PMST5401,115 Equivalent & Substitute Parts

Part Overview

The PMST5401,115 is a PNP bipolar junction transistor manufactured by NXP USA Inc., designed for surface mount applications in the SC-70 package. This component features a 150 V collector-emitter breakdown voltage, 300 mA maximum collector current, and 200 mW power dissipation capability, with a transition frequency of 300 MHz. The part is classified as obsolete, making identification of functionally equivalent active alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	150	V
Current - Collector (Ic) (Max)	300	mA
Power - Max	200	mW
Frequency - Transition	300	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 10mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	500mV @ 5mA, 50mA	—
Current - Collector Cutoff (Max)	50	nA
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the PMST5401,115 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

Transistor Type: PNP
Voltage - Collector Emitter Breakdown (Max): 150 V
Vce Saturation (Max) @ Ib, Ic: 500mV @ 5mA, 50mA
DC Current Gain (hFE) (Min) @ Ic, Vce: 60 @ 10mA, 5V
Current - Collector Cutoff (Max): 50 nA
Mounting Type: Surface Mount
Package / Case: SC-70 or SOT-323 compatible
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

Current - Collector (Ic) (Max): Equal to or greater than 300 mA
Power - Max: Equal to or greater than 200 mW
Frequency - Transition: Equal to or greater than 300 MHz
Operating Temperature Range: May extend beyond the original specification
Product Status: Active preferred over obsolete

The substitute parts listed below meet these criteria with variations only in parameters where higher ratings are acceptable for the application.

Parameter Comparison

Parameter	PMST5401,115 (NXP)	MMBT5401WT1G (onsemi)	MMST5401-7-F (Diodes Inc.)	MMST5401-TP (Micro Commercial)	PBHV9115T,215 (Nexperia)
Transistor Type	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	150 V	150 V	150 V	150 V	150 V
Current - Collector (Ic) (Max)	300 mA	500 mA	200 mA	200 mA	1 A
Power - Max	200 mW	400 mW	200 mW	200 mW	300 mW
Frequency - Transition	300 MHz	300 MHz	300 MHz	300 MHz	115 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 10mA, 5V	60 @ 10mA, 5V	60 @ 10mA, 5V	60 @ 10mA, 5V	100 @ 100mA, 10V
Vce Saturation (Max) @ Ib, Ic	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	300mV @ 100mA, 500mA
Current - Collector Cutoff (Max)	50 nA	50 nA	50 nA	50 nA	100 nA
Operating Temperature	150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	150°C (TJ)
Package / Case	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

MMBT5401WT1G (onsemi) — Recommended primary substitute. Active product status with extended operating temperature range (-55°C to 150°C). Exceeds original specifications in collector current (500 mA vs. 300 mA) and power dissipation (400 mW vs. 200 mW). Maintains identical electrical characteristics for gain, saturation voltage, and cutoff current. SC-70-3 (SOT323) package provides direct mechanical compatibility. High inventory availability (21,494 units) supports production continuity.

MMST5401-7-F (Diodes Incorporated) — Secondary substitute for applications with strict current limitations. Active product status with extended operating temperature range (-55°C to 150°C). Collector current specification (200 mA) is lower than the original part, requiring verification that application current demands do not exceed this limit. Maintains all other electrical parameters. SOT-323 package compatible. Adequate inventory (17,901 units) available.

MMST5401-TP (Micro Commercial Co) — Tertiary substitute with identical electrical specifications to MMST5401-7-F. Active product status with extended operating temperature range (-55°C to 150°C). Lower inventory availability (990 units) compared to other alternatives. Tape & Reel packaging suitable for high-volume production. Collector current specification (200 mA) requires application verification.

PBHV9115T,215 (Nexperia USA Inc.) — Alternative for applications requiring higher current capability (1 A) and improved saturation voltage performance (300 mV vs. 500 mV). Active product status. Transition frequency (115 MHz) is lower than the original specification, limiting use to applications not requiring the full 300 MHz bandwidth. Different package (TO-236AB vs. SC-70) requires PCB layout modification. Higher current gain (100 @ 100mA, 10V) differs from original specification. Suitable only when package change is acceptable and frequency requirements are reduced.

Frequently Asked Questions (FAQ)

Q: Can MMBT5401WT1G directly replace PMST5401,115 without circuit modification?

A: Yes. MMBT5401WT1G maintains all critical electrical parameters (breakdown voltage, saturation voltage, current gain, cutoff current) and package compatibility (SC-70/SOT-323). The higher current and power ratings provide design margin without requiring circuit changes.

Q: Why does PBHV9115T,215 have a lower transition frequency (115 MHz vs. 300 MHz)?

A: PBHV9115T,215 is a different device within the Nexperia PNP transistor family, optimized for higher current applications (1 A) rather than high-frequency performance. Selection of this part is appropriate only when application frequency requirements are below 115 MHz and higher current capability is needed.

Q: What is the impact of using MMST5401-7-F with a 200 mA maximum collector current in a circuit designed for 300 mA?

A: Direct substitution is not suitable. The application must be analyzed to confirm that actual operating collector current does not exceed 200 mA. If the circuit requires 300 mA operation, MMBT5401WT1G (500 mA rating) is the appropriate choice.

Q: Are all substitute parts RoHS3 compliant and MSL Level 1?

A: Yes. All listed substitute parts meet ROHS3 compliance and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original PMST5401,115 specifications.

Q: What is the difference between SC-70 and SOT-323 package designations?

A: SC-70 and SOT-323 refer to the same physical package format. Both designations are used interchangeably in industry documentation. All substitute parts listed are compatible with SC-70/SOT-323 footprints.

Q: Why is MMBT5401WT1G recommended as the primary substitute despite higher ratings?

A: Higher electrical ratings (500 mA vs. 300 mA, 400 mW vs. 200 mW) provide design margin and do not compromise circuit function. The part maintains all critical electrical characteristics, is active in production, has extended temperature range, and offers superior inventory availability for production support.

Q: Can PBHV9115T,215 be used in high-frequency switching applications?

A: No. The 115 MHz transition frequency is insufficient for applications requiring 300 MHz operation. Use MMBT5401WT1G, MMST5401-7-F, or MMST5401-TP for frequency-critical designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message