PDTA124EE,115 Pre-Biased PNP Transistor Equivalent & Substitute Parts

Part Overview

The PDTA124EE,115 is a pre-biased PNP bipolar junction transistor (BJT) manufactured by NXP USA Inc. in SC-75 (SOT-416) surface mount package. This device integrates internal base and emitter resistors (22 kOhms each) for simplified circuit design, rated at 50 V collector-emitter breakdown voltage and 100 mA maximum collector current with 150 mW power dissipation.

The PDTA124EE,115 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives from Diodes Incorporated, Rohm Semiconductor, and onsemi provide functionally compatible solutions with enhanced specifications and current manufacturing status.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Pre-Biased	—
Collector Current (Ic) Maximum	100	mA
Collector-Emitter Breakdown Voltage (Vceo)	50	V
Base Resistor (R1)	22	kOhms
Emitter-Base Resistor (R2)	22	kOhms
DC Current Gain (hFE) @ Ic, Vce	60 @ 5mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	150mV @ 500µA, 10mA	—
Collector Cutoff Current (Icbo)	1	µA
Power Dissipation Maximum	150	mW
Package Type	SC-75, SOT-416	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the PDTA124EE,115 is determined by strict alignment of electrical and mechanical parameters. The following criteria establish compatibility:

Primary Substitution Criteria:

Transistor type: PNP - Pre-Biased configuration
Collector current rating: 100 mA minimum
Collector-emitter breakdown voltage: 50 V minimum
Base resistor (R1): 22 kOhms (or functionally equivalent internal biasing)
Emitter-base resistor (R2): 22 kOhms (or functionally equivalent internal biasing)
DC current gain (hFE): 60 minimum @ specified test conditions
Vce saturation: 300 mV maximum @ rated conditions
Package compatibility: Surface mount form factor

Substitute Parts Categorized by Package Type:

Category 1: SC-75 / SOT-416 Package (Direct Footprint Match)

DTA124EET1G (onsemi) — Active status, identical package, matching resistor values

Category 2: SOT-23-3 Package (Compact Alternative)

DDTA124GCA-7-F (Diodes Incorporated) — Active status, 200 mW power rating, 250 MHz transition frequency

Category 3: SOT-523 Package (Ultra-Compact)

DDTA124GE-7-F (Diodes Incorporated) — Active status, 150 mW power rating
DDTA124TE-7-F (Diodes Incorporated) — Active status, 150 mW power rating

Category 4: SOT-323 Package (Compact)

DDTA124GUA-7-F (Diodes Incorporated) — Active status, 200 mW power rating
DDTA124TUA-7-F (Diodes Incorporated) — Active status, 200 mW power rating

Category 5: SOT-23F Package (Flat Lead Variant)

DDTA124TCA-7-F (Diodes Incorporated) — Active status, 200 mW power rating, hFE 100 @ 1mA

Category 6: EMT3 Package (SC-75 Equivalent)

DTA114EETL (Rohm Semiconductor) — Active status, 10 kOhm internal resistors, hFE 30 @ 5mA
DTA123EETL (Rohm Semiconductor) — Active status, 2.2 kOhm internal resistors, hFE 20 @ 20mA

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and REACH unaffected status consistent with the original part.

Parameter Comparison

Part Number	Manufacturer	Package	Status	Ic (Max) mA	Vceo (Max) V	R1 kOhms	R2 kOhms	hFE @ Test Condition	Vce Sat (Max) mV	Power (Max) mW	Freq MHz
PDTA124EE,115	NXP USA Inc.	SC-75	Obsolete	100	50	22	22	60 @ 5mA, 5V	150	150	—
DTA124EET1G	onsemi	SC-75	Active	100	50	22	22	60 @ 5mA, 10V	250	200	—
DDTA124GCA-7-F	Diodes Inc.	SOT-23-3	Active	100	50	—	22	56 @ 5mA, 5V	300	200	250
DDTA124GE-7-F	Diodes Inc.	SOT-523	Active	100	50	—	22	56 @ 5mA, 5V	300	150	250
DDTA124GUA-7-F	Diodes Inc.	SOT-323	Active	100	50	—	22	56 @ 5mA, 5V	300	200	250
DDTA124TE-7-F	Diodes Inc.	SOT-523	Active	100	50	22	—	100 @ 1mA, 5V	300	150	250
DDTA124TCA-7-F	Diodes Inc.	SOT-23F	Active	100	50	22	—	100 @ 1mA, 5V	300	200	250
DDTA124TUA-7-F	Diodes Inc.	SOT-323	Active	100	50	22	—	100 @ 1mA, 5V	300	200	250
DTA114EETL	Rohm Semi.	EMT3	Active	100	50	10	10	30 @ 5mA, 5V	300	150	250
DTA123EETL	Rohm Semi.	EMT3	Active	100	50	2.2	2.2	20 @ 20mA, 5V	300	150	250
DTA115EETL	Rohm Semi.	EMT3	Active	20	50	100	100	82 @ 5mA, 5V	300	150	250

Engineering Selection Recommendations

Direct Replacement (Identical Footprint): DTA124EET1G from onsemi is the primary direct replacement for PDTA124EE,115. Both devices use SC-75 (SOT-416) package with matching 22 kOhm internal resistor configuration. DTA124EET1G maintains active product status with ROHS3 compliance and MSL 1 rating. The part offers improved power dissipation (200 mW vs. 150 mW) and is currently in production with established supply chain availability.

Alternative Package Solutions: When PCB layout permits package substitution, Diodes Incorporated DDTA124 series provides multiple form factors (SOT-23-3, SOT-523, SOT-323, SOT-23F) with active status and enhanced specifications. All DDTA124 variants maintain 50 V Vceo rating, 100 mA Ic rating, and 22 kOhm emitter-base resistor. These parts feature 250 MHz transition frequency and improved Vce saturation characteristics (300 mV maximum).

Resistor Value Considerations: DTA114EETL (Rohm) provides 10 kOhm internal resistors and lower hFE (30 @ 5mA), suitable for applications requiring reduced base drive sensitivity. DTA123EETL (Rohm) provides 2.2 kOhm internal resistors and lower hFE (20 @ 20mA), suitable for high-speed switching applications. DTA115EETL (Rohm) provides 100 kOhm internal resistors and reduced collector current (20 mA maximum), suitable for low-current signal applications.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating. No additional qualification or testing documentation is required for direct electrical substitution within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can DTA124EET1G directly replace PDTA124EE,115 without PCB modification?

A: Yes. DTA124EET1G uses identical SC-75 (SOT-416) package footprint with matching pin configuration. Internal resistor values (22 kOhms) and electrical ratings (50 V, 100 mA, hFE 60) are equivalent. No PCB layout changes are required.

Q: What is the difference between DDTA124GCA-7-F and DDTA124GE-7-F?

A: Both parts use Diodes Incorporated DDTA124 base design with 50 V, 100 mA, and 22 kOhm emitter-base resistor. DDTA124GCA-7-F uses SOT-23-3 package with 200 mW power rating. DDTA124GE-7-F uses SOT-523 package with 150 mW power rating. Electrical performance is identical; package selection depends on PCB space constraints.

Q: Why do some substitute parts show different hFE values?

A: Internal resistor network design determines hFE characteristics. DDTA124 series (hFE 56-100) and DTA114/DTA123 series use different resistor ratios optimized for specific application requirements. Verify hFE specification matches circuit design requirements before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status identical to the original PDTA124EE,115. MSL 1 (unlimited) moisture sensitivity rating applies to all parts.

Q: Can DTA115EETL replace PDTA124EE,115?

A: No. DTA115EETL has maximum collector current of 20 mA, compared to 100 mA for PDTA124EE,115. This part is suitable only for low-current applications and cannot support circuits designed for 100 mA operation.

Q: What is the advantage of SOT-23-3 package over SC-75?

A: SOT-23-3 package (DDTA124GCA-7-F) provides smaller footprint and lower profile suitable for space-constrained applications. Electrical performance remains equivalent to SC-75 package. PCB layout redesign is required for package migration.

Q: Do substitute parts require different circuit design considerations?

A: No. All substitute parts maintain pre-biased PNP configuration with internal base and emitter resistors. Circuit design remains unchanged. Verify Vce saturation and hFE specifications match application requirements before final selection.

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