MJD117RLG Equivalent & Substitute Parts

Part Overview

The MJD117RLG is a PNP Darlington bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 2 A maximum collector current. The device is packaged in a Surface Mount DPAK (TO-252-3) configuration and is designed for general-purpose switching and amplification applications requiring moderate power dissipation.

The MJD117RLG is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, field repairs, and design continuity where this part number is specified.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Darlington	—
Current - Collector (Ic) (Max)	2	A
Voltage - Collector Emitter Breakdown (Max)	100	V
Vce Saturation (Max) @ Ib, Ic	3 V @ 40 mA, 4 A	—
Current - Collector Cutoff (Max)	20	µA
DC Current Gain (hFE) (Min) @ Ic, Vce	1000 @ 2 A, 3 V	—
Power - Max	1.75	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	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MJD117RLG is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

Transistor Type: PNP - Darlington configuration
Maximum Collector Current (Ic): 2 A
Collector-Emitter Breakdown Voltage: 100 V
DC Current Gain (hFE): 1000 minimum at specified conditions
Saturation Voltage (Vce): 3 V at specified bias conditions
Package Type: Surface Mount DPAK (TO-252-3)
Mounting Configuration: Surface Mount

All identified substitute parts maintain these core electrical specifications and physical package compatibility. Variations in maximum power dissipation rating and product status (active versus obsolete) do not affect functional substitutability in applications designed for the MJD117RLG electrical envelope.

Parameter Comparison

Parameter	MJD117RLG (onsemi)	MJD117T4G (onsemi)	NJVMJD117T4G (onsemi)	MJD117T4 (STMicroelectronics)
Product Status	Obsolete	Active	Obsolete	Active
Transistor Type	PNP - Darlington	PNP - Darlington	PNP - Darlington	PNP - 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	3 V @ 40 mA, 4 A	3 V @ 40 mA, 4 A	3 V @ 40 mA, 4 A	3 V @ 40 mA, 4 A
Current - Collector Cutoff (Max)	20 µA	20 µA	20 µA	20 µA
DC Current Gain (hFE) (Min) @ Ic, Vce	1000 @ 2 A, 3 V	1000 @ 2 A, 3 V	1000 @ 2 A, 3 V	1000 @ 2 A, 3 V
Power - Max	1.75 W	1.75 W	1.75 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)	150 °C (TJ)
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: MJD117T4G (onsemi)

The MJD117T4G is the preferred substitute for the obsolete MJD117RLG. This part maintains identical electrical specifications and package configuration while offering active product status. The MJD117T4G is ROHS3 compliant and available in standard Cut Tape and Digi-Reel packaging formats, supporting both prototype and production volume requirements.

Secondary Recommendation: MJD117T4 (STMicroelectronics)

The MJD117T4 from STMicroelectronics provides an alternative source for the same functional specification. This part is active and ROHS3 compliant. The maximum power dissipation rating is 20 W, which exceeds the original 1.75 W specification and provides additional thermal margin in applications. The operating temperature range specification differs (150 °C maximum versus -65 to 150 °C range), which may affect suitability in extended temperature applications.

Tertiary Option: NJVMJD117T4G (onsemi)

The NJVMJD117T4G maintains complete electrical and mechanical equivalence to the MJD117RLG and is ROHS3 compliant. However, this part is classified as obsolete, limiting its long-term availability for production applications.

Selection Criteria

For new designs and ongoing production: Select MJD117T4G (onsemi)
For applications requiring extended low-temperature operation below -65 °C: Verify MJD117T4 (STMicroelectronics) operating range requirements
For inventory continuity with existing supply chains: Confirm availability and lead times with authorized distributors

Frequently Asked Questions (FAQ)

Q: Can MJD117T4G be used as a direct replacement for MJD117RLG in existing circuit designs?

A: Yes. The MJD117T4G maintains identical electrical specifications (2 A collector current, 100 V breakdown voltage, 1000 hFE minimum gain) and identical DPAK Surface Mount package configuration. No circuit modifications are required.

Q: What is the difference between MJD117T4G and MJD117T4?

A: Both parts meet the core electrical specifications for the MJD117RLG. The primary differences are manufacturer (onsemi versus STMicroelectronics) and maximum power dissipation rating (1.75 W versus 20 W). The MJD117T4 also specifies a maximum operating temperature of 150 °C rather than a -65 to 150 °C range. For applications operating at the lower temperature extreme, verify the MJD117T4 datasheet specifications.

Q: Is ROHS3 compliance required for my application?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other regulated markets. The MJD117T4G and MJD117T4 are both ROHS3 compliant. The original MJD117RLG does not specify ROHS status. If ROHS compliance is a requirement, select MJD117T4G or MJD117T4.

Q: What is the significance of the "Obsolete" product status?

A: Obsolete status indicates that the manufacturer has discontinued production and support for the part. The MJD117RLG and NJVMJD117T4G are both obsolete. For new production and long-term supply security, use MJD117T4G (active status) or MJD117T4 (active status).

Q: Are there packaging format differences between these parts?

A: All substitute parts use the same Surface Mount DPAK (TO-252-3) package. Packaging format options differ: MJD117T4G is available in Cut Tape and Digi-Reel formats, while MJD117RLG and NJVMJD117T4G do not specify packaging format details. Confirm packaging availability with your distributor based on production volume requirements.

Q: What is the Moisture Sensitivity Level (MSL) rating, and why does it matter?

A: All parts in this comparison carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly. Standard surface mount assembly processes are appropriate.

Q: Can I use MJD117T4 in place of MJD117T4G?

A: Yes, from an electrical and package perspective. Both parts meet the core specifications. However, MJD117T4 is manufactured by STMicroelectronics while MJD117T4G is manufactured by onsemi. Verify that your supply chain, quality agreements, and design documentation support cross-manufacturer substitution before implementation.

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