2SD874-R-TP Equivalent & Substitute Parts

Part Overview

The 2SD874-R-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 1 A and collector-emitter breakdown voltage of 25 V, with a maximum power dissipation of 500 mW and transition frequency of 200 MHz. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance where original components are no longer readily available or have been discontinued by the manufacturer.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	25	V
Vce Saturation (Max)	400 mV @ 50 mA, 500 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min	120 @ 500 mA, 10 V	—
Power - Max	500	mW
Frequency - Transition	200	MHz
Operating Temperature	-55 to 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 2SD874-R-TP is determined by strict electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Collector current rating must be equal to or greater than 1 A
Collector-emitter breakdown voltage must be equal to or greater than 25 V
DC current gain (hFE) must meet or exceed 120 at specified operating conditions
Vce saturation characteristics must be compatible with circuit requirements
Transition frequency must support the intended switching or amplification application

Mechanical Compatibility Criteria:

Package type must be TO-243AA (SOT-89 family)
Surface mount configuration required
Operating temperature range must encompass -55°C to 150°C

Compliance Requirements:

RoHS3 compliance mandatory
Moisture sensitivity level of 1 (Unlimited) acceptable

The substitute parts listed below meet all electrical parameters equal to or exceeding the 2SD874-R-TP specifications while maintaining mechanical and environmental compliance.

Parameter Comparison

Parameter	2SD874-R-TP (Main)	2DD1664Q-13	BCX6816H6327XTSA1
Manufacturer	Micro Commercial Co	Diodes Incorporated	Infineon Technologies
Transistor Type	NPN	NPN	NPN
Current - Collector (Ic) Max	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	25 V	32 V	20 V
Vce Saturation (Max)	400 mV @ 50 mA, 500 mA	400 mV @ 50 mA, 500 mA	500 mV @ 100 mA, 1 A
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA
DC Current Gain (hFE) Min	120 @ 500 mA, 10 V	120 @ 100 mA, 3 V	100 @ 500 mA, 1 V
Power - Max	500 mW	1 W	3 W
Frequency - Transition	200 MHz	280 MHz	100 MHz
Operating Temperature	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
Package / Case	TO-243AA	TO-243AA	TO-243AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

2DD1664Q-13 (Diodes Incorporated)

The 2DD1664Q-13 is the primary substitute for the 2SD874-R-TP. This part maintains electrical equivalence across all critical parameters while offering enhanced specifications. The collector-emitter breakdown voltage is rated at 32 V, exceeding the 25 V requirement of the original part. Maximum power dissipation is increased to 1 W compared to 500 mW, providing additional thermal margin. Transition frequency is 280 MHz, supporting higher-speed applications. The part is classified as active product status, ensuring long-term availability and supply chain continuity. RoHS3 compliance and MSL 1 rating match the original specification. This substitute is suitable for direct replacement in existing designs.

BCX6816H6327XTSA1 (Infineon Technologies)

The BCX6816H6327XTSA1 is an alternative substitute with specific application constraints. The collector-emitter breakdown voltage is 20 V, which is below the 25 V specification of the original part and therefore not suitable for circuits requiring the full 25 V rating. However, this part offers significantly higher power dissipation at 3 W and includes automotive-grade qualification (AEC-Q101). The DC current gain minimum is 100, which is below the 120 specification of the original part. This substitute is classified as obsolete. The BCX6816H6327XTSA1 is applicable only in applications where the reduced voltage rating and lower gain are acceptable, and where automotive qualification is required.

Frequently Asked Questions (FAQ)

Q: Can the 2DD1664Q-13 be used as a direct replacement for the 2SD874-R-TP?

A: Yes. The 2DD1664Q-13 meets or exceeds all electrical parameters of the 2SD874-R-TP, including collector current (1 A), collector-emitter breakdown voltage (32 V vs. 25 V), DC current gain (120 minimum), and operating temperature range (-55°C to 150°C). Both parts use the TO-243AA package for surface mount applications. The 2DD1664Q-13 is active product status, providing superior long-term availability.

Q: Why is the BCX6816H6327XTSA1 not recommended as a primary substitute?

A: The BCX6816H6327XTSA1 has a collector-emitter breakdown voltage of 20 V, which is below the 25 V maximum rating of the 2SD874-R-TP. Additionally, the DC current gain minimum is 100, below the 120 specification of the original part. This part is classified as obsolete. The BCX6816H6327XTSA1 is suitable only for applications where the reduced voltage and gain specifications are acceptable.

Q: Are all substitute parts in the same package?

A: Yes. The 2SD874-R-TP, 2DD1664Q-13, and BCX6816H6327XTSA1 all use the TO-243AA package (SOT-89 family) for surface mount applications. Pin configuration and footprint compatibility are maintained across all three parts.

Q: What is the significance of the transition frequency difference?

A: The 2SD874-R-TP has a transition frequency of 200 MHz, the 2DD1664Q-13 has 280 MHz, and the BCX6816H6327XTSA1 has 100 MHz. Higher transition frequency indicates faster switching capability. The 2DD1664Q-13 supports higher-speed applications, while the BCX6816H6327XTSA1 is limited to lower-frequency circuits. Selection depends on the specific switching or amplification frequency requirements of the application.

Q: Are all parts RoHS3 compliant?

A: Yes. The 2SD874-R-TP, 2DD1664Q-13, and BCX6816H6327XTSA1 are all RoHS3 compliant with moisture sensitivity level 1 (Unlimited), meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the difference in power dissipation ratings?

A: The 2SD874-R-TP is rated at 500 mW maximum power dissipation. The 2DD1664Q-13 is rated at 1 W, providing twice the thermal capacity. The BCX6816H6327XTSA1 is rated at 3 W, offering significantly higher power handling. Selection should be based on the actual power dissipation requirements of the circuit and available thermal management.

Q: Can the 2DD1664Q-13 be used in applications requiring the full 25 V rating?

A: Yes. The 2DD1664Q-13 has a collector-emitter breakdown voltage of 32 V, which exceeds the 25 V requirement. This provides additional voltage margin and is suitable for all applications designed for the 2SD874-R-TP.

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