Equivalent & Substitute Parts for 2DA1774R-7-F

Part Overview

The 2DA1774R-7-F is an active PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-523 package. This component operates at a maximum collector current of 150 mA with a 50 V collector-emitter breakdown voltage and 150 mW power dissipation capability. The transistor is specified for operating temperatures from -55°C to 150°C and features a transition frequency of 140 MHz.

Substitute parts become necessary when the original component experiences supply constraints, extended lead times, or when design requirements permit alternative packaging formats or thermal specifications. The parts listed below maintain electrical compatibility within the defined parameter ranges while offering different package options or manufacturing sources.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	150	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 5 mA, 50 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	180 @ 1 mA, 6 V	—
Power - Max	150	mW
Frequency - Transition	140	MHz
Operating Temperature (TJ)	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-523	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the 2DA1774R-7-F is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Transistor type must be PNP
Maximum collector current (Ic) must be ≥ 150 mA
Collector-emitter breakdown voltage (VCEO) must be ≥ 50 V
Vce saturation must not exceed 500 mV @ 5 mA, 50 mA
DC current gain (hFE) minimum must be ≥ 180 @ 1 mA, 6 V
Transition frequency must be ≥ 140 MHz
Maximum power dissipation must be ≥ 150 mW
Operating temperature range must include 150°C maximum

Mechanical Compatibility Criteria:

Surface mount mounting type
Package format compatibility with PCB layout constraints

Compliance Requirements:

RoHS3 compliance
MSL rating of 1 (Unlimited)

Substitute parts are classified into two categories: MFR Recommended substitutes, which are manufacturer-endorsed alternatives, and Parametric Equivalent substitutes, which meet all electrical specifications but may differ in packaging or thermal characteristics.

Parameter Comparison

Parameter	2DA1774R-7-F (Diodes)	2PA1576R,115 (Nexperia)	2SA1774T1G (onsemi)	2SA2029FHAT2LR (Rohm)	2SA2029T2LR (Rohm)
Manufacturer	Diodes Incorporated	Nexperia USA Inc.	onsemi	Rohm Semiconductor	Rohm Semiconductor
Transistor Type	PNP	PNP	PNP	PNP	PNP
Current - Collector (Ic) (Max)	150 mA	150 mA	100 mA	150 mA	150 mA
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	50 V	50 V	50 V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA
Current - Collector Cutoff (Max)	100 nA	100 nA	500 nA	100 nA	100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	180 @ 1 mA, 6 V	180 @ 1 mA, 6 V	120 @ 1 mA, 6 V	180 @ 1 mA, 6 V	180 @ 1 mA, 6 V
Power - Max	150 mW	200 mW	150 mW	150 mW	150 mW
Frequency - Transition	140 MHz	100 MHz	140 MHz	140 MHz	140 MHz
Operating Temperature (TJ)	-55 to 150 °C	150 °C	150 °C	150 °C	150 °C
Package / Case	SOT-523	SOT-323	SC-75, SOT-416	SOT-723	SOT-723
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)
Product Status	Active	Active	Active	Active	Active
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

2PA1576R,115 (Nexperia USA Inc.) - MFR Recommended

This substitute is designated as manufacturer-recommended and maintains full electrical compatibility with the 2DA1774R-7-F. The 2PA1576R,115 meets all critical parameters including 150 mA maximum collector current, 50 V breakdown voltage, and 180 minimum DC current gain. The package format differs (SOT-323 versus SOT-523), requiring PCB layout verification. This part carries AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade components. Power dissipation capability is increased to 200 mW, providing additional thermal margin.

2SA1774T1G (onsemi) - MFR Recommended

This substitute is designated as manufacturer-recommended and shares the same base product number (2SA1774) as the original part. The 2SA1774T1G maintains the 140 MHz transition frequency and 150 mW power rating. The maximum collector current is specified at 100 mA, which is lower than the original 150 mA specification. The DC current gain minimum is 120, below the original 180 specification. The package format is SC-75 (SOT-416), differing from the SOT-523 original. This part is suitable for applications where the reduced current rating does not present a constraint.

2SA2029FHAT2LR (Rohm Semiconductor) - Parametric Equivalent

This substitute is classified as a parametric equivalent and provides complete electrical compatibility with the 2DA1774R-7-F. All critical parameters match: 150 mA collector current, 50 V breakdown voltage, 180 minimum DC current gain, and 140 MHz transition frequency. The part carries AEC-Q101 automotive qualification. The package format is SOT-723 (VMT3), which is smaller than the original SOT-523. Packaging format is Tape & Reel (TR). This part is suitable for space-constrained applications requiring automotive qualification.

2SA2029T2LR (Rohm Semiconductor) - Parametric Equivalent

This substitute is classified as a parametric equivalent and provides complete electrical compatibility with the 2DA1774R-7-F. All critical parameters match: 150 mA collector current, 50 V breakdown voltage, 180 minimum DC current gain, and 140 MHz transition frequency. The package format is SOT-723 (VMT3), identical to the 2SA2029FHAT2LR. The primary distinction is the packaging format: Cut Tape (CT) & Digi-Reel® versus Tape & Reel (TR). This part is suitable for applications where cut tape or Digi-Reel® packaging is preferred for assembly processes.

All substitute parts maintain RoHS3 compliance and MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: What are the primary differences between the substitute parts?

A: The substitute parts differ in three primary aspects: package format (SOT-323, SC-75, or SOT-723 versus the original SOT-523), maximum collector current rating (100 mA or 150 mA), and packaging delivery format (Tape & Reel or Cut Tape & Digi-Reel®). All parts maintain the same 50 V breakdown voltage and 140 MHz transition frequency specifications, with the exception of the 2PA1576R,115, which operates at 100 MHz.

Q: Can the 2SA1774T1G be used as a direct replacement for the 2DA1774R-7-F?

A: The 2SA1774T1G meets most electrical specifications but has a reduced maximum collector current of 100 mA compared to the original 150 mA, and a lower DC current gain minimum of 120 versus 180. The package format also differs (SC-75 versus SOT-523). This part is suitable only for applications where the reduced current rating does not exceed design requirements.

Q: What is the difference between the two Rohm 2SA2029 variants?

A: The 2SA2029FHAT2LR and 2SA2029T2LR are electrically identical, both providing complete parametric equivalence to the 2DA1774R-7-F. The distinction lies in packaging delivery format: the FHAT2LR variant is supplied in Tape & Reel (TR) format, while the T2LR variant is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed are RoHS3 compliant and carry MSL rating of 1 (Unlimited), matching the compliance profile of the original 2DA1774R-7-F.

Q: Which substitute part is recommended for automotive applications?

A: Both the 2PA1576R,115 and 2SA2029FHAT2LR carry AEC-Q101 automotive qualification. The 2PA1576R,115 is designated as manufacturer-recommended and offers increased power dissipation (200 mW). The 2SA2029FHAT2LR provides a smaller package footprint (SOT-723) while maintaining full electrical compatibility.

Q: What PCB layout considerations apply when substituting package formats?

A: Package format substitution requires verification of PCB footprint compatibility. The original SOT-523 package differs in pin spacing and dimensions from SOT-323 (2PA1576R,115), SC-75 (2SA1774T1G), and SOT-723 (2SA2029 variants). PCB layout modifications may be necessary to accommodate alternative package formats.

Q: Can the 2PA1576R,115 be used in all applications where the 2DA1774R-7-F is specified?

A: The 2PA1576R,115 maintains electrical compatibility with all critical parameters and is manufacturer-recommended. However, the transition frequency is specified at 100 MHz compared to the original 140 MHz, and the package format differs. Applications requiring the full 140 MHz transition frequency specification should use alternative substitutes such as the 2SA1774T1G or 2SA2029 variants.

Q: What is the inventory status of the substitute parts?

A: The 2SA2029T2LR has the highest inventory availability at 120,300 pieces. The 2SA2029FHAT2LR has 21,850 pieces available. The 2PA1576R,115 has 6,400 pieces available. The 2SA1774T1G has 2,780 pieces available. All parts are listed as active products with new original stock.

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