2SA2012-TD-E PNP Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The 2SA2012-TD-E is a PNP bipolar junction transistor manufactured by onsemi, rated for 30V collector-emitter breakdown voltage and 5A maximum collector current. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. The device is housed in a TO-243AA package (PCP supplier designation) and operates at a maximum junction temperature of 150°C with a transition frequency of 420MHz.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	5	A
Collector-Emitter Breakdown Voltage (Max)	30	V
Power Dissipation (Max)	3.5	W
Transition Frequency	420	MHz
DC Current Gain (hFE Min)	200	@ 500mA, 2V
Operating Temperature (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2SA2012-TD-E is determined by the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type must be PNP
Collector current rating must equal or exceed 5A
Collector-emitter breakdown voltage must equal or exceed 30V
Maximum junction temperature must be 150°C or higher
Mounting type must be surface mount
Package must be compatible with TO-243AA footprint or equivalent land pattern

Secondary Compatibility Factors:

DC current gain (hFE) minimum of 200 or greater at specified test conditions
Power dissipation capability of 3.5W or greater
Transition frequency of 420MHz or greater (for high-frequency applications)
Vce saturation characteristics suitable for switching applications

Substitute parts are grouped into two categories: manufacturer-recommended direct replacements and similar parts meeting the core electrical specifications. The 2SA2012-TD-E is obsolete; therefore, active alternatives are required for production continuity.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce(br) [V]	Power [W]	fT [MHz]	hFE (Min)	Package	Status
2SA2012-TD-E	onsemi	5	30	3.5	420	200	TO-243AA (PCP)	Obsolete
2SA2016-TD-E	onsemi	7	50	3.5	330	200	TO-243AA (PCP)	Active
2SAR542PT100	Rohm Semiconductor	5	30	2	240	200	TO-243AA (MPT3)	Active
ZXTP2008ZTA	Diodes Incorporated	5.5	30	2.1	110	100	TO-243AA (SOT-89-3)	Active
PBSS303PX,115	Nexperia USA Inc.	5.1	30	2.1	130	200	TO-243AA (SOT-89)	Active
ZX5T3ZTA	Diodes Incorporated	5.5	40	2.1	152	200	TO-243AA (SOT-89-3)	Active
ZXTP2008GTA	Diodes Incorporated	5.5	30	3	110	100	TO-261-4 / TO-261AA (SOT-223-3)	Active
FZT949TA	Diodes Incorporated	5.5	30	3	100	100	TO-261-4 / TO-261AA (SOT-223-3)	Active
DSS5540X-13	Diodes Incorporated	4	40	0.9	60	150	TO-243AA (SOT-89-3)	Active
2DB1132R-13	Diodes Incorporated	1	32	1	190	180	TO-243AA (SOT-89-3)	Active
ZX5T3ZTC	Diodes Incorporated	5.5	40	2.1	152	200	TO-243AA (SOT-89-3)	Active

Engineering Selection Recommendations

Direct Replacement (Manufacturer-Recommended):

The 2SA2016-TD-E from onsemi is the manufacturer-recommended successor to the 2SA2012-TD-E. This part exceeds the original specifications with higher collector current (7A vs. 5A) and collector-emitter breakdown voltage (50V vs. 30V), while maintaining identical power dissipation (3.5W) and the same TO-243AA package footprint. The 2SA2016-TD-E is active and ROHS3 compliant, making it the preferred choice for direct substitution in new designs and production continuity.

Equivalent Alternatives (Matching Core Specifications):

The 2SAR542PT100 from Rohm Semiconductor provides an exact electrical match for the 2SA2012-TD-E with identical collector current (5A) and collector-emitter breakdown voltage (30V) ratings. This part is active, ROHS3 compliant, and housed in a TO-243AA package (MPT3 supplier designation). The 2SAR542PT100 is suitable for applications where the original specifications must be maintained precisely.

The PBSS303PX,115 from Nexperia USA Inc. meets or exceeds all core electrical parameters with 5.1A collector current, 30V breakdown voltage, and a minimum DC current gain of 200. This part carries AEC-Q100 automotive qualification and is ROHS3 compliant, making it suitable for automotive and industrial applications requiring enhanced reliability.

Higher Voltage Alternatives:

The ZX5T3ZTA and ZX5T3ZTC from Diodes Incorporated both provide 5.5A collector current with elevated 40V breakdown voltage, offering additional design margin for applications subject to voltage transients. Both parts are active and ROHS3 compliant.

Larger Package Alternatives (SOT-223-3):

The ZXTP2008GTA and FZT949TA from Diodes Incorporated offer the same 30V/5.5A electrical specifications in the larger SOT-223-3 package (TO-261-4 / TO-261AA footprint). These parts provide 3W power dissipation and are suitable for applications where thermal management or board layout requires a larger package footprint.

Lower Current Alternative:

The 2DB1132R-13 from Diodes Incorporated is suitable only for applications requiring reduced collector current (1A maximum). This part is not recommended as a general substitute for the 2SA2012-TD-E due to insufficient current rating.

Lower Power Alternative:

The DSS5540X-13 from Diodes Incorporated provides 4A collector current with 40V breakdown voltage but reduced power dissipation (0.9W). This part is suitable only for low-power applications and is not recommended for designs requiring the full 3.5W power capability of the original device.

All recommended substitute parts are active, ROHS3 compliant, and REACH unaffected, ensuring compliance with current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2SA2016-TD-E directly replace the 2SA2012-TD-E without circuit modifications?

A: Yes. The 2SA2016-TD-E is the manufacturer-recommended successor and maintains the same TO-243AA package footprint and pinout. The higher voltage and current ratings provide additional design margin without requiring circuit changes. Verify that the application does not depend on the specific transition frequency (330MHz vs. 420MHz).

Q: What is the difference between the PCP and MPT3 package designations?

A: PCP and MPT3 are supplier-specific package designations for the same TO-243AA physical package. Both designations refer to identical land patterns and mechanical dimensions. Parts with these designations are mechanically and electrically interchangeable.

Q: Why do some substitute parts have lower power dissipation ratings than the 2SA2012-TD-E?

A: The DSS5540X-13 (0.9W) and 2DB1132R-13 (1W) are not suitable general replacements for the 2SA2012-TD-E (3.5W). These parts are included in the substitute list only for applications with reduced power requirements. For designs requiring the full 3.5W capability, select alternatives with matching or higher power ratings.

Q: Are SOT-223-3 package parts (ZXTP2008GTA, FZT949TA) compatible with TO-243AA footprints?

A: No. SOT-223-3 parts use the TO-261-4 / TO-261AA footprint, which differs from the TO-243AA footprint of the original device. These parts require PCB layout modifications and are suitable only for new designs where the larger package can be accommodated.

Q: What is the significance of the AEC-Q100 qualification on the PBSS303PX,115?

A: AEC-Q100 qualification indicates that the PBSS303PX,115 meets automotive industry reliability and quality standards. This part is suitable for automotive applications and environments requiring enhanced component qualification. Non-qualified parts may not meet automotive procurement requirements.

Q: Can the 2DB1132R-13 be used in applications originally designed for the 2SA2012-TD-E?

A: No. The 2DB1132R-13 is rated for only 1A maximum collector current, compared to the 2SA2012-TD-E rating of 5A. This part is insufficient for applications requiring the full current capability of the original device and will result in component failure or circuit malfunction.

Q: Which substitute part provides the closest electrical match to the 2SA2012-TD-E?

A: The 2SAR542PT100 from Rohm Semiconductor provides an exact match for collector current (5A) and collector-emitter breakdown voltage (30V). The PBSS303PX,115 from Nexperia USA Inc. provides a near-exact match with 5.1A collector current and identical 30V breakdown voltage, with the additional benefit of AEC-Q100 automotive qualification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component procurement.

Q: What is the impact of transition frequency differences between substitute parts?

A: The 2SA2012-TD-E has a transition frequency of 420MHz, while some substitutes (such as ZXTP2008ZTA at 110MHz) have significantly lower transition frequencies. For high-frequency switching applications, select substitutes with transition frequencies of 240MHz or higher to maintain circuit performance. For low-frequency applications, transition frequency is not a limiting factor.

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