2SD12670P Equivalent & Substitute Parts

Part Overview

The 2SD12670P is an NPN bipolar junction transistor manufactured by Panasonic Electronic Components, rated for 60V collector-emitter breakdown voltage and 4A maximum collector current. This device is packaged in TO-220-3 through-hole configuration and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. The 2SD12670P operates at a maximum junction temperature of 150°C with a maximum power dissipation of 2W and transition frequency of 20MHz.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	4	A
Vce Saturation (Max)	1.5	V @ 400mA, 4A
Current - Collector Cutoff (Max)	700	µA
DC Current Gain (hFE) (Min)	120	@ 1A, 4V
Power - Max	2	W
Frequency - Transition	20	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—

Substitute Part Grouping Explanation

Substitution of the 2SD12670P is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (mandatory match)
Voltage - Collector Emitter Breakdown (Max): 60V or greater
Current - Collector (Ic) (Max): 4A or greater
Package / Case: TO-220-3 (mandatory match for mechanical compatibility)
Mounting Type: Through Hole (mandatory match)

Secondary Compatibility Parameters:

Vce Saturation characteristics
DC Current Gain (hFE)
Operating Temperature range
Power dissipation capability

Substitute parts are grouped into three categories based on their electrical characteristics relative to the 2SD12670P:

Group 1 - Direct Equivalents (Ic ≥ 4A, Vce(br) = 60V): Parts with collector current ratings at or above 4A and matching 60V breakdown voltage. These provide direct functional replacement with equal or superior current handling.

Group 2 - Higher Current Capability (Ic > 4A, Vce(br) ≥ 60V): Parts exceeding the 4A collector current specification while maintaining or exceeding the 60V voltage rating. These provide enhanced current capacity for applications requiring headroom.

Group 3 - Reduced Current Capability (Ic < 4A, Vce(br) = 60V): Parts with collector current ratings below 4A. These are suitable only for applications where the actual operating current is confirmed to be below the substitute part's rating.

All substitute parts maintain TO-220-3 through-hole packaging and are from active manufacturers with current product status or last-time-buy availability.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce(br) (Max) [V]	Vce Sat (Max) [V]	hFE (Min)	Power (Max) [W]	Freq - Transition [MHz]	Temp (TJ) [°C]	Status
2SD12670P	Panasonic	4	60	1.5	120	2	20	150	Obsolete
2ST31A	STMicroelectronics	3	60	1.2	100	40	—	150	Active
TIP31A	Solid State Inc.	3	60	1.2	25	40	3	-65 to 150	Active
TIP29AG	onsemi	1	60	0.7	15	2	3	-65 to 150	Active
TIP41AG	onsemi	6	60	1.5	15	2	3	-65 to 150	Last Time Buy
D44H8	STMicroelectronics	10	60	1	40	50	—	150	Active
MJE3055T	NTE Electronics, Inc	10	60	8	20	75	2	-55 to 150	Active
MJE3055TG	onsemi	10	60	8	20	75	2	-55 to 150	Active
2N6292G	onsemi	7	70	3.5	30	40	4	-65 to 150	Active
2N6487G	onsemi	15	60	3.5	20	1.8	5	-65 to 150	Active

Engineering Selection Recommendations

For Direct Replacement (Minimum Disruption):

The 2ST31A from STMicroelectronics is the closest functional equivalent. While rated for 3A maximum collector current (below the 2SD12670P's 4A), it matches the 60V breakdown voltage, operates at the same maximum junction temperature (150°C), and provides superior power dissipation (40W vs. 2W). The 2ST31A is ROHS3 compliant and carries active product status. Selection of this part is appropriate when actual circuit operating current is confirmed to be 3A or below.

For Enhanced Current Capacity:

The D44H8 from STMicroelectronics provides 10A collector current capability at 60V breakdown voltage with 50W power dissipation. This part is ROHS3 compliant with active status and offers significant headroom above the 2SD12670P specification. The D44H8 is suitable for applications requiring current margin or future design scaling.

The TIP41AG from onsemi provides 6A collector current at 60V with active status, though it carries last-time-buy designation. This part offers moderate current enhancement with extended operating temperature range (-65°C to 150°C).

For Higher Voltage Applications:

The 2N6292G from onsemi provides 70V breakdown voltage with 7A collector current, offering both voltage and current margin. This part is ROHS3 compliant with active status and extended temperature range.

For Reduced Current Applications:

The TIP31A from Solid State Inc. is rated for 3A at 60V with 40W power dissipation and active status. The TIP29AG from onsemi is rated for 1A at 60V and is suitable only for low-current applications.

Compliance Considerations:

All recommended active substitutes carry ROHS3 compliance. The 2ST31A, D44H8, and TIP41AG maintain the MSL 1 (Unlimited) moisture sensitivity level of the original part. The onsemi parts (2N6292G, 2N6487G, MJE3055TG, TIP41AG, TIP29AG) carry REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the 2ST31A replace the 2SD12670P in all applications?

A: The 2ST31A is suitable for replacement when the actual circuit operating collector current does not exceed 3A. The 2SD12670P is rated for 4A maximum, so applications operating at or above 3.5A require a higher-current substitute such as the D44H8 or TIP41AG.

Q: What is the primary difference between the D44H8 and MJE3055T?

A: Both parts are rated for 10A collector current at 60V. The D44H8 has lower Vce saturation (1V @ 400mA, 8A) compared to the MJE3055T (8V @ 3.3A, 10A), making the D44H8 more efficient in saturation mode. The MJE3055T offers higher power dissipation (75W vs. 50W) and extended temperature range (-55°C to 150°C).

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All substitute parts listed are packaged in TO-220-3 through-hole configuration, ensuring mechanical compatibility with the original 2SD12670P footprint and mounting requirements.

Q: What does "Last Time Buy" status mean for the TIP41AG?

A: Last Time Buy indicates that the manufacturer has announced end-of-life for this part. Existing inventory may be available, but no new production is planned. For new designs, the D44H8 or 2ST31A are preferred alternatives with confirmed active status.

Q: How do I determine which substitute is appropriate for my application?

A: Identify the maximum collector current required by your circuit. If ≤3A, the 2ST31A is suitable. If 3A to 4A, use the TIP41AG (6A rating). If >4A, use the D44H8 (10A) or 2N6487G (15A). Verify that the substitute part's voltage rating meets or exceeds 60V and that the package remains TO-220-3.

Q: Is the 2N6487G suitable as a substitute despite its lower power rating (1.8W)?

A: The 2N6487G power rating of 1.8W is lower than the 2SD12670P (2W), but this specification reflects thermal design characteristics rather than absolute capability. The 2N6487G is rated for 15A collector current, indicating robust current handling. Selection depends on the actual power dissipation in your circuit, not the rated maximum.

Q: What is the significance of DC Current Gain (hFE) differences between parts?

A: The hFE parameter affects base drive requirements. The 2SD12670P has hFE of 120 @ 1A, 4V, while substitutes range from 15 to 100. Lower hFE requires higher base current for saturation. Verify that your circuit's base drive circuit can supply the required base current for the selected substitute part.

Q: Are there RoHS compliance differences between substitutes?

A: All active substitute parts listed carry ROHS3 compliance. The original 2SD12670P does not specify RoHS status due to its obsolete classification. All substitutes meet current environmental compliance requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message