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Diodes Incorporated DXT13003DG-13
- Part No.:
- DXT13003DG-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
DXT13003DG-13.pdf
- Description:
- TRANS NPN 450V 1.3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,329
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Product details
Overview
DXT13003DG-13 from Diodes Incorporated is a 450V NPN high-voltage power transistor in SOT223 package, designed for switching in low-power AC-DC SMPS. It delivers 1.3A continuous collector current, features 700V collector-emitter breakdown (BVCES), integrated collector-emitter freewheeling diode, and operates across –55°C to +150°C. Used in mobile phone battery chargers and LED lighting power supplies.
For engineers reviewing the DXT13003DG-13 datasheet, DXT13003DG-13 pinout, DXT13003DG-13 application, or DXT13003DG-13 equivalent, key selection criteria include BVCES ≥700V, VCE(sat) ≤0.4V at IC=1A/IB=0.25A, hFE ≥25 at IC=1.0A, thermal resistance RθJA ≤62.5°C/W on 25mm×25mm copper, and SOT223 lead-free RoHS/Green compliance.
Technical Context
This NPN bipolar junction transistor is optimized for high-voltage flyback and forward converter primary-side switching in sub-3W AC-DC adapters. Its 700V BVCES rating enables robust operation under voltage transients, while the integrated collector-emitter diode eliminates need for external freewheeling components in single-ended topologies.
The device uses epitaxial planar die construction with gold-bonded wire interconnects and is characterized for pulsed switching performance: ton = 0.7µs, ts = 3.0µs, tf = 0.35µs at IC = 1A, VCC = 125V, with fT = 4MHz ensuring stable gain in control loop feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BVCES | 700 V - Withstands 700V collector-to-emitter with base open; enables use in 230VAC input designs with margin against surge and ringing. |
| VCE(sat) | 0.4 V @ IC=1A, IB=0.25A - Low saturation voltage minimizes conduction loss and thermal stress in continuous switching mode. |
| hFE | 25 min @ IC=1.0A, VCE=2V - Sufficient DC current gain for direct base drive from PWM controllers without additional amplification stages. |
| RθJA | 62.5 °C/W - Thermal resistance on 25mm×25mm 2oz copper; supports 2W dissipation at 75°C ambient with 150°C max junction temperature. |
| ESD HBM | 8,000 V - Robust human-body-model ESD tolerance simplifies handling and board-level assembly without special precautions. |
| fT | 4 MHz - Transition frequency ensures adequate small-signal bandwidth for closed-loop stability in current-mode controlled converters. |
Pinout & Package
SOT223 package with three terminals: emitter (pin 1), base (pin 2), collector (pin 3), and exposed collector tab (pin 4) serving as thermal and electrical connection point. Molded plastic case meets UL 94V-0 flammability rating and weighs 0.112 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Current return path for collector current | Connected to ground or low-side reference; requires low-inductance layout to minimize switching noise coupling. |
| Pin 2 (Base) | Control terminal for transistor turn-on/off | Driven by PWM controller output; requires series resistor to limit peak base current to ≤1.5A per absolute max rating. |
| Pin 3 (Collector) | Main high-voltage current path input | Connected to transformer primary and high-side rail; must maintain >3mm creepage/clearance per HV safety standards. |
| Pin 4 (Collector Tab) | Thermal and electrical extension of collector | Soldered directly to large copper pour for heat dissipation; electrically identical to pin 3 and must be isolated from other nets. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated collector-emitter diode | Eliminates discrete freewheeling diode in flyback snubberless designs, reducing BOM count and PCB area. |
| Lead-free & Halogen-free "Green" construction | Meets RoHS 2 (2011/65/EU) and JEDEC J-STD-020 Level 1 moisture sensitivity; compatible with standard reflow profiles. |
| High BVEBO (9V) | Enables reliable base drive with ±5V logic-level signals without clamping circuits, supporting direct microcontroller interface. |
| Low VCE(sat) at high current | 0.4V saturation at 1A reduces conduction loss to <0.4W, improving efficiency in 5–12V output SMPS designs. |
Applications
| Battery Charger for Smartphones | LED Lighting Power Supply |
|---|---|
Use Scenario: Compact wall adapter converting 100–240VAC to 5V/2A for USB charging. IC Role / Device Role / Timing Role: Primary-side switch in quasi-resonant flyback topology operating at 65kHz. Use Value: 700V BVCES withstands 380VDC bus plus 150V ringing; integrated diode replaces external 1N4007, saving 3.2mm² PCB area. | Use Scenario: Off-line constant-current driver powering 12–24V LED strings in residential downlights. IC Role / Device Role / Timing Role: Main switching element in primary-side regulated buck-boost converter. Use Value: 1.3A IC rating supports up to 15W output; RθJA = 62.5°C/W enables natural-convection cooling without heatsink. |
| DVD/STB Power Supply | Set-Top Box Standby Converter |
Use Scenario: Dual-output (5V/12V) SMPS for DVD player mainboard and optical drive. IC Role / Device Role / Timing Role: High-side switch in discontinuous conduction mode (DCM) forward converter. Use Value: 450V VCEO rating matches 375VDC bus; hFE ≥25 ensures stable base drive from UC3842-derived gate driver. | Use Scenario: Auxiliary 3.3V/100mA standby supply active during system sleep mode. IC Role / Device Role / Timing Role: Low-duty-cycle switch in burst-mode flyback for ultra-low no-load consumption. Use Value: 8kV ESD HBM prevents latch-up during hot-plug events; 0.112g mass eases mechanical shock reliability in consumer enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage NPN switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD13003G | BVCES = 700V same; VCE(sat) = 0.5V @ IC=1A (higher loss); hFE = 10–40 (wider spread) | Same SOT223 footprint but higher thermal resistance (RθJA = 83°C/W), limiting power handling | Select when cost priority outweighs efficiency; verify thermal margin at full load |
| ST13003 | BVCES = 700V same; no integrated C-E diode; TO-126 package (larger, higher RθJA = 100°C/W) | Requires external freewheeling diode; incompatible pinout and thermal pad layout | Choose only if legacy TO-126 board redesign is acceptable and diode BOM addition is tolerable |
Compared with MJD13003G and ST13003, DXT13003DG-13 offers lower VCE(sat), integrated diode, and superior thermal performance in SOT223-enabling smaller, cooler-running 5–15W AC-DC supplies without layout or BOM changes.
Availability
DXT13003DG-13 is available at Aetrix Electronics and suitable for smartphone battery chargers, LED lighting drivers, DVD/STB power supplies, and set-top box standby converters requiring stable component supply and long-term industrial availability.
Supply support for DXT13003DG-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 and manufacturing operations across Asia and the Americas.
This device belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for cost-sensitive, space-constrained AC-DC offline power conversion in consumer and lighting applications.
FAQ
What is the maximum safe operating voltage for DXT13003DG-13 in continuous conduction mode?
The absolute maximum collector-emitter voltage is 450V (BVCEO) with base open. In practical flyback designs, it is rated for 375VDC bus operation with 20% margin for ringing and surges. Exceeding 400VDC without snubbing risks avalanche-induced degradation over time.
Does DXT13003DG-13 require an external freewheeling diode?
No. The device integrates a monolithic collector-emitter diode optimized for flyback energy recovery. This eliminates the need for an external 1N4007 or similar diode in quasi-resonant and DCM flyback topologies, reducing component count and layout complexity.
Can DXT13003DG-13 be used with 3.3V microcontroller GPIO for base drive?
Yes, but only with current-limiting. At VBE(sat) ≈1.2V and required IB = 0.25A for IC = 1A, a 3.3V GPIO must drive through a 8.4Ω series resistor to stay within 1.5A peak base current limit. A dedicated base driver IC is recommended for reliable switching.
How does the SOT223 thermal pad affect PCB layout requirements?
The exposed collector tab (pin 4) must be soldered to ≥25mm² of 2oz copper with ≥4 thermal vias (0.3mm diameter) to achieve the 62.5°C/W RθJA rating. Isolation from adjacent nets must maintain ≥3mm clearance per IEC 62368-1 for 230VAC input applications.
DXT13003DG-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1.3 A
- Voltage - Collector Emitter Breakdown (Max):
- 450 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 250mA, 1A
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 16 @ 500mA, 2V
- Power - Max:
- 700 mW
- Frequency - Transition:
- 4MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
DXT13003DG-13 FAQ
1.How can I place an order for DXT13003DG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DXT13003DG-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 DXT13003DG-13 reliable?
The price and inventory of DXT13003DG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DXT13003DG-13 is usually 5 days.
3.What payment methods are accepted for DXT13003DG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DXT13003DG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DXT13003DG-13?
DXT13003DG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DXT13003DG-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 DXT13003DG-13?
For technical support, including DXT13003DG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DXT13003DG-13 requirements.
6.How does Aetrix verify that DXT13003DG-13 is sourced from the original manufacturer or authorized distributors?
All DXT13003DG-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 DXT13003DG-13 meets industry standards.
7.What is the process for return or replacement of DXT13003DG-13?
All DXT13003DG-13 units undergo pre-shipment inspection (PSI). If there is an issue with DXT13003DG-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 DXT13003DG-13 part is unused and in its original packaging.
Return procedure for DXT13003DG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DXT13003DG-13 Tags
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Diodes Incorporated
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