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

onsemi MJW0281A

Name: MJW0281A
Brand: onsemi
SKU: MJW0281A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJW0281A

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: MJW0281A.pdf

Description:: TRANS NPN 260V 15A TO-247-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJW0281A from onsemi is an NPN silicon power bipolar transistor designed for high-fidelity audio amplifier output stages. It delivers 15 A continuous collector current, 260 V V_CEO, 150 W power dissipation at T_C = 25°C, and exhibits exceptional safe operating area (SOA) with 30 MHz f_T and V_CE(sat) ≤ 1.0 V at I_C = 5.0 A / I_B = 0.5 A.

For engineers reviewing the MJW0281A datasheet, pinout, applications, or equivalent options, key selection criteria include SOA robustness at high voltage/current, gain linearity across 50 mA–5 A, complementary pairing with MJW0302A, thermal resistance (R_θJC = 0.83°C/W), and TO-247 package compatibility with high-power heatsinking.

Technical Context

The MJW0281A operates as a linear-mode NPN power switch in Class AB audio output stages, where precise h_FE matching (±10% with MJW0302A) ensures symmetrical push-pull performance. Its high BV_CEO (260 V) and wide SOA support operation into reactive speaker loads without secondary breakdown.

Dynamic behavior is characterized by f_T = 30 MHz at I_C = 1.0 A / V_CE = 5.0 V and C_ob = 400 pF at V_CB = 10 V, enabling stable wideband amplification up to ~100 kHz with minimal phase shift in feedback loops.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	260 V - Supports rail voltages up to ±120 V in discrete amplifier designs without breakdown risk
I_C (continuous)	15 A - Enables ≥300 W RMS output into 4 Ω loads with adequate heatsinking
P_D @ T_C = 25°C	150 W - Requires low-thermal-resistance mounting (e.g., <0.5°C/W heatsink + interface) for full power use
h_FE @ I_C = 1 A	75–150 - Provides predictable base drive requirements and stable biasing across production lots
V_CE(sat) @ I_C/I_B = 5 A/0.5 A	≤1.0 V - Limits conduction loss to ≤5 W per device at full output current, reducing thermal stress
f_T	30 MHz - Ensures sufficient gain margin for stable negative feedback implementation up to 20 kHz
R_θJC	0.83°C/W - Allows direct junction-to-heatsink thermal path design without intermediate insulation layers

Pinout & Package

Package: TO-247 (Case 340L, Style 3), 3-pin through-hole power package with isolated collector tab for direct heatsink mounting.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input terminal	Receives base current to modulate collector-emitter conduction; requires low-impedance driver for fast switching in Class AB
2 (Collector)	High-current output node	Electrically connected to metal tab; must be insulated from heatsink unless system ground reference permits direct mounting
3 (Emitter)	Current return path	Serves as common reference for emitter degeneration resistors and local feedback networks in output stage topologies

Key Features

Feature	Design Value
Exceptional Safe Operating Area	SOA extends to 260 V / 15 A with no secondary breakdown limit - enables reliable operation into complex speaker impedances
NPN/PNP gain matching within 10%	h_FE tracking between MJW0281A and MJW0302A across 50 mA–5 A ensures balanced push-pull distortion cancellation
High BV_CEO (260 V)	Permits use in high-voltage amplifier rails (e.g., ±100 V) while maintaining >2× safety margin against transient spikes
High f_T (30 MHz)	Supports wide open-loop bandwidth for accurate slew rate and low TIM distortion in high-slew-rate amplifiers
Low R_θJC (0.83°C/W)	Enables efficient thermal transfer to heatsink - critical for sustained high-power audio output without thermal runaway

Applications

Home Audio Amplifiers	Professional PA Systems
Use Scenario: Discrete Class AB output stage in stereo integrated amplifiers delivering 100–300 W per channel into 4–8 Ω speakers. IC Role / Device Role / Timing Role: NPN power switching element in complementary pair configuration, handling positive half-cycle current delivery. Use Value: High SOA and gain linearity minimize crossover distortion and clipping artifacts during dynamic musical transients.	Use Scenario: High-reliability output stage in touring-grade powered mixers and rack-mount amplifiers driving line arrays. IC Role / Device Role / Timing Role: Primary NPN output transistor in paralleled configurations for >500 W/channel continuous power delivery. Use Value: 260 V V_CEO withstands loudspeaker cable inductance-induced flyback spikes during high-SPL operation.
Theater Sound Systems	Studio Monitor Power Amps
Use Scenario: Multi-channel distributed amplification in cinema auditoriums requiring long-term reliability under constant load. IC Role / Device Role / Timing Role: Linear power transistor in thermally managed output modules, paired with MJW0302A for symmetrical drive. Use Value: R_θJC = 0.83°C/W allows integration into forced-air-cooled chassis without derating at ambient temperatures up to 55°C.	Use Scenario: Precision active monitor power sections demanding ultra-low IMD and wide bandwidth reproduction. IC Role / Device Role / Timing Role: High-linearity NPN device in feed-forward or error-corrected output topologies. Use Value: h_FE stability over temperature (−25°C to +100°C) maintains consistent bias point and minimizes thermal drift of quiescent current.

Home Audio Amplifiers

Professional PA Systems

Use Scenario: Discrete Class AB output stage in stereo integrated amplifiers delivering 100–300 W per channel into 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switching element in complementary pair configuration, handling positive half-cycle current delivery.

Use Value: High SOA and gain linearity minimize crossover distortion and clipping artifacts during dynamic musical transients.

Use Scenario: High-reliability output stage in touring-grade powered mixers and rack-mount amplifiers driving line arrays.

IC Role / Device Role / Timing Role: Primary NPN output transistor in paralleled configurations for >500 W/channel continuous power delivery.

Use Value: 260 V V_CEO withstands loudspeaker cable inductance-induced flyback spikes during high-SPL operation.

Theater Sound Systems

Studio Monitor Power Amps

Use Scenario: Multi-channel distributed amplification in cinema auditoriums requiring long-term reliability under constant load.

IC Role / Device Role / Timing Role: Linear power transistor in thermally managed output modules, paired with MJW0302A for symmetrical drive.

Use Value: R_θJC = 0.83°C/W allows integration into forced-air-cooled chassis without derating at ambient temperatures up to 55°C.

Use Scenario: Precision active monitor power sections demanding ultra-low IMD and wide bandwidth reproduction.

IC Role / Device Role / Timing Role: High-linearity NPN device in feed-forward or error-corrected output topologies.

Use Value: h_FE stability over temperature (−25°C to +100°C) maintains consistent bias point and minimizes thermal drift of quiescent current.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC5200	Lower V_CEO (230 V), higher h_FE spread (55–160), R_θJC = 0.65°C/W	Common in Japanese OEM amplifiers; less margin for 100 V+ rails	Select when prioritizing thermal efficiency over voltage headroom; verify SOA curves for reactive loads
KSC1845FBU	V_CEO = 200 V, I_C = 10 A, f_T = 20 MHz, TO-3P package	Smaller footprint but lower power rating; suited for mid-power consumer receivers	Choose for space-constrained PCB layouts where 150 W output is not required

Compared with 2SC5200 and KSC1845FBU, the MJW0281A provides superior voltage margin (260 V) and documented SOA robustness for high-rail audio designs, while maintaining industry-standard TO-247 mechanical compatibility and proven thermal performance in multi-kilowatt amplifier platforms.

Availability

MJW0281A is available at Aetrix Electronics and suitable for high-end consumer audio products, professional PA systems, theater sound installations, and studio monitor power amplifiers requiring stable component supply and long-term manufacturing continuity.

Supply support for MJW0281A 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, sensors, and logic solutions for automotive, industrial, and cloud power applications.

The MJW0281A belongs to onsemi's legacy Power Bipolar Transistor product line, engineered specifically for high-fidelity linear audio output stages where SOA integrity, gain symmetry, and thermal reliability are non-negotiable.

FAQ

What is the maximum continuous collector current rating for the MJW0281A?

The MJW0281A has a maximum continuous collector current (I_C) rating of 15 A at case temperature T_C = 25°C. This rating decreases with rising case temperature per the derating curve in Figure 1; at T_C = 100°C, the usable I_C drops to approximately 9 A. Proper heatsinking is essential to maintain safe junction temperature below +150°C during sustained operation.

Is the MJW0281A pin-compatible with the MJW0302A?

No - the MJW0281A (NPN) and MJW0302A (PNP) share identical TO-247 package dimensions and pinout (Base–Collector–Emitter), but they are complementary devices, not pin-compatible replacements. Both use Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, enabling matched layout in push-pull output stages, but electrical polarity and biasing differ fundamentally.

What is the typical DC current gain (h_FE) of the MJW0281A at 1 A collector current?

The MJW0281A exhibits h_FE = 75–150 at I_C = 1.0 A and V_CE = 5.0 V, per the Electrical Characteristics table. This wide range reflects process variation; actual units are binned, and gain matching within 10% is guaranteed only when paired with MJW0302A in production lots for complementary amplifier designs.

Does the MJW0281A require emitter degeneration resistors in audio output stages?

Yes - emitter degeneration resistors are strongly recommended with the MJW0281A to improve linearity, stabilize bias current against thermal drift, and enhance SOA margin. Typical values range from 0.1 Ω to 0.47 Ω, selected to balance local feedback benefits against conduction loss; the MJW0281A's low V_CE(sat) helps minimize power dissipation in these resistors.

Can the MJW0281A be used in switching power supplies?

The MJW0281A is optimized for linear audio applications, not switching power conversion. While it can conduct in saturation, its relatively slow turn-off characteristics (due to minority-carrier storage) and lack of specified switching parameters make it unsuitable for high-frequency SMPS. For such applications, purpose-built MOSFETs or IGBTs with defined t_on/t_off and Q_g are preferred over the MJW0281A.

MJW0281A Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 260 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 500mA, 5A

Current - Collector Cutoff (Max):: 10µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 75 @ 3A, 5V

Power - Max:: 150 W

Frequency - Transition:: 30MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

MJW0281A FAQ

1.How can I place an order for MJW0281A through Aetrix?

Please submit a Request for Quotation (RFQ) for MJW0281A 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 MJW0281A reliable?

The price and inventory of MJW0281A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJW0281A is usually 5 days.

3.What payment methods are accepted for MJW0281A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJW0281A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJW0281A?

MJW0281A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJW0281A 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 MJW0281A?

For technical support, including MJW0281A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJW0281A requirements.

6.How does Aetrix verify that MJW0281A is sourced from the original manufacturer or authorized distributors?

All MJW0281A 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 MJW0281A meets industry standards.

7.What is the process for return or replacement of MJW0281A?

All MJW0281A units undergo pre-shipment inspection (PSI). If there is an issue with MJW0281A, 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 MJW0281A part is unused and in its original packaging.

Return procedure for MJW0281A:

1.Submit a request within 90 days.

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

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