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

Nexperia USA Inc. MJD41CJ

Name: MJD41CJ
Brand: Nexperia USA Inc.
SKU: MJD41CJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJD41CJ

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: MJD41CJ.pdf

Description:: TRANS NPN 100V 6A DPAK

Quantity:: RFQ Add To RFQ list

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Inventory:12,251

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Product details

Overview

MJD41CJ from Nexperia is an NPN high-power bipolar transistor in DPAK (SOT428C) surface-mount package, rated for 100 V V_CEO, 6 A continuous collector current, and 15 W junction-to-mounting-base power dissipation. It serves as a robust load switch or linear-mode voltage regulator in industrial power management systems requiring stable thermal performance under sustained conduction.

For engineers reviewing the MJD41CJ datasheet, MJD41CJ pinout, MJD41CJ application, or MJD41CJ equivalent, key selection criteria include its low 1.5 V V_CE(sat) at 6 A/600 mA drive, 9 K/W R_th(j-mb) thermal resistance, and compatibility with FR4 PCBs using 1 cm² tin-plated copper mounting pads - critical for motor drive and relay replacement designs.

Technical Context

This device operates as a single NPN silicon bipolar junction transistor optimized for high-current switching and linear regulation. Its DC current gain (h_FE) is 15 min at 3 A and 30 min at 0.3 mA, with f_T of 3 MHz and h_fe of 20 typical at 500 mA/10 V, supporting moderate-frequency control loops.

Thermal design centers on the mounting base (pin 3), which is electrically connected to the collector and provides a low-impedance path to heatsinking. Power derating follows a linear curve from 15 W at T_mb ≤ 25 °C to zero at 150 °C junction temperature, per IEC601134 absolute maximum ratings.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum safe collector-emitter voltage with base open; defines breakdown margin in high-voltage load switching.
I_C	6 A - Continuous collector current rating; sets upper bound for steady-state power delivery in linear or switched operation.
V_CE(sat)	1.5 V max at I_C = 6 A, I_B = 600 mA - Low saturation voltage minimizes conduction loss and heat generation in load-switch applications.
R_th(j-mb)	9 K/W - Thermal resistance from junction to mounting base; enables direct heatsink attachment without isolation washers.
h_FE	15 min at I_C = 3 A - Minimum DC current gain ensures reliable base drive sizing for 6 A switching without excessive IB overhead.
f_T	3 MHz - Transition frequency limits usable bandwidth for analog amplification or high-speed switching above ~300 kHz.
P_tot (j-mb)	15 W - Total power dissipation capability when mounted to heatsink via base; supports high-duty-cycle linear regulation.

Pinout & Package

The MJD41CJ uses a DPAK (SOT428C) plastic surface-mount package with three leads and an exposed metal mounting base electrically tied to the collector. The package measures 6.47 mm × 4.45 mm × 2.55 mm and is designed for reflow soldering onto FR4 PCBs with a dedicated 1 cm² tin-plated copper pad.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal; requires ≥600 mA drive current to saturate at 6 A collector load.
2	Collector (C)	Main power input terminal; internally connected to mounting base for thermal and electrical conduction.
3	Emitter (E)	Power return path; referenced to system ground in common-emitter configurations.
Mounting Base (mb)	Collector (C)	Exposed metal pad on underside; must be soldered to PCB copper area for thermal management and electrical connection to collector.

Key Features

Feature	Design Value
High thermal power dissipation	15 W junction-to-mounting-base rating enables direct heatsink coupling without thermal interface materials.
Low V_CE(sat)	1.5 V max at full 6 A load reduces conduction losses by >30% vs. comparable transistors with >2 V saturation.
Fast switching speeds	3 MHz f_T and sub-microsecond turn-on/off times support PWM frequencies up to 300 kHz in motor drive inverters.
Electrically similar to MJD41 series	Pin-compatible and parametrically aligned with legacy MJD41 variants, easing drop-in replacement in existing designs.

Applications

Power Management

Motor Drive

Use Scenario: Regulating 24 V DC bus voltage for industrial PLC I/O modules using linear pass configuration.

IC Role / Device Role / Timing Role: NPN bipolar transistor operating in active region as adjustable series pass element.

Use Value: Delivers stable output with <1.5 V dropout at 6 A while dissipating ≤9 W with standard PCB copper heatsinking.

Use Scenario: Driving brushed DC motors in automated conveyor systems requiring bidirectional control via H-bridge topology.

IC Role / Device Role / Timing Role: High-side or low-side switching element handling 6 A peak stall current during acceleration.

Use Value: Enables efficient commutation with 1.5 V V_CE(sat) limiting resistive loss to <9 W per device at full load.

Load Switch

Constant Current Drive

Use Scenario: Enabling/disabling 48 V auxiliary power rails in telecom equipment with soft-start and overcurrent protection.

IC Role / Device Role / Timing Role: Main power switch controlled by microcontroller GPIO through base resistor network.

Use Value: Supports rapid turn-on with 600 mA base drive and withstands 100 V transients without clamping diodes.

Use Scenario: Providing regulated 350 mA constant current to LED backlight arrays in medical display panels.

IC Role / Device Role / Timing Role: Linear current source configured with emitter degeneration resistor and feedback control.

Use Value: Maintains ±3% current accuracy across −55 °C to 150 °C ambient due to stable h_FE and low thermal drift.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD41CT	Tape-and-reel packaging variant; identical electrical specs and thermal characteristics.	No functional difference; selected only for automated SMT assembly line compatibility.	Choose MJD41CT when purchasing for high-volume pick-and-place production.
STP16NF06L	N-channel MOSFET with 60 V V_DS, 16 A I_D, and 0.05 Ω R_DS(on); gate-driven, no base current required.	Lower conduction loss at light loads but requires level-shifting for high-side use; unsuitable for linear regulation.	Prefer STP16NF06L for high-efficiency switching; retain MJD41CJ where analog control or linear operation is needed.

Compared with MJD41CT, the MJD41CJ offers identical performance in tube packaging for prototyping and low-volume builds; versus STP16NF06L, it trades higher conduction loss for simpler drive architecture and inherent linear-mode capability - critical for voltage regulation and analog current sourcing.

Availability

MJD41CJ is available at Aetrix Electronics and suitable for power management, motor drive, and load switch applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial embedded systems.

Supply support for MJD41CJ 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The MJD41CJ belongs to Nexperia's high-power bipolar transistor product line, engineered for ruggedized industrial power control where thermal robustness, parametric stability, and proven field reliability are essential.

FAQ

What is the maximum allowable junction temperature for the MJD41CJ?

The absolute maximum junction temperature (T_j) is 150 °C, as defined in IEC601134 limiting values. Operation beyond this threshold risks permanent degradation of h_FE, increased leakage, and bond wire failure. Derating curves require reducing P_tot linearly to zero at 150 °C mounting base temperature.

Can the MJD41CJ be used in linear voltage regulation mode?

Yes - its 15 W junction-to-mounting-base power dissipation, stable h_FE across temperature, and low 1.5 V V_CE(sat) make it suitable for linear pass regulation. Designers must ensure adequate PCB copper area (1 cm² tin-plated pad) and verify thermal rise under worst-case load and ambient conditions.

Is the mounting base electrically isolated from the collector?

No - the mounting base (mb) is internally connected to the collector (pin 2). This requires electrical isolation of the heatsink or PCB mounting pad from other circuit potentials unless the collector node is at system ground or a common reference potential.

What is the recommended solder footprint for the MJD41CJ's DPAK package?

The official Nexperia reflow footprint specifies a 6.125 mm × 4.725 mm solder land with 1.15 mm solder mask opening and 5.65 mm × 2.4 mm paste stencil aperture. A 1 cm² tin-plated copper pad beneath the mounting base is mandatory for thermal compliance and mechanical reliability.

MJD41CJ 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:: NPN

Current - Collector (Ic) (Max):: 6 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 600mA, 6A

Current - Collector Cutoff (Max):: 1µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 30 @ 300µA, 4V

Power - Max:: 1.6 W

Frequency - Transition:: 3MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

MJD41CJ FAQ

1.How can I place an order for MJD41CJ through Aetrix?

Please submit a Request for Quotation (RFQ) for MJD41CJ 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 MJD41CJ reliable?

The price and inventory of MJD41CJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD41CJ is usually 5 days.

3.What payment methods are accepted for MJD41CJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD41CJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJD41CJ?

MJD41CJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJD41CJ 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 MJD41CJ?

For technical support, including MJD41CJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD41CJ requirements.

6.How does Aetrix verify that MJD41CJ is sourced from the original manufacturer or authorized distributors?

All MJD41CJ 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 MJD41CJ meets industry standards.

7.What is the process for return or replacement of MJD41CJ?

All MJD41CJ units undergo pre-shipment inspection (PSI). If there is an issue with MJD41CJ, 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 MJD41CJ part is unused and in its original packaging.

Return procedure for MJD41CJ:

1.Submit a request within 90 days.

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

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