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

onsemi MJD45H11TF

Name: MJD45H11TF
Brand: onsemi
SKU: MJD45H11TF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJD45H11TF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: MJD45H11TF.pdf

Description:: TRANS PNP 80V 8A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJD45H11TF from ON Semiconductor is a PNP epitaxial silicon power transistor in TO-252 (DPAK) package, rated for -80 V V_CEO, -8 A I_C, and 20 W P_C at T_C = 25°C, with low -1 V V_CE(sat) at -8 A/-0.4 A drive-used in high-current switching stages of industrial motor drivers and DC-DC converter output stages.

For engineers reviewing the MJD45H11TF datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, fast switching timing (t_ON = 135 ns), saturation voltage performance, and surface-mount DPAK layout guidance for high-reliability power stage design.

Technical Context

The MJD45H11TF operates as a medium-power PNP bipolar junction transistor optimized for linear and saturated switching in high-side configurations. Its -80 V blocking capability and -8 A continuous collector current support robust operation in 24–48 V industrial control rails.

It features a 40 MHz f_T, 230 pF C_ob, and fast transient response (t_F = 100 ns), enabling use in PWM-driven inductive loads where storage time (t_STG = 500 ns) and turn-on delay must be tightly managed alongside base drive design.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-80 V - Maximum safe collector-emitter reverse bias before breakdown in open-base condition.
I_C (DC)	-8 A - Continuous collector current rating at T_C = 25°C; defines maximum steady-state load handling in power stages.
P_C (T_C = 25°C)	20 W - Maximum dissipation at case temperature 25°C; requires heatsinking above ~50°C ambient per derating curve.
V_CE(sat)	-1 V @ I_C = -8 A, I_B = -0.4 A - Low saturation voltage minimizes conduction loss in high-current switching applications.
h_FE	40–60 @ V_CE = -1 V - DC current gain range determines required base drive current for full saturation under load.
f_T	40 MHz - Transition frequency sets upper limit for small-signal amplification and high-speed switching fidelity.
t_ON/t_F	135 ns / 100 ns - Fast turn-on and fall times enable efficient operation up to ~500 kHz PWM frequencies in hard-switched topologies.

Pinout & Package

Package: TO-252-3L (DPAK), surface-mount, lead-formed for PCB assembly. Thermal pad on exposed drain tab (Pin 2) requires solder connection to copper pour for optimal heat transfer.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; requires sufficient negative current (-0.4 A typical) to saturate at full load.
2	Collector	Main current path input; connected to positive rail in high-side switch configuration.
3	Emitter	Current return path; tied to load or ground; forms common reference for base drive circuitry.

Key Features

Feature	Design Value
Low V_CE(sat)	-1 V at -8 A enables <1.5 W conduction loss per device in 48 V motor H-bridge legs.
DPAK surface-mount package	TO-252 footprint supports automated assembly and provides 20 W thermal capacity with proper PCB copper area.
Fast switching speed	135 ns t_ON and 100 ns t_F reduce switching losses in 100–500 kHz PWM inverters and SMPS outputs.
High V_CEO rating	-80 V withstand allows use in 48 V systems with >2× voltage margin against transients and inductive kickback.
Robust SOA	Safe operating area supports pulsed currents up to -16 A (ICP) without secondary breakdown in short-duration loads.

Applications

Industrial Motor Driver Output Stage	48 V DC-DC Converter High-Side Switch
Use Scenario: Driving brushed DC motors in PLC-controlled conveyors with 24–48 V supply and peak currents up to 8 A. IC Role / Device Role / Timing Role: PNP power switch in high-side configuration, controlled by microcontroller GPIO via level-shifting driver. Use Value: -1 V V_CE(sat) reduces heat generation vs. higher-V_CE(sat) alternatives, enabling compact heatsink-free designs at ≤5 A average load.	Use Scenario: High-side synchronous rectifier or pre-regulator switch in isolated 48 V → 12 V buck converters for telecom power supplies. IC Role / Device Role / Timing Role: Medium-speed switching element handling 5–8 A DC load with 100–300 kHz PWM duty cycling. Use Value: 40 MHz f_T and 135 ns t_ON ensure minimal dead-time distortion and stable regulation under dynamic load steps.
Automotive HVAC Blower Control	Industrial Solenoid Driver
Use Scenario: Controlling 12–24 V blower fan motors in commercial vehicle climate systems with PWM speed regulation. IC Role / Device Role / Timing Role: High-side PNP switch interfaced to automotive-grade MCU with integrated base resistor network. Use Value: -80 V V_CEO accommodates load dump transients up to 65 V, meeting ISO 7637-2 Pulse 5a requirements without external clamping.	Use Scenario: Driving 24 V solenoid valves in factory automation panels requiring 5–7 A inrush current and sustained hold current. IC Role / Device Role / Timing Role: Saturated switch delivering full coil current with minimal voltage drop across collector-emitter junction. Use Value: 230 pF C_ob and 500 ns t_STG allow predictable turn-off timing when paired with active base pull-down, preventing valve chatter.

Industrial Motor Driver Output Stage

48 V DC-DC Converter High-Side Switch

Use Scenario: Driving brushed DC motors in PLC-controlled conveyors with 24–48 V supply and peak currents up to 8 A.

IC Role / Device Role / Timing Role: PNP power switch in high-side configuration, controlled by microcontroller GPIO via level-shifting driver.

Use Value: -1 V V_CE(sat) reduces heat generation vs. higher-V_CE(sat) alternatives, enabling compact heatsink-free designs at ≤5 A average load.

Use Scenario: High-side synchronous rectifier or pre-regulator switch in isolated 48 V → 12 V buck converters for telecom power supplies.

IC Role / Device Role / Timing Role: Medium-speed switching element handling 5–8 A DC load with 100–300 kHz PWM duty cycling.

Use Value: 40 MHz f_T and 135 ns t_ON ensure minimal dead-time distortion and stable regulation under dynamic load steps.

Automotive HVAC Blower Control

Industrial Solenoid Driver

Use Scenario: Controlling 12–24 V blower fan motors in commercial vehicle climate systems with PWM speed regulation.

IC Role / Device Role / Timing Role: High-side PNP switch interfaced to automotive-grade MCU with integrated base resistor network.

Use Value: -80 V V_CEO accommodates load dump transients up to 65 V, meeting ISO 7637-2 Pulse 5a requirements without external clamping.

Use Scenario: Driving 24 V solenoid valves in factory automation panels requiring 5–7 A inrush current and sustained hold current.

IC Role / Device Role / Timing Role: Saturated switch delivering full coil current with minimal voltage drop across collector-emitter junction.

Use Value: 230 pF C_ob and 500 ns t_STG allow predictable turn-off timing when paired with active base pull-down, preventing valve chatter.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD44H11TF	-60 V V_CEO, same package and pinout, lower voltage rating	Suitable only for ≤36 V systems; not recommended for 48 V industrial rails with transients	Select when cost sensitivity outweighs voltage margin needs in low-voltage control modules.
PN3565	TO-92 package, -30 V V_CEO, -0.5 A I_C, much lower power capability	Limited to signal-level or low-current switching; cannot replace MJD45H11TF in power stages	Use only for prototyping or auxiliary logic-level functions-not as functional substitute.

Compared with MJD44H11TF and PN3565, the MJD45H11TF uniquely balances -80 V ruggedness, -8 A current, and DPAK thermal performance for industrial-grade high-side switching-neither alternative matches its combination of voltage headroom, current capacity, and surface-mount thermal management.

Availability

MJD45H11TF is available at Aetrix Electronics and suitable for industrial motor drivers, 48 V DC-DC converters, and automotive HVAC blower control requiring stable component supply and long-term production continuity.

Supply support for MJD45H11TF 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MJD45H11TF belongs to ON Semiconductor's legacy Fairchild power transistor portfolio, designed specifically for high-reliability, medium-power linear and switching applications in harsh industrial environments.

FAQ

What is the maximum continuous collector current for the MJD45H11TF?

The MJD45H11TF has a maximum continuous collector current (I_C) of -8 A at case temperature T_C = 25°C. Derating applies above 25°C per the published power derating curve-e.g., at T_C = 100°C, usable I_C drops to approximately -4.5 A. This rating assumes proper PCB copper area and thermal interface to maintain case temperature.

Does the MJD45H11TF require a heatsink in typical applications?

The MJD45H11TF can operate without an external heatsink at ≤3 W dissipation, but full-rated 20 W operation requires a low-thermal-resistance PCB layout: ≥250 mm² of 2-oz copper connected to the exposed collector tab (Pin 2). For sustained 8 A loads, a bolted heatsink or thermal pad is strongly advised to keep T_J below 150°C.

What is the base drive requirement to fully saturate the MJD45H11TF at 8 A collector current?

To achieve V_CE(sat) ≤ -1 V at I_C = -8 A, the MJD45H11TF requires I_B = -0.4 A. With h_FE = 40–60 at that operating point, a minimum forced beta (I_C/I_B) of 20 ensures reliable saturation. Base resistor selection must account for drive voltage swing and any series impedance in the control path.

Is the MJD45H11TF suitable for automotive applications?

The MJD45H11TF is qualified for industrial temperature range (-55°C to +150°C) and meets basic AEC-Q101 stress test expectations in practice, but it is not officially AEC-Q101 certified. It is widely used in non-safety-critical automotive HVAC and body control modules where -80 V V_CEO supports load-dump immunity-however, formal automotive qualification requires verification per OEM requirements.

How does the MJD45H11TF compare to NPN alternatives like the MJD127?

The MJD45H11TF is a PNP device intended for high-side switching, whereas the NPN MJD127 is suited for low-side configurations. Direct replacement is not possible without circuit topology changes. The MJD45H11TF offers superior -80 V rating vs. MJD127's -100 V, but its -8 A I_C and -1 V V_CE(sat) provide better conduction efficiency in matched high-side roles than most NPN-to-PMOS or NPN-to-PNP discrete alternatives.

MJD45H11TF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 8 A

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

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

Current - Collector Cutoff (Max):: 10µA

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

Power - Max:: 1.75 W

Frequency - Transition:: 40MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

MJD45H11TF FAQ

1.How can I place an order for MJD45H11TF through Aetrix?

Please submit a Request for Quotation (RFQ) for MJD45H11TF 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 MJD45H11TF reliable?

The price and inventory of MJD45H11TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD45H11TF is usually 5 days.

3.What payment methods are accepted for MJD45H11TF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD45H11TF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJD45H11TF?

MJD45H11TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJD45H11TF 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 MJD45H11TF?

For technical support, including MJD45H11TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD45H11TF requirements.

6.How does Aetrix verify that MJD45H11TF is sourced from the original manufacturer or authorized distributors?

All MJD45H11TF 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 MJD45H11TF meets industry standards.

7.What is the process for return or replacement of MJD45H11TF?

All MJD45H11TF units undergo pre-shipment inspection (PSI). If there is an issue with MJD45H11TF, 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 MJD45H11TF part is unused and in its original packaging.

Return procedure for MJD45H11TF:

1.Submit a request within 90 days.

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

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