PDTA143ZQBZ Equivalent & Substitute Parts

Part Overview

The PDTA143ZQBZ is a pre-biased PNP bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in a 3-XDFN surface mount package with wettable flank. This component integrates internal base and emitter-base resistors, enabling direct logic-level switching applications without external biasing networks. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications.

Substiute Parts

PDTA143ZQBZ

Nexperia USA Inc.In Stock: 5878PDTA143ZQBZ Datasheet

Current PartRFQ

PDTA143ZQB-QZ

Nexperia USA Inc.In Stock: 5951PDTA143ZQB-QZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDTA143ZQBZ is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor type: PNP - Pre-Biased configuration
• Maximum collector current: 100 mA
• Collector-emitter breakdown voltage: 50 V
• Internal base resistor (R1): 4.7 kOhms
• Internal emitter-base resistor (R2): 47 kOhms
• DC current gain (hFE): 100 minimum at specified conditions
• Saturation voltage: 100 mV maximum at specified bias conditions
• Transition frequency: 180 MHz
• Maximum power dissipation: 340 mW

Mechanical Equivalence Criteria:

• Package type: 3-XDFN Exposed Pad (DFN1110D-3)
• Mounting technology: Surface Mount with Wettable Flank
• Lead-free and RoHS3 compliance

The PDTA143ZQB-QZ meets all specified electrical and mechanical parameters and is identified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The PDTA143ZQB-QZ is the direct functional equivalent of the obsolete PDTA143ZQBZ. Both components share identical electrical specifications across all critical parameters: collector current rating, breakdown voltage, internal resistor values, gain characteristics, saturation voltage, cutoff current, transition frequency, and power dissipation. Both are packaged in the 3-XDFN surface mount configuration with wettable flank and meet ROHS3 compliance requirements.

The PDTA143ZQB-QZ offers two additional advantages over the main part:

1. Active Product Status: The substitute is currently in active production, ensuring long-term availability and supply chain continuity.

2. Enhanced Moisture Sensitivity: The substitute carries MSL 1 (unlimited moisture exposure) compared to MSL 3 (168 hours) for the main part, reducing moisture-related handling and storage constraints.

3. Automotive Qualification: The substitute includes AEC-Q101 qualification, enabling use in automotive applications where this certification is required.

For applications requiring only the base electrical and mechanical specifications, the PDTA143ZQB-QZ provides direct substitution without circuit modification or performance compromise.

Frequently Asked Questions (FAQ)

Q: Can the PDTA143ZQB-QZ be used as a direct replacement for the PDTA143ZQBZ in existing designs?

A: Yes. The PDTA143ZQB-QZ is electrically and mechanically identical to the PDTA143ZQBZ across all specified parameters. No circuit modifications, PCB layout changes, or firmware adjustments are required. Both components operate identically in the same application context.

Q: What is the significance of the different product status classifications?

A: The PDTA143ZQBZ is classified as obsolete, indicating Nexperia has discontinued production and support. The PDTA143ZQB-QZ is active, meaning it is currently manufactured and supported. For new designs or ongoing production, the active substitute ensures supply availability and manufacturer support.

Q: How do the moisture sensitivity levels differ between these parts?

A: The PDTA143ZQBZ carries MSL 3, requiring storage at controlled humidity for up to 168 hours before soldering. The PDTA143ZQB-QZ carries MSL 1, which has no moisture exposure time limit. This means the substitute can be stored and handled with fewer moisture-related constraints, reducing production complexity.

Q: Are there any package or footprint differences between these parts?

A: No. Both components use the identical 3-XDFN Exposed Pad package (DFN1110D-3) with wettable flank surface mount technology. PCB footprints, solder pad layouts, and assembly processes are identical.

Q: Does the AEC-Q101 qualification on the substitute affect its use in non-automotive applications?

A: No. AEC-Q101 qualification is an additional certification that enables automotive use. It does not restrict use in other applications. The substitute functions identically in consumer, industrial, and other non-automotive contexts.

Q: What are the internal resistor values, and why are they important for substitution?

A: The PDTA143ZQBZ and PDTA143ZQB-QZ both integrate R1 (base resistor) of 4.7 kOhms and R2 (emitter-base resistor) of 47 kOhms. These internal resistors define the pre-biasing network and switching characteristics. Identical values ensure identical switching behavior and logic-level compatibility in the application circuit.

Q: Can these parts be used interchangeably in high-frequency applications?

A: Yes. Both components specify a transition frequency of 180 MHz, supporting identical high-frequency performance. Applications operating within this frequency specification experience no performance difference between the main part and substitute.