MMBT5401-7 Equivalent & Substitute Parts

Part Overview

The MMBT5401-7 is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-23-3 package. This component operates at 150V collector-emitter breakdown voltage with a maximum collector current of 600 mA and 300 mW power dissipation. The part is qualified to AEC-Q101 automotive standards and operates across a temperature range of -55°C to 150°C.

The MMBT5401-7 has been discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility while meeting current availability and compliance requirements. Substitute parts must satisfy the electrical and mechanical parameters required for direct replacement or functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	150	V
Current - Collector (Ic) (Max)	600	mA
Power - Max	300	mW
Frequency - Transition	300	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 10mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	500mV @ 5mA, 50mA	—
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the MMBT5401-7 are classified based on adherence to critical electrical and mechanical parameters. The substitution logic is structured around the following key parameters:

Critical Parameters for Substitution:

Transistor Type: PNP (mandatory)
Voltage - Collector Emitter Breakdown: 150V (minimum requirement)
Package / Case: SOT-23-3 compatible footprint (mechanical compatibility)
Operating Temperature Range: -55°C to 150°C (functional range)
Vce Saturation: 500mV @ 5mA, 50mA (switching characteristics)
Current - Collector Cutoff (ICBO): 50nA (leakage specification)

Flexible Parameters (within acceptable ranges):

Current - Collector (Ic) (Max): 500-600 mA (parts rated 500 mA or higher are acceptable)
Power - Max: 200-350 mW (parts rated 200 mW or higher are acceptable)
Frequency - Transition: 100-300 MHz (parts rated 100 MHz or higher are acceptable)
DC Current Gain (hFE): 60-100 @ 10mA, 5V (parts meeting or exceeding minimum specification)

Substitute parts are grouped into two categories:

Parametric Equivalent: Parts that match all critical electrical parameters and package specifications, with identical or superior performance characteristics.

Functional Equivalent: Parts that satisfy critical electrical parameters and package requirements but may have variations in secondary parameters such as transition frequency or power dissipation, provided these variations do not compromise circuit functionality.

Parameter Comparison

Parameter	MMBT5401-7 (Diodes)	MMBT5401-7-F (Diodes)	MMST5401-7-F (Diodes)	MMBT5401-G (Comchip)	CMPT5401 TR PBFREE (Central Semi)	MMBT5401-TP (Micro Commercial)	MMBT5401_R1_00001 (Panjit)	MMBT5401LT1G (onsemi)	MMBT5401LT3G (onsemi)	PBHV9115T,215 (Nexperia)
Transistor Type	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	150V	150V	150V	150V	150V	150V	150V	150V	150V	150V
Current - Collector (Ic) (Max)	600 mA	600 mA	200 mA	600 mA	600 mA	600 mA	600 mA	500 mA	500 mA	1 A
Power - Max	300 mW	300 mW	200 mW	300 mW	350 mW	300 mW	225 mW	300 mW	300 mW	300 mW
Frequency - Transition	300 MHz	300 MHz	300 MHz	100 MHz	300 MHz	100 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	100 @ 10mA, 5V	60 @ 10mA, 5V	100 @ 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	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	500mV @ 5mA, 50mA	300mV @ 100mA, 500mA
Current - Collector Cutoff (Max)	50nA	50nA	50nA	100nA	50nA	100nA	50nA	50nA	50nA	100nA
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-65 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	to 150°C
Package / Case	SOT-23-3	SOT-23-3	SOT-323	SOT-23-3	SOT-23	SOT-23	SOT-23	SOT-23-3	SOT-23-3	TO-236AB
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Parametric Equivalent - Direct Replacement:

The MMBT5401-7-F (Diodes Incorporated) is the parametric equivalent and primary replacement for the discontinued MMBT5401-7. This part maintains identical electrical specifications including 600 mA collector current, 300 mW power dissipation, 300 MHz transition frequency, and SOT-23-3 package compatibility. The MMBT5401-7-F is currently in active production status with 2740 units in stock and carries ROHS3 compliance, addressing the RoHS non-compliance status of the original part.

Functional Equivalents - Alternative Selections:

The MMBT5401LT1G and MMBT5401LT3G (onsemi) are functional equivalents with 500 mA maximum collector current, meeting or exceeding the critical electrical parameters. Both parts are rated for 300 MHz transition frequency, 300 mW power dissipation, and SOT-23-3 package compatibility. The MMBT5401LT1G is available in Cut Tape & Digi-Reel packaging with 305,200 units in stock, while the MMBT5401LT3G is available in Tape & Reel with 10,300 units in stock. Both are ROHS3 compliant and active production status.

The CMPT5401 TR PBFREE (Central Semiconductor Corp) is a functional equivalent with 600 mA collector current and 350 mW power dissipation, exceeding the original specification. This part operates at 300 MHz transition frequency and is available in Tape & Reel packaging with 34,590 units in stock. The extended operating temperature range of -65°C to 150°C provides additional margin. ROHS3 compliance is confirmed.

The MMBT5401-TP (Micro Commercial Co) and MMBT5401_R1_00001 (Panjit International) are functional equivalents with 600 mA collector current. The MMBT5401-TP operates at 100 MHz transition frequency with 300 mW power dissipation, while the MMBT5401_R1_00001 operates at 300 MHz with 225 mW power dissipation. Both are ROHS3 compliant and in active production.

Limited Substitution - Reduced Current Rating:

The MMST5401-7-F (Diodes Incorporated) is a reduced-current variant with 200 mA maximum collector current and 200 mW power dissipation. This part is suitable only for applications where collector current does not exceed 200 mA. The SOT-323 package differs from the original SOT-23-3, requiring PCB layout verification. This part is ROHS3 compliant and in active production with 17,901 units in stock.

Alternative Manufacturer - Comchip Technology:

The MMBT5401-G (Comchip Technology) provides 600 mA collector current and 300 mW power dissipation with SOT-23-3 package compatibility. This part operates at 100 MHz transition frequency and carries a higher DC current gain specification of 100 @ 10mA, 5V. ROHS3 compliance is confirmed with 12,601 units in stock.

Higher Current Alternative - Nexperia:

The PBHV9115T,215 (Nexperia USA Inc.) is a higher-current alternative rated for 1 A maximum collector current with 300 mW power dissipation and TO-236AB package compatibility. This part operates at 115 MHz transition frequency and features improved saturation characteristics (300mV @ 100mA, 500mA). ROHS3 compliance is confirmed with 5,214 units in stock. This part is suitable for applications requiring higher current capacity.

Frequently Asked Questions (FAQ)

Q: Can the MMBT5401-7-F directly replace the discontinued MMBT5401-7?

A: Yes. The MMBT5401-7-F is the parametric equivalent with identical electrical specifications, including 600 mA collector current, 150V breakdown voltage, 300 mW power dissipation, 300 MHz transition frequency, and SOT-23-3 package compatibility. The primary difference is ROHS3 compliance status. No circuit modifications are required.

Q: What is the difference between SOT-23-3 and SOT-323 packages?

A: SOT-23-3 and SOT-323 are distinct surface mount packages with different physical dimensions and pin spacing. SOT-23-3 (also designated TO-236-3 or SC-59) is larger than SOT-323. The MMST5401-7-F uses SOT-323 packaging, which requires verification of PCB footprint compatibility before substitution. Direct pin-for-pin replacement on a SOT-23-3 footprint is not possible.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except the original MMBT5401-7, which is RoHS non-compliant. This compliance improvement is a benefit of transitioning to active production alternatives.

Q: Which substitute part has the highest collector current rating?

A: The PBHV9115T,215 (Nexperia) is rated for 1 A maximum collector current, exceeding the original 600 mA specification. This part is suitable for applications requiring higher current capacity while maintaining 150V breakdown voltage and SOT-23-3 compatible packaging.

Q: Can I use the MMBT5401LT1G or MMBT5401LT3G as direct replacements?

A: The MMBT5401LT1G and MMBT5401LT3G are functional equivalents with 500 mA maximum collector current, which is lower than the original 600 mA specification. These parts are suitable for applications where collector current does not exceed 500 mA. Both maintain 300 MHz transition frequency, 300 mW power dissipation, and SOT-23-3 package compatibility. Circuit verification is required to confirm that the 500 mA rating is sufficient for the application.

Q: What is the significance of the DC Current Gain (hFE) specification?

A: DC Current Gain (hFE) determines the base current required to achieve a specified collector current. The original MMBT5401-7 specifies a minimum hFE of 60 @ 10mA, 5V. Substitute parts with higher hFE values (such as 100 @ 10mA, 5V) require less base current for the same collector current, potentially improving circuit efficiency. Parts meeting or exceeding the minimum specification are acceptable.

Q: Are there packaging options other than SOT-23-3?

A: Yes. The CMPT5401 TR PBFREE and MMBT5401-TP are available in SOT-23 packaging, which is compatible with SOT-23-3 footprints. The PBHV9115T,215 is available in TO-236AB packaging, which is mechanically compatible with SOT-23-3. The MMST5401-7-F uses SOT-323 packaging, which requires footprint verification.

Q: What is the difference between Cut Tape & Digi-Reel and Tape & Reel packaging formats?

A: Cut Tape & Digi-Reel format provides components on cut tape suitable for manual handling or small-scale assembly. Tape & Reel format provides components on continuous reel tape suitable for automated pick-and-place assembly equipment. Both formats contain the same component; the difference is in the delivery and handling method. Selection depends on assembly process requirements.

Q: Which substitute part offers the best inventory availability?

A: The MMBT5401LT1G (onsemi) offers the highest inventory availability with 305,200 units in stock. The CMPT5401 TR PBFREE (Central Semiconductor) is the second option with 34,590 units in stock. Both parts are ROHS3 compliant and in active production status.

Q: Can I use a substitute part with lower power dissipation rating?

A: Substitute parts with lower power dissipation ratings (such as the MMST5401-7-F at 200 mW) are acceptable only if the circuit application does not exceed the specified power dissipation limit. The original MMBT5401-7 is rated for 300 mW. If the circuit requires 300 mW dissipation capability, a substitute part must be rated for 300 mW or higher.

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