PDTC143ZQBZ Equivalent & Substitute Parts

Part Overview

The PDTC143ZQBZ is a pre-biased NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the 3-XDFN package with exposed pad. This component integrates internal base and emitter-base resistors, enabling direct logic-level switching without external biasing networks.

The PDTC143ZQBZ carries an obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor topology.

Substiute Parts

PDTC143ZQBZ

Nexperia USA Inc.In Stock: 5917PDTC143ZQBZ Datasheet

Current PartRFQ

PDTC143ZQB-QZ

Nexperia USA Inc.In Stock: 6207PDTC143ZQB-QZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDTC143ZQBZ is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Transistor type: NPN - Pre-Biased
• Maximum collector current: 100 mA
• Collector-emitter breakdown voltage: 50 V
• Base resistor (R1): 4.7 kOhms
• Emitter-base resistor (R2): 47 kOhms
• DC current gain (hFE): 100 minimum @ 10mA, 5V
• Saturation voltage: 100 mV maximum @ 250µA, 5mA
• Collector cutoff current: 100 nA maximum
• Maximum power dissipation: 340 mW

Mechanical Equivalence Criteria:

• Package type: 3-XDFN Exposed Pad
• Supplier device package: DFN1110D-3
• Mounting type: Surface Mount, Wettable Flank

Compliance Equivalence Criteria:

• RoHS3 compliance
• REACH unaffected status
• Moisture sensitivity level: 1 (Unlimited)

Substitute parts must maintain identical electrical performance across all specified parameters and identical mechanical compatibility with the DFN1110D-3 footprint. Variations in transition frequency above the minimum specification do not disqualify substitution when all other parameters remain within tolerance.

Parameter Comparison

Engineering Selection Recommendations

The PDTC143ZQB-QZ is a direct functional substitute for the obsolete PDTC143ZQBZ. Both components share identical electrical specifications across all critical parameters: collector current, breakdown voltage, internal resistor values, current gain, saturation voltage, and cutoff current. Both components are packaged in the DFN1110D-3 surface mount package with wettable flank and exposed pad, ensuring mechanical and thermal compatibility.

The primary distinction between these parts is product status and automotive qualification. The PDTC143ZQBZ is obsolete, while the PDTC143ZQB-QZ maintains active production status. The PDTC143ZQB-QZ carries automotive-grade qualification (AEC-Q101), indicating enhanced reliability and process control suitable for automotive applications. The transition frequency specification of the PDTC143ZQB-QZ (230 MHz) exceeds that of the PDTC143ZQBZ (180 MHz), representing an improvement in high-frequency performance while maintaining all other electrical parameters within identical specifications.

Both components comply with ROHS3 and REACH requirements, carry unlimited moisture sensitivity level (MSL 1), and are manufactured by Nexperia USA Inc. Selection between these parts should be based on application requirements and supply chain availability, with the PDTC143ZQB-QZ recommended for new designs and ongoing production due to its active status and automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can the PDTC143ZQB-QZ replace the PDTC143ZQBZ in existing designs?

A: Yes. The PDTC143ZQB-QZ is electrically and mechanically equivalent to the PDTC143ZQBZ across all specified parameters. Both components feature identical collector current (100 mA), breakdown voltage (50 V), internal resistor values (4.7 kOhms base, 47 kOhms emitter-base), current gain (100 minimum), saturation voltage (100 mV), and power dissipation (340 mW). Both use the DFN1110D-3 package with identical pinout and thermal characteristics.

Q: What is the difference between these two parts?

A: The PDTC143ZQBZ is obsolete, while the PDTC143ZQB-QZ is in active production. The PDTC143ZQB-QZ carries automotive-grade qualification (AEC-Q101) and specifies a higher transition frequency (230 MHz versus 180 MHz). All other electrical and mechanical specifications remain identical.

Q: Are there package compatibility concerns?

A: No. Both parts use the 3-XDFN Exposed Pad package (DFN1110D-3) with surface mount, wettable flank construction. PCB footprints, solder pad layouts, and thermal via requirements are identical. No layout modifications are required for substitution.

Q: Does the higher transition frequency of the PDTC143ZQB-QZ affect circuit operation?

A: No. The transition frequency specification represents the maximum frequency at which the transistor maintains specified gain. A higher transition frequency (230 MHz versus 180 MHz) indicates improved high-frequency performance and does not degrade operation at lower frequencies. All other electrical parameters remain identical.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PDTC143ZQBZ and PDTC143ZQB-QZ are ROHS3 compliant and REACH unaffected. Both carry moisture sensitivity level 1 (unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: Why should new designs use the PDTC143ZQB-QZ?

A: The PDTC143ZQB-QZ is in active production with automotive-grade qualification, ensuring long-term supply availability and enhanced process control. The PDTC143ZQBZ is obsolete and subject to supply discontinuation. New designs should specify the PDTC143ZQB-QZ to ensure component availability throughout the product lifecycle.

Q: Are there any electrical performance differences in practical applications?

A: No. Both parts meet identical electrical specifications for collector current, breakdown voltage, current gain, saturation voltage, and cutoff current. The transition frequency difference does not affect operation in standard switching applications. Circuit behavior and performance are equivalent.