MMBT2907A-D87Z PNP Bipolar Junction Transistor Equivalent & Substitute Parts

Part Overview

The MMBT2907A-D87Z is a PNP bipolar junction transistor manufactured by onsemi, designed for surface mount applications in the SOT-23-3 package. This device operates at 60V collector-emitter breakdown voltage with a maximum collector current of 800 mA and 350 mW power dissipation. The part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, frequency response, and thermal characteristics while meeting modern product status and compliance requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector-Emitter Breakdown Voltage (Max)	60	V
Collector Current (Max)	800	mA
Power Dissipation (Max)	350	mW
Transition Frequency	200	MHz
DC Current Gain (hFE Min)	100	@ 150mA, 10V
Vce Saturation (Max)	1.6	V @ 50mA, 500mA
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-3	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter compatibility with the MMBT2907A-D87Z:

Direct Substitutes (Electrical Equivalents): Parts that maintain all critical electrical parameters within the same operating envelope. These include identical or superior voltage ratings (60V minimum), collector current capacity (800 mA or higher), transition frequency (200 MHz or higher), and power dissipation (350 mW or higher). Direct substitutes must support the same DC current gain specification and saturation voltage characteristics.

Similar Substitutes (Functional Alternatives): Parts that share the same package type (SOT-23-3), transistor polarity (PNP), and operating temperature range but operate within reduced electrical specifications. These components are suitable for applications where the full electrical capability of the original part is not required, such as lower current or lower frequency circuits.

The substitution logic is based strictly on the following parameters:

Transistor polarity (PNP)
Package compatibility (SOT-23-3 / TO-236-3 / SC-59)
Voltage rating (minimum 60V for direct substitutes)
Current capacity (minimum 800 mA for direct substitutes)
Frequency response (minimum 200 MHz for direct substitutes)
Power dissipation (minimum 350 mW for direct substitutes)
Operating temperature range (-55°C to 150°C)

Parameter Comparison

Part Number	Manufacturer	Status	Ic (Max) mA	Vce(br) V	Power mW	fT MHz	hFE Min	Package
MMBT2907A-D87Z	onsemi	Obsolete	800	60	350	200	100	SOT-23-3
BSR16	Fairchild Semiconductor	Active	800	60	350	200	100	SOT-23-3
MMBT2907ALT3G	onsemi	Active	600	60	300	200	100	SOT-23-3
MMBT2907ALT1G	onsemi	Active	600	60	300	200	100	SOT-23-3
SMMBT2907ALT1G	onsemi	Active	600	60	300	200	100	SOT-23-3
2STR2160	STMicroelectronics	Active	1000	60	500	—	180	SOT-23-3
BC856ALT1G	onsemi	Active	100	65	300	100	125	SOT-23-3
BC856BLT1G	onsemi	Active	100	65	300	100	220	SOT-23-3
BC856BLT3G	onsemi	Active	100	65	300	100	220	SOT-23-3
BC856,215	Nexperia USA Inc.	Active	100	65	250	100	125	SOT-23-3
BC856A,215	Nexperia USA Inc.	Active	100	65	250	100	125	SOT-23-3

Engineering Selection Recommendations

Direct Electrical Equivalent:

The BSR16 manufactured by Fairchild Semiconductor is the primary direct substitute for the MMBT2907A-D87Z. This part maintains identical electrical specifications across all critical parameters: 800 mA collector current, 60V breakdown voltage, 350 mW power dissipation, and 200 MHz transition frequency. The BSR16 is in active product status with 42,000 units in stock, ensuring supply continuity. Both parts share the SOT-23-3 package and identical DC current gain characteristics. The BSR16 is suitable for direct replacement in existing designs without circuit modification.

Active onsemi Alternatives:

The MMBT2907ALT1G and MMBT2907ALT3G are active onsemi products within the same MMBT2907 base product family. These parts operate at reduced collector current (600 mA maximum) and power dissipation (300 mW) compared to the original specification. Both maintain the 60V voltage rating and 200 MHz transition frequency. These alternatives are appropriate for applications where the full 800 mA current capability is not required. The MMBT2907ALT1G offers 1,598,400 units in stock, providing excellent availability. The SMMBT2907ALT1G variant is available in Tape & Reel packaging with 35,300 units in stock.

Higher Current Alternative:

The 2STR2160 from STMicroelectronics provides enhanced current capacity at 1 A maximum collector current with 500 mW power dissipation, maintaining the 60V voltage rating. This part is suitable for applications requiring higher current handling than the original specification. The device is in active status with 191,100 units available.

Lower Current Alternatives:

The BC856 series (BC856ALT1G, BC856BLT1G, BC856BLT3G from onsemi, and BC856,215 and BC856A,215 from Nexperia) are suitable only for applications with significantly reduced current requirements (100 mA maximum). These parts operate at 65V breakdown voltage and 100 MHz transition frequency, representing reduced electrical capability. The Nexperia variants (BC856,215 and BC856A,215) carry AEC-Q101 automotive qualification and are available in automotive-grade packaging.

Compliance and Availability:

All recommended substitutes are RoHS3 compliant and REACH unaffected. The onsemi MMBT2907ALT1G variant offers the highest inventory availability at 1,598,400 units. For applications requiring automotive-grade components, the Nexperia BC856 variants provide AEC-Q101 qualification.

Frequently Asked Questions (FAQ)

Q: Can the BSR16 replace the MMBT2907A-D87Z in all applications?

A: Yes. The BSR16 maintains identical electrical specifications across all critical parameters including collector current (800 mA), breakdown voltage (60V), power dissipation (350 mW), and transition frequency (200 MHz). Direct substitution is possible without circuit modification.

Q: What is the difference between MMBT2907ALT1G and MMBT2907ALT3G?

A: Both parts are electrically identical with 600 mA maximum collector current and 300 mW power dissipation. The primary difference is packaging: MMBT2907ALT1G is supplied in Cut Tape (CT) & Digi-Reel format, while MMBT2907ALT3G is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements.

Q: Can I use BC856 series parts as substitutes?

A: BC856 series parts are not direct substitutes. These devices operate at significantly reduced collector current (100 mA maximum) and transition frequency (100 MHz). They are suitable only for applications where the original part's full electrical capability is not required. Circuit redesign may be necessary.

Q: Is the 2STR2160 a suitable upgrade?

A: The 2STR2160 provides enhanced specifications with 1 A maximum collector current and 500 mW power dissipation while maintaining the 60V voltage rating. This part is suitable for applications requiring higher current handling. The transition frequency specification is not provided for this device.

Q: Are all substitute parts available in SOT-23-3 packaging?

A: Yes. All listed substitute parts are available in SOT-23-3 package (also designated as TO-236-3 or SC-59). Package compatibility is maintained across all alternatives.

Q: What is the significance of product status (Active vs. Obsolete)?

A: The original MMBT2907A-D87Z is classified as obsolete, meaning onsemi no longer manufactures this specific variant. Active substitutes ensure long-term supply availability and support for new designs and production continuity. All recommended substitutes carry active product status.

Q: Do the Nexperia BC856 variants offer any advantages?

A: The Nexperia BC856,215 and BC856A,215 variants carry AEC-Q101 automotive qualification, making them suitable for automotive applications. However, these parts operate at reduced electrical specifications (100 mA collector current, 100 MHz frequency) compared to the original MMBT2907A-D87Z.

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

A: All listed parts carry MSL (Moisture Sensitivity Level) 1, indicating unlimited shelf life without moisture control requirements. This specification is consistent across the original part and all substitutes.

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