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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi MJE15031

Name: MJE15031
Brand: onsemi
SKU: MJE15031
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJE15031

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: MJE15031.pdf

Description:: TRANS PNP 150V 8A TO-220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJE15031 from onsemi is a PNP silicon power transistor in TO-220 package, rated for 150 V_CEO, 8 A continuous collector current, and 50 W total device dissipation at T_C = 25°C. It delivers high current gain–bandwidth product (f_T = 30 MHz) and is engineered for high-frequency driver stages in audio amplifier output circuits.

For engineers reviewing the MJE15031 datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, 150 V V_CEO rating, TO-220 thermal performance (R_JC = 2.5°C/W), DC current gain linearity across 0.1–3 A, and safe operating area compliance up to 150°C junction temperature.

Technical Context

The MJE15031 operates as a complementary PNP counterpart to the NPN MJE15030, sharing identical TO-220 package geometry and thermal design. Its electrical behavior is defined by V_CEO(sus) = 150 V, I_C = 8 A, and f_T = 30 MHz under standard test conditions (I_C = 500 mA, V_CE = 10 V, f_test = 10 MHz).

It exhibits V_CE(sat) ≤ 0.5 V at I_C = 1 A / I_B = 0.1 A and V_BE(on) ≤ 1.0 V at I_C = 1 A / V_CE = 2 V. Its safe operating area is thermally limited below 100°C case temperature and second-breakdown constrained above that threshold per Figure 3 of the datasheet.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	150 V - Maximum collector-emitter sustaining voltage with base open; defines upper rail voltage capability in Class AB audio output stages.
I_C (continuous)	8 A - Continuous collector current rating at T_C = 25°C; supports high-power push-pull driver operation without forced cooling.
P_D @ T_C = 25°C	50 W - Total device dissipation limit at case temperature 25°C; requires heatsink with R_JA ≤ 62.5°C/W for ambient operation.
f_T	30 MHz - Current gain–bandwidth product at I_C = 500 mA / V_CE = 10 V; enables stable high-frequency response in wideband audio drivers.
R_JC	2.5°C/W - Junction-to-case thermal resistance; determines minimum heatsink interface requirement for thermal management.
h_FE (min)	40 - Minimum DC current gain at I_C = 0.1 A / V_CE = 2 V; ensures sufficient drive efficiency in low-base-current bias networks.
V_CE(sat)	≤ 0.5 V - Collector-emitter saturation voltage at I_C = 1 A / I_B = 0.1 A; minimizes conduction loss and thermal stress in linear amplification.

Pinout & Package

Package: TO-220, Case 221A, Style 1 - 3-pin plastic power package with metal tab (collector-connected), 10.10 × 15.12 × 4.45 mm footprint, 2.54 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input terminal; accepts base current to modulate collector current; requires current-limiting resistor in fixed-bias configurations.
2 & 4	Collector	Main high-side current path; electrically connected to metal tab; must be isolated from heatsink unless tab is collector-referenced.
3	Emitter	Output reference node; typically tied to load or supply rail in common-emitter configuration; carries full load current.

Key Features

Feature	Design Value
High f_T	30 MHz bandwidth supports faithful reproduction of audio harmonics up to 20 kHz with margin, minimizing phase distortion in driver stages.
TO-220 thermal performance	R_JC = 2.5°C/W enables efficient heat transfer to external heatsinks, critical for sustained 50 W dissipation in compact amplifier chassis.
DC current gain linearity	h_FE remains ≥40 from 0.1 A to 3 A (V_CE = 2 V), ensuring consistent gain across dynamic output swing in Class AB operation.
Pb-free & RoHS compliant	G-suffix indicates lead-free termination and RoHS-compliant packaging, meeting global environmental regulations for commercial audio equipment.
Complementary pairing	Designed as direct PNP match to MJE15030 (NPN); identical package, ratings, and SOA enable symmetrical push-pull output stage implementation.

Applications

Audio Power Amplifier Output Stage	High-Voltage Linear Regulator Pass Element
Use Scenario: Final push-pull output stage in discrete Class AB audio amplifiers delivering 50–200 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: PNP power switching element in complementary pair with MJE15030; handles negative half-cycle current delivery. Use Value: 150 V V_CEO and 8 A I_C support rail voltages up to ±75 V, enabling high-output-power designs without series stacking.	Use Scenario: Series pass transistor in high-voltage, medium-current linear regulators for lab power supplies or analog signal chains. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output against input ripple and load transients. Use Value: Low V_CE(sat) (≤0.5 V) and stable h_FE minimize dropout voltage and improve regulation accuracy under 5–7 A load steps.
Discrete Motor Driver Half-Bridge	High-Fidelity Preamp Driver
Use Scenario: Upper-leg switch in discrete H-bridge motor drivers for precision DC servo systems operating at ≤100 V bus. IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow to motor winding during active commutation phases. Use Value: Fast turn-on/off times (t_d, t_r, t_f, t_s specified in datasheet Figures 10–11) reduce switching losses and EMI in PWM-driven bridges.	Use Scenario: Voltage gain stage driving low-impedance loads (e.g., 600 Ω professional audio lines or transformer-coupled outputs). IC Role / Device Role / Timing Role: High-linearity, low-noise emitter-follower or common-emitter buffer amplifying preamp signals before power stage. Use Value: h_FE linearity and f_T > 30 MHz preserve transient fidelity and phase coherence across 20 Hz–20 kHz bandwidth.

Audio Power Amplifier Output Stage

High-Voltage Linear Regulator Pass Element

Use Scenario: Final push-pull output stage in discrete Class AB audio amplifiers delivering 50–200 W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: PNP power switching element in complementary pair with MJE15030; handles negative half-cycle current delivery.

Use Value: 150 V V_CEO and 8 A I_C support rail voltages up to ±75 V, enabling high-output-power designs without series stacking.

Use Scenario: Series pass transistor in high-voltage, medium-current linear regulators for lab power supplies or analog signal chains.

IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output against input ripple and load transients.

Use Value: Low V_CE(sat) (≤0.5 V) and stable h_FE minimize dropout voltage and improve regulation accuracy under 5–7 A load steps.

Discrete Motor Driver Half-Bridge

High-Fidelity Preamp Driver

Use Scenario: Upper-leg switch in discrete H-bridge motor drivers for precision DC servo systems operating at ≤100 V bus.

IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow to motor winding during active commutation phases.

Use Value: Fast turn-on/off times (t_d, t_r, t_f, t_s specified in datasheet Figures 10–11) reduce switching losses and EMI in PWM-driven bridges.

Use Scenario: Voltage gain stage driving low-impedance loads (e.g., 600 Ω professional audio lines or transformer-coupled outputs).

IC Role / Device Role / Timing Role: High-linearity, low-noise emitter-follower or common-emitter buffer amplifying preamp signals before power stage.

Use Value: h_FE linearity and f_T > 30 MHz preserve transient fidelity and phase coherence across 20 Hz–20 kHz bandwidth.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJE15029G	Same TO-220 package and pinout; lower V_CEO = 120 V (vs. 150 V); identical I_C, P_D, f_T, and thermal specs.	Suitable only for ≤±60 V rail audio or regulator designs; not interchangeable in 150 V systems without derating or redesign.	Select MJE15029G only when 120 V rating suffices and cost optimization is prioritized over voltage headroom.
BD711	TO-126 package (smaller footprint); V_CEO = 100 V; I_C = 12 A; f_T = 3 MHz; higher R_JA = 80°C/W limits power handling without heatsink.	Not drop-in replaceable due to different package, pinout (E-B-C vs. B-C-E), and lower voltage/frequency capability.	Consider BD711 only for space-constrained, lower-voltage (<100 V), lower-bandwidth applications where TO-220 mounting is impractical.

Compared with MJE15029G and BD711, the MJE15031 offers superior voltage margin (150 V), identical thermal performance to its family members, and higher frequency response-making it the optimal choice for high-fidelity, high-rail audio output stages requiring reliability and symmetry with MJE15030.

Availability

MJE15031 is available at Aetrix Electronics and suitable for audio amplifier output stages, high-voltage linear regulators, discrete motor driver half-bridges, and high-fidelity preamp driver circuits requiring stable component supply and long-term industrial availability.

Supply support for MJE15031 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, and consumer markets.

The MJE15031 belongs to onsemi's complementary silicon plastic power transistor family, designed specifically for high-frequency, high-current driver applications in discrete audio amplifier output stages and linear power control circuits.

FAQ

What is the maximum collector-emitter voltage rating for the MJE15031?

The MJE15031 has a maximum collector-emitter sustaining voltage (V_CEO(sus)) of 150 Vdc at I_C = 10 mA and I_B = 0. This rating is confirmed in the "OFF CHARACTERISTICS" table of the official onsemi datasheet (Rev. 8, December 2024). Exceeding this voltage risks avalanche breakdown and permanent device failure, especially under transient conditions without clamping protection.

Is the MJE15031 pin-compatible with the MJE15029?

Yes, the MJE15031 is pin-compatible with the MJE15029 - both use TO-220 package Style 1 with identical pin assignments: Pin 1 = Base, Pins 2 & 4 = Collector, Pin 3 = Emitter. However, they differ in V_CEO (150 V vs. 120 V), so substitution requires verification of voltage margin in the target circuit to avoid overstress.

What is the thermal resistance from junction to case for the MJE15031?

The MJE15031 has a maximum thermal resistance from junction to case (R_JC) of 2.5°C/W, as specified in the "THERMAL CHARACTERISTICS" section of the onsemi datasheet. This value assumes proper mounting with thermal compound and mechanical torque per TO-220 standards; actual thermal performance depends on heatsink interface quality and airflow.

Does the MJE15031 have a Pb-free and RoHS-compliant version?

Yes, the MJE15031G is the Pb-free and RoHS-compliant version of the part, indicated by the "G" suffix in the ordering code. The datasheet explicitly states "These Devices are Pb−Free and are RoHS Compliant" and confirms Pb-free plating and packaging per onsemi's compliance documentation referenced in the datasheet footer.

What is the typical current gain–bandwidth product (f_T) of the MJE15031?

The MJE15031 has a minimum current gain–bandwidth product (f_T) of 30 MHz, measured at I_C = 500 mAdc, V_CE = 10 Vdc, and f_test = 10 MHz. This value is listed in the "DYNAMIC CHARACTERISTICS" table and verified in Figure 7 of the onsemi datasheet, confirming suitability for high-frequency audio driver applications.

MJE15031 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 8 A

Voltage - Collector Emitter Breakdown (Max):: 150 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 100mA, 1A

Current - Collector Cutoff (Max):: 100µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20 @ 4A, 2V

Power - Max:: 50 W

Frequency - Transition:: 30MHz

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

MJE15031 FAQ

1.How can I place an order for MJE15031 through Aetrix?

Please submit a Request for Quotation (RFQ) for MJE15031 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MJE15031 reliable?

The price and inventory of MJE15031 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJE15031 is usually 5 days.

3.What payment methods are accepted for MJE15031?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJE15031 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJE15031?

MJE15031 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJE15031 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MJE15031?

For technical support, including MJE15031 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJE15031 requirements.

6.How does Aetrix verify that MJE15031 is sourced from the original manufacturer or authorized distributors?

All MJE15031 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MJE15031 meets industry standards.

7.What is the process for return or replacement of MJE15031?

All MJE15031 units undergo pre-shipment inspection (PSI). If there is an issue with MJE15031, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MJE15031 part is unused and in its original packaging.

Return procedure for MJE15031:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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