PDTA144WM,315 Equivalent & Substitute Parts

Part Overview

The PDTA144WM,315 is a pre-biased PNP bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in SOT-883 surface mount packaging. This component integrates internal base and emitter-base resistors, enabling direct interface with logic-level signals without external biasing networks. The device is rated for 50 V collector-emitter breakdown voltage, 100 mA maximum collector current, and 250 mW power dissipation. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or supply chain considerations.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Pre-Biased	—
Collector Current (Max)	100	mA
Collector-Emitter Breakdown Voltage (Max)	50	V
Base Resistor (R1)	47	kOhms
Emitter-Base Resistor (R2)	22	kOhms
DC Current Gain (hFE) Min @ Ic, Vce	60 @ 5mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	150mV @ 500µA, 10mA	—
Collector Cutoff Current (Max)	1	µA
Power Dissipation (Max)	250	mW
Package / Case	SOT-883 (SC-101)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the PDTA144WM,315 is determined by equivalence in the following critical parameters:

Mandatory Equivalence Criteria:

Transistor type: PNP - Pre-Biased configuration
Collector-emitter breakdown voltage: 50 V (minimum)
Maximum collector current: 100 mA or greater
Power dissipation: 250 mW or greater
Surface mount packaging with compatible footprint
RoHS3 compliance and MSL 1 rating

Substitution Logic: The PDTA144WM,315 specifies internal resistor values of R1 = 47 kOhms and R2 = 22 kOhms. Substitute parts may employ different internal resistor configurations while maintaining the same voltage and current ratings. Variations in DC current gain (hFE), saturation voltage (Vce), and cutoff current are acceptable provided the substitute part operates within the same functional envelope for pre-biased switching applications. Package form factor differences (SOT-883 versus 3-UFDFN) are permitted when mechanical constraints allow alternative surface mount geometries.

Parameter Comparison

Parameter	PDTA144WM,315	DDTA114YLP-7	DDTA144ELP-7
Manufacturer	Nexperia USA Inc.	Diodes Incorporated	Diodes Incorporated
Transistor Type	PNP - Pre-Biased	PNP - Pre-Biased	PNP - Pre-Biased
Collector Current (Max)	100 mA	100 mA	200 mA
Collector-Emitter Breakdown Voltage (Max)	50 V	50 V	50 V
Base Resistor (R1)	47 kOhms	10 kOhms	47 kOhms
Emitter-Base Resistor (R2)	22 kOhms	47 kOhms	47 kOhms
DC Current Gain (hFE) Min @ Ic, Vce	60 @ 5mA, 5V	80 @ 5mA, 5V	250 @ 300mA, 5V
Vce Saturation (Max) @ Ib, Ic	150mV @ 500µA, 10mA	250mV @ 2.5mA, 50mA	800mV @ 1mA, 40mA
Collector Cutoff Current (Max)	1 µA	500 nA	100 nA
Power Dissipation (Max)	250 mW	250 mW	250 mW
Package / Case	SOT-883	3-UFDFN	3-UFDFN
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Qualification	—	—	AEC-Q101

Engineering Selection Recommendations

DDTA114YLP-7 (Diodes Incorporated): This substitute maintains 100 mA collector current and 50 V breakdown voltage equivalent to the PDTA144WM,315. The part differs in internal resistor configuration (R1 = 10 kOhms, R2 = 47 kOhms) and exhibits higher DC current gain (80 vs. 60 @ 5mA, 5V). The DDTA114YLP-7 features lower collector cutoff current (500 nA vs. 1 µA) and higher saturation voltage (250 mV vs. 150 mV). Package form factor is 3-UFDFN rather than SOT-883. All compliance certifications (RoHS3, MSL 1, REACH Unaffected) are equivalent. This substitute is suitable for applications where the different internal resistor ratios and saturation characteristics are compatible with circuit design requirements.

DDTA144ELP-7 (Diodes Incorporated): This substitute provides enhanced collector current capability (200 mA vs. 100 mA) while maintaining 50 V breakdown voltage. Internal resistor configuration matches the PDTA144WM,315 (R1 = 47 kOhms, R2 = 47 kOhms). The part exhibits significantly higher DC current gain (250 @ 300mA, 5V) and lower collector cutoff current (100 nA vs. 1 µA). Saturation voltage is higher (800 mV vs. 150 mV). The DDTA144ELP-7 carries AEC-Q101 automotive qualification in addition to RoHS3 compliance and MSL 1 rating. Package form factor is 3-UFDFN. This substitute is applicable for designs requiring higher current capacity and automotive-grade reliability.

Both substitute parts maintain Active product status and full regulatory compliance. Selection between substitutes depends on specific circuit requirements regarding internal resistor values, current gain characteristics, and package geometry compatibility.

Frequently Asked Questions (FAQ)

Q: Can the DDTA114YLP-7 be used as a direct replacement for the PDTA144WM,315?

A: The DDTA114YLP-7 is electrically compatible as a substitute provided the circuit design accommodates differences in internal resistor configuration (R1 = 10 kOhms vs. 47 kOhms; R2 = 47 kOhms vs. 22 kOhms) and saturation voltage characteristics (250 mV vs. 150 mV). Both parts maintain 100 mA collector current and 50 V breakdown voltage. Package geometry differs (3-UFDFN vs. SOT-883), requiring PCB layout modification.

Q: What are the key differences between DDTA144ELP-7 and PDTA144WM,315?

A: The DDTA144ELP-7 provides double the collector current rating (200 mA vs. 100 mA) and matches the internal resistor configuration of the PDTA144WM,315 (R1 = 47 kOhms, R2 = 47 kOhms). The DDTA144ELP-7 exhibits higher DC current gain and lower cutoff current. Saturation voltage is significantly higher (800 mV vs. 150 mV). The DDTA144ELP-7 includes AEC-Q101 automotive qualification. Package form factor is 3-UFDFN rather than SOT-883.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both DDTA114YLP-7 and DDTA144ELP-7 are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the PDTA144WM,315 compliance profile.

Q: Does package form factor affect substitution eligibility?

A: Package form factor is a mechanical consideration. The PDTA144WM,315 uses SOT-883 (SC-101) packaging, while both substitute parts use 3-UFDFN (X1-DFN1006-3) packaging. Substitution requires PCB layout modification to accommodate the different footprint geometry. Electrical performance is independent of package form factor.

Q: Which substitute part should be selected for automotive applications?

A: The DDTA144ELP-7 carries AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. The PDTA144WM,315 and DDTA114YLP-7 do not specify automotive qualification.

Q: How do internal resistor differences affect circuit behavior?

A: Internal resistor values (R1 and R2) determine the pre-bias switching threshold and response characteristics. The PDTA144WM,315 uses R1 = 47 kOhms and R2 = 22 kOhms. The DDTA114YLP-7 uses R1 = 10 kOhms and R2 = 47 kOhms, resulting in different bias conditions. The DDTA144ELP-7 uses R1 = 47 kOhms and R2 = 47 kOhms. Circuit design must verify compatibility with the specific resistor configuration of the selected substitute.

Q: What is the significance of collector cutoff current differences?

A: Collector cutoff current (Icbo) represents leakage current in the off state. The PDTA144WM,315 specifies 1 µA maximum, while DDTA114YLP-7 specifies 500 nA and DDTA144ELP-7 specifies 100 nA. Lower cutoff current indicates better off-state performance. Applications sensitive to leakage current may benefit from substitutes with lower Icbo ratings.

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