MJD122RLG Equivalent & Substitute Parts

Part Overview

The MJD122RLG is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for surface mount applications in the DPAK package. This component operates at 100 V collector-emitter breakdown voltage with a maximum collector current of 8 A and maximum power dissipation of 1.75 W. The MJD122RLG is classified as obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts with identical electrical and mechanical specifications ensure functional compatibility in existing circuit designs.

Substiute Parts

MJD122RLG

onsemiIn Stock: 944MJD122RLG Datasheet

Current PartRFQ

MJD122T4G

onsemiIn Stock: 65203MJD122T4G Datasheet

Parametric EquivalentRFQ

NJVMJD122T4G

onsemiIn Stock: 20437NJVMJD122T4G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MJD122RLG are determined by equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters:

Electrical Parameters:

• Transistor Type: NPN - Darlington configuration
• Maximum Collector Current (Ic): 8 A
• Collector-Emitter Breakdown Voltage: 100 V
• Vce Saturation: 4V @ 80mA, 8A
• Collector Cutoff Current: 10 µA
• DC Current Gain (hFE): 1000 @ 4A, 4V
• Maximum Power Dissipation: 1.75 W
• Transition Frequency: 4 MHz
• Operating Temperature Range: -65°C to 150°C

Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Moisture Sensitivity Level: 1 (Unlimited)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical specifications and package configuration, ensuring direct functional replacement in circuit designs. Packaging format variations (Cut Tape, Digi-Reel, or Tape & Reel) do not affect electrical performance or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

MJD122T4G is an active product status equivalent suitable for direct replacement in standard industrial and commercial applications. This part maintains identical electrical and mechanical specifications to the obsolete MJD122RLG, with the advantage of current manufacturing availability and active product support from onsemi. The MJD122T4G is supplied in Cut Tape and Digi-Reel packaging formats, providing flexibility for both prototype and production volume requirements.

NJVMJD122T4G is an automotive-grade equivalent qualified to AEC-Q101 standards. This part is appropriate for applications requiring automotive-level reliability and traceability. The NJVMJD122T4G maintains all electrical and mechanical specifications identical to the MJD122RLG while providing enhanced qualification documentation and supply chain support for automotive and mission-critical applications. This part is supplied in Tape & Reel packaging format.

Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Selection between MJD122T4G and NJVMJD122T4G depends on application requirements: standard industrial use favors MJD122T4G, while automotive or high-reliability applications favor NJVMJD122T4G.

Frequently Asked Questions (FAQ)

Q: Can MJD122T4G be used as a direct replacement for MJD122RLG?

A: Yes. MJD122T4G is a parametric equivalent with identical electrical specifications (8 A collector current, 100 V breakdown voltage, 1.75 W power dissipation, 4 MHz transition frequency) and mechanical configuration (DPAK surface mount package). The primary difference is product status: MJD122RLG is obsolete while MJD122T4G is active.

Q: What is the difference between MJD122T4G and NJVMJD122T4G?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. NJVMJD122T4G is automotive-grade and qualified to AEC-Q101 standards, making it suitable for automotive and high-reliability applications. MJD122T4G is standard industrial grade. Packaging differs: MJD122T4G is supplied in Cut Tape or Digi-Reel format, while NJVMJD122T4G is supplied in Tape & Reel format.

Q: Are the DPAK packages identical across all three parts?

A: Yes. All three parts use the TO-252-3 DPAK package (2 Leads + Tab, SC-63 designation). The package footprint, pin configuration, and thermal characteristics are identical, ensuring direct PCB compatibility without layout modifications.

Q: Do all substitute parts meet RoHS and REACH compliance?

A: Yes. MJD122RLG, MJD122T4G, and NJVMJD122T4G are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for commercial and industrial applications.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special moisture control requirements.

Q: Can NJVMJD122T4G be used in non-automotive applications?

A: Yes. NJVMJD122T4G maintains identical electrical and mechanical specifications to the standard-grade equivalents and can be used in any application where MJD122RLG or MJD122T4G would be appropriate. The automotive qualification is an additional feature that does not restrict use in other applications.

Q: What inventory levels are available for each substitute part?

A: MJD122T4G has 65,100 pieces in stock. NJVMJD122T4G has 20,400 pieces in stock. Both parts are actively manufactured by onsemi with established supply chains.