MJD112T4G Equivalent & Substitute Parts

Part Overview

The MJD112T4G is an NPN Darlington bipolar junction transistor manufactured by onsemi, classified as an active product. This surface mount device in DPAK packaging is designed for applications requiring moderate current switching and amplification at collector currents up to 2 A and voltages up to 100 V. The part is supplied in Cut Tape (CT) and Digi-Reel® packaging formats. Equivalent and substitute parts are identified to address supply chain requirements, packaging format preferences, and manufacturing source alternatives while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Current - Collector (Ic) (Max)	2	A
Voltage - Collector Emitter Breakdown (Max)	100	V
Vce Saturation (Max) @ Ib, Ic	3V @ 40mA, 4A	—
Current - Collector Cutoff (Max)	20	µA
DC Current Gain (hFE) (Min) @ Ic, Vce	1000 @ 2A, 3V	—
Power - Max	20	W
Frequency - Transition	25	MHz
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MJD112T4G is determined by electrical and mechanical parameter equivalence within the NPN Darlington transistor category. The critical parameters governing substitution are: collector current rating (2 A maximum), collector-emitter breakdown voltage (100 V maximum), DC current gain (1000 minimum at specified conditions), saturation voltage characteristics, transition frequency (25 MHz), power dissipation capability, and DPAK surface mount package compatibility.

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Packaging Variant): NJVMJD112G differs from the main part only in packaging format (Tube versus Cut Tape & Digi-Reel®) and power rating (1.75 W versus 20 W). This part maintains identical electrical specifications for collector current, voltage, gain, and frequency characteristics.

Parametric Equivalents (Packaging and Source Variants): NJVMJD112T4G and MJD112T4 maintain full electrical equivalence to the main part, including 20 W power rating and all switching characteristics. NJVMJD112T4G differs in packaging (Tape & Reel versus Cut Tape & Digi-Reel®) and manufacturer source (onsemi). MJD112T4 is sourced from STMicroelectronics with identical electrical specifications but represents a cross-manufacturer alternative.

Parameter Comparison

Parameter	MJD112T4G (Main)	NJVMJD112G	NJVMJD112T4G	MJD112T4
Manufacturer	onsemi	onsemi	onsemi	STMicroelectronics
Transistor Type	NPN - Darlington	NPN - Darlington	NPN - Darlington	NPN - Darlington
Current - Collector (Ic) (Max)	2 A	2 A	2 A	2 A
Voltage - Collector Emitter Breakdown (Max)	100 V	100 V	100 V	100 V
Vce Saturation (Max) @ Ib, Ic	3V @ 40mA, 4A	3V @ 40mA, 4A	3V @ 40mA, 4A	3V @ 40mA, 4A
Current - Collector Cutoff (Max)	20 µA	20 µA	20 µA	20 µA
DC Current Gain (hFE) (Min) @ Ic, Vce	1000 @ 2A, 3V	1000 @ 2A, 3V	1000 @ 2A, 3V	1000 @ 2A, 3V
Power - Max	20 W	1.75 W	20 W	20 W
Frequency - Transition	25 MHz	25 MHz	25 MHz	25 MHz
Operating Temperature Range	-65 to 150 °C (TJ)	-65 to 150 °C (TJ)	-65 to 150 °C (TJ)	-65 to 150 °C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with current manufacturing standards. The selection of a substitute part depends on specific application requirements and supply chain constraints:

NJVMJD112G is suitable for applications where power dissipation requirements do not exceed 1.75 W and where Tube packaging format is acceptable. This part is electrically equivalent in all switching and gain characteristics but operates at reduced maximum power rating.

NJVMJD112T4G provides full electrical equivalence to the main part with identical 20 W power rating and is preferred when Tape & Reel packaging format is required for automated assembly processes. This part is sourced from onsemi, maintaining manufacturer consistency.

MJD112T4 is a cross-manufacturer alternative from STMicroelectronics that maintains complete electrical equivalence, including 20 W power rating and all switching characteristics. This part is suitable for applications requiring manufacturing source diversification or when STMicroelectronics supply chain availability is prioritized.

All substitute parts are compatible with the same PCB footprint and thermal management requirements as the main part due to identical DPAK packaging specifications. Moisture sensitivity level remains at MSL 1 (Unlimited) across all variants, eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can NJVMJD112G be used as a direct replacement for MJD112T4G?

A: NJVMJD112G is electrically equivalent in all switching and amplification characteristics. However, the maximum power dissipation rating is 1.75 W compared to 20 W for the main part. Substitution is valid only if the application circuit does not require power dissipation exceeding 1.75 W. Packaging format differs (Tube versus Cut Tape & Digi-Reel®).

Q: What is the difference between NJVMJD112T4G and MJD112T4?

A: Both parts are parametric equivalents with identical electrical specifications and 20 W power rating. The primary difference is manufacturer source: NJVMJD112T4G is manufactured by onsemi, while MJD112T4 is manufactured by STMicroelectronics. Packaging format also differs: NJVMJD112T4G uses Tape & Reel format, while MJD112T4 uses Cut Tape & Digi-Reel® format.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use the TO-252-3 DPAK package with identical pin configuration and thermal tab specifications. PCB footprint, land pattern, and thermal management design remain unchanged across all variants.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Cut Tape & Digi-Reel®, Tube, or Tape & Reel) affects only handling, storage, and assembly processes. Electrical characteristics, including collector current, voltage rating, gain, and frequency response, are independent of packaging format.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry identical REACH Unaffected status. Moisture sensitivity level is MSL 1 (Unlimited) for all variants, eliminating moisture-related storage and handling requirements.

Q: Which substitute part should be selected for high-volume automated assembly?

A: NJVMJD112T4G is optimized for high-volume automated assembly due to Tape & Reel packaging format, which is standard for pick-and-place equipment. This part maintains full electrical equivalence and 20 W power rating.

Q: Can MJD112T4 from STMicroelectronics be used in applications originally designed for onsemi MJD112T4G?

A: Yes. MJD112T4 maintains complete electrical equivalence in collector current, voltage rating, DC current gain, saturation voltage, and transition frequency. Cross-manufacturer substitution is valid from an electrical standpoint. Verify component availability and lead time requirements with your supplier.

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