MMBT2907A Equivalent & Substitute Parts

Part Overview

The MMBT2907A is a PNP bipolar junction transistor manufactured by STMicroelectronics, designed for general-purpose switching and amplification applications. This device operates at 60 V collector-emitter breakdown voltage with a maximum collector current of 600 mA and transition frequency of 200 MHz. 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, gain characteristics, and thermal performance while accommodating different packaging and manufacturer specifications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector-Emitter Breakdown Voltage (Max)	60	V
Collector Current (Max)	600	mA
Vce Saturation (Max) @ Ib, Ic	1.6 V @ 50 mA, 500 mA	V
Collector Cutoff Current (Max)	10	nA
DC Current Gain (hFE Min) @ Ic, Vce	100 @ 150 mA, 10 V	—
Power Dissipation (Max)	350	mW
Transition Frequency	200	MHz
Operating Temperature (Max)	150	°C
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MMBT2907A is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Transistor polarity: PNP
Collector-emitter breakdown voltage: 60 V (minimum)
Maximum collector current: 600 mA (minimum)
DC current gain (hFE): 100 minimum at specified test conditions
Vce saturation: 1.6 V maximum at rated conditions
Transition frequency: 200 MHz (minimum)

Mechanical & Environmental Criteria:

Package compatibility: SOT-23-3 (TO-236-3, SC-59) or equivalent footprint
Surface mount technology
Operating temperature range: minimum 150 °C junction temperature
RoHS3 compliance
Moisture sensitivity level: 1 (unlimited)

Substitution Logic: Parts are grouped as direct substitutes when all electrical parameters meet or exceed the MMBT2907A specifications and package footprints are mechanically compatible. Power dissipation ratings may vary (250 mW to 350 mW) without affecting substitution validity, as the MMBT2907A operates within the thermal envelope of all listed alternatives. Packaging format variations (Cut Tape, Tape & Reel, Digi-Reel) do not affect electrical substitution but influence procurement and assembly processes. Product status (Active, Obsolete, Last Time Buy) indicates availability and long-term supply viability.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	hFE (Min)	Power mW	Freq MHz	Temp °C	Package	Status
MMBT2907A	STMicroelectronics	600	60	100	350	200	150	SOT-23-3	Obsolete
BSR16,215	Nexperia USA Inc.	600	60	100	250	200	150	TO-236AB	Active
MMBT2907A-7-F	Diodes Incorporated	600	60	100	300	200	-55 to 150	SOT-23-3	Active
MMBT2907A-G	Comchip Technology	600	60	100	250	200	-55 to 150	SOT-23-3	Obsolete
MMBT2907A-TP	Micro Commercial Co	600	60	100	350	200	-55 to 150	SOT-23-3	Active
MMBT2907ALT1G	onsemi	600	60	100	300	200	-55 to 150	SOT-23-3	Active
MMBT2907ALT1HTSA1	Infineon Technologies	600	60	100	330	200	150	PG-SOT23	Last Time Buy
PMBT2907A,215	NXP Semiconductors	600	60	100	250	200	150	TO-236AB	Active
PMBT2907A,235	Nexperia USA Inc.	600	60	100	250	200	150	TO-236AB	Active
SMMBT2907ALT1G	onsemi	600	60	100	300	200	-55 to 150	SOT-23-3	Active
SMMBT2907ALT3G	onsemi	600	60	100	300	200	-55 to 150	SOT-23-3	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compatibility):

The following parts are recommended as primary substitutes due to active product status and complete electrical equivalence:

MMBT2907A-7-F (Diodes Incorporated): Active status with extended operating temperature range (-55 °C to 150 °C), AEC-Q101 automotive qualification, and SOT-23-3 package compatibility. Suitable for applications requiring automotive-grade reliability.
MMBT2907A-TP (Micro Commercial Co): Active status with extended temperature range and 350 mW power rating matching the original MMBT2907A. Maintains SOT-23-3 footprint compatibility.
MMBT2907ALT1G (onsemi): Active status with extended temperature range (-55 °C to 150 °C) and high inventory availability (1,598,400 units). SOT-23-3 package ensures direct PCB compatibility.
SMMBT2907ALT1G and SMMBT2907ALT3G (onsemi): Active status with extended temperature range and Tape & Reel packaging. Both provide 300 mW power dissipation and identical electrical specifications.

Secondary Substitutes (Active Status, Package Variation):

PMBT2907A,215 and PMBT2907A,235 (NXP Semiconductors / Nexperia USA Inc.): Active status with AEC-Q101 automotive qualification. TO-236AB package is mechanically compatible with SOT-23-3 footprints. Suitable for automotive applications.
BSR16,215 (Nexperia USA Inc.): Active status with AEC-Q101 automotive qualification and TO-236AB package. Recommended for automotive-grade designs.

Transitional Substitutes (Last Time Buy Status):

MMBT2907ALT1HTSA1 (Infineon Technologies): Last Time Buy status indicates limited future availability. Suitable for current production runs but not recommended for new long-term designs.

Avoid (Obsolete Status):

MMBT2907A-G (Comchip Technology): Obsolete status indicates discontinued production and uncertain supply.

Frequently Asked Questions (FAQ)

Q: Can MMBT2907A substitutes be used interchangeably on existing PCBs?

A: Yes, all listed substitutes maintain SOT-23-3 or mechanically equivalent TO-236AB package footprints. Direct PCB replacement is possible without layout modifications. Verify package designation on your specific PCB silkscreen to confirm compatibility.

Q: What is the difference between SOT-23-3 and TO-236AB packages?

A: SOT-23-3 and TO-236AB are mechanically equivalent surface-mount packages with identical pin spacing and footprint dimensions. Both designations refer to the same physical package used by different manufacturers. PCB footprints are interchangeable.

Q: Are automotive-qualified substitutes required for all applications?

A: Automotive-qualified parts (AEC-Q101 certified) are required only for automotive applications. For general industrial and consumer applications, non-automotive substitutes provide equivalent electrical performance. Verify application requirements before selection.

Q: Why do some substitutes have lower power ratings (250 mW vs. 350 mW)?

A: Power dissipation ratings reflect thermal design margins. A 250 mW rated part operates within safe thermal limits at the specified maximum junction temperature. Lower power ratings do not indicate reduced performance; they reflect conservative thermal design. Selection depends on circuit power dissipation requirements.

Q: What is the significance of extended temperature range (-55 °C to 150 °C)?

A: Extended temperature range indicates the device operates reliably across a wider ambient temperature spectrum. The original MMBT2907A specifies 150 °C maximum junction temperature only. Extended-range substitutes provide additional thermal margin for applications in extreme environments. Standard-range parts are sufficient for typical industrial conditions.

Q: How does product status (Active, Obsolete, Last Time Buy) affect substitution decisions?

A: Active status indicates ongoing production and long-term supply availability, suitable for new designs. Obsolete status indicates discontinued production with uncertain supply, appropriate only for legacy system maintenance. Last Time Buy status indicates limited remaining inventory; use only for current production runs with defined end dates.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitutes are RoHS3 compliant. The MMBT2907A and all alternatives meet RoHS3 environmental standards, ensuring compatibility with regulatory requirements across global markets.

Q: Can I use PMBT2907A,215 or PMBT2907A,235 in place of MMBT2907A?

A: Yes, PMBT2907A variants are direct electrical equivalents with identical electrical specifications. TO-236AB package is mechanically compatible with SOT-23-3 footprints. Both parts are suitable substitutes, with the advantage of active production status and automotive qualification.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape and Tape & Reel are packaging formats for delivery and handling, not electrical specifications. Cut Tape is supplied in individual strips for manual assembly. Tape & Reel is supplied on continuous reels for automated pick-and-place assembly. Electrical performance is identical; selection depends on assembly process requirements.

Q: Is the onsemi SMMBT2907ALT1G different from SMMBT2907ALT3G?

A: Both parts are electrically identical with matching specifications. The ALT1 and ALT3 designations indicate different manufacturing process revisions or date codes. Both are suitable substitutes with no functional differences for circuit design purposes.

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