MJD148-QJ Equivalent & Substitute Parts

Part Overview

The MJD148-QJ is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the TO-252-3 DPAK package. This component operates at a maximum collector current of 4 A and collector-emitter breakdown voltage of 45 V, with a maximum power dissipation of 1.6 W. The device is classified as Automotive grade and holds AEC-Q100 qualification. The MJD148-QJ is currently in active production status. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	4	A
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	500mV @ 200mA, 2A	—
Current - Collector Cutoff (Max)	1	µA
DC Current Gain (hFE) (Min) @ Ic, Vce	85 @ 500mA, 1V	—
Power - Max	1.6	W
Frequency - Transition	3	MHz
Operating Temperature (TJ)	150	°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	3 (168 Hours)	—

Substitute Part Grouping Explanation

Substitute parts for the MJD148-QJ are identified based on strict electrical and mechanical parameter equivalence. The substitution criteria are defined by the following key parameters:

Transistor Type: NPN configuration
Current - Collector (Ic) (Max): 4 A
Voltage - Collector Emitter Breakdown (Max): 45 V
Vce Saturation (Max) @ Ib, Ic: 500mV @ 200mA, 2A
Current - Collector Cutoff (Max): 1 µA
DC Current Gain (hFE) (Min) @ Ic, Vce: 85 @ 500mA, 1V
Power - Max: 1.6 W
Frequency - Transition: 3 MHz
Operating Temperature (TJ): 150°C
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 3 (168 Hours)

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	MJD148-QJ	MJD148J	Match
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	✓
Category	Transistors, Bipolar (BJT)	Transistors, Bipolar (BJT)	✓
Transistor Type	NPN	NPN	✓
Current - Collector (Ic) (Max)	4 A	4 A	✓
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	✓
Vce Saturation (Max) @ Ib, Ic	500mV @ 200mA, 2A	500mV @ 200mA, 2A	✓
Current - Collector Cutoff (Max)	1 µA	1 µA	✓
DC Current Gain (hFE) (Min) @ Ic, Vce	85 @ 500mA, 1V	85 @ 500mA, 1V	✓
Power - Max	1.6 W	1.6 W	✓
Frequency - Transition	3 MHz	3 MHz	✓
Operating Temperature (TJ)	150°C	150°C	✓
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Active	Active	✓

Engineering Selection Recommendations

The MJD148J is a direct parametric equivalent to the MJD148-QJ. Both components are manufactured by Nexperia USA Inc. and share identical electrical specifications, mechanical packaging, and compliance certifications. Both parts are active in production status and maintain ROHS3 compliance and REACH unaffected status.

Selection between MJD148-QJ and MJD148J is based on availability and supply chain requirements. The MJD148J currently maintains higher inventory levels (7021 Pcs) compared to the MJD148-QJ (3020 Pcs). Both parts are suitable for automotive applications requiring AEC-Q100 qualified components, though the MJD148-QJ carries explicit Automotive grade designation in the provided data.

No electrical or mechanical redesign is required when substituting between these parts. PCB layout, thermal management, and circuit design parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can MJD148J be used as a direct replacement for MJD148-QJ?

A: Yes. The MJD148J meets all electrical and mechanical parameters specified for the MJD148-QJ, including collector current rating (4 A), breakdown voltage (45 V), power dissipation (1.6 W), saturation voltage characteristics, and package configuration (TO-252-3 DPAK). Both components are manufactured by Nexperia USA Inc. and hold identical compliance certifications.

Q: Are there differences in automotive qualification between these parts?

A: Both parts are suitable for automotive applications. The MJD148-QJ is explicitly designated as Automotive grade with AEC-Q100 qualification. The MJD148J carries the same AEC-Q100 qualification and ROHS3 compliance status. Consult application-specific requirements and design documentation to confirm suitability for your automotive system.

Q: What is the significance of the packaging designation TO-252-3, DPAK (2 Leads + Tab), SC-63?

A: This designation specifies the surface mount package configuration. Both the MJD148-QJ and MJD148J use identical DPAK packaging with two signal leads and a thermal tab. This ensures mechanical and thermal compatibility on PCBs designed for either part number. No footprint modification is required when substituting between these parts.

Q: Does the Moisture Sensitivity Level (MSL) rating affect substitution?

A: Both parts carry MSL 3 (168 Hours) rating, indicating identical moisture handling and storage requirements. No difference in moisture sensitivity exists between the MJD148-QJ and MJD148J. Standard MSL 3 handling procedures apply to both components.

Q: Are there any differences in transition frequency or switching characteristics?

A: No. Both parts specify 3 MHz transition frequency and identical DC current gain (hFE) of 85 minimum at 500mA collector current and 1V collector-emitter voltage. Switching performance and frequency response are equivalent between the two part numbers.

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