2SC4672-Q-TP Equivalent & Substitute Parts

Part Overview

The 2SC4672-Q-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-89 package. This component operates at a maximum collector current of 2 A, collector-emitter breakdown voltage of 50 V, and maximum power dissipation of 500 mW. The device features a transition frequency of 210 MHz and is rated for operating temperatures up to 150°C.

The 2SC4672-Q-TP is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	2	A
Voltage - Collector Emitter Breakdown (Max)	50	V
Vce Saturation (Max) @ Ib, Ic	350 mV @ 50 mA, 1 A	—
Current - Collector Cutoff (Max)	100 nA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 500 mA, 2 V	—
Power - Max	500	mW
Frequency - Transition	210	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 2SC4672-Q-TP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Maximum collector current (Ic) must be greater than or equal to 2 A
Maximum collector-emitter breakdown voltage (Vce(BR)CEO) must be greater than or equal to 50 V
Maximum power dissipation must be greater than or equal to 500 mW
DC current gain (hFE) characteristics must support the intended application
Transition frequency must be sufficient for the operating frequency requirements

Mechanical Compatibility Criteria:

Surface mount mounting type
TO-243AA package / case designation
Moisture sensitivity level MSL 1 (Unlimited)

Compliance Requirements:

ROHS3 compliance
EAR99 export classification

Substitute parts are grouped into two categories: Similar Substitutes (parts meeting or exceeding all electrical parameters with active product status) and Parametric Equivalents (parts with identical or near-identical electrical specifications).

Parameter Comparison

Parameter	2SC4672-Q-TP (Main)	2SC5824T100Q	2SC5994-TD-E	2SCR553PT100	2SC4672T100Q
Manufacturer	Micro Commercial Co	Rohm Semiconductor	onsemi	Rohm Semiconductor	Rohm Semiconductor
Product Status	Obsolete	Active	Active	Active	Not For New Designs
Transistor Type	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	2 A	3 A	2 A	2 A	2 A
Voltage - Collector Emitter Breakdown (Max)	50 V	60 V	50 V	50 V	50 V
Vce Saturation (Max) @ Ib, Ic	350 mV @ 50 mA, 1 A	500 mV @ 200 mA, 2 A	300 mV @ 50 mA, 1 A	350 mV @ 35 mA, 700 mA	350 mV @ 50 mA, 1 A
Current - Collector Cutoff (Max)	100 nA	1 µA	1 µA	1 µA	100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 500 mA, 2 V	120 @ 100 mA, 2 V	200 @ 100 mA, 2 V	180 @ 50 mA, 2 V	120 @ 500 mA, 2 V
Power - Max	500 mW	2 W	1.3 W	2 W	500 mW
Frequency - Transition	210 MHz	200 MHz	420 MHz	360 MHz	210 MHz
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Supplier Device Package	SOT-89	MPT3	PCP	MPT3	MPT3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	798 Pcs New Original In Stock	74300 Pcs New Original In Stock	4100 Pcs New Original In Stock	9112 Pcs New Original In Stock	60100 Pcs New Original In Stock

Engineering Selection Recommendations

For Active Production Applications:

The 2SC5994-TD-E (onsemi) is the primary recommended substitute for the obsolete 2SC4672-Q-TP. This part maintains identical maximum collector current (2 A) and collector-emitter breakdown voltage (50 V) specifications. The 2SC5994-TD-E features improved performance characteristics including lower Vce saturation (300 mV versus 350 mV), higher DC current gain (200 versus 120), and significantly higher transition frequency (420 MHz versus 210 MHz). The part carries active product status and ROHS3 compliance. Inventory availability is 4100 units.

The 2SCR553PT100 (Rohm Semiconductor) provides an alternative substitute with identical voltage and current ratings. This part offers enhanced power dissipation capability (2 W versus 500 mW) and higher transition frequency (360 MHz). The part is actively produced and maintains ROHS3 compliance with REACH unaffected status. Inventory availability is 9112 units.

For Legacy System Maintenance:

The 2SC4672T100Q (Rohm Semiconductor) is a parametric equivalent offering identical electrical specifications to the main part, including matching Vce saturation, DC current gain, and transition frequency. This part is classified as "Not For New Designs" but provides direct functional equivalence. Inventory availability is 60100 units, providing substantial supply continuity.

For Applications Requiring Enhanced Specifications:

The 2SC5824T100Q (Rohm Semiconductor) exceeds the main part specifications with higher maximum collector current (3 A), higher collector-emitter breakdown voltage (60 V), and significantly higher power dissipation (2 W). This part is suitable for applications requiring design margin or future performance headroom. The part carries active product status and ROHS3 compliance. Inventory availability is 74300 units.

All substitute parts maintain TO-243AA package compatibility, surface mount mounting type, MSL 1 moisture sensitivity rating, and ROHS3 compliance with EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the 2SC5824T100Q be used as a direct replacement for the 2SC4672-Q-TP?

A: The 2SC5824T100Q is electrically compatible as a substitute. It meets or exceeds all critical electrical parameters: collector current (3 A ≥ 2 A), collector-emitter breakdown voltage (60 V ≥ 50 V), and power dissipation (2 W ≥ 500 mW). Both parts use the TO-243AA package and are ROHS3 compliant. The 2SC5824T100Q provides enhanced performance margins with higher current capacity and voltage rating.

Q: What is the difference between the 2SC5994-TD-E and 2SCR553PT100?

A: Both parts are active substitutes with identical maximum ratings (2 A, 50 V). The 2SC5994-TD-E features lower Vce saturation (300 mV versus 350 mV) and higher transition frequency (420 MHz versus 360 MHz), making it suitable for higher-frequency applications. The 2SCR553PT100 offers higher power dissipation capability (2 W versus 1.3 W). Selection depends on specific application frequency and thermal requirements.

Q: Why is the 2SC4672T100Q marked "Not For New Designs"?

A: The 2SC4672T100Q is a legacy part from Rohm Semiconductor with identical specifications to the obsolete 2SC4672-Q-TP. While it provides direct functional equivalence and substantial inventory availability (60100 units), its "Not For New Designs" status indicates that Rohm Semiconductor recommends active alternatives for new applications. It remains suitable for legacy system maintenance and repair.

Q: Are all substitute parts available in the same package?

A: All substitute parts use the TO-243AA package designation. However, supplier device packages differ: the main part uses SOT-89, while substitutes use MPT3 or PCP designations. These are equivalent physical packages suitable for the same PCB footprints. Verify PCB layout compatibility with your specific board design.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed maintain ROHS3 compliance and carry EAR99 export classification. The 2SC5994-TD-E, 2SCR553PT100, and 2SC4672T100Q additionally carry REACH Unaffected status. All parts feature MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture handling requirements.

Q: Which substitute part offers the best performance upgrade?

A: The 2SC5994-TD-E provides the most significant performance enhancement with transition frequency of 420 MHz (double the main part) and improved Vce saturation characteristics. For applications requiring higher current capacity and thermal headroom, the 2SC5824T100Q offers 3 A maximum collector current and 2 W power dissipation. Selection depends on specific application requirements.

Q: Can I use the 2SC5824T100Q in a circuit designed for the 2SC4672-Q-TP without modifications?

A: The 2SC5824T100Q is electrically compatible and can be used as a direct substitute without circuit modifications. The higher ratings (3 A, 60 V, 2 W) provide design margin and will not cause circuit malfunction. Verify that the higher DC current gain (120 @ 100 mA, 2 V) does not affect bias point calculations in your specific circuit topology.

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