Equivalent & Substitute Parts for 2SD874A-Q-TP

Part Overview

The 2SD874A-Q-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 1 A, collector-emitter breakdown voltage of 50 V, and a power dissipation rating of 500 mW in a surface mount SOT-89 package. The 2SD874A-Q-TP is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	50	V
Power - Max	500	mW
Frequency - Transition	200	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	TO-243AA (SOT-89)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2SD874A-Q-TP is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Transistor type must be NPN
Maximum collector current (Ic) must be ≥ 1 A
Collector-emitter breakdown voltage (VCEO) must be ≥ 50 V
Maximum power dissipation must be ≥ 500 mW
Package type must be TO-243AA or compatible surface mount equivalent
Mounting type must be surface mount
Operating temperature range must encompass the application requirements

Secondary Compatibility Factors:

Transition frequency (fT) should support the intended switching or amplification frequency
DC current gain (hFE) characteristics should be suitable for the circuit design
Saturation voltage characteristics should be compatible with circuit performance requirements

The substitute parts listed below meet or exceed these criteria and are available from active manufacturers with current production status.

Parameter Comparison

Parameter	2SD874A-Q-TP (Main)	2SCR513P5T100	BCX55-10,115	FCX491ATA
Manufacturer	Micro Commercial Co	Rohm Semiconductor	NXP Semiconductors	Diodes Incorporated
Transistor Type	NPN	NPN	NPN	NPN
Current - Collector (Ic) Max	1 A	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	60 V	40 V
Power - Max	500 mW	500 mW	1.25 W	1 W
Frequency - Transition	200 MHz	360 MHz	180 MHz	150 MHz
Operating Temperature (Max)	150°C	150°C	150°C	150°C
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

2SCR513P5T100 (Rohm Semiconductor)

The 2SCR513P5T100 is a direct functional equivalent with identical maximum collector current (1 A) and collector-emitter breakdown voltage (50 V). This part maintains the same power rating (500 mW) and package configuration (TO-243AA). The 2SCR513P5T100 offers superior transition frequency (360 MHz versus 200 MHz) and improved DC current gain characteristics (180 @ 50mA, 2V). Product status is active with high inventory availability (3300 pcs). ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) are maintained. This substitute is recommended for direct replacement in applications where the enhanced frequency response provides design margin.

BCX55-10,115 (NXP Semiconductors)

The BCX55-10,115 exceeds the primary substitution criteria with a higher collector-emitter breakdown voltage (60 V versus 50 V) and increased power dissipation capability (1.25 W versus 500 mW). Maximum collector current remains at 1 A with identical package type (TO-243AA). Transition frequency is slightly lower (180 MHz versus 200 MHz). Product status is active with substantial inventory (63200 pcs). ROHS3 compliance and MSL 1 rating are maintained. This substitute is suitable for applications requiring enhanced voltage margin or thermal headroom.

FCX491ATA (Diodes Incorporated)

The FCX491ATA operates at a lower collector-emitter breakdown voltage (40 V versus 50 V) and is therefore suitable only for applications where the circuit voltage does not exceed 40 V. Maximum collector current and package type remain compatible (1 A, TO-243AA). Power dissipation is increased to 1 W, and transition frequency is lower (150 MHz). Product status is active with high inventory (19556 pcs). ROHS3 compliance and MSL 1 rating are maintained. This substitute is applicable only when circuit voltage requirements are confirmed below 40 V.

Frequently Asked Questions (FAQ)

Q: Can the 2SCR513P5T100 be used as a direct replacement for the 2SD874A-Q-TP?

A: Yes. The 2SCR513P5T100 meets all primary substitution criteria with identical maximum collector current (1 A), collector-emitter breakdown voltage (50 V), power rating (500 mW), and package type (TO-243AA). The higher transition frequency (360 MHz) provides additional design margin without compromising compatibility.

Q: What is the key difference between the BCX55-10,115 and the 2SD874A-Q-TP?

A: The BCX55-10,115 has a higher collector-emitter breakdown voltage (60 V versus 50 V) and greater power dissipation capability (1.25 W versus 500 mW). Both devices share identical maximum collector current (1 A) and package configuration (TO-243AA). The BCX55-10,115 is suitable for applications requiring enhanced voltage or thermal performance.

Q: Why is the FCX491ATA listed as a substitute if it has a lower breakdown voltage?

A: The FCX491ATA is listed as a substitute for applications where the circuit voltage does not exceed 40 V. It maintains compatibility in collector current (1 A), package type (TO-243AA), and mounting configuration. Selection of this part requires confirmation that circuit voltage requirements are below 40 V.

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

A: Yes. All substitute parts (2SCR513P5T100, BCX55-10,115, and FCX491ATA) are available in the TO-243AA package with surface mount configuration, ensuring mechanical and electrical compatibility with existing PCB designs.

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

A: Transition frequency (fT) indicates the maximum frequency at which the transistor can operate effectively. The 2SD874A-Q-TP operates at 200 MHz. The 2SCR513P5T100 (360 MHz) and BCX55-10,115 (180 MHz) offer different frequency performance. Selection should be based on the specific switching or amplification frequency requirements of the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (2SCR513P5T100, BCX55-10,115, and FCX491ATA) are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the compliance profile of the 2SD874A-Q-TP.

Q: What is the primary reason for finding a substitute for the 2SD874A-Q-TP?

A: The 2SD874A-Q-TP is classified as obsolete. Substitute parts are necessary to ensure production continuity, component availability, and long-term design support. All listed substitutes are manufactured by active suppliers with current production status.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message