PDTC124EQCZ Equivalent & Substitute Parts

Part Overview

The PDTC124EQCZ is a pre-biased NPN 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 (22 kOhms each) for simplified circuit design in switching and amplification applications. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Pre-Biased	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	22	kOhms
Resistor - Emitter Base (R2)	22	kOhms
DC Current Gain (hFE) Min @ Ic, Vce	60 @ 5mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	100	mV @ 500µA, 10mA
Current - Collector Cutoff (Max)	100	nA
Frequency - Transition	230	MHz
Power - Max	360	mW
Mounting Type	Surface Mount, Wettable Flank	—
Package / Case	3-XDFN Exposed Pad	—
Supplier Device Package	DFN1412D-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the PDTC124EQCZ is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Transistor type: NPN - Pre-Biased configuration
Maximum collector current: 100 mA
Collector-emitter breakdown voltage: 50 V
Internal base resistor (R1): 22 kOhms
Internal emitter-base resistor (R2): 22 kOhms
DC current gain (hFE): 60 minimum at specified conditions
Saturation voltage: 100 mV maximum at specified conditions
Transition frequency: 230 MHz
Maximum power dissipation: 360 mW

Mechanical Equivalence Criteria:

Package type: 3-XDFN with exposed pad (DFN1412D-3)
Mounting: Surface mount with wettable flank
Moisture sensitivity: MSL 1 (Unlimited)

Compliance Equivalence Criteria:

RoHS3 compliance
REACH unaffected status

The substitute part PDTC124EQC-QZ meets all electrical, mechanical, and compliance parameters while offering active product status and automotive-grade qualification.

Parameter Comparison

Parameter	PDTC124EQCZ (Main)	PDTC124EQC-QZ (Substitute)	Match
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	✓
Transistor Type	NPN - Pre-Biased	NPN - Pre-Biased	✓
Current - Collector (Ic) Max	100 mA	100 mA	✓
Voltage - Collector Emitter Breakdown (Max)	50 V	50 V	✓
Resistor - Base (R1)	22 kOhms	22 kOhms	✓
Resistor - Emitter Base (R2)	22 kOhms	22 kOhms	✓
DC Current Gain (hFE) Min @ Ic, Vce	60 @ 5mA, 5V	60 @ 5mA, 5V	✓
Vce Saturation (Max) @ Ib, Ic	100 mV @ 500µA, 10mA	100 mV @ 500µA, 10mA	✓
Current - Collector Cutoff (Max)	100 nA	100 nA	✓
Frequency - Transition	230 MHz	230 MHz	✓
Power - Max	360 mW	360 mW	✓
Mounting Type	Surface Mount, Wettable Flank	Surface Mount, Wettable Flank	✓
Package / Case	3-XDFN Exposed Pad	3-XDFN Exposed Pad	✓
Supplier Device Package	DFN1412D-3	DFN1412D-3	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	✓
Product Status	Obsolete	Active	—
Qualification	—	AEC-Q101	—

Engineering Selection Recommendations

The PDTC124EQC-QZ is the direct equivalent substitute for the obsolete PDTC124EQCZ. Both parts are manufactured by Nexperia USA Inc. and share identical electrical specifications, internal resistor values, and mechanical packaging.

Selection Basis:

The PDTC124EQC-QZ is recommended for new designs and production continuity because it maintains active product status while providing full electrical and mechanical compatibility. The substitute part carries AEC-Q101 automotive qualification, which extends its applicability to automotive-grade applications where the original part may have been used.

Both parts comply with RoHS3 requirements and maintain REACH unaffected status. The identical DFN1412D-3 package with wettable flank ensures direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can PDTC124EQC-QZ be used as a direct replacement for PDTC124EQCZ in existing designs?

A: Yes. The PDTC124EQC-QZ is electrically and mechanically identical to the PDTC124EQCZ. All electrical parameters, internal resistor values, and package specifications match exactly. No circuit modifications or PCB layout changes are required.

Q: What is the primary difference between these two parts?

A: The PDTC124EQCZ is obsolete, while the PDTC124EQC-QZ maintains active product status. Additionally, the substitute part carries AEC-Q101 automotive qualification. All functional and electrical characteristics are identical.

Q: Are the packages physically identical?

A: Yes. Both parts use the 3-XDFN package (DFN1412D-3) with exposed pad and wettable flank. Pin configuration, footprint, and solder pad layout are identical.

Q: Does the AEC-Q101 qualification on the substitute part affect compatibility?

A: No. AEC-Q101 qualification indicates the part meets automotive-grade reliability standards. This qualification does not alter electrical performance or package specifications and does not restrict use in non-automotive applications.

Q: Are there any moisture sensitivity differences?

A: No. Both parts have MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture control requirements during storage or handling.

Q: Can the substitute part be used in high-frequency applications?

A: Yes. The transition frequency of 230 MHz is identical in both parts, supporting the same high-frequency switching and amplification applications.

Q: What is the maximum power dissipation for this transistor?

A: The maximum power dissipation is 360 mW for both the original and substitute parts. Thermal design considerations remain unchanged.

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