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

onsemi MJW1302A

Name: MJW1302A
Brand: onsemi
SKU: MJW1302A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJW1302A

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: MJW1302A.pdf

Description:: TRANS PNP 230V 15A TO-247-3

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Product details

Overview

MJW1302A from onsemi is a complementary PNP silicon power bipolar transistor designed for high-fidelity linear amplification, with V_CEO = 230 V, I_C = 15 A continuous, P_D = 200 W at T_C = 25 °C, and f_T = 30 MHz typical - deployed in high-power audio output stages and precision linear servo drivers.

For engineers reviewing the MJW1302A datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) at 100 V/1 A for 1 second, h_FE ≥ 45 at I_C = 8 A, low harmonic distortion, and TO-247 package thermal resistance R_JC = 0.625 °C/W.

Technical Context

The MJW1302A operates as a linear-mode PNP power switch with base-controlled current amplification, optimized for Class AB audio output stages where gain linearity across 100 mA–7 A is critical. Its SOA extends to 100 V/1 A (1 s), supporting robust transient handling without secondary breakdown.

It features complementary pairing with the NPN MJW3281A - identical voltage/current ratings, matching h_FE curves, and symmetrical f_T and C_ob (600 pF), enabling balanced push-pull stage design without gain skew or phase mismatch.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	230 V - Supports rail voltages up to ±100 V in dual-supply audio amplifiers without breakdown.
I_C (cont.)	15 A - Delivers >100 W into 4 Ω loads in linear output configurations.
P_D @ T_C = 25°C	200 W - Enables high-power dissipation with heatsink mounting via TO-247 case tab.
h_FE min @ I_C = 8 A	45 - Ensures stable bias control and predictable current drive in high-current output stages.
f_T typ.	30 MHz - Maintains wide open-loop bandwidth and low phase shift up to mid-audio frequencies.
R_JC	0.625 °C/W - Allows efficient heat transfer from junction to heatsink, limiting ΔT to ≤125 °C at full 200 W.
C_ob max	600 pF - Minimizes Miller capacitance impact on stability in high-gain feedback loops.

Pinout & Package

Package: TO-247 (Case 340L), isolated collector tab, Pb-free option designated MJW1302AG.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires ~1.5 A max continuous drive for full 15 A output.
2	Collector	Main high-current output terminal; electrically connected to metal tab for heatsinking.
3	Emitter	Reference node for output stage; carries full load current and sets emitter-follower topology polarity.

Key Features

Feature	Design Value
Gain linearity (100 mA–7 A)	h_FE remains ≥50 across 2-decade current range - reduces crossover distortion in Class AB amplifiers.
High SOA (100 V/1 A, 1 s)	Withstands short-term overload transients without thermal runaway - critical for speaker protection.
Low V_CE(sat) (0.4 V typ. @ 10 A)	Minimizes conduction loss and heat generation in saturated switching regions of quasi-complementary designs.
Complementary pairing with MJW3281A	Matched V_CEO, I_C, h_FE, f_T, and C_ob - enables symmetrical push-pull operation without compensation.
Pb-free packaging (MJW1302AG)	RoHS-compliant TO-247 variant available with G-suffix marking - supports lead-free reflow and environmental compliance.

Applications

High-Fidelity Audio Amplifiers	Linear Servo Drivers
Use Scenario: Final output stage in discrete Class AB power amplifiers delivering 100+ W into 4–8 Ω loads. IC Role / Device Role / Timing Role: PNP power output transistor in complementary pair with MJW3281A, conducting during negative half-cycle. Use Value: Low harmonic distortion and gain linearity preserve signal fidelity; 230 V rating supports ±90 V rails.	Use Scenario: Precision position control in HDD voice coil actuators and industrial linear motion systems. IC Role / Device Role / Timing Role: Linear current driver regulating coil current with analog feedback, operating in active region. Use Value: High SOA and thermal stability ensure reliable operation under dynamic load transients and sustained DC bias.
DC Power Supplies	Ultrasonic Transducer Drivers
Use Scenario: Pass element in high-current linear regulated supplies (e.g., lab bench PSUs). IC Role / Device Role / Timing Role: Series pass transistor dissipating up to 200 W while maintaining tight voltage regulation. Use Value: 200 W power rating and 0.625 °C/W R_JC enable compact heatsink integration without derating.	Use Scenario: Resonant drive stage for piezoelectric ultrasonic cleaners and medical imaging transducers. IC Role / Device Role / Timing Role: Switching/linear hybrid driver delivering high peak current at 20–100 kHz. Use Value: 30 MHz f_T and low C_ob support clean square-wave edge integrity and minimal phase lag.

High-Fidelity Audio Amplifiers

Linear Servo Drivers

Use Scenario: Final output stage in discrete Class AB power amplifiers delivering 100+ W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: PNP power output transistor in complementary pair with MJW3281A, conducting during negative half-cycle.

Use Value: Low harmonic distortion and gain linearity preserve signal fidelity; 230 V rating supports ±90 V rails.

Use Scenario: Precision position control in HDD voice coil actuators and industrial linear motion systems.

IC Role / Device Role / Timing Role: Linear current driver regulating coil current with analog feedback, operating in active region.

Use Value: High SOA and thermal stability ensure reliable operation under dynamic load transients and sustained DC bias.

DC Power Supplies

Ultrasonic Transducer Drivers

Use Scenario: Pass element in high-current linear regulated supplies (e.g., lab bench PSUs).

IC Role / Device Role / Timing Role: Series pass transistor dissipating up to 200 W while maintaining tight voltage regulation.

Use Value: 200 W power rating and 0.625 °C/W R_JC enable compact heatsink integration without derating.

Use Scenario: Resonant drive stage for piezoelectric ultrasonic cleaners and medical imaging transducers.

IC Role / Device Role / Timing Role: Switching/linear hybrid driver delivering high peak current at 20–100 kHz.

Use Value: 30 MHz f_T and low C_ob support clean square-wave edge integrity and minimal phase lag.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BD711	V_CEO = 100 V, I_C = 12 A, P_D = 125 W - lower voltage/current rating and narrower SOA.	Limited to ≤±45 V supplies; unsuitable for 100 W+ audio or high-rail linear supplies.	Select BD711 only for cost-sensitive, lower-power (<60 W) linear amplifiers with <80 V rails.
MJE15034	V_CEO = 250 V, I_C = 8 A, P_D = 150 W - higher voltage but lower current and power than MJW1302A.	Better for high-voltage/low-current applications (e.g., tube amplifier drivers); insufficient for 15 A output stages.	Choose MJE15034 when V_CEO margin >230 V is required but peak current stays ≤8 A.

Compared with BD711 and MJE15034, the MJW1302A uniquely balances 230 V breakdown, 15 A current, and 200 W dissipation - making it the only option among the three qualified for full-range, high-power linear audio output stages requiring both voltage headroom and thermal robustness.

Availability

MJW1302A is available at Aetrix Electronics and suitable for high-fidelity audio amplifiers, linear servo drivers, and high-current DC power supplies requiring stable component supply, long-lifecycle availability, and traceable sourcing.

Supply support for MJW1302A 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 supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The MJW1302A belongs to onsemi's PowerBase bipolar transistor family - engineered specifically for high-linearity, high-reliability linear amplification and precision analog power control.

FAQ

What is the maximum continuous collector current for the MJW1302A?

The MJW1302A has a maximum continuous collector current (I_C) of 15 A at T_C = 25 °C. This rating assumes proper 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 practical I_C limit drops to approximately 6.2 A. The MJW1302A datasheet specifies this limit under "Maximum Ratings" and confirms it with SOA curves.

Is the MJW1302A pin-compatible with the MJW3281A?

Yes, the MJW1302A and MJW3281A share identical TO-247 package pinout: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter. This complementary pin alignment allows direct placement in push-pull output stages without PCB layout changes. Both devices also match in mechanical footprint, thermal pad configuration, and mounting hole spacing - verified in onsemi's CASE 340L mechanical drawings and the shared "ORDERING INFORMATION" table in the MJW3281A/D datasheet.

Does the MJW1302A support Pb-free assembly processes?

Yes, the MJW1302AG variant is the official Pb-free version of the MJW1302A, marked with a "G" suffix and compliant with RoHS Directive 2011/65/EU. It uses matte tin plating and qualifies for standard lead-free reflow profiles (peak 260 °C, 10 s). The MJW1302AG shares identical electrical and thermal specifications with the standard MJW1302A - confirmed in the "ORDERING INFORMATION" section and Pb-Free strategy notes in the onsemi datasheet.

What is the Safe Operating Area (SOA) of the MJW1302A at 100 V?

The MJW1302A supports 1 A continuous collector current at V_CE = 100 V for 1 second (non-repetitive), per Figure 13 in the onsemi datasheet. This defines its active-region SOA boundary under transient conditions. For repetitive operation, the SOA curve shows that at 100 V, the maximum sustainable I_C drops to ~0.4 A at DC - emphasizing the need for pulse-width limitation or forced cooling in sustained high-voltage/high-current use. The MJW1302A's SOA exceeds many legacy power transistors due to optimized doping and geometry.

How does the MJW1302A's h_FE perform at high current?

The MJW1302A maintains h_FE ≥ 45 at I_C = 8 A and V_CE = 5 V, with typical values reaching 50 across 100 mA–7 A - demonstrating exceptional gain linearity for a power transistor. This behavior is validated in the "ELECTRICAL CHARACTERISTICS" table and Figure 5/6 of the datasheet. Such consistency minimizes distortion in Class AB output stages and simplifies bias network design, distinguishing the MJW1302A from non-linear alternatives like the 2N3055 or TIP36C.

MJW1302A Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 15 A

Voltage - Collector Emitter Breakdown (Max):: 230 V

Vce Saturation (Max) @ Ib, Ic:: 2V @ 1A, 10A

Current - Collector Cutoff (Max):: 50µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 50 @ 7A, 5V

Power - Max:: 200 W

Frequency - Transition:: 30MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

MJW1302A FAQ

1.How can I place an order for MJW1302A through Aetrix?

Please submit a Request for Quotation (RFQ) for MJW1302A 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 MJW1302A reliable?

The price and inventory of MJW1302A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJW1302A is usually 5 days.

3.What payment methods are accepted for MJW1302A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJW1302A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJW1302A?

MJW1302A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJW1302A 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 MJW1302A?

For technical support, including MJW1302A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJW1302A requirements.

6.How does Aetrix verify that MJW1302A is sourced from the original manufacturer or authorized distributors?

All MJW1302A 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 MJW1302A meets industry standards.

7.What is the process for return or replacement of MJW1302A?

All MJW1302A units undergo pre-shipment inspection (PSI). If there is an issue with MJW1302A, 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 MJW1302A part is unused and in its original packaging.

Return procedure for MJW1302A:

1.Submit a request within 90 days.

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

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