onsemi MJ15011G

Overview

MJ15011G from onsemi is an NPN silicon power transistor in TO-204AA (TO-3) metal package, rated for 250 V_CEO, 10 A continuous collector current, and 200 W total power dissipation at T_C = 25°C. It delivers high safe operating area (100% tested to 1.2 A @ 100 V), low saturation voltage (V_CE(sat) = 0.6 V max @ I_C = 2 A, I_B = 0.2 A), and DC current gain h_FE ≥ 20 @ 2 A/2 V - optimized for high-fidelity audio amplifier output stages.

For engineers reviewing the MJ15011G datasheet, pinout, applications, or equivalent options, key selection criteria include verified SOA performance at linear bias points, Pb-free TO-204AA mechanical compatibility, second breakdown limits under pulsed conditions, and complementary pairing with MJ15012G for push-pull topologies.

Technical Context

The MJ15011G operates as a linear-mode NPN bipolar junction transistor with base-emitter forward bias control and collector-emitter current amplification. Its design emphasizes thermal robustness via low R_θJC = 0.875°C/W and validated second breakdown immunity (I_S/b = 5 A @ V_CE = 40 V, t = 0.5 s).

It is fully characterized for analog applications: V_BE(on) = 1.8 V max @ I_C = 4 A, Cob = 750 pF @ V_CB = 10 V, f = 1 MHz, and exhibits stable h_FE across 0.1–10 A range per Figure 1 - enabling predictable biasing in Class AB amplifier designs without forced cooling.

Key Specifications

Pinout & Package

Package: TO-204AA (TO-3) metal can with electrically active collector case; Pb-free finish; mounting hole center-to-center spacing 1.187 inches (30.15 mm); case temperature sensing point defined at mounting surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Compared with 2N3055G and KSC2620D, MJ15011G uniquely combines 250 V rating, 100% SOA testing, and 0.875°C/W thermal resistance - making it the only option qualified for high-voltage linear audio output stages requiring guaranteed safe operation across full voltage-current quadrants.

Availability

MJ15011G is available at Aetrix Electronics and suitable for high-fidelity audio amplifiers, disk head positioners, and industrial relay drivers requiring stable component supply, long-term manufacturability, and Pb-free compliance.

Supply support for MJ15011G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MJ15011G belongs to onsemi's PowerBase family of complementary silicon power transistors, engineered specifically for high-reliability linear and switching applications demanding rugged SOA, low saturation loss, and thermal stability - especially in audio and precision motion control.

FAQ

What is the maximum continuous collector current rating for MJ15011G?

The MJ15011G has a maximum continuous collector current (I_C) rating of 10 A at T_C = 25°C. This rating assumes adequate heatsinking to maintain case temperature within limits; derating is required above 25°C at 1.14 W/°C. The device also supports 15 A peak current (I_CM) under pulsed conditions per datasheet Note 1.

Is MJ15011G pin-compatible with MJ15011?

Yes, MJ15011G is a direct Pb-free replacement for MJ15011, sharing identical TO-204AA (TO-3) package dimensions, pinout (Base = Pin 1, Emitter = Pin 2, Collector = Case), and electrical specifications. The "G" suffix denotes RoHS-compliant packaging with no functional or mechanical trade-offs.

Does MJ15011G require a heatsink in all applications?

Yes, MJ15011G requires a heatsink in any application dissipating more than ~5 W continuously. With R_θJC = 0.875°C/W and T_J(max) = +200°C, even modest 20 W dissipation raises junction temperature by 17.5°C above case - necessitating thermal management to prevent SOA violation or accelerated aging.

What is the safe operating area (SOA) test condition for MJ15011G?

The MJ15011G undergoes 100% SOA testing at 1.2 A @ 100 V DC, verifying robustness in the linear region where secondary breakdown risk is highest. This test uses DC conditions - not pulses - confirming capability for sustained operation in Class AB audio output stages without thermal runaway.

Can MJ15011G be used in complementary pairs with MJ15012G?

Yes, MJ15011G (NPN) and MJ15012G (PNP) are explicitly designed as a complementary pair, sharing matched V_CEO, I_C, P_D, and SOA characteristics. Their balanced h_FE and V_CE(sat) minimize crossover distortion in push-pull amplifier outputs when biased identically.