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

Nexperia USA Inc. MJD45H11AJ

Name: MJD45H11AJ
Brand: Nexperia USA Inc.
SKU: MJD45H11AJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJD45H11AJ

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: MJD45H11AJ.pdf

Description:: TRANS PNP 80V 8A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJD45H11AJ from Nexperia is a PNP high-power bipolar transistor in DPAK (SOT428C) package, rated for −80 V V_CEO, −8 A continuous collector current, and 20 W junction-to-mounting-base power dissipation. It serves as a robust load switch or linear-mode regulator in automotive and industrial power stages, with AEC-Q101 qualification and low −1 V V_CEsat at −8 A.

For engineers reviewing the MJD45H11AJ datasheet, MJD45H11AJ pinout, MJD45H11AJ application, or MJD45H11AJ equivalent, key selection criteria include verified thermal resistance (R_th(j-mb) = 6.25 K/W), fast switching (t_off = 380 ns), AEC-Q101 compliance, and mounting-base–integrated collector topology for heatsink-coupled thermal management.

Technical Context

This device operates as a high-current PNP switch with DC current gain (h_FE) of 60 at −2 A and 40 at −4 A, enabling precise base-driven control in linear and saturated modes. Its −6 V V_EBO rating supports stable biasing in high-side configurations where emitter voltage swings near rail.

The DPAK package integrates the mounting base electrically with the collector terminal, establishing a direct thermal path to heatsinks while defining a fixed 3-pin layout (B–C–E). Transient thermal impedance data confirms suitability for pulsed loads up to 16 A peak with controlled duty cycles.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V - Maximum safe collector-emitter blocking voltage with open base; enables use in 48 V automotive and industrial bus applications.
I_C	−8 A - Continuous collector current rating at T_mb ≤ 25 °C; defines steady-state load-handling capability in relay replacement or motor drive.
V_CEsat	−1 V @ −8 A / −400 mA - Low saturation voltage minimizes conduction loss and self-heating during on-state operation.
h_FE	60 @ −2 A - Sufficient DC gain for direct microcontroller GPIO drive without external pre-biasing in many load-switch designs.
R_th(j-mb)	6.25 K/W - Thermal resistance from junction to mounting base; allows 20 W dissipation with ≤125 K temperature rise above heatsink surface.
f_T	80 MHz - Transition frequency supports switching above audio range; suitable for PWM-based constant-current backlight drivers.
AEC-Q101	Qualified - Meets stress-test requirements for automotive discrete semiconductors, including temperature cycling and HTRB.

Pinout & Package

Package: DPAK (SOT428C), surface-mount plastic package with integrated mounting base electrically connected to the collector. Dimensions: 6.73 mm × 4.725 mm × 2.45 mm (L × W × H); 3 leads (lead 1 cropped per standard DPAK configuration).

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input node; requires negative base current relative to emitter to turn on PNP device.
2	Collector (C)	Main power output terminal; internally bonded to mounting base for thermal and electrical connection to heatsink.
3	Emitter (E)	High-side reference node; typically tied to positive supply rail in high-side switch configurations.
Mounting Base (mb)	Collector (C)	Electrically and thermally identical to Pin 2; must be soldered to copper pour or heatsink for rated power handling.

Key Features

Feature	Design Value
High thermal power dissipation	20 W junction-to-mounting-base rating enables direct heatsink coupling without thermal interface pads in many industrial designs.
Low V_CEsat	−1 V at −8 A reduces I²R losses by >30% versus legacy PNP transistors, improving efficiency in linear regulators and constant-current drivers.
Fast switching	t_off = 380 ns allows PWM operation up to ~250 kHz, supporting compact LED backlight dimming and brushed DC motor control.
AEC-Q101 qualification	Validated for automotive under-hood environments including temperature cycling (−40 °C to +150 °C) and high-temperature reverse bias life testing.
Electrically similar to MJD45H series	Drop-in compatible with existing MJD45H11A layouts and drive circuits, simplifying component refresh in legacy production.

Applications

Automotive Load Switch

Linear Mode Voltage Regulator

Use Scenario: High-side power distribution for engine control module (ECM) auxiliary loads such as fuel pump drivers or solenoid actuators.

IC Role / Device Role / Timing Role: PNP power switch operating in saturation, controlled by MCU GPIO via base resistor network.

Use Value: −80 V V_CEO withstands load-dump transients; AEC-Q101 qualification ensures reliability in harsh automotive environments.

Use Scenario: Adjustable 5–12 V linear regulator for analog sensor biasing in ADAS camera modules.

IC Role / Device Role / Timing Role: Pass element configured in emitter-follower topology with op-amp feedback loop.

Use Value: Low −1 V V_CEsat extends dropout margin; R_th(j-mb) = 6.25 K/W supports stable regulation under 1.5 A load with minimal heatsink area.

Constant Current Backlight Drive

Brushed DC Motor Control

Use Scenario: PWM-controlled constant-current source for LCD display edge-lit LED strings in infotainment systems.

IC Role / Device Role / Timing Role: High-side current sink modulated at 1–20 kHz to regulate average LED current.

Use Value: f_T = 80 MHz ensures clean PWM edges; −50 µA I_CES at 150 °C prevents thermal runaway in sealed enclosures.

Use Scenario: H-bridge half-bridge leg for 24 V brushed DC window lift motors in passenger vehicles.

IC Role / Device Role / Timing Role: High-side PNP switch paired with NPN low-side complement (MJD44H11A) in complementary topology.

Use Value: −16 A I_CM peak rating handles motor stall currents; fast t_off limits shoot-through risk during bridge commutation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MJD45H11T4G	Same V_CEO (−80 V) and I_C (−8 A), but higher V_CEsat (−1.5 V typ.) and no AEC-Q101 qualification.	Not approved for automotive use; suitable only for industrial or consumer-grade linear regulators and load switches.	Select when cost sensitivity outweighs automotive qualification and thermal performance requirements.
STMicroelectronics BDX53C	Lower V_CEO (−100 V), same I_C (−8 A), but TO-126 through-hole package and slower switching (t_off > 1 µs).	Requires PCB real estate for through-hole mounting and lacks DPAK's thermal interface; unsuitable for space-constrained automotive modules.	Choose only for legacy through-hole designs where rework to SMT is not feasible.

Compared with MJD45H11AJ, the ON Semi part trades AEC-Q101 compliance and lower V_CEsat for lower cost, while the ST part sacrifices SMT compatibility and switching speed for higher voltage headroom-neither matches the combined automotive qualification, thermal performance, and surface-mount integration of the Nexperia device.

Availability

MJD45H11AJ is available at Aetrix Electronics and suitable for automotive load switching, industrial linear regulators, LED backlight drivers, and brushed DC motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MJD45H11AJ 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.

MJD45H11AJ belongs to Nexperia's AEC-Q101–qualified high-power bipolar transistor family, engineered specifically for robust high-side switching and linear regulation in demanding automotive and industrial power systems.

FAQ

Is MJD45H11AJ pin-compatible with MJD45H11A?

Yes, MJD45H11AJ shares identical DPAK (SOT428C) pinout, package dimensions, and electrical specifications with MJD45H11A. The "J" suffix denotes a specific tape-and-reel packaging variant per Nexperia's ordering system, not a functional or mechanical change.

Can MJD45H11AJ be used in parallel for higher current?

No-MJD45H11AJ lacks built-in emitter ballasting resistors and exhibits negative temperature coefficient behavior in saturation, making forced current sharing unreliable without external balancing components. Parallel operation requires individual base resistors and thermal coupling verification.

What is the maximum allowable PCB copper area for optimal thermal performance?

For rated 20 W dissipation, Nexperia specifies a minimum 1 cm² tin-plated copper pad on FR4 PCB (single-sided, 35 µm thickness) connected directly to the mounting base. Larger copper areas further reduce R_th(j-a), but mounting to an external heatsink remains necessary for sustained >5 W operation.

Does MJD45H11AJ support pulse-width modulation at 20 kHz?

Yes-its 380 ns t_off and 80 MHz f_T enable clean 20 kHz PWM operation with <5% dead-time overhead. However, gate/base drive strength must deliver ≥−400 mA peak base current to maintain saturation during full-load transitions.

MJD45H11AJ Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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):: 1µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 2A, 1V

Power - Max:: 1.75 W

Frequency - Transition:: 80MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

MJD45H11AJ FAQ

1.How can I place an order for MJD45H11AJ through Aetrix?

Please submit a Request for Quotation (RFQ) for MJD45H11AJ 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 MJD45H11AJ reliable?

The price and inventory of MJD45H11AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD45H11AJ is usually 5 days.

3.What payment methods are accepted for MJD45H11AJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD45H11AJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJD45H11AJ?

MJD45H11AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJD45H11AJ 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 MJD45H11AJ?

For technical support, including MJD45H11AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD45H11AJ requirements.

6.How does Aetrix verify that MJD45H11AJ is sourced from the original manufacturer or authorized distributors?

All MJD45H11AJ 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 MJD45H11AJ meets industry standards.

7.What is the process for return or replacement of MJD45H11AJ?

All MJD45H11AJ units undergo pre-shipment inspection (PSI). If there is an issue with MJD45H11AJ, 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 MJD45H11AJ part is unused and in its original packaging.

Return procedure for MJD45H11AJ:

1.Submit a request within 90 days.

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

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