PDTC124XQBZ Equivalent & Substitute Parts

Part Overview

The PDTC124XQBZ is a pre-biased PNP bipolar junction transistor manufactured by Nexperia USA Inc. in a 3-XDFN surface mount package with wettable flank. This device is rated for 50 V collector-emitter breakdown voltage and 100 mA maximum collector current, with integrated base and emitter-base resistors for simplified circuit implementation.

The PDTC124XQBZ carries an Obsolete product status. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production builds and ongoing support of existing applications.

Substiute Parts

PDTC124XQBZ

Nexperia USA Inc.In Stock: 5917PDTC124XQBZ Datasheet

Current PartRFQ

PDTC124XQB-QZ

Nexperia USA Inc.In Stock: 5878PDTC124XQB-QZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDTC124XQBZ requires evaluation of the following critical parameters that define functional equivalence:

Electrical Parameters:

• Maximum collector current (100 mA)
• Collector-emitter breakdown voltage (50 V)
• Integrated base resistor value (22 kOhms)
• Integrated emitter-base resistor value (47 kOhms)
• DC current gain minimum specification (80 @ 5mA, 5V)
• Maximum saturation voltage (100 mV @ specified bias conditions)
• Maximum collector cutoff current (100 nA)
• Power dissipation rating (340 mW)

Mechanical Parameters:

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

Compliance Parameters:

• RoHS3 compliance
• REACH unaffected status
• ECCN classification: EAR99

The PDTC124XQB-QZ is identified as a manufacturer-recommended substitute. While this part maintains identical electrical ratings, package configuration, and compliance certifications, it differs in transistor polarity (NPN versus PNP) and product status (Active versus Obsolete). This substitution is valid only for applications where NPN polarity is functionally acceptable within the circuit design.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (PNP Polarity Required):

The PDTC124XQBZ is classified as Obsolete. No direct PNP equivalent with identical product status is provided in the substitute list. Component sourcing from existing inventory or alternative manufacturers may be required for applications where PNP polarity is mandatory.

For Polarity-Flexible Applications (NPN Acceptable):

The PDTC124XQB-QZ is the manufacturer-recommended substitute and carries Active product status. This part is qualified to AEC-Q101 automotive standards and features improved moisture sensitivity rating (MSL 1 versus MSL 3). The transition frequency is higher (230 MHz versus 180 MHz), providing enhanced high-frequency performance. Both parts maintain identical electrical ratings for collector current, breakdown voltage, integrated resistor values, and power dissipation. Both are ROHS3 compliant and REACH unaffected.

Selection of PDTC124XQB-QZ is appropriate for new designs and production builds where circuit topology permits NPN substitution for the original PNP configuration.

Frequently Asked Questions (FAQ)

Q: Can PDTC124XQB-QZ directly replace PDTC124XQBZ in existing designs?

A: Direct replacement is possible only if the circuit design accommodates NPN transistor polarity. The two parts are electrically equivalent in terms of current, voltage, and power ratings, but differ in transistor type (NPN versus PNP). Circuit topology modifications are required if PNP polarity is essential to the application.

Q: What is the significance of the Obsolete product status for PDTC124XQBZ?

A: Obsolete status indicates the part is no longer in active production. Existing inventory may be available from authorized distributors, but long-term availability is not guaranteed. For new designs and ongoing production, selection of an Active product such as PDTC124XQB-QZ is recommended.

Q: Are the package and mounting specifications identical between these parts?

A: Yes. Both PDTC124XQBZ and PDTC124XQB-QZ use the 3-XDFN Exposed Pad package with surface mount, wettable flank configuration. The supplier device package designation is DFN1110D-3 for both parts. PCB layout and assembly processes are compatible.

Q: What is the difference in Moisture Sensitivity Level (MSL) between these parts?

A: PDTC124XQBZ carries MSL 3 (168 hours), while PDTC124XQB-QZ carries MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and eliminates the requirement for bake-out procedures prior to reflow soldering. PDTC124XQB-QZ offers improved handling and storage flexibility.

Q: Does PDTC124XQB-QZ meet automotive qualification requirements?

A: Yes. PDTC124XQB-QZ is qualified to AEC-Q101 automotive standards and carries Automotive grade designation. PDTC124XQBZ does not carry automotive qualification. If automotive compliance is required, PDTC124XQB-QZ is the appropriate selection.

Q: Are there differences in electrical performance between these parts?

A: Electrical ratings for collector current (100 mA), breakdown voltage (50 V), current gain (80 minimum), and power dissipation (340 mW) are identical. Transition frequency differs: PDTC124XQBZ operates at 180 MHz, while PDTC124XQB-QZ operates at 230 MHz. The higher transition frequency of PDTC124XQB-QZ provides enhanced performance in high-frequency applications.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both PDTC124XQBZ and PDTC124XQB-QZ are ROHS3 compliant and REACH unaffected. Both carry ECCN classification EAR99 and HTSUS code 8541.21.0075.