My Inquiry
My Account
Nexperia USA Inc. MJD44H11J
- Part No.:
- MJD44H11J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MJD44H11J.pdf
- Description:
- TRANS NPN 80V 8A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:12,798
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MJD44H11J from Nexperia is an NPN high-power bipolar transistor in DPAK (SOT428C) package, rated for 80 V VCEO, 8 A continuous collector current, and 20 W junction-to-mounting-base power dissipation. It serves as a robust switching and linear-mode power device in industrial load control, motor drive, and constant-current backlight circuits.
For engineers reviewing the MJD44H11J datasheet, MJD44H11J pinout, MJD44H11J application, or MJD44H11J equivalent, key selection criteria include its low 1 V VCE(sat) at 8 A/400 mA drive, 160 MHz fT, fast 420 ns turn-off time, and thermal resistance of 6.25 K/W from junction to mounting base - critical for thermally constrained PCB layouts.
Technical Context
This discrete NPN BJT operates in active, saturation, and cutoff regions with DC current gain (hFE) ranging from 40 at 4 A to 60 at 2 A (VCE = 1 V, Tamb = 25 °C). Its switching behavior is characterized by 300 ns turn-on, 250 ns storage, and 170 ns fall times under defined test conditions (ICon = 0.5 mA, ICoff = −0.5 mA, VCC = 12.5 V).
Thermal design relies on direct mounting of the collector-connected metal base to a 1 cm² tin-plated copper pad on FR4 PCB, enabling 1.75 W ambient-rated dissipation and scalable derating per Fig. 1. The device is not automotive-qualified and is specified for −55 °C to +150 °C junction temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 80 V - Maximum safe collector-emitter voltage before breakdown; defines maximum supply rail compatibility in switch-mode or linear regulator designs. |
| IC | 8 A continuous - Sustained collector current capability with proper heatsinking; supports high-current loads like solenoids or DC motors. |
| VCE(sat) | 1 V at IC = 8 A, IB = 400 mA - Low saturation voltage minimizes conduction loss and heat generation in switching applications. |
| fT | 160 MHz - Transition frequency confirms usable bandwidth for medium-speed switching (e.g., PWM up to ~100 kHz with margin). |
| Rth(j-mb) | 6.25 K/W - Thermal resistance from junction to mounting base; enables precise thermal modeling when mounted to a defined copper area. |
| hFE | 60 at IC = 2 A - DC current gain sufficient for moderate base drive requirements in linear or saturated switch configurations. |
| toff | 420 ns - Total turn-off delay including storage time; determines minimum achievable switching period and switching loss profile. |
Pinout & Package
Package: DPAK (SOT428C), surface-mount plastic package with exposed collector-connected mounting base (mb); 3 leads (lead 1 cropped per ordering info).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (B) | Base | Control terminal; requires ≥400 mA DC drive for full saturation at 8 A collector current. |
| 2 (C) | Collector | Main high-current output node; electrically tied to mounting base (mb) for thermal and electrical connection to PCB copper. |
| 3 (E) | Emitter | Current return path; referenced to system ground or load common in low-side switch configurations. |
| mb | Mounting Base | Integral metal pad connected internally to collector; must be soldered to ≥1 cm² tin-plated copper for rated thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| High thermal power dissipation capability | 20 W junction-to-mounting-base rating enables compact high-power switching without external heatsink when PCB-mounted per spec. |
| Low collector-emitter saturation voltage | 1 V at 8 A reduces conduction loss to 8 W, improving efficiency over higher-VCE(sat) alternatives in 12–48 V systems. |
| Fast switching speeds | 420 ns total turn-off time supports PWM frequencies up to 200 kHz with controlled rise/fall edges and minimal overlap loss. |
| Electrically similar to MJD44H series | Pin-compatible and parametrically aligned with legacy MJD44H family, simplifying drop-in replacement in existing designs. |
Applications
| Power Management | Motor Drive |
|---|---|
|
Use Scenario: High-current DC-DC converter primary-side switch or synchronous rectifier driver in industrial power supplies. IC Role / Device Role / Timing Role: NPN power switch controlling energy transfer through inductive storage elements; driven by gate driver or microcontroller GPIO with base resistor network. Use Value: 80 V rating supports 48 V input rails; 8 A current capacity handles >100 W output stages; low VCE(sat) maintains >92 % efficiency at full load. |
Use Scenario: H-bridge half-bridge leg or unidirectional DC motor controller in automated machinery and HVAC actuators. IC Role / Device Role / Timing Role: Low-side switching element commutating brushed DC motor current; synchronized with complementary PNP (MJD45H11) for bidirectional control. Use Value: 160 MHz fT and 420 ns toff enable clean PWM at 20 kHz, minimizing audible noise and torque ripple in motor windings. |
| Linear Mode Voltage Regulator | Constant Current Drive Backlighting |
|
Use Scenario: Pass transistor in adjustable linear regulator supplying stable 5–24 V to sensitive analog or control circuitry. IC Role / Device Role / Timing Role: Series pass element operating in active region; biased via feedback loop to maintain constant output voltage under varying load. Use Value: High hFE (60) reduces base drive burden; 150 °C max junction temperature allows operation in enclosed enclosures with limited airflow. |
Use Scenario: Constant-current source for LED backlight arrays in industrial HMIs and medical displays. IC Role / Device Role / Timing Role: Current-regulating transistor in emitter-follower configuration with precision sense resistor; modulated via analog dimming or PWM. Use Value: Tight VCE(sat) tolerance ensures stable current across temperature; low leakage (<50 µA at 150 °C) prevents LED drift during thermal soak. |
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 |
|---|---|---|---|
| STMicroelectronics BUW12A | Higher VCEO (100 V), lower IC (6 A), higher Rth(j-mb) (8.3 K/W) | Better for 72 V systems but less suitable for 8 A continuous loads without enhanced cooling | Select when higher voltage margin is required and current demand is ≤6 A with larger PCB copper area. |
| ON Semiconductor MJD127G | Lower VCEO (60 V), same IC (8 A), slower switching (toff ≈ 1.2 µs) | Compatible in 24–48 V motor drives where switching speed <100 kHz is acceptable | Choose for cost-sensitive 48 V systems where thermal budget allows slower switching and reduced EMI filtering. |
Compared with BUW12A and MJD127G, MJD44H11J delivers optimal balance of 80 V rating, 8 A current, 1 V saturation, and 420 ns turn-off - making it preferred for compact, thermally constrained 48 V industrial switchers and motor controllers requiring both efficiency and responsiveness.
Availability
MJD44H11J is available at Aetrix Electronics and suitable for power management, motor drive, and constant-current LED backlighting applications requiring stable component supply, long-term production continuity, and traceable sourcing from authorized channels.
Supply support for MJD44H11J 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.
MJD44H11J belongs to Nexperia's high-power bipolar transistor product line, engineered for ruggedized industrial switching, linear regulation, and load control where thermal efficiency and parametric consistency are critical.
FAQ
What is the maximum continuous collector current for MJD44H11J under standard PCB mounting?
The MJD44H11J supports 8 A continuous collector current when mounted on an FR4 PCB with a 1 cm² tin-plated copper pad for the collector-connected mounting base, as defined in the "Limiting values" table and thermal derating curve (Fig. 1). Exceeding this without enhanced thermal management risks junction temperature exceeding 150 °C.
Can MJD44H11J be used in linear regulator applications?
Yes - its 150 °C maximum junction temperature, 60 hFE at 2 A, and low 1 V VCE(sat) make it suitable as a pass transistor in adjustable linear regulators. Stable operation requires adequate heatsinking via the mounting base and careful thermal design to avoid thermal runaway under high VIN–VOUT differentials.
Is MJD44H11J pin-compatible with other DPAK NPN transistors?
MJD44H11J uses standard DPAK (SOT428C) pinout: Pin 1 = Base, Pin 2 = Collector (connected to mounting base), Pin 3 = Emitter. It is electrically and mechanically compatible with other SOT428C-packaged NPN transistors sharing this pin assignment, such as MJD44H11 (non-J suffix) and BUW12A - though electrical parameters differ.
What is the recommended PCB footprint for reflow soldering of MJD44H11J?
The official Nexperia reflow footprint (Fig. 14) specifies a 6.15 mm × 5.8 mm occupied area, with 4.57 mm × 6.0 mm solder lands, 1.8 mm solder paste stencil opening, and 1.3 mm solder resist clearance. Use of this layout ensures reliable thermal conduction to the mounting base and mechanical integrity during thermal cycling.
MJD44H11J 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):
- 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:
- 160MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MJD44H11J FAQ
1.How can I place an order for MJD44H11J through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD44H11J 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 MJD44H11J reliable?
The price and inventory of MJD44H11J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD44H11J is usually 5 days.
3.What payment methods are accepted for MJD44H11J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD44H11J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD44H11J?
MJD44H11J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD44H11J 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 MJD44H11J?
For technical support, including MJD44H11J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD44H11J requirements.
6.How does Aetrix verify that MJD44H11J is sourced from the original manufacturer or authorized distributors?
All MJD44H11J 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 MJD44H11J meets industry standards.
7.What is the process for return or replacement of MJD44H11J?
All MJD44H11J units undergo pre-shipment inspection (PSI). If there is an issue with MJD44H11J, 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 MJD44H11J part is unused and in its original packaging.
Return procedure for MJD44H11J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MJD44H11J Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
