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

onsemi MJF45H11G

Name: MJF45H11G
Brand: onsemi
SKU: MJF45H11G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJF45H11G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3 Full Pack

Datasheet:: MJF45H11G.pdf

Description:: TRANS PNP 80V 10A TO-220FP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJF45H11G from onsemi is a PNP silicon power bipolar transistor in an isolated TO-220 Fullpak package, rated for 80 V V_CEO, 10 A continuous collector current, and 36 W power dissipation at T_C = 25°C, with V_CE(sat) ≤ 1.0 V at 8 A - used as a high-current switching or linear amplification device in DC-DC converter output stages and motor driver H-bridge low-side legs.

For engineers reviewing the MJF45H11G datasheet, pinout, applications, or equivalent options, key selection criteria include its complementary pairing with MJF44H11G, Pb-free TO-220 Fullpak isolation, thermal resistance R_JC = 3.5°C/W, and validated safe operating area up to 150°C junction temperature under pulsed conditions.

Technical Context

The MJF45H11G operates as a medium-power PNP bipolar junction transistor optimized for switching and linear amplification in isolated-package configurations. Its design supports fast turn-off (t_f = 100 ns) and low saturation voltage (V_CE(sat) ≤ 1.0 V), enabling efficient operation in hard-switched topologies where base drive capability and thermal management are critical.

It shares the same TO-220 Fullpak (Case 221D, Style 2) mechanical outline and thermal characteristics as its NPN complement MJF44H11G, including identical R_JC = 3.5°C/W and R_JA = 62.5°C/W ratings, and is specified across −55°C to +150°C junction temperature range with guaranteed h_FE ≥ 40 at I_C = 4 A and V_CE = 1 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum collector-emitter blocking voltage before breakdown; defines maximum supply rail compatibility in switching regulators.
I_C (Continuous)	10 A - Sustained collector current capability at T_C = 25°C; determines usable load current without forced cooling.
P_D @ T_C = 25°C	36 W - Total power dissipation limit with case heatsink; sets upper bound for conduction + switching loss budget.
V_CE(sat) @ I_C = 8 A	≤ 1.0 V - Low saturation voltage reduces conduction loss and heat generation in saturated-switch applications.
h_FE @ I_C = 4 A	≥ 40 - Minimum DC current gain ensures reliable base drive sizing for 8–10 A collector loads.
t_f	100 ns - Fast fall time enables operation at higher PWM frequencies with reduced switching loss.
R_JC	3.5°C/W - Junction-to-case thermal resistance enables direct mounting to heatsinks for thermal management.

Pinout & Package

Package: TO-220 Fullpak (Case 221D, Style 2), isolated construction with electrically insulated tab; Pb-free finish per onsemi's RoHS-compliant packaging standard.

Pin/Terminal	Circuit Role	Design Meaning
1 - Base	Control input terminal	Receives forward-biased base current to saturate the PNP transistor; requires negative voltage relative to emitter for turn-on.
2 - Collector	High-current output node	Connected to positive supply rail in common-emitter switch configuration; carries full load current during conduction.
3 - Emitter	Reference and current return path	Serves as circuit ground reference in low-side switch topology; electrically isolated from heatsink via package insulation.

Key Features

Feature	Design Value
Low V_CE(sat)	V_CE(sat) ≤ 1.0 V at 8 A ensures <1.0 W conduction loss per device, reducing thermal stress in parallel or high-duty-cycle operation.
Fast switching	100 ns fall time (t_f) and 135 ns combined delay+rise (t_d+t_r) support PWM frequencies up to ~1 MHz in non-resonant converters.
Complementary pairing	Designed as matched PNP counterpart to MJF44H11G (NPN), enabling simplified push-pull, H-bridge, and Class AB amplifier designs.
Isolated TO-220 Fullpak	Electrically insulated collector tab eliminates need for mica washers or insulating pads when mounted to shared heatsinks.
Extended temperature range	Rated for −55°C to +150°C operation, supporting industrial and automotive under-hood environments without derating.

Applications

DC-DC Converter Output Stage	H-Bridge Motor Driver
Use Scenario: High-current buck converter output stage delivering 5–20 A at 12–48 V to industrial actuators. IC Role / Device Role / Timing Role: PNP power switch in synchronous rectifier or complementary pair configuration, handling peak load current during low-side conduction. Use Value: Low V_CE(sat) minimizes conduction loss; isolated package simplifies heatsinking in multi-device layouts.	Use Scenario: Bidirectional 24 V DC motor control in automated gate systems or conveyor drives. IC Role / Device Role / Timing Role: Low-side PNP switch in one leg of an H-bridge, paired with MJF44H11G for complementary drive. Use Value: Matched h_FE and switching speed ensure balanced turn-on/turn-off timing between NPN/PNP legs, reducing shoot-through risk.
Linear Power Amplifier	Industrial Relay Driver
Use Scenario: Medium-power audio or signal amplification stage requiring >5 W output into resistive loads. IC Role / Device Role / Timing Role: Class AB output transistor biased in linear region, delivering analog current with minimal crossover distortion. Use Value: Stable h_FE across temperature (−40°C to +125°C) maintains bias point integrity without complex compensation.	Use Scenario: Driving 12–24 V, 5–8 A electromagnetic relays in PLC I/O modules or HVAC control panels. IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller GPIO to relay coil, providing galvanic isolation via package insulation. Use Value: 10 A peak rating accommodates relay inrush currents; 80 V V_CEO withstands inductive kickback without snubbers.

DC-DC Converter Output Stage

H-Bridge Motor Driver

Use Scenario: High-current buck converter output stage delivering 5–20 A at 12–48 V to industrial actuators.

IC Role / Device Role / Timing Role: PNP power switch in synchronous rectifier or complementary pair configuration, handling peak load current during low-side conduction.

Use Value: Low V_CE(sat) minimizes conduction loss; isolated package simplifies heatsinking in multi-device layouts.

Use Scenario: Bidirectional 24 V DC motor control in automated gate systems or conveyor drives.

IC Role / Device Role / Timing Role: Low-side PNP switch in one leg of an H-bridge, paired with MJF44H11G for complementary drive.

Use Value: Matched h_FE and switching speed ensure balanced turn-on/turn-off timing between NPN/PNP legs, reducing shoot-through risk.

Linear Power Amplifier

Industrial Relay Driver

Use Scenario: Medium-power audio or signal amplification stage requiring >5 W output into resistive loads.

IC Role / Device Role / Timing Role: Class AB output transistor biased in linear region, delivering analog current with minimal crossover distortion.

Use Value: Stable h_FE across temperature (−40°C to +125°C) maintains bias point integrity without complex compensation.

Use Scenario: Driving 12–24 V, 5–8 A electromagnetic relays in PLC I/O modules or HVAC control panels.

IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller GPIO to relay coil, providing galvanic isolation via package insulation.

Use Value: 10 A peak rating accommodates relay inrush currents; 80 V V_CEO withstands inductive kickback without snubbers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJF45H11	Same die and electrical specs; differs only in Pb-containing package (non-RoHS).	No functional difference; unsuitable for RoHS-compliant production.	Select MJF45H11G for new designs requiring lead-free compliance and long-term supply stability.
BDW93C	Lower V_CEO (60 V), lower I_C (8 A), higher V_CE(sat) (1.5 V max), TO-220 non-isolated package.	Limited to ≤60 V systems; requires insulating hardware for heatsink mounting.	Use BDW93C only if cost sensitivity outweighs voltage margin and thermal integration needs.

Compared with MJF45H11G, MJF45H11 offers identical performance but lacks RoHS compliance, while BDW93C trades voltage headroom, current capacity, and thermal integration for lower cost - making MJF45H11G the optimal choice for new industrial designs requiring reliability, isolation, and regulatory alignment.

Availability

MJF45H11G is available at Aetrix Electronics and suitable for DC-DC converters, motor drivers, linear amplifiers, and relay drivers requiring stable component supply, RoHS compliance, and isolated TO-220 thermal performance.

Supply support for MJF45H11G 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 IoT applications.

The MJF45H11G belongs to onsemi's complementary power transistor family designed specifically for isolated-package switching and amplification in rugged industrial power systems - emphasizing thermal robustness, parametric matching, and long-lifecycle availability.

FAQ

What is the pin configuration of the MJF45H11G?

The MJF45H11G uses TO-220 Fullpak Style 2 pinout: Pin 1 is Base, Pin 2 is Collector, and Pin 3 is Emitter. The collector tab is electrically isolated from the leads, allowing direct mounting to a common heatsink without insulating hardware - a key feature confirmed in the onsemi mechanical drawing 221D-03.

Does the MJF45H11G have RoHS compliance?

Yes, the "G" suffix in MJF45H11G explicitly denotes a Pb-free package per onsemi's RoHS-compliant manufacturing standard. This is documented in the ordering information section and marking diagram of the official datasheet (Rev. 7, October 2024), and verified across Digi-Key, Mouser, and onsemi.com product listings.

What is the maximum junction temperature for the MJF45H11G?

The MJF45H11G has a specified operating and storage junction temperature range of −55°C to +150°C, with safe operating area curves validated up to T_J(pk) = 150°C under pulsed conditions. This rating is confirmed in the Maximum Ratings table and Figure 2 of the onsemi datasheet.

How does the MJF45H11G compare to the MJF44H11G in terms of electrical specs?

The MJF45H11G (PNP) and MJF44H11G (NPN) are complementary devices with symmetric absolute maximum ratings (80 V V_CEO/V_EBO, 10 A I_C, 36 W P_D) and closely matched dynamic parameters - e.g., t_f = 100 ns (MJF45H11G) vs. t_f = 140 ns (MJF44H11G), f_T = 40 MHz vs. 50 MHz - enabling balanced push-pull and H-bridge designs.

Can the MJF45H11G be used in linear amplifier applications?

Yes, the MJF45H11G is characterized for linear operation with h_FE ≥ 40 at I_C = 4 A and V_CE = 1 V, and exhibits stable gain over temperature (−40°C to +125°C) as shown in Figure 7 of the datasheet - making it suitable for Class AB audio or precision current-source amplifier stages where thermal tracking matters.

MJF45H11G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 10 A

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 400mA, 8A

Current - Collector Cutoff (Max):: 1µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 4A, 1V

Power - Max:: 2 W

Frequency - Transition:: 40MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

MJF45H11G FAQ

1.How can I place an order for MJF45H11G through Aetrix?

Please submit a Request for Quotation (RFQ) for MJF45H11G 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 MJF45H11G reliable?

The price and inventory of MJF45H11G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJF45H11G is usually 5 days.

3.What payment methods are accepted for MJF45H11G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJF45H11G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJF45H11G?

MJF45H11G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJF45H11G 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 MJF45H11G?

For technical support, including MJF45H11G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJF45H11G requirements.

6.How does Aetrix verify that MJF45H11G is sourced from the original manufacturer or authorized distributors?

All MJF45H11G 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 MJF45H11G meets industry standards.

7.What is the process for return or replacement of MJF45H11G?

All MJF45H11G units undergo pre-shipment inspection (PSI). If there is an issue with MJF45H11G, 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 MJF45H11G part is unused and in its original packaging.

Return procedure for MJF45H11G:

1.Submit a request within 90 days.

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

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