MJD112RL Equivalent & Substitute Parts

Part Overview

The MJD112RL is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for surface mount applications in the DPAK package. This device is rated for 100 V collector-emitter breakdown voltage with a maximum collector current of 2 A and maximum power dissipation of 1.75 W. The MJD112RL is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility while offering current product availability and compliance status.

Substiute Parts

MJD112RL

onsemiIn Stock: 3374MJD112RL Datasheet

Current PartRFQ

MJD112RLG

onsemiIn Stock: 727MJD112RLG Datasheet

DirectRFQ

MJD112T4

STMicroelectronicsIn Stock: 25943MJD112T4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MJD112RL are selected based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• 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
• Frequency - Transition: 25 MHz
• Operating Temperature Range: -65°C to 150°C (TJ)

Mechanical Parameters (Must Match):

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

All identified substitute parts meet these criteria. Variations in power dissipation rating and product status are noted but do not preclude substitution when electrical and mechanical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

MJD112RLG (onsemi) is the primary substitute for the MJD112RL. This part maintains identical electrical and mechanical specifications while offering active product status. The MJD112RLG is ROHS3 compliant, addressing regulatory requirements that the obsolete MJD112RL does not meet. Packaging is available in Cut Tape (CT) and Digi-Reel® formats with 687 units in current inventory.

MJD112T4 (STMicroelectronics) is an alternative substitute manufactured by STMicroelectronics. All critical electrical parameters and mechanical specifications match the MJD112RL. The MJD112T4 features a higher maximum power dissipation rating of 20 W compared to 1.75 W for the original part, providing additional thermal margin in applications. This part is ROHS3 compliant and maintains active product status with 25,844 units in inventory. The operating temperature specification lists only the maximum junction temperature (150°C) without the minimum value, representing a minor documentation difference that does not affect substitution eligibility.

Both substitute parts are suitable for direct replacement in applications currently using the MJD112RL. Selection between MJD112RLG and MJD112T4 depends on manufacturer preference, supply chain considerations, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the MJD112RLG directly replace the MJD112RL in existing designs?

A: Yes. The MJD112RLG maintains identical electrical specifications including collector current (2 A), breakdown voltage (100 V), saturation voltage, current gain, and transition frequency. The package, mounting type, and pin configuration are identical. The primary difference is product status (active versus obsolete) and RoHS compliance.

Q: What is the difference between MJD112RLG and MJD112T4?

A: Both parts meet all electrical and mechanical substitution criteria. The MJD112T4 is manufactured by STMicroelectronics rather than onsemi and features a higher power dissipation rating (20 W versus 1.75 W). The operating temperature specification for MJD112T4 lists only the maximum junction temperature. All critical electrical parameters are identical.

Q: Are there any package compatibility issues between these parts?

A: No. All three parts use the TO-252-3 DPAK package with identical pin configuration and mechanical dimensions. Surface mount assembly processes require no modification.

Q: Why is the MJD112RL classified as obsolete?

A: The MJD112RL is listed as obsolete by onsemi. Active equivalent parts (MJD112RLG and MJD112T4) are available for new designs and production continuity.

Q: Does RoHS compliance affect substitution?

A: RoHS compliance is a regulatory and supply chain consideration. The MJD112RLG and MJD112T4 are both ROHS3 compliant, while the MJD112RL is not. For applications subject to RoHS requirements, the compliant substitutes are necessary. For legacy systems without RoHS mandates, compliance status does not affect electrical performance.

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

A: All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use MJD112T4 in applications with strict thermal requirements?

A: The MJD112T4 has a higher power dissipation rating (20 W) than the original MJD112RL (1.75 W), providing additional thermal headroom. This does not preclude use in applications designed for the lower power rating; it simply provides additional margin.