MJD31CUQ-13 Equivalent & Substitute Parts

Part Overview

The MJD31CUQ-13 is an NPN bipolar junction transistor manufactured by Diodes Incorporated, rated for 100 V collector-emitter breakdown voltage and 3 A maximum collector current. This surface mount device in TO-252 (DPAK) packaging is designed for general-purpose switching and amplification applications. The part is currently active in production with automotive-grade qualification (AEC-Q101) and is RoHS3 compliant.

Equivalent and substitute parts are necessary when the original MJD31CUQ-13 becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from multiple suppliers is needed to ensure supply chain continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	3	A
Power - Max	1.6	W
Frequency - Transition	3	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	TO-252-3, DPAK	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the MJD31CUQ-13 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 100 V
Current - Collector (Ic) (Max): 3 A
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Acceptable Variations:

Packaging format (Tape & Reel, Tube, Cut Tape) does not affect electrical compatibility
Manufacturer may differ
Operating temperature range may extend beyond the original specification
Vce Saturation and DC Current Gain may vary within acceptable limits for the application class
Frequency - Transition may exceed the original specification

Substitute parts are grouped into three categories based on their relationship to the main part: Upgrade Substitutes (alternative manufacturers with equivalent or improved specifications), Manufacturer Recommended Substitutes (direct alternatives from the original or qualified manufacturers), and Parametric Equivalents (parts with matching electrical characteristics from alternative manufacturers).

Parameter Comparison

Parameter	MJD31CUQ-13	NJVMJD31CG	NJVMJD31CRLG	MJD31CG	MJD31CRLG	MJD31CT4G	MJD31CAJ	MJD31CJ
Manufacturer	Diodes Inc.	onsemi	onsemi	onsemi	onsemi	onsemi	Nexperia	Nexperia
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Ic (Max)	3 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A
Vce Breakdown (Max)	100 V	100 V	100 V	100 V	100 V	100 V	100 V	100 V
Power - Max	1.6 W	1.56 W	1.56 W	1.56 W	1.56 W	1.56 W	1.6 W	1.6 W
Frequency - Transition	3 MHz	3 MHz	3 MHz	3 MHz	3 MHz	3 MHz	3 MHz	3 MHz
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C	150°C	150°C	150°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Manufacturer Recommended):

The onsemi MJD31CG, MJD31CRLG, and MJD31CT4G parts are direct manufacturer-recommended alternatives. These parts maintain identical electrical specifications to the MJD31CUQ-13 across all critical parameters: 100 V breakdown voltage, 3 A collector current, and 3 MHz transition frequency. All three are active products with RoHS3 compliance. Selection between these three depends on packaging format requirements: MJD31CG is supplied in Tube packaging, MJD31CRLG in Cut Tape & Digi-Reel format, and MJD31CT4G in Cut Tape & Digi-Reel format with the highest inventory availability (35,200 pieces).

Secondary Substitutes (Upgrade Alternatives):

The onsemi NJVMJD31CG and NJVMJD31CRLG parts provide equivalent electrical performance with extended lower operating temperature range (-65°C versus -55°C). These parts are active products with RoHS3 compliance. NJVMJD31CG is supplied in Tube packaging with 5,325 pieces in stock, while NJVMJD31CRLG is supplied in Tape & Reel format with 7,800 pieces in stock.

Parametric Equivalents (Alternative Manufacturers):

The Nexperia MJD31CAJ and MJD31CJ parts provide parametric equivalence with automotive-grade qualification (AEC-Q101) matching the original MJD31CUQ-13. Both maintain 1.6 W maximum power rating and 25 minimum DC current gain at specified conditions. MJD31CAJ is supplied in Tape & Reel format with 7,571 pieces in stock. MJD31CJ is supplied in Tape & Reel format with 8,046 pieces in stock. Both are active products with RoHS3 compliance.

Obsolete Reference (Not Recommended for New Designs):

The NSV1C301ET4G-VF01 and 2SD1815T-TL-E parts are listed as obsolete and should not be selected for new designs or long-term production applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the MJD31CUQ-13 with any of the listed alternatives without circuit modification?

A: Yes. All listed active substitute parts maintain the critical electrical parameters: 100 V collector-emitter breakdown voltage, 3 A maximum collector current, and 3 MHz transition frequency. The TO-252 (DPAK) package is identical across all alternatives, ensuring mechanical and thermal compatibility. No circuit modifications are required.

Q: What is the difference between the onsemi MJD31CG and MJD31CT4G parts?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: MJD31CG is supplied in Tube packaging, while MJD31CT4G is supplied in Cut Tape & Digi-Reel format. MJD31CT4G has significantly higher inventory availability (35,200 pieces versus 29,245 pieces for MJD31CG). Selection depends on your manufacturing process requirements.

Q: Are the Nexperia MJD31CAJ and MJD31CJ parts suitable for automotive applications?

A: Yes. Both Nexperia parts carry automotive-grade qualification (AEC-Q101), matching the original MJD31CUQ-13. These parts are suitable for automotive applications and maintain RoHS3 compliance.

Q: What is the significance of the extended operating temperature range in the onsemi NJVMJD31CG and NJVMJD31CRLG parts?

A: The onsemi parts extend the lower operating temperature limit to -65°C compared to -55°C for the original MJD31CUQ-13. This extended range provides additional design margin for applications operating in extreme cold environments. The upper temperature limit remains 150°C. This is a beneficial characteristic that does not restrict substitution.

Q: Can I use the NSV1C301ET4G-VF01 as a substitute?

A: The NSV1C301ET4G-VF01 is listed as obsolete and is not recommended for new designs or production applications. Although it maintains the required 100 V breakdown voltage and 3 A collector current, its obsolete status creates supply chain risk. Use active alternatives instead.

Q: What packaging formats are available for the MJD31 series substitutes?

A: Available packaging formats include Tape & Reel (TR), Tube, and Cut Tape (CT) & Digi-Reel. All formats contain the same TO-252 (DPAK) component package. Selection depends on your assembly equipment and production volume requirements. Tape & Reel and Cut Tape formats are typically used for automated pick-and-place assembly, while Tube packaging is used for manual assembly or lower-volume applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed in this reference are RoHS3 compliant, matching the compliance status of the original MJD31CUQ-13.

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