement for PMST5550,135?

A: Yes. The PMST5550,115 is a parametric equivalent with identical electrical specifications, package type, and automotive qualification. No circuit modifications are required.

Q: What are the key differences between PMST5550,135 and MMST5551-7-F?

A: The MMST5551-7-F has a higher collector-emitter breakdown voltage (160 V versus 140 V), lower maximum collector current (200 mA versus 300 mA), lower saturation voltage (200 mV versus 250 mV), higher DC current gain (80 versus 60), and an extended operating temperature range (-55°C to 150°C versus 150°C). Both share the same SOT-323 package and 300 MHz transition frequency.

Q: Is MMST5551-7-F suitable for all applications using PMST5550,135?

A: The MMST5551-7-F is suitable for applications where the maximum collector current requirement does not exceed 200 mA. If the circuit requires collector currents above 200 mA, the MMST5551-7-F cannot be used. For applications operating within 200 mA, the enhanced voltage rating and improved saturation characteristics provide additional design margin.

Q: Are all substitute parts automotive qualified?

A: PMST5550,115 carries AEC-Q101 automotive qualification identical to the primary part. MMST5551-7-F does not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 certification, PMST5550,115 is the appropriate substitute.

Q: Do all parts use the same package and mounting type?

A: Yes. PMST5550,135, PMST5550,115, and MMST5551-7-F all use SC-70 / SOT-323 surface mount packages. No PCB layout modifications are required when substituting between these parts.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life and no special moisture control requirements during storage or handling.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are RoHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for electronic component manufacturing and use.