CMPT2907A BK PBFREE Equivalent & Substitute Parts

Part Overview

The CMPT2907A BK PBFREE is a PNP bipolar junction transistor manufactured by Central Semiconductor Corp, designed for surface mount applications in the SOT-23 package. This component operates at 60V collector-emitter breakdown voltage with a maximum collector current of 600 mA and 350 mW power dissipation. The part is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within broader electrical specifications. Alternative manufacturers and package variants provide flexibility in component sourcing while maintaining functional compatibility within defined parameter ranges.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector-Emitter Breakdown Voltage (Max)	60	V
Collector Current (Max)	600	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	-65 to 150	°C
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CMPT2907A BK PBFREE is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: PNP (mandatory)
Collector-Emitter Breakdown Voltage: 60V minimum (equal or greater)
Collector Current: 600 mA minimum (equal or greater)
Power Dissipation: 350 mW minimum (equal or greater)
Transition Frequency: 200 MHz minimum (equal or greater)
DC Current Gain (hFE): 100 minimum at specified conditions
Vce Saturation: 1.6V maximum at specified bias conditions
Package: SOT-23-3 / TO-236-3 / SC-59 (surface mount, same footprint)
RoHS Compliance: ROHS3 Compliant (mandatory)

Secondary Compatibility Factors:

Operating temperature range must encompass application requirements
Moisture sensitivity level MSL-1 (unlimited) is acceptable
Supplier device package designation may vary (SOT-23, SST3, SMT3, TO-236AB) provided physical footprint compatibility is maintained

Parts meeting all primary criteria are classified as direct substitutes. Parts exceeding one or more electrical parameters while maintaining package compatibility are classified as functional equivalents with enhanced performance margins.

Parameter Comparison

Part Number	Manufacturer	Vce(BR) Max (V)	Ic Max (mA)	Power Max (mW)	fT (MHz)	hFE Min	Vce Sat Max (V)	Package	Status
CMPT2907A BK PBFREE	Central Semiconductor	60	600	350	200	100	1.6	SOT-23	Active
SST2907AT116	Rohm Semiconductor	60	600	350	200	100	1.6	SST3	Not For New Designs
BCW68GR	Nexperia USA Inc.	45	800	250	80	160	0.45	TO-236AB	Active
BCW68HVL	Nexperia USA Inc.	45	800	250	80	250	0.45	TO-236AB	Active
BSR16	Fairchild Semiconductor	60	800	350	200	100	1.6	SOT-23-3	Active
BSR16,215	Nexperia USA Inc.	60	600	250	200	100	1.6	TO-236AB	Active
MMBT2907A RFG	Taiwan Semiconductor	60	600	350	200	100	1.6	SOT-23	Active
MMBT2907A-7-F	Diodes Incorporated	60	600	300	200	100	1.6	SOT-23-3	Active
MMBT2907A-G	Comchip Technology	60	600	250	200	100	1.6	SOT-23-3	Obsolete
MMBTA55LT1G	onsemi	60	500	225	50	100	0.25	SOT-23-3	Active
MMST2907AT146	Rohm Semiconductor	60	600	200	200	100	1.6	SMT3	Active

Engineering Selection Recommendations

Direct Substitutes (Electrical and Mechanical Equivalence):

MMBT2907A RFG (Taiwan Semiconductor Corporation) provides complete electrical and mechanical equivalence to CMPT2907A BK PBFREE. Both components share identical ratings for collector-emitter breakdown voltage (60V), collector current (600 mA), power dissipation (350 mW), transition frequency (200 MHz), and saturation characteristics. The part is in active product status with ROHS3 compliance. Operating temperature range extends to -55°C minimum, encompassing the CMPT2907A specification.

MMBT2907A-7-F (Diodes Incorporated) meets all primary electrical criteria with identical voltage, current, frequency, and gain specifications. Power dissipation is rated at 300 mW, which remains within acceptable margins for applications designed for 350 mW. AEC-Q101 automotive qualification and active product status support reliability in regulated applications. Operating temperature range is -55°C to 150°C.

BSR16,215 (Nexperia USA Inc.) provides electrical equivalence with 60V breakdown voltage, 600 mA collector current, and 200 MHz transition frequency. Power dissipation is specified at 250 mW, representing a reduction from the 350 mW rating. This part carries AEC-Q101 automotive qualification and active product status. Package designation is TO-236AB, maintaining SOT-23-3 footprint compatibility.

Functional Equivalents with Enhanced Performance:

BSR16 (Fairchild Semiconductor) exceeds primary specifications with 800 mA collector current and 350 mW power dissipation while maintaining 60V breakdown voltage and 200 MHz transition frequency. This part is suitable for applications requiring higher current capacity within the same voltage and frequency envelope. Active product status and extended operating temperature range (-55°C to 150°C) support broad application compatibility.

Parts Not Recommended for New Designs:

SST2907AT116 (Rohm Semiconductor) provides complete electrical equivalence but carries "Not For New Designs" product status. This designation indicates manufacturer discontinuation trajectory and should be avoided in new circuit development.

MMBT2907A-G (Comchip Technology) is classified as obsolete and is not suitable for new designs or long-term supply planning.

Parts with Reduced Performance Margins:

MMBTA55LT1G (onsemi) operates at 500 mA maximum collector current, below the 600 mA requirement. Transition frequency is limited to 50 MHz, significantly below the 200 MHz specification. This part is not suitable as a substitute for applications requiring full CMPT2907A performance.

BCW68GR and BCW68HVL (Nexperia USA Inc.) are rated for 45V collector-emitter breakdown voltage, below the 60V specification. These parts are not suitable for applications requiring 60V voltage margin.

Frequently Asked Questions (FAQ)

Q: Can MMBT2907A RFG be used as a direct replacement for CMPT2907A BK PBFREE?

A: Yes. MMBT2907A RFG meets all electrical specifications: 60V breakdown voltage, 600 mA collector current, 350 mW power dissipation, 200 MHz transition frequency, and 100 minimum hFE. Both components use SOT-23 package with identical footprint. The part is in active product status with ROHS3 compliance.

Q: What is the difference between SOT-23 and TO-236AB package designations?

A: SOT-23 and TO-236AB refer to the same physical package form factor with three leads in surface mount configuration. Supplier device package designations may vary by manufacturer while maintaining identical footprint and pin compatibility. Both are acceptable for PCB assembly with standard SOT-23 land patterns.

Q: Why is BSR16 listed as a functional equivalent rather than a direct substitute?

A: BSR16 exceeds the primary specification for collector current (800 mA versus 600 mA). While this represents enhanced performance capability, it is not a direct one-to-one replacement. Applications designed for 600 mA operation will function correctly with BSR16, but the higher current rating introduces a performance margin beyond the original design specification.

Q: Can MMBTA55LT1G replace CMPT2907A BK PBFREE?

A: No. MMBTA55LT1G is rated for 500 mA maximum collector current, below the 600 mA requirement. Transition frequency is 50 MHz, significantly below the 200 MHz specification. This part does not meet the electrical requirements for substitution.

Q: What does "Not For New Designs" product status mean?

A: "Not For New Designs" indicates that the manufacturer is discontinuing the product and recommends against its use in new circuit development. While existing inventory may be available, long-term supply cannot be guaranteed. SST2907AT116 carries this designation and should not be selected for new designs.

Q: Are BCW68GR and BCW68HVL suitable substitutes?

A: No. Both parts are rated for 45V collector-emitter breakdown voltage, below the 60V specification of CMPT2907A BK PBFREE. Applications requiring 60V voltage margin cannot use these parts. The reduced voltage rating creates a functional incompatibility.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard. Parts carrying this certification have undergone rigorous testing for reliability in automotive applications. BSR16,215 and MMBT2907A-7-F both carry AEC-Q101 qualification, making them suitable for automotive and high-reliability applications.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range must encompass the application's thermal requirements. CMPT2907A BK PBFREE specifies -65°C to 150°C. Substitute parts with -55°C to 150°C range are acceptable for applications operating above -55°C. MMBT2907A RFG and MMBT2907A-7-F meet this criterion.

Q: What is MSL-1 (Unlimited) moisture sensitivity rating?

A: MSL-1 indicates unlimited shelf life without moisture baking requirements. All listed substitute parts carry MSL-1 rating, eliminating moisture management concerns during storage and assembly.

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