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Nexperia USA Inc. MJD41C-QJ
- Part No.:
- MJD41C-QJ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MJD41C-QJ.pdf
- Description:
- TRANS NPN 100V 10A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,586
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Product details
Overview
MJD41C-QJ from Nexperia is a 100 V, 6 A NPN high-power bipolar transistor in DPAK (SOT428C) surface-mount package, designed for automotive-grade load switching and linear voltage regulation. It delivers 15 W junction-to-mounting-base power dissipation, 15 minimum DC current gain at 3 A, and 1.5 V collector-emitter saturation voltage at 6 A/600 mA drive - enabling robust thermal performance in motor drive and relay replacement circuits.
For engineers reviewing the MJD41C-QJ datasheet, MJD41C-QJ pinout, MJD41C-QJ application, or MJD41C-QJ equivalent, key selection criteria include its AEC-Q101 qualification, low VCE(sat) under high-current pulsed operation, thermal resistance of 9 K/W (junction-to-mounting base), and compatibility with FR4 PCBs using 1 cm² tin-plated copper pads.
Technical Context
This NPN power transistor operates in linear and switching modes with specified DC current gain (hFE) of ≥15 at IC = 3 A and VCE = 4 V, and supports peak collector currents up to 10 A in single-pulse conditions (tp ≤ 1 ms). Its low VCE(sat) of 1.5 V at IC = 6 A and IB = 600 mA enables efficient conduction in high-current load-switching applications.
Thermally, it features Rth(j-mb) = 9 K/W in free air and Rth(j-a) = 79 K/W on FR4 PCB, with maximum junction temperature of 150 °C and storage range from −65 °C to 150 °C. The mounting base is electrically connected to the collector, requiring isolation-aware PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum safe collector-emitter voltage with open base; defines breakdown margin in 48 V automotive systems. |
| IC | 6 A continuous - Rated collector current at Tmb ≤ 25 °C; sets steady-state load capacity for relay replacement. |
| VCE(sat) | 1.5 V @ IC=6 A, IB=600 mA - Low saturation voltage minimizes conduction loss and heatsink requirements. |
| hFE | ≥15 @ VCE=4 V, IC=3 A - Ensures sufficient DC gain for base-drive efficiency in linear regulator designs. |
| Ptot (j-mb) | 15 W - Junction-to-mounting-base power dissipation limit; requires direct thermal pad connection for full rating. |
| Rth(j-mb) | 9 K/W - Thermal resistance from junction to mounting base; enables precise thermal design when mounted to heatsink. |
| AEC-Q101 | Qualified - Meets stress-test requirements for discrete semiconductors in automotive applications. |
Pinout & Package
Package: DPAK (SOT428C), surface-mount plastic package with integral mounting base connected to collector. Dimensions: 10.40 × 6.73 × 2.38 mm (L × W × H); 3-terminal configuration with lead 1 cropped per ordering specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (B) | Base | Control terminal for bias current; requires current-limited drive to achieve target IC/IB ratio. |
| 2 (C) | Collector | Main current input; electrically tied to mounting base - must be isolated from PCB ground plane unless intended as common reference. |
| 3 (E) | Emitter | Current return path; referenced to system ground in low-side switch configurations. |
| Mounting Base (mb) | Collector Tie | Integral metal pad thermally and electrically connected to collector; mandatory for thermal performance and must be soldered to copper area ≥1 cm². |
Key Features
| Feature | Design Value |
|---|---|
| High thermal power dissipation | 15 W junction-to-mounting-base rating enables compact heatsinking in space-constrained automotive modules. |
| Low VCE(sat) | 1.5 V at 6 A reduces conduction losses by >30% vs. legacy 2 V saturation devices, improving efficiency in constant-current backlight drivers. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock - eliminates need for additional qualification testing. |
| Fast switching speeds | fT = 3 MHz and typical ton/toff < 1 µs support PWM-based motor control up to ~50 kHz without excessive switching loss. |
| Electrically similar to MJD41 series | Drop-in replacement for legacy MJD41C with identical pinout and improved thermal specs - simplifies BOM rationalization. |
Applications
| Automotive Load Switch | Linear Mode Voltage Regulator |
|---|---|
|
Use Scenario: High-side power distribution for HVAC actuators and lighting modules in 12 V/24 V vehicle networks. IC Role / Device Role / Timing Role: NPN power switch operating in saturation mode, controlled via microcontroller GPIO with base resistor network. Use Value: 100 V VCEO provides margin against load-dump transients; 15 W thermal rating allows direct mounting to chassis without external heatsink. |
Use Scenario: Adjustable 5–12 V linear regulator supplying analog sensors and microcontrollers in engine control units. IC Role / Device Role / Timing Role: Pass transistor in series-regulator topology, dissipating excess voltage as heat under constant current load. Use Value: Low 1.5 V VCE(sat) limits dropout voltage and improves regulation efficiency at 3 A output; AEC-Q101 ensures reliability over 15-year vehicle life. |
| Constant-Current Backlight Drive | DC Motor Drive (Small Actuators) |
|
Use Scenario: LED backlight driver for instrument cluster displays requiring stable current across temperature. IC Role / Device Role / Timing Role: Current-source transistor in emitter-follower configuration with precision sense resistor feedback. Use Value: hFE ≥15 at 3 A ensures predictable base current demand; tight VBE variation (<0.4 V) across −55 °C to 150 °C maintains current accuracy. |
Use Scenario: Bidirectional brushed DC motor control in seat adjusters and mirror actuators using H-bridge with discrete transistors. IC Role / Device Role / Timing Role: Low-side switching element in half-bridge leg, driven by gate driver IC with fast turn-on/turn-off. Use Value: 10 A peak ICM supports stall-current surges; fT = 3 MHz enables clean PWM edges at 20 kHz, reducing audible noise and EMI. |
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 |
|---|---|---|---|
| ON Semiconductor MJD41CT4G | Same VCEO (100 V), lower IC (4 A), higher VCE(sat) (2.0 V @ 4 A), no AEC-Q101 qualification. | Not rated for automotive; suitable only for industrial/commercial linear regulators or low-duty-cycle switching. | Select when cost sensitivity outweighs automotive compliance and thermal performance requirements. |
| STMicroelectronics BD139 | Lower VCEO (80 V), same IC (1.5 A continuous), TO-126 through-hole package, no automotive qualification. | Limited to non-automotive 24 V systems; incompatible with SMT assembly and thermal pad requirements. | Choose only for legacy through-hole designs where board rework is acceptable and voltage margin is sufficient. |
Compared with MJD41C-QJ, the MJD41CT4G offers lower cost but sacrifices 33% current rating, higher conduction loss, and automotive qualification; the BD139 lacks SMT compatibility, thermal pad integration, and fails to meet modern automotive transient voltage requirements.
Availability
MJD41C-QJ is available at Aetrix Electronics and suitable for automotive load switching, linear voltage regulation, and constant-current backlight drive applications requiring stable component supply, AEC-Q101 compliance, and high thermal reliability.
Supply support for MJD41C-QJ 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, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The MJD41C-QJ belongs to Nexperia's AEC-Q101-qualified high-power bipolar transistor family, engineered specifically for automotive power management where thermal robustness, transient immunity, and long-term reliability are critical.
FAQ
Is MJD41C-QJ compatible with standard DPAK footprints?
Yes - MJD41C-QJ uses the SOT428C (DPAK) package with standardized dimensions (10.40 × 6.73 mm) and footprint per Nexperia's recommended reflow land pattern (6.125 × 4.725 mm solder lands, 1.15 mm pad spacing). The mounting base must be soldered to a ≥1 cm² copper area for thermal compliance.
What is the maximum allowable base current for continuous operation?
The datasheet specifies IB = 600 mA for VCE(sat) testing at IC = 6 A, but continuous base current must be limited to avoid junction overheating. With hFE ≥15, 400 mA base current suffices for 6 A collector drive; sustained >500 mA requires thermal derating per Fig. 1 power derating curves.
Can MJD41C-QJ be used in high-side switch configurations?
Yes - its 100 V VCEO and low VCE(sat) support high-side operation, but the mounting base is tied to the collector. This requires isolation of the thermal pad from ground and careful gate/base driver design to handle floating emitter voltage during switching transitions.
Does MJD41C-QJ require external snubber circuitry in inductive load switching?
Yes - when switching inductive loads like motors or relays, a flyback diode (e.g., BYV26E) must be placed across the load to clamp inductive kickback. The 100 V VCEO provides margin, but unclamped transients exceeding this rating will cause immediate failure.
MJD41C-QJ 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):
- 10 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MJD41C-QJ FAQ
1.How can I place an order for MJD41C-QJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD41C-QJ 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 MJD41C-QJ reliable?
The price and inventory of MJD41C-QJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD41C-QJ is usually 5 days.
3.What payment methods are accepted for MJD41C-QJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD41C-QJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD41C-QJ?
MJD41C-QJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD41C-QJ 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 MJD41C-QJ?
For technical support, including MJD41C-QJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD41C-QJ requirements.
6.How does Aetrix verify that MJD41C-QJ is sourced from the original manufacturer or authorized distributors?
All MJD41C-QJ 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 MJD41C-QJ meets industry standards.
7.What is the process for return or replacement of MJD41C-QJ?
All MJD41C-QJ units undergo pre-shipment inspection (PSI). If there is an issue with MJD41C-QJ, 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 MJD41C-QJ part is unused and in its original packaging.
Return procedure for MJD41C-QJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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