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

onsemi MJW21194

Name: MJW21194
Brand: onsemi
SKU: MJW21194
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJW21194

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-247-3

Datasheet:: MJW21194.pdf

Description:: TRANS NPN 250V 16A TO-247-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJW21194 from onsemi is an NPN silicon power transistor designed for high-power linear amplification, featuring 250 V_CEO, 16 A continuous collector current, 200 W power dissipation at T_C = 25°C, and Perforated Emitter technology optimized for audio output stages and disk head positioners.

For engineers reviewing the MJW21194 datasheet, pinout, applications, or equivalent options, key selection criteria include SOA robustness at 50–80 V, THD < 0.08% at 1 kHz/100 W, matched h_FE capability (50 @ 5 A/5 V), and TO-247 thermal resistance of 0.7°C/W junction-to-case.

Technical Context

The MJW21194 operates as a linear-mode NPN bipolar junction transistor with base-emitter forward bias control, supporting high-fidelity analog amplification where gain linearity and second-breakdown immunity are critical. Its Perforated Emitter structure enhances current distribution and thermal stability under sustained DC and dynamic load conditions.

It delivers characterized total harmonic distortion performance in Class AB audio output stages and supports precise linear positioning in servo loops via high DC current gain (h_FE ≥ 20 at 8 A) and low V_CE(sat) (≤ 1.4 V at 16 A/3.2 A).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	250 Vdc - Withstands 250 V collector-emitter voltage before breakdown, enabling use in ±100 V rail audio amplifiers.
I_C (continuous)	16 Adc - Supports sustained 16 A output current without derating at T_C ≤ 25°C, suitable for high-power output stages.
P_D @ T_C = 25°C	200 W - Delivers full 200 W dissipation when mounted on heatsink maintaining case temperature at 25°C.
h_FE @ 8 A/5 V	20–80 - High and stable DC current gain ensures predictable biasing and minimal thermal drift in linear designs.
THD @ 1 kHz	≤ 0.08% - Verified low distortion at 100 W RMS into 8 Ω, meeting Hi-Fi amplifier requirements per Audio Precision test setup.
R_JC	0.7 °C/W - Enables efficient heat transfer from junction to heatsink, critical for reliability in sealed or convection-limited enclosures.
f_T	4 MHz - Sufficient bandwidth for audio-frequency amplification up to 20 kHz with margin, confirmed at I_C = 1 A.

Pinout & Package

Package: TO-247 (Case 340L, Style 3), Pb-free, thermally optimized for high-power discrete mounting with isolated collector tab.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased BJT operation; requires current-limited drive (I_B ≤ 5 A continuous) to avoid saturation delay.
2	Collector	Main high-current output node; electrically connected to metal tab for direct heatsink mounting and low-inductance power path.
3	Emitter	Reference terminal for emitter-degeneration resistors; used for local feedback and thermal compensation in output stage designs.
4	Collector	Second collector connection - parallel path to Pin 2, reducing current density and improving SOA during pulsed operation.

Key Features

Feature	Design Value
Perforated Emitter technology	Improves current uniformity and thermal distribution across emitter area, reducing localized hot spots during high-I_C operation.
High SOA (Safe Operating Area)	Rated for 4.0 A at V_CE = 50 V (1 s non-repetitive), enabling reliable transient handling in audio clipping and servo overload events.
Matched h_FE capability	Paired units specified at h_FE = 50 @ 5 A/5 V, simplifying complementary push-pull stage balancing without external trimming.
Total Harmonic Distortion characterization	Tested per Audio Precision Model One Plus circuit (Fig. 18); THD ≤ 0.08% at 100 W RMS confirms suitability for Class AB Hi-Fi output stages.
Pb-free & RoHS-compliant	Meets EU Directive 2011/65/EU; compatible with lead-free reflow and wave soldering processes without thermal degradation.

Applications

High-Fidelity Audio Amplifiers	Disk Drive Head Positioning Servos
Use Scenario: Final output stage in Class AB stereo power amplifiers delivering 100–200 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: NPN power switching and linear amplification element in complementary pair configuration with MJW21193. Use Value: Low THD (≤ 0.08%) and high SOA ensure clean signal reproduction and resilience against speaker short-circuit transients.	Use Scenario: Linear actuator driver in HDD voice coil motor (VCM) control loops requiring precise bidirectional current control. IC Role / Device Role / Timing Role: High-current, low-latency current source/sink in closed-loop servo amplifier topology. Use Value: Excellent gain linearity and fast f_T (4 MHz) enable accurate position tracking with minimal phase lag at 10 kHz bandwidth.
Industrial Linear Power Supplies	RF Linear Driver Stages
Use Scenario: Pass transistor in high-current, low-noise adjustable bench power supplies (0–60 V, 0–15 A). IC Role / Device Role / Timing Role: Series pass element regulating output voltage under variable load and line conditions. Use Value: High V_CEO (250 V) and robust SOA allow safe operation with wide input-output differentials and capacitive loads.	Use Scenario: Final-stage driver in HF/VHF linear RF amplifiers (1–30 MHz) for amateur radio and test equipment. IC Role / Device Role / Timing Role: High-efficiency, broadband current amplifier operating in Class A or AB mode. Use Value: f_T = 4 MHz and low C_ob (≤ 500 pF) support stable gain up to 20 MHz with minimal neutralization complexity.

High-Fidelity Audio Amplifiers

Disk Drive Head Positioning Servos

Use Scenario: Final output stage in Class AB stereo power amplifiers delivering 100–200 W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: NPN power switching and linear amplification element in complementary pair configuration with MJW21193.

Use Value: Low THD (≤ 0.08%) and high SOA ensure clean signal reproduction and resilience against speaker short-circuit transients.

Use Scenario: Linear actuator driver in HDD voice coil motor (VCM) control loops requiring precise bidirectional current control.

IC Role / Device Role / Timing Role: High-current, low-latency current source/sink in closed-loop servo amplifier topology.

Use Value: Excellent gain linearity and fast f_T (4 MHz) enable accurate position tracking with minimal phase lag at 10 kHz bandwidth.

Industrial Linear Power Supplies

RF Linear Driver Stages

Use Scenario: Pass transistor in high-current, low-noise adjustable bench power supplies (0–60 V, 0–15 A).

IC Role / Device Role / Timing Role: Series pass element regulating output voltage under variable load and line conditions.

Use Value: High V_CEO (250 V) and robust SOA allow safe operation with wide input-output differentials and capacitive loads.

Use Scenario: Final-stage driver in HF/VHF linear RF amplifiers (1–30 MHz) for amateur radio and test equipment.

IC Role / Device Role / Timing Role: High-efficiency, broadband current amplifier operating in Class A or AB mode.

Use Value: f_T = 4 MHz and low C_ob (≤ 500 pF) support stable gain up to 20 MHz with minimal neutralization complexity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics TIP35C	Lower V_CEO (100 V), lower P_D (125 W), no THD characterization, TO-218 package (higher R_JC = 1.5°C/W).	Suitable only for ≤ ±40 V supply rails; not recommended for Hi-Fi audio due to uncharacterized distortion and narrower SOA.	Select MJW21194 when >100 V blocking, <0.1% THD, or SOA-critical linear operation is required.
ON Semiconductor MJE15034	Same V_CEO (250 V), lower I_C (8 A), lower P_D (75 W), TO-220 package, no Perforated Emitter or THD data.	Limited to medium-power applications; lacks MJW21194's thermal and distortion performance for high-end audio or servo use.	Choose MJW21194 for >10 A continuous current, 200 W dissipation, or matched-pair audio output stage designs.

Compared with TIP35C and MJE15034, the MJW21194 provides superior thermal performance (R_JC = 0.7°C/W), verified low-distortion operation, and extended SOA-making it the preferred choice for demanding linear applications where reliability and fidelity are design-critical.

Availability

MJW21194 is available at Aetrix Electronics and suitable for high-fidelity audio amplifiers, disk drive servo systems, and industrial linear power supplies requiring stable component supply, long-term lifecycle support, and traceable Pb-free sourcing.

Supply support for MJW21194 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, cloud, and consumer markets.

The MJW21194 belongs to onsemi's Silicon Power Transistor family, engineered specifically for high-reliability linear amplification and precision motion control where thermal stability, gain linearity, and SOA integrity are essential.

FAQ

What is the maximum continuous collector current rating for the MJW21194?

The MJW21194 has a maximum continuous collector current (I_C) rating of 16 A at case temperature (T_C) = 25°C. This rating decreases linearly above 25°C at 1.43 W/°C derating, consistent with its 200 W total power dissipation limit and 0.7°C/W junction-to-case thermal resistance. The MJW21194 must be mounted on an appropriately sized heatsink to maintain safe junction temperatures under sustained load.

Does the MJW21194 support matched-pair configurations with the MJW21193?

Yes-the MJW21194 is the NPN complement to the PNP MJW21193, and both devices are characterized for matched h_FE (50 @ 5 A/5 V) to simplify push-pull output stage design. Their shared Perforated Emitter construction, identical TO-247 packaging, and symmetrical SOA curves enable tightly balanced conduction in Class AB audio amplifiers without external gain-trimming components.

What is the Safe Operating Area (SOA) performance of the MJW21194 at 80 V?

At V_CE = 80 V, the MJW21194 supports a non-repetitive second-breakdown collector current (I_S/b) of 2.25 A for 1 second, as specified in the datasheet. This SOA capability enables reliable operation during transient overloads such as speaker short circuits or servo step-response overshoot, provided proper heatsinking and base drive limiting are implemented in the MJW21194 application circuit.

Is the MJW21194 RoHS-compliant and lead-free?

Yes-the MJW21194 is manufactured in a Pb-free package (indicated by the "G" suffix) and complies with the EU RoHS Directive 2011/65/EU. It is qualified for lead-free reflow soldering profiles and contains no intentionally added lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE).

What thermal resistance values apply to the MJW21194 in TO-247 package?

The MJW21194 exhibits a junction-to-case thermal resistance (R_JC) of 0.7°C/W and a junction-to-ambient thermal resistance (R_JA) of 40°C/W. The low R_JC value reflects the efficient thermal path from die to the isolated collector tab in the TO-247 package, making heatsink interface quality the dominant factor in overall thermal performance for the MJW21194.

MJW21194 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):: 16 A

Voltage - Collector Emitter Breakdown (Max):: 250 V

Vce Saturation (Max) @ Ib, Ic:: 4V @ 3.2A, 16A

Current - Collector Cutoff (Max):: 100µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20 @ 8A, 5V

Power - Max:: 200 W

Frequency - Transition:: 4MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

MJW21194 FAQ

1.How can I place an order for MJW21194 through Aetrix?

Please submit a Request for Quotation (RFQ) for MJW21194 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 MJW21194 reliable?

The price and inventory of MJW21194 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJW21194 is usually 5 days.

3.What payment methods are accepted for MJW21194?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJW21194 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJW21194?

MJW21194 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJW21194 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 MJW21194?

For technical support, including MJW21194 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJW21194 requirements.

6.How does Aetrix verify that MJW21194 is sourced from the original manufacturer or authorized distributors?

All MJW21194 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 MJW21194 meets industry standards.

7.What is the process for return or replacement of MJW21194?

All MJW21194 units undergo pre-shipment inspection (PSI). If there is an issue with MJW21194, 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 MJW21194 part is unused and in its original packaging.

Return procedure for MJW21194:

1.Submit a request within 90 days.

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

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