MJE15031 PNP Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The MJE15031 is a PNP bipolar junction transistor manufactured by onsemi, rated for 150V collector-emitter breakdown voltage and 8A maximum collector current in a TO-220 through-hole package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MJE15031 serves in power switching and amplification applications requiring moderate current handling and voltage ratings within the specified operating range.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	150	V
Current - Collector (Ic) (Max)	8	A
Power - Max	50	W
Frequency - Transition	30	MHz
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—
Operating Temperature Range	-65 to 150	°C (TJ)

Substitute Part Grouping Explanation

Substitution of the MJE15031 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor polarity must be PNP
Collector-emitter breakdown voltage must be 150V or greater
Maximum collector current must be 8A or greater
Package must be TO-220-3 through-hole configuration
Operating temperature range must encompass -65°C to 150°C

Substitution Categories:

Direct Equivalent: MJE15031G matches all primary parameters identically. This part is the direct successor with active product status and improved RoHS3 compliance.

Similar Substitutes: KSA940TU and KSB546YTU share the same voltage rating (150V) and package type (TO-220-3) but have reduced maximum collector current ratings (1.5A and 2A respectively) and lower power dissipation (1.5W and 25W respectively). These parts are suitable only for applications where the 8A current requirement can be reduced or where lower power operation is acceptable.

Parameter Comparison

Parameter	MJE15031	MJE15031G	KSA940TU	KSB546YTU
Transistor Type	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	150V	150V	150V	150V
Current - Collector (Ic) (Max)	8A	8A	1.5A	2A
Power - Max	50W	50W	1.5W	25W
Frequency - Transition	30MHz	30MHz	4MHz	5MHz
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature (Max)	150°C	150°C	150°C	150°C
Product Status	Obsolete	Active	Active	Last Time Buy
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement: MJE15031G is the recommended substitute. It maintains identical electrical specifications (150V, 8A, 50W, 30MHz) and identical TO-220-3 package configuration. MJE15031G holds active product status and meets ROHS3 compliance requirements, providing superior long-term availability and regulatory alignment compared to the obsolete MJE15031.

For Current-Limited Applications: KSA940TU and KSB546YTU are suitable only when circuit design permits reduced collector current operation. KSA940TU is limited to 1.5A maximum collector current and 1.5W power dissipation. KSB546YTU supports 2A maximum collector current and 25W power dissipation. Both maintain the 150V voltage rating and TO-220-3 package. KSB546YTU carries Last Time Buy status, indicating limited future availability.

Compliance Considerations: The MJE15031 is RoHS non-compliant. All substitute parts (MJE15031G, KSA940TU, KSB546YTU) are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can MJE15031G replace MJE15031 in all applications?

A: Yes. MJE15031G is electrically and mechanically identical to MJE15031, with matching specifications for voltage (150V), current (8A), power (50W), frequency (30MHz), and package (TO-220-3). MJE15031G is the direct successor with active product status.

Q: Are KSA940TU and KSB546YTU suitable for all MJE15031 applications?

A: No. These parts have reduced maximum collector current ratings (1.5A and 2A respectively, compared to 8A for MJE15031). They are suitable only for applications where the circuit design operates at or below these current levels. Voltage rating (150V) and package type (TO-220-3) are compatible.

Q: What is the difference between MJE15031 and MJE15031G packaging?

A: MJE15031 is supplied in standard packaging, while MJE15031G is supplied in tube packaging. Both use the TO-220-3 through-hole package configuration. The tube packaging of MJE15031G provides improved handling and storage characteristics for production environments.

Q: Why is MJE15031 listed as obsolete?

A: MJE15031 has reached end-of-life status. MJE15031G is the active replacement part with identical specifications and improved compliance status.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, for the TO-220-3 package. All listed parts use identical TO-220-3 through-hole pinout and footprint. Pin compatibility is maintained across MJE15031, MJE15031G, KSA940TU, and KSB546YTU, provided the application current requirements do not exceed the substitute part's maximum rating.

Q: What is the significance of Last Time Buy status for KSB546YTU?

A: Last Time Buy status indicates that KSB546YTU has limited remaining inventory and will not be replenished after current stock is exhausted. For new designs or long-term production, MJE15031G is the recommended choice due to its active product status.

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