onsemi MJL21195

Overview

MJL21195 from onsemi is a PNP silicon power transistor with 250 V_CEO, 16 A continuous collector current, and 200 W total power dissipation at T_C = 25°C, designed for high-fidelity audio output stages and linear amplifier applications requiring high SOA and low THD.

For engineers reviewing the MJL21195 datasheet, pinout, applications, or equivalent options, this device is selected for high-power analog signal amplification where DC current gain linearity (h_FE = 25–100), second-breakdown robustness, and thermal resistance (R_θJC = 0.7°C/W) are critical design constraints.

Technical Context

The MJL21195 employs perforated emitter technology to improve gain linearity and reduce thermal runaway risk in Class-AB audio output stages. Its safe operating area supports nonrepetitive pulse currents up to 4.0 A at V_CE = 50 V and 2.25 A at V_CE = 80 V, enabling reliable operation under transient overload conditions.

It delivers characterized total harmonic distortion ≤0.08% (matched pair) at 1 kHz, 28.3 V_RMS, 100 W_RMS load, and exhibits f_T = 4 MHz at I_C = 1 A, V_CE = 10 V - confirming suitability for wideband linear amplification up to mid-audio frequencies.

Key Specifications

Pinout & Package

Package: TO-264 (Case 340G, Style 2), epoxy-encapsulated, UL 94 V-0 rated, Pb-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-power linear transistor applications.

Compared with BDW84C and MJE15034, the MJL21195 provides superior safe operating area, verified low-distortion performance, and TO-264 thermal efficiency - making it the preferred choice for demanding high-power linear applications where reliability and fidelity are non-negotiable.

Availability

MJL21195 is available at Aetrix Electronics and suitable for high-fidelity audio amplifiers, disk head positioners, and linear regulator pass elements requiring stable component supply, long-lifecycle support, and traceable Pb-free sourcing.

Supply support for MJL21195 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 is a global semiconductor manufacturer specializing in energy-efficient, high-reliability power and analog solutions for automotive, industrial, and consumer markets.

The MJL21195 belongs to onsemi's Silicon Power Transistor product line, engineered specifically for high-power linear amplification and precision current control where thermal stability, gain linearity, and rugged SOA are essential.

FAQ

What is the maximum continuous collector current rating for the MJL21195?

The MJL21195 has a maximum continuous collector current (I_C) rating of 16 A at T_C = 25°C. This rating assumes adequate heatsinking and derates linearly above 25°C at 1.43 W/°C. At elevated case temperatures, the usable current must be reduced to maintain junction temperature below +150°C - for example, at T_C = 85°C, the allowable I_C drops to approximately 10.5 A based on thermal limits. The MJL21195 datasheet specifies this limit under standardized test conditions and must be validated in the final thermal environment.

Does the MJL21195 have a specified total harmonic distortion (THD) value?

Yes, the MJL21195 datasheet specifies total harmonic distortion (THD) as ≤0.08% typical for matched pairs under defined test conditions: V_RMS = 28.3 V, f = 1 kHz, P_LOAD = 100 W_RMS. This value reflects the device's inherent linearity when operated in a symmetric push-pull output stage with appropriate biasing. The MJL21195 itself is not a complete amplifier - THD performance depends on circuit implementation, including driver matching, feedback topology, and thermal management - but its characterized THD confirms suitability for Hi-Fi audio applications.

What package type does the MJL21195 use, and is it RoHS compliant?

The MJL21195 uses the TO-264 (Case 340G, Style 2) package - a large-outline, epoxy-encapsulated, insulated-tab power package with three leads (Base, Collector, Emitter). It is explicitly marked as Pb-free and RoHS compliant per onsemi documentation, meeting UL 94 V-0 flammability requirements at 0.125 inch thickness. The MJL21195G ordering variant denotes the Pb-free version, and the metal tab is electrically connected to the collector, requiring isolation from the heatsink unless circuit topology permits common-collector connection.

How does the perforated emitter technology in the MJL21195 improve performance?

The perforated emitter technology in the MJL21195 enhances current gain linearity across the full operating range and improves thermal distribution within the die, reducing localized hot spots that cause secondary breakdown and gain nonuniformity. This results in more predictable h_FE behavior at high currents (e.g., 8–16 A), improved safe operating area (SOA), and lower distortion in linear amplifier applications. The MJL21195 leverages this structure specifically for high-power audio and precision linear control - distinguishing it from standard planar power transistors lacking such emitter geometry optimization.

Can the MJL21195 be used in parallel configurations, and what considerations apply?

Yes, the MJL21195 can be used in parallel configurations, but requires careful attention to emitter degeneration resistors (typically 0.1–0.22 Ω), matched h_FE and V_BE(on) characteristics, and symmetrical PCB layout to ensure current sharing. The MJL21195's high h_FE linearity and perforated emitter design support stable parallel operation, but mismatched thermal coupling or unequal lead inductance may cause current hogging. For best results, use matched pairs (e.g., factory-selected MJL21195/MJL21196 sets) and verify sharing under worst-case load and temperature conditions.