My Inquiry
My Account
Diodes Incorporated MJD31CUQ-13
- Part No.:
- MJD31CUQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MJD31CUQ-13.pdf
- Description:
- TRANS NPN 100V 3A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:1,870
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MJD31CUQ-13 from Diodes Incorporated is a 100V NPN medium-power transistor in TO252 (DPAK) package, rated for 3A continuous collector current and 5A peak pulse current, with VCEO = 100V, VCBO = 120V, and VEBO = 7V; it serves as a robust switching or linear amplification device in automotive power supplies and industrial motor drivers.
For engineers reviewing the MJD31CUQ-13 datasheet, MJD31CUQ-13 pinout, MJD31CUQ-13 application, or MJD31CUQ-13 equivalent, key selection criteria include its AEC-Q101 qualification, 16W maximum power dissipation (with thermal pad), low VCE(sat) of 300 mV at IC = 1A/IB = 100mA, and complementary pairing with MJD32CUQ for push-pull topologies.
Technical Context
This NPN bipolar junction transistor operates in active, saturation, and cutoff regions with DC current gain (hFE) ranging from 25 to 50 at IC = 1A and 10 to 50 at IC = 3A, supporting both switching and analog amplification functions under −55°C to +150°C operating temperature range.
Its safe operating area (SOA) is defined up to 100V VCE and 3A IC in DC mode, with transient thermal impedance curves confirming stable operation under pulsed loads up to 100ms; ESD ratings meet JEDEC HBM Class 3A (4,000V) and MM (400V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines upper rail limit in switching applications. |
| IC (continuous) | 3 A - Sustained collector current capability with proper heatsinking; enables use in 24V/48V DC-DC converters and relay drivers. |
| VCE(sat) | 300 mV @ IC=1A/IB=100mA - Low saturation voltage minimizes conduction loss and self-heating in high-duty-cycle switches. |
| hFE | 25–50 @ VCE=4V - Moderate DC gain supports direct base drive without complex bias networks in discrete amplifier stages. |
| RθJC | 7.3 °C/W - Junction-to-case thermal resistance enables efficient heat transfer to PCB copper pads or external heatsinks via exposed collector tab. |
| AEC-Q101 | Qualified - Meets automotive reliability stress test requirements for temperature cycling, HTOL, and ESD; suitable for under-hood modules. |
Pinout & Package
Package: TO252 (DPAK), surface-mount, with exposed collector pad for thermal and electrical connection. Molded plastic body meets UL 94V-0 flammability rating and RoHS/"Green" compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main current sink terminal | Connected to exposed metal tab; must be soldered to ≥25 mm² copper pour for thermal management and current handling. |
| Base (B) | Control input | Receives forward-biased current to turn on transistor; requires series resistor to limit IB ≤ 1A per absolute max rating. |
| Emitter (E) | Current source reference | Common return path; tied to ground or low-side switch node; establishes VBE(on) threshold (~0.95V min) for turn-on. |
Key Features
| Feature | Design Value |
|---|---|
| High BVCEO | 100 V rating supports operation in 48V industrial bus and 36V automotive systems with margin against transients. |
| Peak pulse current | 5 A capability allows short-duration surge handling in motor startup or inductive load switching. |
| Thermal performance | RθJC = 7.3 °C/W enables >2W dissipation on minimal PCB copper, reducing need for external heatsinks. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including PPAP documentation and IATF16949 manufacturing control. |
Applications
| Automotive Power Supply | Industrial Motor Driver |
|---|---|
Use Scenario: Regulating 12V/24V battery-fed auxiliary rails in engine control units and body controllers. IC Role / Device Role / Timing Role: NPN switch controlling PMOS gate or driving buck converter feedback loop. Use Value: 100V VCEO withstands load-dump transients up to 120V; low VCE(sat) reduces dropout and improves efficiency. | Use Scenario: Driving small DC brush motors or solenoids in factory automation equipment. IC Role / Device Role / Timing Role: High-current discrete switch interfacing microcontroller GPIO to inductive load. Use Value: 3A continuous rating handles 2A nominal motor stall current; AEC-Q101 ensures long-term field reliability. |
| LED Lighting Ballast | AC-DC Auxiliary Supply |
Use Scenario: Constant-current regulation in high-bay LED drivers with wide-input voltage ranges. IC Role / Device Role / Timing Role: Linear pass transistor in adjustable current-sink configuration. Use Value: Stable hFE across temperature enables predictable current setting; RθJC supports compact thermal design. | Use Scenario: Standby power supply in industrial SMPS, powering control logic during main converter shutdown. IC Role / Device Role / Timing Role: Primary-side switch in flyback or forward converter auxiliary winding rectifier stage. Use Value: 120V VCBO provides margin against reflected spikes; TO252 thermal pad simplifies thermal layout on multi-layer boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD31C | No "Q" suffix; non-AEC-Q101 qualified, same electrical specs and TO252 package. | Lacks automotive qualification and PPAP support; unsuitable for safety-critical vehicle systems. | Select when cost sensitivity outweighs automotive compliance requirements. |
| STN3PF10 | P-channel MOSFET (100V, 3.5A), different technology; gate-driven vs. current-driven; lower RDS(on) but higher gate charge. | Enables zero-gate-current hold state but requires level-shifting for high-side use; not directly interchangeable. | Choose for lower conduction loss in low-frequency switching where gate drive complexity is acceptable. |
Compared with MJD31C, the MJD31CUQ-13 adds automotive qualification and traceable sourcing; versus STN3PF10, it offers simpler base drive and better SOA for linear operation, though with higher conduction loss than MOSFET alternatives.
Availability
MJD31CUQ-13 is available at Aetrix Electronics and suitable for automotive power supplies, industrial motor drivers, LED lighting ballasts, and AC-DC auxiliary supplies requiring stable component supply and long-term lifecycle support.
Supply support for MJD31CUQ-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MJD31CUQ belongs to Diodes' high-voltage bipolar transistor product line, engineered for ruggedized power switching and amplification in automotive, industrial, and consumer applications demanding reliability and thermal efficiency.
FAQ
What is the maximum allowable base current for continuous operation?
The absolute maximum continuous base current is 1 A, per the datasheet's Absolute Maximum Ratings table. For reliable long-term operation, base current should be limited to ≤375 mA when driving 3 A collector current (IC/IB = 8), ensuring sufficient hFE margin and avoiding thermal runaway at elevated temperatures.
Can MJD31CUQ-13 be used in linear amplifier configurations?
Yes - its DC current gain (hFE = 25–50), low VCE(sat), and 16 W power dissipation rating (with adequate heatsinking) support Class-A and Class-AB audio or signal amplification. Thermal derating must be applied above 25°C ambient, and safe operating area limits must be observed to prevent secondary breakdown.
Is the exposed collector pad electrically isolated from other terminals?
No - the exposed collector pad is internally connected to the collector terminal (Pin C). It must be electrically tied to the collector net on the PCB and thermally bonded to a copper pour. Isolation requires insulating hardware or dielectric thermal interface material if mounting to a common heatsink shared with other devices.
How does the MJD31CUQ-13 differ from the MJD32CUQ?
MJD31CUQ-13 is an NPN transistor; MJD32CUQ is its complementary PNP counterpart, sharing identical voltage/current ratings (100V VCEO, 3A IC) and TO252 package. They are designed for paired use in push-pull, H-bridge, or complementary Darlington configurations where matched thermal and electrical characteristics are critical.
MJD31CUQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 375mA, 3A
- Current - Collector Cutoff (Max):
- 1µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 25 @ 1A, 4V
- Power - Max:
- 1.6 W
- Frequency - Transition:
- 3MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
MJD31CUQ-13 FAQ
1.How can I place an order for MJD31CUQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD31CUQ-13 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 MJD31CUQ-13 reliable?
The price and inventory of MJD31CUQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD31CUQ-13 is usually 5 days.
3.What payment methods are accepted for MJD31CUQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD31CUQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD31CUQ-13?
MJD31CUQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD31CUQ-13 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 MJD31CUQ-13?
For technical support, including MJD31CUQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD31CUQ-13 requirements.
6.How does Aetrix verify that MJD31CUQ-13 is sourced from the original manufacturer or authorized distributors?
All MJD31CUQ-13 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 MJD31CUQ-13 meets industry standards.
7.What is the process for return or replacement of MJD31CUQ-13?
All MJD31CUQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with MJD31CUQ-13, 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 MJD31CUQ-13 part is unused and in its original packaging.
Return procedure for MJD31CUQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MJD31CUQ-13 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
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
