CMPTA14 TR PBFREE Equivalent & Substitute Parts

Part Overview

The CMPTA14 TR PBFREE is an NPN Darlington bipolar junction transistor manufactured by Central Semiconductor Corp, designed for surface mount applications in the SOT-23 package. This active product operates at a maximum collector current of 500 mA with a 30 V collector-emitter breakdown voltage and 350 mW power dissipation. The device is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1) and is suitable for general-purpose switching and amplification circuits requiring Darlington configuration characteristics.

Equivalent and substitute parts are identified based on matching electrical specifications within the allowed parameter ranges for NPN Darlington transistors in surface mount packages, ensuring functional interchangeability in circuit applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Current - Collector (Ic) Max	500	mA
Voltage - Collector Emitter Breakdown (Max)	30	V
Vce Saturation (Max) @ Ib, Ic	1.5V @ 100µA, 100mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	20000 @ 100mA, 5V	—
Power - Max	350	mW
Frequency - Transition	125	MHz
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the CMPTA14 TR PBFREE are grouped based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Transistor type: NPN - Darlington configuration
Collector-emitter breakdown voltage: 30 V or higher
Maximum collector current: 500 mA or higher
Package type: TO-236-3, SC-59, or SOT-23-3 surface mount
Vce saturation characteristics: 1.5V or lower @ specified test conditions
DC current gain (hFE): 20000 or higher @ 100mA, 5V
Moisture sensitivity: MSL 1 (Unlimited)
RoHS compliance: ROHS3 Compliant

Substitute parts are classified into two categories:

Category A - Direct Electrical Equivalents (500 mA Rating): Parts matching the full 500 mA collector current specification with identical or superior electrical characteristics.

Category B - Functional Substitutes (300 mA Rating): Parts with reduced collector current (300 mA) suitable for applications not requiring the full 500 mA capability, offering alternative sourcing options.

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vce(br) (V)	Vce Sat @ Ib, Ic	hFE Min @ Ic, Vce	Power Max (mW)	Freq - Transition (MHz)	Temp Range (°C)	Package
CMPTA14 TR PBFREE	Central Semiconductor Corp	500	30	1.5V @ 100µA, 100mA	20000 @ 100mA, 5V	350	125	-65 to 150	SOT-23
PMBTA14,215	NXP Semiconductors	500	30	1.5V @ 100µA, 100mA	20000 @ 100mA, 5V	250	125	-55 to 150	TO-236AB
BCV27	onsemi	1200	30	1V @ 100µA, 100mA	20000 @ 100mA, 5V	350	220	-55 to 150	SOT-23-3
BCV27,215	Nexperia USA Inc.	500	30	1V @ 100µA, 100mA	20000 @ 100mA, 5V	250	220	-55 to 150	TO-236AB
PMBTA13,215	Nexperia USA Inc.	500	30	1.5V @ 100µA, 100mA	10000 @ 100mA, 5V	250	125	-55 to 150	TO-236AB
MMBTA14-7-F	Diodes Incorporated	300	30	1.5V @ 100µA, 100mA	20000 @ 100mA, 5V	300	125	-55 to 150	SOT-23-3
2SD2142KT146	Rohm Semiconductor	300	30	1.5V @ 100µA, 100mA	10000 @ 100mA, 5V	200	200	-55 to 150	SMT3
2SD1383KT146B	Rohm Semiconductor	300	32	1.5V @ 400µA, 200mA	5000 @ 100mA, 5V	200	250	-55 to 150	SMT3

Engineering Selection Recommendations

Direct Equivalents (Recommended for 1:1 Replacement):

PMBTA14,215 (NXP Semiconductors) and BCV27,215 (Nexperia USA Inc.) are direct electrical equivalents with 500 mA collector current matching the CMPTA14 TR PBFREE specification. Both parts are AEC-Q101 qualified automotive-grade devices with RoHS3 compliance and MSL 1 rating. PMBTA14,215 maintains identical Vce saturation and hFE characteristics. BCV27,215 offers improved Vce saturation (1V vs. 1.5V) and higher transition frequency (220 MHz vs. 125 MHz). Both are available in TO-236AB package configuration.

Higher Current Alternative:

BCV27 (onsemi) provides 1200 mA collector current capability with identical 30 V breakdown voltage and superior transition frequency (220 MHz). This part is suitable for applications requiring higher current handling while maintaining the same voltage rating and Darlington configuration. RoHS3 compliant with MSL 1 rating.

Reduced Current Substitutes (300 mA Rating):

MMBTA14-7-F (Diodes Incorporated), 2SD2142KT146 (Rohm Semiconductor), and 2SD1383KT146B (Rohm Semiconductor) are functional substitutes with 300 mA maximum collector current. These parts are suitable for applications not requiring the full 500 mA specification. MMBTA14-7-F maintains identical hFE (20000) and Vce saturation characteristics with AEC-Q101 automotive qualification. 2SD2142KT146 and 2SD1383KT146B offer alternative sourcing with RoHS3 compliance.

Lower Current Alternative:

PMBTA13,215 (Nexperia USA Inc.) provides 500 mA collector current with reduced hFE (10000 vs. 20000) and is AEC-Q101 qualified. This part is suitable for applications where lower current gain is acceptable.

All recommended substitutes maintain RoHS3 compliance, MSL 1 moisture sensitivity rating, and surface mount packaging compatibility with the original CMPTA14 TR PBFREE specification.

Frequently Asked Questions (FAQ)

Q: Can PMBTA14,215 directly replace CMPTA14 TR PBFREE in all applications?

A: Yes. PMBTA14,215 matches all critical electrical parameters: 500 mA collector current, 30 V breakdown voltage, 1.5V Vce saturation @ 100µA/100mA, and 20000 hFE @ 100mA/5V. Both are RoHS3 compliant with MSL 1 rating. The package is TO-236AB, which is mechanically compatible with SOT-23-3. AEC-Q101 automotive qualification of PMBTA14,215 provides additional reliability assurance.

Q: What is the difference between BCV27 and BCV27,215?

A: BCV27 has a maximum collector current of 1200 mA, while BCV27,215 is rated at 500 mA. Both share identical 30 V breakdown voltage and Darlington configuration. BCV27,215 is the direct equivalent to CMPTA14 TR PBFREE for 500 mA applications. BCV27 is suitable for higher current requirements while maintaining the same voltage rating.

Q: Can I use MMBTA14-7-F as a substitute if my circuit only requires 300 mA?

A: Yes. MMBTA14-7-F is rated for 300 mA maximum collector current and maintains identical Vce saturation (1.5V @ 100µA, 100mA) and hFE (20000 @ 100mA, 5V) characteristics. It is AEC-Q101 qualified and RoHS3 compliant. Use this part only in applications where the circuit current requirement does not exceed 300 mA.

Q: Are there package compatibility issues between SOT-23 and TO-236AB?

A: No. SOT-23 and TO-236AB are mechanically and electrically compatible three-lead surface mount packages. Both designations refer to the same physical package form factor with identical pin spacing and mounting requirements. Parts specified in either package designation are interchangeable from a mechanical standpoint.

Q: What is the significance of the hFE parameter in selecting a substitute?

A: DC current gain (hFE) determines the amplification factor of the transistor. The CMPTA14 TR PBFREE specifies a minimum hFE of 20000 @ 100mA, 5V. Substitutes with equal or higher hFE ensure equivalent or improved amplification performance. PMBTA13,215 has lower hFE (10000), making it suitable only for applications where reduced gain is acceptable.

Q: Why do some substitutes have different Vce saturation test conditions?

A: Vce saturation is measured at specific base current (Ib) and collector current (Ic) conditions. The CMPTA14 TR PBFREE specifies 1.5V @ 100µA, 100mA. 2SD1383KT146B specifies 1.5V @ 400µA, 200mA, indicating measurement at higher current levels. These differences reflect manufacturer test methodology but do not prevent substitution if the saturation voltage remains within acceptable circuit limits.

Q: Is AEC-Q101 qualification required for my application?

A: AEC-Q101 qualification is required only for automotive applications. PMBTA14,215, BCV27,215, and MMBTA14-7-F carry this qualification. For non-automotive applications, AEC-Q101 qualification is not a substitution requirement, though it indicates enhanced reliability testing.

Q: Can 2SD1383KT146B replace CMPTA14 TR PBFREE despite different electrical specifications?

A: 2SD1383KT146B has reduced collector current (300 mA vs. 500 mA) and lower hFE (5000 vs. 20000). It is suitable only for applications where these reduced specifications are acceptable. The 32 V breakdown voltage exceeds the 30 V requirement, providing additional voltage margin. Use this part only if circuit current and gain requirements are compatible with its specifications.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed substitutes maintain MSL 1 rating, ensuring equivalent moisture sensitivity characteristics and eliminating special storage requirements.

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