onsemi MJE4353G

Overview

MJE4353G from onsemi is a PNP high-voltage, high-power bipolar junction transistor designed for complementary use with MJE4343G in audio amplifier output stages and high-voltage switching regulator circuits. It features V_CEO(sus) = 160 Vdc, continuous I_C = 16 A, P_D = 125 W at T_C = 25 °C, h_FE = 35 (typ) at I_C = 8.0 A, and V_CE(sat) = 2.0 V (max) under same conditions.

For engineers reviewing the MJE4353G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal resistance (R_θJC = 1.0 °C/W), safe operating area limits, switching time characteristics, and Pb-free TO-247/SOT-93 package compatibility - all critical for high-reliability power stage design and thermal management validation.

Technical Context

The MJE4353G operates as a linear or switching PNP BJT with sustained collector-emitter voltage capability up to 160 Vdc and rated for continuous collector current of 16 A. Its DC current gain (h_FE) ranges from 15–35 across I_C = 8–16 A, supporting stable biasing in Class AB audio outputs and regulated DC-DC topologies.

Thermal performance is defined by R_θJC = 1.0 °C/W, enabling predictable junction-to-case temperature rise under load. Safe operating area (SOA) curves include both forward-bias (Figure 10) and reverse-bias (Figure 11) limits, with secondary breakdown constraints validated for pulse duty cycles ≤10% and clamped turn-off conditions.

Key Specifications

Pinout & Package

Available in Pb-free TO-247 (Case 340L, Style 3) and SOT-93 (TO-218, Case 340D, Style 1) packages. Both feature 4-terminal configuration with dual collector leads for enhanced current handling and thermal path redundancy.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MJE15035G and BDW73G, the MJE4353G provides superior voltage margin (160 V), higher current capacity (16 A), and greater thermal headroom (125 W), making it the preferred choice for new 200+ W audio and 400 V-input SMPS designs requiring single-device robustness.

Availability

MJE4353G is available at Aetrix Electronics and suitable for high-fidelity audio amplifier output stages, high-voltage switching regulator circuits, and linear power supply pass transistor applications requiring stable component supply and long-term industrial availability.

Supply support for MJE4353G 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 management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MJE4353G belongs to onsemi's high-voltage, high-power discrete transistor product line, engineered specifically for demanding linear and switching power applications where ruggedness, thermal stability, and SOA integrity are essential.

FAQ

What is the maximum continuous collector current rating for MJE4353G?

The MJE4353G has a maximum continuous collector current (I_C) rating of 16 Adc at case temperature T_C = 25 °C. This rating assumes proper heatsinking and adherence to the derating curve in Figure 1. At elevated case temperatures, current must be reduced linearly per the specified power derating slope of 1.0 W/°C above 25 °C. The MJE4353G also supports 20 A peak current under pulsed conditions with 10% duty cycle.

Does MJE4353G support complementary pairing with an NPN transistor?

Yes, the MJE4353G is explicitly designed as the PNP complement to the NPN MJE4343G. Both share identical voltage ratings (V_CEO = 160 V), thermal resistance (R_θJC = 1.0 °C/W), package options (TO-247/SOT-93), and SOA characteristics. This matched pairing ensures symmetrical performance in push-pull amplifier stages and half-bridge configurations where balanced gain, saturation voltage, and switching behavior are critical.

What is the safe operating area (SOA) limitation for MJE4353G during reverse-biased turn-off?

The MJE4353G reverse-bias SOA (RBSOA) is defined in Figure 11 of the datasheet, specifying maximum allowable collector current versus collector-emitter voltage under clamped turn-off conditions with V_BE(off) ≤ 5 V and T_J = 100 °C. At 160 V, the device supports ≤4 A; at 80 V, it supports up to 12 A. Exceeding these limits risks secondary breakdown. The MJE4353G must be used with active clamping or snubbing networks to enforce these boundaries in inductive-switching applications.

Is MJE4353G compatible with both TO-247 and SOT-93 packages?

Yes, the MJE4353G is offered in both TO-247 (Case 340L, Style 3) and SOT-93 (TO-218, Case 340D, Style 1) packages, as confirmed in the Ordering Information table on page 2 of the datasheet. Both variants are Pb-free (G-suffix) and share identical electrical specifications, pinout (Base–Collector–Emitter–Collector), and thermal resistance. Designers may select based on mechanical fit, heatsink interface, or legacy board compatibility without performance trade-offs.

What is the typical DC current gain (h_FE) of MJE4353G at operating conditions relevant to audio amplifiers?

The MJE4353G exhibits h_FE = 35 (typical) at I_C = 8.0 A and V_CE = 2.0 Vdc - conditions representative of quiescent and mid-power operation in Class AB audio output stages. At higher currents (I_C = 16 A), h_FE drops to 15 (typical), which must be accounted for in bias network design. The gain remains stable across –55 °C to +150 °C junction temperature, as shown in Figure 7, ensuring consistent linearity in wide-temperature environments.