PDTA124EU,115 Pre-Biased PNP Transistor Equivalent & Substitute Parts

Part Overview

The PDTA124EU,115 is an active pre-biased PNP bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in SOT-323 surface mount packaging. This component integrates internal base and emitter-base resistors (22 kOhms each) to provide simplified biasing in switching and amplification applications. The device operates at 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and 200 mW power dissipation. The part carries AEC-Q100 automotive qualification and ROHS3 compliance. Substitute parts are necessary when primary inventory is unavailable, when alternative packaging formats are required for design modifications, or when different internal resistor values better suit specific circuit requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Pre-Biased	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	100	mA
Power - Max	200	mW
Resistor - Base (R1)	22	kOhms
Resistor - Emitter Base (R2)	22	kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 5mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	150mV @ 500µA, 10mA	—
Current - Collector Cutoff (Max)	100	nA
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
Product Status	Active	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q100	—

Substitute Part Grouping Explanation

Substitution of the PDTA124EU,115 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Transistor type must be PNP pre-biased
Voltage rating (Vce breakdown) must be 50 V or greater
Maximum collector current must be 100 mA or greater
Power dissipation must be 200 mW or greater
Internal base resistor (R1) must be 22 kOhms
Internal emitter-base resistor (R2) must be 22 kOhms

Mechanical Compatibility Requirements:

Surface mount packaging only
SOT-323 (SC-70) package format preferred for direct pin-compatible substitution
Alternative packages (SOT-23-3, SOT-523, UMT3) require PCB layout modification

Compliance Requirements:

ROHS3 compliance mandatory
Active product status required
Moisture sensitivity level 1 (unlimited) required

Substitute parts are grouped into three categories based on packaging compatibility: SOT-323 direct substitutes, SOT-23-3 package variants, and SOT-523 miniature variants. Parts with different internal resistor values or reduced current ratings are listed as limited-compatibility alternatives requiring circuit re-evaluation.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce (Max) V	R1 (kOhms)	R2 (kOhms)	hFE (Min)	Vce Sat (Max) mV	Power (Max) mW	Package	Frequency (MHz)
PDTA124EU,115	Nexperia USA Inc.	100	50	22	22	60	150	200	SOT-323	—
DDTA124EUA-7-F	Diodes Incorporated	100	50	22	22	56	300	200	SOT-323	250
DDTA124GCA-7-F	Diodes Incorporated	100	50	—	22	56	300	200	SOT-23-3	250
DDTA124GUA-7-F	Diodes Incorporated	100	50	—	22	56	300	200	SOT-323	250
DDTA124TE-7-F	Diodes Incorporated	100	50	22	—	100	300	150	SOT-523	250
DDTA124TUA-7-F	Diodes Incorporated	100	50	22	—	100	300	200	SOT-323	250
DTA114EUAT106	Rohm Semiconductor	50	50	10	10	30	300	200	SOT-323	250
DTA115EUAT106	Rohm Semiconductor	20	50	100	100	82	300	200	SOT-323	250
DTA123EUAT106	Rohm Semiconductor	100	50	2.2	2.2	20	300	200	SOT-323	250
DTA124EUA-TP	Micro Commercial Co	100	50	22	22	56	300	200	SOT-323	250
DTA124EUAT106	Rohm Semiconductor	30	50	22	22	56	300	200	SOT-323	250

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (SOT-323 Package):

DDTA124EUA-7-F, DDTA124GUA-7-F, DDTA124TUA-7-F, DTA124EUA-TP, and DTA124EUAT106 are electrically and mechanically compatible with the PDTA124EU,115 for applications requiring 100 mA collector current and 50 V breakdown voltage. All substitute parts maintain 22 kOhm base and emitter-base resistor values, ROHS3 compliance, and active product status. DDTA124EUA-7-F and DTA124EUA-TP provide the closest electrical match with 56 mA hFE minimum and 300 mV saturation voltage. DDTA124TUA-7-F offers higher current gain (100 mA hFE minimum) in the same package. DTA124EUAT106 operates at reduced maximum collector current (30 mA) and requires circuit evaluation for current-limited applications.

Alternative Package Substitutes:

DDTA124GCA-7-F provides SOT-23-3 packaging with identical electrical specifications to DDTA124GUA-7-F. This package variant requires PCB layout modification but maintains all electrical parameters. DDTA124TE-7-F operates in SOT-523 miniature packaging with reduced power dissipation (150 mW) and higher current gain (100 mA hFE minimum), suitable for space-constrained designs with lower power budgets.

Limited-Compatibility Alternatives:

DTA114EUAT106 (50 mA maximum collector current, 10 kOhm resistors) and DTA115EUAT106 (20 mA maximum collector current, 100 kOhm resistors) are suitable only for applications with reduced current requirements. DTA123EUAT106 (2.2 kOhm resistors) provides aggressive biasing for high-speed switching applications but requires circuit re-evaluation due to significantly different internal resistor values.

All listed substitutes carry ROHS3 compliance, active product status, and moisture sensitivity level 1 (unlimited).

Frequently Asked Questions (FAQ)

Q: Can DDTA124EUA-7-F directly replace PDTA124EU,115 without PCB modification?

A: Yes. DDTA124EUA-7-F is pin-compatible in SOT-323 packaging with matching 22 kOhm internal resistors, 100 mA collector current rating, and 50 V breakdown voltage. The primary difference is saturation voltage (300 mV versus 150 mV), which affects switching speed in saturation-mode applications. Verify circuit timing requirements before substitution.

Q: What is the difference between DDTA124GUA-7-F and DDTA124GCA-7-F?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications. DDTA124GUA-7-F uses SOT-323 packaging (SC-70), while DDTA124GCA-7-F uses SOT-23-3 packaging (TO-236-3). PCB footprint and land pattern differ; SOT-23-3 is slightly larger. Select based on available PCB space and existing design layout.

Q: Why does DTA124EUAT106 have a lower maximum collector current (30 mA) than the main part?

A: DTA124EUAT106 is a Rohm Semiconductor variant with identical internal resistor values (22 kOhms) and electrical characteristics but reduced current rating. This part is suitable for low-current biasing applications. Applications requiring full 100 mA collector current must use DDTA124EUA-7-F, DDTA124GUA-7-F, DDTA124TUA-7-F, or DTA124EUA-TP.

Q: Can DTA115EUAT106 substitute for PDTA124EU,115 in a high-impedance biasing circuit?

A: DTA115EUAT106 has 100 kOhm internal resistors (versus 22 kOhms in PDTA124EU,115) and maximum collector current of 20 mA (versus 100 mA). This part is suitable only for applications with reduced current requirements and high-impedance biasing networks. Circuit re-evaluation is required; direct substitution is not recommended.

Q: Are all substitute parts AEC-Q100 qualified like the main part?

A: The provided data does not specify AEC-Q100 qualification for substitute parts. PDTA124EU,115 carries explicit AEC-Q100 automotive qualification. For automotive applications requiring AEC-Q100 certification, verify qualification status with the substitute part manufacturer before design release.

Q: What is the impact of using DDTA124TE-7-F (SOT-523) instead of PDTA124EU,115 (SOT-323)?

A: DDTA124TE-7-F operates in SOT-523 miniature packaging with 150 mW maximum power dissipation (versus 200 mW). The smaller package reduces PCB area but requires new footprint design. Electrical specifications are compatible (100 mA collector current, 50 V breakdown, 22 kOhm base resistor). Verify thermal performance in the target application due to reduced power rating.

Q: Which substitute part has the lowest saturation voltage?

A: PDTA124EU,115 has the lowest saturation voltage at 150 mV (measured at 500 µA base current, 10 mA collector current). All Diodes Incorporated and Rohm Semiconductor substitutes specify 300 mV saturation voltage. For applications sensitive to saturation voltage, the main part provides superior performance.

Q: Can DTA123EUAT106 be used in place of PDTA124EU,115?

A: DTA123EUAT106 has 2.2 kOhm internal resistors (versus 22 kOhms) and lower current gain (20 mA hFE minimum versus 60 mA). This part provides aggressive biasing suitable for high-speed switching but requires complete circuit re-evaluation. Direct substitution is not recommended without circuit analysis.

Q: What packaging options are available for 100 mA, 50 V pre-biased PNP transistors?

A: SOT-323 (SC-70) is the primary package for 100 mA rated parts: DDTA124EUA-7-F, DDTA124GUA-7-F, DDTA124TUA-7-F, DTA124EUA-TP. SOT-23-3 (TO-236-3) is available as DDTA124GCA-7-F. SOT-523 miniature package is available as DDTA124TE-7-F with reduced power rating (150 mW). Select based on PCB space constraints and thermal requirements.

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