DTA143EUA-TP Equivalent & Substitute Parts

Part Overview

The DTA143EUA-TP is a pre-biased PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-323 package. This component operates at 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and transition frequency of 250 MHz. The device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and component availability across multiple manufacturers including onsemi, Diodes Incorporated, and Rohm Semiconductor.

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)	4.7	kOhms
Emitter-Base Resistor (R2)	4.7	kOhms
DC Current Gain (hFE) Minimum	30	@ 10mA, 5V
Vce Saturation Maximum	300	mV @ 500µA, 10mA
Collector Cutoff Current (Icbo)	500	nA
Transition Frequency (fT)	250	MHz
Maximum Power Dissipation	200	mW
Package Type	SOT-323 / SC-70	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the DTA143EUA-TP are classified based on electrical and mechanical parameter compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Transistor type: PNP pre-biased configuration
Collector-emitter breakdown voltage: 50 V
Maximum collector current: 100 mA (or higher)
Base and emitter-base resistor values: 4.7 kOhms each
DC current gain (hFE) minimum: 30 or higher at specified test conditions
Transition frequency: 250 MHz
Package: SOT-323 / SC-70 surface mount
Power dissipation: 200 mW or higher
Compliance: RoHS3, MSL 1

Upgrade Substitute: NSVMUN5132T1G (onsemi) provides direct electrical equivalence with identical resistor values and voltage/current ratings, though with slightly lower power rating (202 mW).

Similar Substitutes: Parts from Diodes Incorporated (DDTA143EUA-7-F, DDTA143XUA-7-F) and Rohm Semiconductor (DTA143EUAT106) maintain core electrical specifications with variations in internal resistor networks and DC current gain characteristics. These parts support functional equivalence within the same application space.

Limited Current Substitutes: DTA114EUAT106 and DTA115EUAT106 from Rohm Semiconductor feature reduced maximum collector current (50 mA and 20 mA respectively) and are suitable only for applications with lower current requirements.

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vceo (V)	R1 (kΩ)	R2 (kΩ)	hFE Min @ Test	Vce Sat Max (mV)	fT (MHz)	P Max (mW)	Package
DTA143EUA-TP	Micro Commercial Co	100	50	4.7	4.7	30 @ 10mA, 5V	300 @ 500µA, 10mA	250	200	SOT-323
NSVMUN5132T1G	onsemi	100	50	4.7	4.7	15 @ 5mA, 10V	250 @ 1mA, 10mA	—	202	SC-70-3
DDTA143EUA-7-F	Diodes Incorporated	100	50	4.7	4.7	20 @ 10mA, 5V	300 @ 500µA, 10mA	250	200	SOT-323
DDTA143XUA-7-F	Diodes Incorporated	100	50	4.7	10	30 @ 10mA, 5V	300 @ 500µA, 10mA	250	200	SOT-323
DTA143EUAT106	Rohm Semiconductor	100	50	4.7	4.7	30 @ 10mA, 5V	300 @ 500µA, 10mA	250	200	UMT3
DTA114EUAT106	Rohm Semiconductor	50	50	10	10	30 @ 5mA, 5V	300 @ 500µA, 10mA	250	200	UMT3
DTA115EUAT106	Rohm Semiconductor	20	50	100	100	82 @ 5mA, 5V	300 @ 250µA, 5mA	250	200	UMT3
DTA123EUAT106	Rohm Semiconductor	100	50	2.2	2.2	20 @ 5mA, 5V	300 @ 500µA, 10mA	250	200	UMT3
DTA124EUAT106	Rohm Semiconductor	30	50	22	22	56 @ 5mA, 5V	300 @ 500µA, 10mA	250	200	UMT3
DDTA114YUA-7-F	Diodes Incorporated	100	50	10	47	68 @ 10mA, 5V	300 @ 250µA, 5mA	250	200	SOT-323
DDTA144VUA-7-F	Diodes Incorporated	100	50	47	10	33 @ 10mA, 5V	300 @ 500µA, 5mA	250	200	SOT-323

Engineering Selection Recommendations

Direct Equivalent (Upgrade Substitute): NSVMUN5132T1G from onsemi is the primary upgrade substitute, offering identical base and emitter-base resistor values (4.7 kOhms each) with matching voltage and current ratings. This part maintains RoHS3 compliance and MSL 1 rating. The slightly lower power rating (202 mW vs. 200 mW) is within acceptable tolerance for most applications. Inventory availability is higher (5653 pcs) compared to the main part (3881 pcs).

Direct Functional Equivalent (Same Resistor Network): DDTA143EUA-7-F and DTA143EUAT106 provide direct functional equivalence with identical 4.7 kOhms resistor configuration. Both maintain 100 mA collector current, 50 V breakdown voltage, and 200 mW power dissipation. DDTA143EUA-7-F from Diodes Incorporated offers significantly higher inventory (50100 pcs). DTA143EUAT106 from Rohm Semiconductor is available in UMT3 package variant (35100 pcs inventory).

Modified Resistor Network Equivalent: DDTA143XUA-7-F from Diodes Incorporated features modified emitter-base resistor (10 kOhms vs. 4.7 kOhms) while maintaining base resistor at 4.7 kOhms. This configuration produces identical DC current gain (30 @ 10mA, 5V) and is suitable for applications where the resistor network variation is acceptable.

Current-Limited Substitutes: DTA114EUAT106 (50 mA max) and DTA115EUAT106 (20 mA max) are suitable only for applications with reduced current requirements. These parts feature different resistor networks and are not interchangeable for 100 mA applications.

Lower Base Resistance Variant: DTA123EUAT106 from Rohm Semiconductor features reduced resistor values (2.2 kOhms each) with maintained 100 mA collector current. This configuration is suitable for applications requiring faster switching response.

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and Active product status. Package variants include SOT-323 (Diodes Incorporated, Micro Commercial Co) and UMT3 (Rohm Semiconductor) configurations.

Frequently Asked Questions (FAQ)

Q: Can NSVMUN5132T1G directly replace DTA143EUA-TP in all applications?

A: NSVMUN5132T1G is the primary upgrade substitute with identical base and emitter-base resistor values (4.7 kOhms each), matching voltage and current specifications. The package designation differs (SC-70-3 vs. SOT-323), but both are equivalent surface mount packages. Verify PCB footprint compatibility before substitution.

Q: What is the difference between DTA143EUAT106 and DTA143EUA-TP?

A: Both parts share identical electrical specifications: 100 mA collector current, 50 V breakdown voltage, 4.7 kOhms resistor network, and 200 mW power dissipation. The primary difference is packaging: DTA143EUAT106 uses UMT3 package (Rohm Semiconductor), while DTA143EUA-TP uses SOT-323 package (Micro Commercial Co). Footprints are equivalent for surface mount applications.

Q: Why does DDTA143XUA-7-F have a different emitter-base resistor value?

A: DDTA143XUA-7-F features a 10 kOhms emitter-base resistor (vs. 4.7 kOhms in DTA143EUA-TP) while maintaining the 4.7 kOhms base resistor. This modified network produces the same DC current gain (30 @ 10mA, 5V) and is functionally equivalent. The resistor network variation affects switching characteristics and should be evaluated for specific circuit requirements.

Q: Can DTA114EUAT106 or DTA115EUAT106 replace DTA143EUA-TP?

A: No. DTA114EUAT106 is limited to 50 mA maximum collector current, and DTA115EUAT106 is limited to 20 mA. These parts are not suitable for applications requiring the full 100 mA capability of DTA143EUA-TP. Use these parts only in circuits designed for reduced current operation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the environmental and regulatory requirements of the main part DTA143EUA-TP.

Q: What is the significance of the resistor network in pre-biased transistors?

A: The internal resistor network (R1 base resistor and R2 emitter-base resistor) determines the biasing characteristics and switching response of the pre-biased transistor. Identical resistor values ensure equivalent DC current gain and saturation voltage. Variations in resistor values produce different biasing conditions and should be evaluated for circuit compatibility.

Q: Which substitute offers the best inventory availability?

A: DDTA143EUA-7-F from Diodes Incorporated offers the highest inventory (50100 pcs) with direct electrical equivalence to DTA143EUA-TP. DDTA143XUA-7-F (2341 pcs) and DTA143EUAT106 (35100 pcs) provide alternative sources with comparable specifications.

Q: Are SOT-323 and SC-70 packages interchangeable?

A: SOT-323 and SC-70 are equivalent package designations for the same three-lead surface mount package. Both feature identical pin configuration and footprint dimensions. Parts specified as SC-70-3 or SOT-323 are mechanically and electrically interchangeable.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging supplies components on continuous tape suitable for automated pick-and-place assembly. Cut Tape & Digi-Reel packaging provides components in smaller quantities on cut tape segments. Both formats are compatible with standard surface mount assembly processes; selection depends on production volume and assembly equipment requirements.

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