2SC4672-R-TP Equivalent & Substitute Parts

Part Overview

The 2SC4672-R-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, rated for 50V collector-emitter breakdown voltage and 2A maximum collector current. This component is designed for surface mount applications in the SOT-89 package and operates at a maximum junction temperature of 150°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	2	A
Voltage - Collector Emitter Breakdown (Max)	50	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	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 2SC4672-R-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 50V
Current - Collector (Ic) Max: 2A minimum
Package / Case: TO-243AA
Mounting Type: Surface Mount
Operating Temperature (TJ): 150°C
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Frequency - Transition: Equal to or greater than 210MHz
Power - Max: Equal to or greater than 500mW
Vce Saturation: Equal to or less than 350mV
DC Current Gain (hFE): Equal to or greater than 180
Current - Collector Cutoff (ICBO): Equal to or less than 100nA

The following parts satisfy these substitution criteria and are listed as active alternatives to the obsolete 2SC4672-R-TP.

Parameter Comparison

Parameter	2SC4672-R-TP	2SC5994-TD-E	2SCR533P5T100	2SCR553PT100	2SD1623S-TD-E	2SD1623T-TD-E
Manufacturer	Micro Commercial Co	onsemi	Rohm Semiconductor	Rohm Semiconductor	onsemi	onsemi
Product Status	Obsolete	Active	Active	Active	Active	Active
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) Max	2 A	2 A	3 A	2 A	2 A	2 A
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	50 V	50 V	50 V	50 V
Vce Saturation (Max) @ Ib, Ic	350mV @ 50mA, 1A	300mV @ 50mA, 1A	350mV @ 50mA, 1A	350mV @ 35mA, 700mA	400mV @ 50mA, 1A	400mV @ 50mA, 1A
Current - Collector Cutoff (Max)	100nA (ICBO)	1µA (ICBO)	1µA (ICBO)	1µA (ICBO)	100nA (ICBO)	100nA (ICBO)
DC Current Gain (hFE) Min @ Ic, Vce	180 @ 500mA, 2V	200 @ 100mA, 2V	180 @ 50mA, 3V	180 @ 50mA, 2V	100 @ 100mA, 2V	100 @ 100mA, 2V
Power - Max	500 mW	1.3 W	500 mW	2 W	500 mW	500 mW
Frequency - Transition	210 MHz	420 MHz	320 MHz	360 MHz	150 MHz	150 MHz
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All identified substitute parts maintain compliance with ROHS3 requirements and operate within the same thermal envelope (150°C maximum junction temperature). The following selection criteria apply based on product status and availability:

Primary Substitutes (Active Status, Full Parameter Alignment):

The 2SC5994-TD-E, 2SCR553PT100, and 2SCR533P5T100 are active products that exceed the electrical performance specifications of the obsolete 2SC4672-R-TP. These parts provide enhanced transition frequency and power dissipation capabilities while maintaining voltage and current ratings. The 2SC5994-TD-E offers the highest transition frequency at 420MHz and maximum power rating of 1.3W. The 2SCR553PT100 provides 360MHz transition frequency with 2W power capability. The 2SCR533P5T100 supports 3A maximum collector current with 320MHz transition frequency.

Secondary Substitutes (Active Status, Reduced Performance Parameters):

The 2SD1623S-TD-E and 2SD1623T-TD-E are active alternatives with identical voltage and current ratings but operate at 150MHz transition frequency, which is below the original 210MHz specification. These parts are suitable for applications where transition frequency is not a critical design parameter. Both variants maintain 500mW power dissipation and are available in different packaging formats (Tape & Reel and Cut Tape).

All substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the 2SC4672-R-TP be directly replaced with any of the listed substitutes?

A: Direct replacement is possible for all listed substitutes within the TO-243AA package footprint. All substitute parts maintain identical voltage (50V) and current (2A minimum) ratings, surface mount configuration, and thermal operating range (150°C). Pin configuration compatibility must be verified against the specific application schematic, as package designation TO-243AA indicates mechanical compatibility but does not guarantee identical pin assignment across all manufacturers.

Q: What is the significance of transition frequency differences among the substitutes?

A: Transition frequency (fT) indicates the maximum frequency at which the transistor maintains useful gain. The 2SC4672-R-TP operates at 210MHz. Substitutes with higher transition frequencies (2SC5994-TD-E at 420MHz, 2SCR553PT100 at 360MHz, 2SCR533P5T100 at 320MHz) provide enhanced high-frequency performance and are suitable for all applications requiring the original specification or lower. The 2SD1623S-TD-E and 2SD1623T-TD-E operate at 150MHz and are suitable only for applications where the design does not require frequencies above 150MHz.

Q: How do power dissipation ratings affect substitution?

A: The 2SC4672-R-TP is rated for 500mW maximum power dissipation. Substitutes with equal or higher power ratings (2SC5994-TD-E at 1.3W, 2SCR553PT100 at 2W) provide thermal margin and are universally compatible. The 2SCR533P5T100 and 2SD1623 variants maintain the 500mW rating and are suitable for applications designed within this thermal envelope.

Q: What packaging format differences exist among the substitutes?

A: All substitutes use the TO-243AA package case, ensuring mechanical compatibility. Supplier device packages vary: 2SC5994-TD-E uses PCP packaging in Tape & Reel format; 2SCR533P5T100 and 2SCR553PT100 use MPT3 packaging in Cut Tape & Digi-Reel format; 2SD1623S-TD-E uses PCP in Tape & Reel format; 2SD1623T-TD-E uses PCP in Cut Tape & Digi-Reel format. These packaging format differences affect procurement and handling but do not impact electrical performance or board-level compatibility.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the 2SC4672-R-TP. This ensures compatibility with standard manufacturing processes and regulatory requirements.

Q: What is the difference between 2SD1623S-TD-E and 2SD1623T-TD-E?

A: Both parts are electrically identical NPN transistors with 50V, 2A, 150MHz, and 500mW specifications. The primary difference is packaging format: 2SD1623S-TD-E is supplied in Tape & Reel (TR) format, while 2SD1623T-TD-E is supplied in Cut Tape (CT) & Digi-Reel format. Selection between these variants depends on procurement and assembly line requirements rather than electrical performance.

Q: Can the 2SCR533P5T100 be used in place of the 2SC4672-R-TP despite its 3A rating?

A: The 2SCR533P5T100 is a valid substitute. Its 3A maximum collector current rating exceeds the 2A requirement of the original part, providing additional current capacity without compromising compatibility. The part maintains the 50V voltage rating, 500mW power dissipation, and TO-243AA package. Applications designed for 2A operation function correctly with this higher-rated component.

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