MMBT2907 Equivalent & Substitute Parts

Part Overview

The MMBT2907 is a PNP bipolar junction transistor manufactured by onsemi, housed in a SOT-23-3 surface mount package. This component is rated for 40 V collector-emitter breakdown voltage and 800 mA maximum collector current, with a maximum power dissipation of 350 mW. The MMBT2907 is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the application circuit.

Key Parameters

Parameter	MMBT2907 Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	40	V
Current - Collector (Ic) (Max)	800	mA
Power - Max	350	mW
Vce Saturation (Max) @ Ib, Ic	1.6V @ 50mA, 500mA	V
Current - Collector Cutoff (Max)	20	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 150mA, 10V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MMBT2907 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type must be PNP
Collector-emitter breakdown voltage must equal or exceed 40 V
Maximum collector current must equal or exceed 800 mA
Maximum power dissipation must equal or exceed 350 mW
Package must be SOT-23-3 (TO-236-3, SC-59) for direct mechanical compatibility
Operating temperature range must encompass -55°C to 150°C

Secondary Compatibility Parameters:

Vce saturation characteristics
DC current gain (hFE) specifications
Collector cutoff current (ICBO)

Parts are grouped into three categories based on substitution suitability:

Direct Equivalents (Active Status): Parts meeting all primary criteria with identical or superior electrical ratings and active product status.

Functional Substitutes (Same Package, Relaxed Voltage/Current): Parts with SOT-23-3 packaging but lower voltage or current ratings, suitable only when circuit design permits reduced headroom.

Alternative Substitutes (Different Package): Parts with superior electrical ratings but different surface mount packages, requiring PCB layout modification.

Parameter Comparison

Part Number	Manufacturer	Vce Breakdown (V)	Ic Max (mA)	Power Max (mW)	Package	Status	Temp Range (°C)
MMBT2907	onsemi	40	800	350	SOT-23-3	Obsolete	-55 to 150
MMBT2907ALT1G	onsemi	60	600	300	SOT-23-3	Active	-55 to 150
NSS40200LT1G	onsemi	40	2000	460	SOT-23-3	Active	-55 to 150
MMBT589LT1G	onsemi	30	1000	310	SOT-23-3	Active	-55 to 150
NSS30100LT1G	onsemi	30	1000	310	SOT-23-3	Active	-55 to 150
NSVMMBT589LT1G	onsemi	30	1000	310	SOT-23-3	Active	-55 to 150
2SB1197KT146Q	Rohm Semiconductor	32	800	200	SOT-23-3	Active	-55 to 150
2SB1197KT146R	Rohm Semiconductor	32	800	200	SOT-23-3	Active	-55 to 150
BC807-16-7-F	Diodes Incorporated	45	500	310	SOT-23-3	Active	-55 to 150
BC807-25-7-F	Diodes Incorporated	45	500	310	SOT-23-3	Active	-55 to 150
30A02CH-TL-E	onsemi	30	700	700	3-CPH	Active	-55 to 150

Engineering Selection Recommendations

Recommended Direct Substitute:

NSS40200LT1G (onsemi) is the primary recommended substitute for the MMBT2907. This part maintains identical collector-emitter breakdown voltage (40 V), exceeds the maximum collector current requirement (2 A versus 800 mA), and provides superior power dissipation capability (460 mW versus 350 mW). The NSS40200LT1G is housed in the identical SOT-23-3 package, operates across the full temperature range (-55°C to 150°C), and carries active product status with RoHS3 compliance.

Alternative Direct Substitute:

MMBT2907ALT1G (onsemi) provides an active alternative with enhanced voltage rating (60 V versus 40 V). However, this part exhibits reduced maximum collector current (600 mA versus 800 mA) and lower power dissipation (300 mW versus 350 mW). Selection of MMBT2907ALT1G is appropriate only when circuit design permits operation at reduced current levels and the enhanced voltage margin is beneficial.

Functional Substitutes (Reduced Ratings):

MMBT589LT1G, NSS30100LT1G, and NSVMMBT589LT1G are functionally equivalent PNP transistors in SOT-23-3 packaging with 30 V breakdown voltage and 1 A maximum collector current. These parts are suitable for applications where the 40 V breakdown voltage of the MMBT2907 is not required and circuit design accommodates the lower voltage rating.

Substitutes with Reduced Current Capacity:

BC807-16-7-F and BC807-25-7-F (Diodes Incorporated) are PNP transistors with 45 V breakdown voltage but limited to 500 mA maximum collector current. These parts are suitable only for low-current applications and do not meet the 800 mA requirement of the original MMBT2907.

Rohm Semiconductor Alternatives:

2SB1197KT146Q and 2SB1197KT146R provide 32 V breakdown voltage and 800 mA maximum collector current in SOT-23-3 packaging. These parts are suitable substitutes when the 40 V rating of the MMBT2907 can be relaxed to 32 V. Both variants carry active product status and RoHS3 compliance.

Package Variant (Non-Standard):

30A02CH-TL-E (onsemi) offers superior electrical performance (30 V, 700 mA, 700 mW) but utilizes a 3-CPH package instead of SOT-23-3. This part requires PCB layout modification and is not recommended as a direct substitute without design review.

Frequently Asked Questions (FAQ)

Q: Can MMBT2907ALT1G directly replace MMBT2907 in all applications?

A: MMBT2907ALT1G is mechanically compatible (identical SOT-23-3 package) and electrically superior in voltage rating (60 V versus 40 V). However, the reduced maximum collector current (600 mA versus 800 mA) and power dissipation (300 mW versus 350 mW) may limit suitability in high-current applications. Circuit analysis is required to confirm compatibility.

Q: Is NSS40200LT1G a pin-for-pin replacement for MMBT2907?

A: Yes. NSS40200LT1G is housed in the identical SOT-23-3 package with matching pin configuration. Electrical ratings are equal or superior across all parameters: 40 V breakdown voltage, 2 A maximum collector current, and 460 mW power dissipation. Direct PCB substitution is supported.

Q: Why do MMBT589LT1G and NSS30100LT1G have identical electrical specifications?

A: These parts share the same base product number (MMBT589) and electrical characteristics but differ in packaging format and supplier designation. Both are active onsemi products with 30 V breakdown voltage, 1 A maximum collector current, and SOT-23-3 packaging. Selection between them depends on packaging preference (Tape & Reel versus alternative formats).

Q: Can BC807 series transistors substitute for MMBT2907?

A: BC807-16-7-F and BC807-25-7-F are mechanically compatible (SOT-23-3 package) but electrically limited. Maximum collector current is 500 mA, which is insufficient for applications requiring the full 800 mA capability of MMBT2907. These parts are suitable only for reduced-current designs.

Q: What is the difference between 2SB1197KT146Q and 2SB1197KT146R?

A: Both parts are Rohm Semiconductor PNP transistors with identical electrical ratings (32 V, 800 mA, 200 mW) and SOT-23-3 packaging. The primary difference is DC current gain specification: 2SB1197KT146Q specifies minimum hFE of 120 at 100 mA, while 2SB1197KT146R specifies minimum hFE of 180 at 100 mA. Selection depends on circuit gain requirements.

Q: Is the 30A02CH-TL-E a suitable replacement for MMBT2907?

A: 30A02CH-TL-E offers superior electrical performance (700 mW power dissipation, 700 mA collector current) but utilizes a 3-CPH package instead of SOT-23-3. Direct PCB substitution is not possible without layout modification. This part is suitable only when design flexibility permits package change.

Q: What compliance certifications should I verify for substitute parts?

A: All recommended substitute parts carry RoHS3 compliance and REACH Unaffected status, matching the environmental compliance profile of the MMBT2907. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all listed parts, indicating no special moisture handling requirements during assembly.

Q: Can I use MMBT2907ALT1G in a circuit designed for 40 V operation?

A: Yes. MMBT2907ALT1G has a 60 V breakdown voltage rating, which exceeds the 40 V requirement. The higher voltage rating provides additional safety margin. However, the reduced current capacity (600 mA versus 800 mA) must be verified against circuit current demands.

Q: Are there any temperature range limitations when substituting parts?

A: All recommended substitute parts operate across the full temperature range of the MMBT2907 (-55°C to 150°C). Temperature range compatibility is not a limiting factor in part selection. Verify specific application temperature requirements against the -55°C to 150°C specification common to all listed parts.

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