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

onsemi MJE5730

Name: MJE5730
Brand: onsemi
SKU: MJE5730
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJE5730

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: MJE5730.pdf

Description:: TRANS PNP 300V 1A TO-220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJE5730 from onsemi is a high-voltage PNP silicon plastic power transistor in TO-220 package, rated for 300 V_CEO, 1.0 A continuous collector current, and 40 W total device dissipation at T_C = 25°C. It serves as a line-operated audio output amplifier stage and switch-mode power supply driver, optimized for robust switching in industrial and consumer power electronics.

For engineers reviewing the MJE5730 datasheet, pinout, applications, or equivalent options, key selection criteria include its 300 V blocking capability, 1.0 A DC current handling, thermal resistance of 3.125°C/W (junction-to-case), and compatibility with standard TO-220 heatsinking solutions in high-reliability linear and switching designs.

Technical Context

The MJE5730 operates as a medium-power PNP bipolar junction transistor with fixed gain characteristics (h_FE = 30–150 at I_C = 0.3 A), low saturation voltage (V_CE(sat) ≤ 1.0 V at I_C/I_B = 5), and 10 MHz f_T bandwidth. Its safe operating area is defined by second-breakdown and thermal limits up to 150°C junction temperature.

Designed for discrete switching and linear amplification, it features unclamped inductive load energy rating of 20 mJ and supports base-emitter reverse bias up to 5.0 V. The device complies with RoHS and uses Pb-free packaging per onsemi's SOLDER RM/D guidelines.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	300 Vdc - Maximum collector-emitter voltage before breakdown; enables use in 240 VAC line-derived supplies.
I_C (continuous)	1.0 Adc - Sustained collector current rating; defines maximum linear or pulsed load drive capability.
P_D @ T_C = 25°C	40 W - Total power dissipation limit with adequate heatsinking; requires thermal interface design below 3.125°C/W R_JC.
V_CE(sat)	≤1.0 Vdc @ I_C = 1.0 A, I_B = 0.2 A - Low saturation voltage minimizes conduction loss in switching applications.
f_T	10 MHz - Transition frequency confirms usable bandwidth for audio-frequency amplification and SMPS gate driving.
R_JA	62.5°C/W - Junction-to-ambient thermal resistance without heatsink; informs minimum PCB copper area or forced-air cooling needs.
E (inductive)	20 mJ - Unclamped inductive switching energy rating; sets safe turn-off limits for relay or motor driver circuits.

Pinout & Package

Package: TO-220 (Case 221A-09, Style 1), plastic, Pb-free, with metal tab electrically connected to collector.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to turn on.
2	Collector	Main high-voltage current path; electrically tied to metal tab for direct heatsink mounting and thermal conduction.
3	Emitter	Common reference terminal; typically connected to positive rail in high-side switch configurations.
4	Collector	Second collector connection for enhanced current sharing and reduced package inductance in high-current paths.

Key Features

Feature	Design Value
TO-220 plastic package	Industry-standard mechanical footprint enabling drop-in replacement in legacy audio and SMPS designs with proven manufacturability.
PNP complement to TIP47–TIP50 series	Enables balanced push-pull output stages when paired with NPN counterparts, supporting symmetrical Class AB amplifier topologies.
300 V V_CEO rating	Supports direct integration into 240 VAC rectified bus applications without additional voltage clamping circuitry.
RoHS-compliant Pb-free construction	Meets global environmental compliance requirements without sacrificing thermal or electrical performance in production assemblies.
150°C max junction temperature	Allows operation in high-ambient environments such as enclosed power supplies or industrial control cabinets with limited airflow.

Applications

Audio Output Amplifier	Switch-Mode Power Supply Driver
Use Scenario: High-fidelity line-operated audio amplifier output stage delivering 10–20 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: PNP output transistor in complementary pair configuration providing current sourcing capability during positive half-cycle. Use Value: 300 V rating accommodates peak rectified AC line voltages; low V_CE(sat) reduces thermal stress and improves efficiency in Class AB operation.	Use Scenario: Primary-side switching transistor in offline flyback or forward converter power supplies up to 50 W. IC Role / Device Role / Timing Role: High-voltage PNP switch controlling transformer primary current under PWM control from a dedicated controller IC. Use Value: 20 mJ unclamped inductive energy rating ensures reliable turn-off under transformer leakage inductance without snubber redesign.
DC Motor Control	High-Voltage Relay Driver
Use Scenario: H-bridge or single-ended driver for 24–48 V brushed DC motors in industrial automation equipment. IC Role / Device Role / Timing Role: High-side PNP switch enabling ground-referenced logic control while sourcing motor current to positive rail. Use Value: 1.0 A continuous current and 40 W dissipation support sustained motor stall conditions without thermal runaway.	Use Scenario: Solid-state replacement for electromechanical relays in HVAC control panels and building management systems. IC Role / Device Role / Timing Role: High-voltage switching element isolating 120/240 VAC control signals from low-voltage microcontroller outputs. Use Value: 300 V V_CEO and 5.0 V V_EB ratings ensure immunity to transients and allow direct optocoupler-driven base control.

Audio Output Amplifier

Switch-Mode Power Supply Driver

Use Scenario: High-fidelity line-operated audio amplifier output stage delivering 10–20 W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: PNP output transistor in complementary pair configuration providing current sourcing capability during positive half-cycle.

Use Value: 300 V rating accommodates peak rectified AC line voltages; low V_CE(sat) reduces thermal stress and improves efficiency in Class AB operation.

Use Scenario: Primary-side switching transistor in offline flyback or forward converter power supplies up to 50 W.

IC Role / Device Role / Timing Role: High-voltage PNP switch controlling transformer primary current under PWM control from a dedicated controller IC.

Use Value: 20 mJ unclamped inductive energy rating ensures reliable turn-off under transformer leakage inductance without snubber redesign.

DC Motor Control

High-Voltage Relay Driver

Use Scenario: H-bridge or single-ended driver for 24–48 V brushed DC motors in industrial automation equipment.

IC Role / Device Role / Timing Role: High-side PNP switch enabling ground-referenced logic control while sourcing motor current to positive rail.

Use Value: 1.0 A continuous current and 40 W dissipation support sustained motor stall conditions without thermal runaway.

Use Scenario: Solid-state replacement for electromechanical relays in HVAC control panels and building management systems.

IC Role / Device Role / Timing Role: High-voltage switching element isolating 120/240 VAC control signals from low-voltage microcontroller outputs.

Use Value: 300 V V_CEO and 5.0 V V_EB ratings ensure immunity to transients and allow direct optocoupler-driven base control.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJE5731	Higher V_CEO (350 V) and V_CB (350 V); identical package, pinout, and thermal specs.	Preferred for 277 VAC or higher rectified bus designs where margin beyond 300 V is required.	Select MJE5731 when operating voltage exceeds 260 VDC to maintain ≥20% safety margin over MJE5730's 300 V rating.
TIP42C	Lower V_CEO (100 V), lower P_D (65 W but derated to 2 W at T_A), same TO-220 package and pinout (Style 1).	Suitable only for low-voltage (<100 V) linear regulators or small-signal switching; not interchangeable in 300 V applications.	Use TIP42C only in legacy 24–48 V systems where cost sensitivity outweighs voltage headroom requirements.

Compared with MJE5731 and TIP42C, the MJE5730 offers optimal balance of 300 V capability, 40 W dissipation, and proven reliability in line-powered audio and SMPS-making it the preferred choice where 240 VAC-derived rails demand precise voltage margin without over-spec'ing.

Availability

MJE5730 is available at Aetrix Electronics and suitable for audio output amplifiers, switch-mode power supply drivers, and high-voltage relay drivers requiring stable component supply across industrial, consumer, and embedded power applications.

Supply support for MJE5730 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The MJE5730 belongs to onsemi's legacy high-voltage bipolar power transistor product line, engineered specifically for robust linear amplification and switching in mains-connected equipment where reliability under sustained thermal and voltage stress is critical.

FAQ

What is the maximum collector-emitter voltage rating for the MJE5730?

The MJE5730 has a maximum collector-emitter sustaining voltage (V_CEO(sus)) of 300 Vdc at I_C = 30 mA and I_B = 0. This rating is verified per the onsemi datasheet Rev. 9 and defines the absolute upper limit for safe DC operation. Exceeding this voltage risks avalanche breakdown and permanent device failure. The MJE5730 must be used with appropriate voltage derating in real-world circuits where transients or ripple may occur.

Is the MJE5730 pin-compatible with other TO-220 PNP transistors like the TIP42 series?

The MJE5730 uses TO-220 Case 221A Style 1 pinout (Base–Collector–Emitter–Collector), which differs from the TIP42C's Style 1 (Base–Collector–Emitter) - the MJE5730 has four leads with dual collector connections, while TIP42C has three. Therefore, the MJE5730 is not pin-compatible with TIP42C despite shared package outline. Direct replacement requires PCB layout revision to accommodate the fourth terminal and revised thermal pad routing.

What is the thermal resistance from junction to case for the MJE5730?

The MJE5730 has a maximum thermal resistance from junction to case (R_JC) of 3.125°C/W, measured under specified test conditions per the onsemi datasheet. This value assumes proper mounting to a heatsink using recommended torque and thermal interface material. Actual system-level R_JA will depend on heatsink size, airflow, and PCB copper area - the published R_JA of 62.5°C/W applies only to the bare device in free air.

Can the MJE5730 be used in inductive switching applications such as motor or relay control?

Yes, the MJE5730 is rated for 20 mJ of unclamped inductive load energy, as confirmed in Figure 10 of the official datasheet. This makes it suitable for driving inductive loads like relays or small DC motors when used with appropriate base drive and snubbing. However, designers must verify that actual circuit energy (½ × L × I²) remains within this limit and that second-breakdown SOA curves (Figure 5) are respected during turn-off transients.

Does the MJE5730 meet RoHS compliance requirements?

Yes, the MJE5730G variant is explicitly marked as Pb-free and RoHS compliant per onsemi's documentation (Publication Order Number MJE5730/D, Rev. 9). The "G" suffix denotes lead-free packaging, and the device meets EU Directive 2011/65/EU requirements. Compliance is verified through onsemi's internal material declarations and third-party testing; no exemptions apply to the base semiconductor or package materials.

MJE5730 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):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 300 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 200mA, 1A

Current - Collector Cutoff (Max):: 1mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 30 @ 300mA, 10V

Power - Max:: 40 W

Frequency - Transition:: 10MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

MJE5730 FAQ

1.How can I place an order for MJE5730 through Aetrix?

Please submit a Request for Quotation (RFQ) for MJE5730 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 MJE5730 reliable?

The price and inventory of MJE5730 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJE5730 is usually 5 days.

3.What payment methods are accepted for MJE5730?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJE5730 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJE5730?

MJE5730 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJE5730 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 MJE5730?

For technical support, including MJE5730 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJE5730 requirements.

6.How does Aetrix verify that MJE5730 is sourced from the original manufacturer or authorized distributors?

All MJE5730 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 MJE5730 meets industry standards.

7.What is the process for return or replacement of MJE5730?

All MJE5730 units undergo pre-shipment inspection (PSI). If there is an issue with MJE5730, 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 MJE5730 part is unused and in its original packaging.

Return procedure for MJE5730:

1.Submit a request within 90 days.

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

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