MMBT5401-D87Z Equivalent & Substitute Parts

Part Overview

The MMBT5401-D87Z is a PNP bipolar junction transistor manufactured by onsemi, designed for surface mount applications in the SOT-23-3 package. This component operates at 150 V collector-emitter breakdown voltage with a maximum collector current of 600 mA and 350 mW power dissipation. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage ratings, current capacity, and thermal characteristics while accommodating different packaging options and manufacturer specifications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	150	V
Current - Collector (Ic) (Max)	600	mA
Power - Max	350	mW
Frequency - Transition	300	MHz
Vce Saturation (Max) @ Ib, Ic	500mV @ 5mA, 50mA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 10mA, 5V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the MMBT5401-D87Z is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type must be PNP
Voltage - Collector Emitter Breakdown (Max) must be 150 V or greater
Current - Collector (Ic) (Max) must be 600 mA or greater
Package must be SOT-23-3 (TO-236-3, SC-59) or compatible surface mount variant
Operating temperature range must encompass -55°C to 150°C
Vce Saturation and DC Current Gain must meet or exceed specified minimums

Secondary Compatibility Factors:

Frequency - Transition rating of 300 MHz or greater preferred for direct substitution
Power dissipation rating of 350 mW or greater for thermal equivalence
RoHS3 compliance and REACH unaffected status for regulatory alignment

Substitute parts are grouped into three categories: onsemi variants with reduced current ratings (500 mA), direct manufacturer alternatives from Diodes Incorporated and Comchip Technology, and parametric equivalents from alternative manufacturers. Each category maintains core electrical specifications while accommodating variations in packaging format, frequency response, and power rating.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce Breakdown (Max) V	Power (Max) mW	Frequency MHz	hFE (Min)	Package	Status
MMBT5401-D87Z	onsemi	600	150	350	300	60	SOT-23-3	Obsolete
MMBT5401LT1G	onsemi	500	150	300	300	60	SOT-23-3	Active
MMBT5401LT3G	onsemi	500	150	300	300	60	SOT-23-3	Active
NSVMMBT5401LT3G	onsemi	500	150	225	300	60	SOT-23-3	Active
SMMBT5401LT1G	onsemi	500	150	300	300	60	SOT-23-3	Active
MMBT5401-7-F	Diodes Incorporated	600	150	300	300	60	SOT-23-3	Active
ZXTP5401FLTA	Diodes Incorporated	600	150	330	100	60	SOT-23-3	Active
MMBT5401-G	Comchip Technology	600	150	300	100	100	SOT-23-3	Active
MMBT5401-TP	Micro Commercial Co	600	150	300	100	100	SOT-23-3	Active
PBHV9115T,215	Nexperia USA Inc.	1000	150	300	115	100	TO-236AB	Active
CMPT5401 TR PBFREE	Central Semiconductor Corp	600	150	350	300	60	SOT-23	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (600 mA Current Rating):

The MMBT5401-7-F (Diodes Incorporated) and CMPT5401 TR PBFREE (Central Semiconductor Corp) maintain the full 600 mA collector current specification of the original MMBT5401-D87Z. Both parts are active products with RoHS3 compliance. The MMBT5401-7-F carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. The CMPT5401 matches the original 350 mW power rating and 300 MHz transition frequency, providing the closest parametric alignment.

Reduced Current Alternatives (500 mA Current Rating):

The onsemi variants MMBT5401LT1G, MMBT5401LT3G, and SMMBT5401LT1G operate at 500 mA maximum collector current, representing a 17% reduction from the original specification. These parts are suitable for applications where the design margin permits lower current capacity. All three maintain 300 MHz transition frequency and are available in high inventory quantities. The NSVMMBT5401LT3G variant operates at reduced power dissipation (225 mW) and is appropriate for thermally constrained applications.

Alternative Manufacturer Options:

The MMBT5401-G (Comchip Technology) and MMBT5401-TP (Micro Commercial Co) provide 600 mA current capacity with enhanced DC current gain (hFE minimum of 100 versus 60), though transition frequency is reduced to 100 MHz. These parts are suitable for low-frequency switching applications where the reduced frequency response does not impact circuit performance.

Higher Current Capability:

The PBHV9115T,215 (Nexperia USA Inc.) provides 1 A collector current capacity in a TO-236AB package, offering increased current headroom for applications requiring higher drive capability. This part is appropriate for designs where additional current margin is beneficial.

Packaging Considerations:

All recommended substitutes are available in surface mount packages compatible with SOT-23-3 footprints. Packaging variants (Cut Tape, Tape & Reel, Digi-Reel) affect supply chain logistics but do not impact electrical performance or PCB assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can MMBT5401LT1G or MMBT5401LT3G be used as direct replacements for MMBT5401-D87Z?

A: These onsemi variants are electrically compatible for applications where the design operates below 500 mA collector current. Both parts maintain identical voltage ratings (150 V), saturation characteristics, and operating temperature range. The 300 MHz transition frequency matches the original specification. If the circuit design requires the full 600 mA capability, these parts are not suitable.

Q: What is the difference between MMBT5401LT1G and MMBT5401LT3G?

A: Both parts are electrically identical with 500 mA current rating, 150 V voltage rating, and 300 MHz frequency response. The difference is packaging format: MMBT5401LT1G is supplied in Cut Tape (CT) & Digi-Reel format, while MMBT5401LT3G is supplied in Tape & Reel (TR) format. Selection depends on assembly equipment compatibility and supply chain requirements.

Q: Is ZXTP5401FLTA a suitable substitute despite the 100 MHz frequency rating?

A: The ZXTP5401FLTA maintains full 600 mA current capacity and 150 V voltage rating with 330 mW power dissipation. The 100 MHz transition frequency is lower than the original 300 MHz specification. This part is suitable for applications where switching frequency does not exceed 100 MHz. For high-frequency switching circuits, the reduced frequency response may limit performance.

Q: Why does CMPT5401 TR PBFREE match the original part more closely than other substitutes?

A: The CMPT5401 TR PBFREE maintains all critical parameters of the MMBT5401-D87Z: 600 mA collector current, 150 V voltage rating, 350 mW power dissipation, and 300 MHz transition frequency. DC current gain (hFE minimum of 60) and saturation characteristics are identical. This part provides the closest parametric equivalence for direct substitution.

Q: Can PBHV9115T,215 be used in place of MMBT5401-D87Z?

A: The PBHV9115T,215 provides higher current capacity (1 A versus 600 mA) and maintains the 150 V voltage rating. However, transition frequency is reduced to 115 MHz and saturation voltage is lower (300 mV @ 100mA, 500mA versus 500 mV @ 5mA, 50mA). This part is suitable for low-frequency applications where the increased current capability is beneficial and the reduced frequency response does not impact circuit operation.

Q: What is the significance of RoHS3 compliance for substitute selection?

A: RoHS3 compliance indicates the part meets European Union Restriction of Hazardous Substances regulations, restricting lead and other hazardous materials. All recommended active substitutes carry RoHS3 compliance, ensuring regulatory alignment with modern manufacturing and environmental standards. The original MMBT5401-D87Z does not specify RoHS status, making active RoHS3-compliant alternatives preferable for new designs.

Q: Are there performance differences between manufacturers for the same part number designation?

A: Yes. The MMBT5401 designation is used by multiple manufacturers (onsemi, Diodes Incorporated, Comchip Technology, Micro Commercial Co) with variations in DC current gain (hFE ranging from 60 to 100), transition frequency (100 MHz to 300 MHz), and power rating (300 mW to 350 mW). While all maintain the core 150 V voltage and 600 mA current specifications, these variations affect circuit performance in frequency-dependent and gain-dependent applications.

Q: What packaging format should be selected for high-volume production?

A: Tape & Reel (TR) format is standard for high-volume automated assembly. Cut Tape (CT) and Digi-Reel formats are suitable for lower-volume or mixed-component assembly. All recommended substitutes are available in TR format. Packaging selection should align with assembly equipment capabilities and supply chain logistics rather than electrical performance, as all formats provide identical electrical characteristics.

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