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Diodes Incorporated DXT3906-13
- Part No.:
- DXT3906-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
DXT3906-13.pdf
- Description:
- TRANS PNP 40V 0.2A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,942
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Product details
Overview
DXT3906-13 from Diodes Incorporated is a PNP epitaxial planar silicon transistor in SOT89-3L package, rated for -40 V VCEO, -200 mA IC, and 1 W power dissipation at TA = 25°C; it delivers hFE = 60–300 across IC = -100 μA to -100 mA and supports medium-power switching in DC-DC converters and linear regulators.
For engineers reviewing the DXT3906-13 datasheet, DXT3906-13 pinout, DXT3906-13 application, or DXT3906-13 equivalent, key selection criteria include its -40 V breakdown ratings, low VCE(SAT) (-0.25 V @ -10 mA/-1 mA), thermal resistance (125 °C/W), and RoHS-compliant lead-free plating on copper leadframe.
Technical Context
This PNP bipolar junction transistor operates with base-emitter forward bias controlling collector current flow; its epitaxial planar die construction ensures stable gain and low leakage (ICBO ≤ -50 nA) across -55°C to +150°C ambient range.
Designed for surface-mount automated assembly, it features a three-terminal SOT89-3L outline with collector tab (Pin 1), emitter (Pin 2), and base (Pin 3); thermal performance relies on PCB copper area per AP02001 pad layout, enabling 1 W dissipation only when mounted on FR-4 with specified copper land pattern.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40 V - Maximum safe collector-emitter voltage before avalanche conduction |
| IC (cont.) | -200 mA - Continuous collector current limit defining medium-power switching capability |
| PD | 1 W - Power dissipation capacity at 25°C ambient with specified PCB thermal pad layout |
| hFE | 60–300 - DC current gain range supporting stable biasing from microamp to 100 mA loads |
| VCE(SAT) | -0.25 V @ -10 mA/-1 mA - Low saturation voltage enabling efficient switching with minimal conduction loss |
| fT | 250 MHz - Gain-bandwidth product confirming suitability for audio-frequency amplification and fast switching |
| RθJA | 125 °C/W - Junction-to-ambient thermal resistance requiring defined copper pour for thermal management |
Pinout & Package
Package: SOT89-3L - Molded plastic case with exposed collector tab (Pin 1), emitter (Pin 2), and base (Pin 3); UL 94V-0 rated, moisture sensitivity level 1, weight ≈ 0.072 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | Collector | Electrically connected to metal tab; must be thermally and electrically tied to PCB ground or heatsink plane |
| 2 | Emitter | Current sink terminal; polarity defines PNP operation - current flows into collector, out emitter |
| 3 | Base | Control input; negative base current relative to emitter turns device ON (IB < 0) |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial planar die construction | Ensures consistent hFE and low leakage across temperature and production lots |
| SOT89-3L surface-mount package | Enables high-density PCB layouts and compatibility with reflow soldering in automated assembly lines |
| Lead-free / RoHS-compliant plating | Matte tin annealed over copper leadframe meets global environmental compliance without sacrificing solderability |
| Low VBE(SAT) | -0.65 V min @ -10 mA/-1 mA enables precise base drive design with minimal voltage overhead |
| High fT and low Cobo | 250 MHz fT and 4.5 pF output capacitance support stable operation up to audio frequencies |
Applications
| DC-DC Converter Switch | Linear Voltage Regulator Pass Element |
|---|---|
Use Scenario: Used as the main switching transistor in non-synchronous buck converter topologies operating at ≤500 kHz. IC Role / Device Role / Timing Role: PNP switch controlled by PWM signal applied to base; collector connects to input rail, emitter feeds inductor. Use Value: -0.25 V VCE(SAT) minimizes conduction loss at 100 mA load, improving efficiency over alternatives with higher saturation voltage. | Use Scenario: Serves as the series pass element in adjustable positive-output linear regulators (e.g., with LM317 feedback network). IC Role / Device Role / Timing Role: Acts as current-amplifying pass transistor; base driven by error amplifier to regulate output voltage. Use Value: hFE ≥ 60 at -100 mA ensures stable closed-loop regulation without excessive base drive current. |
| LED Driver (Constant Current) | Signal-Level Inverter Stage |
Use Scenario: Configured in emitter-follower mode to deliver constant current to high-brightness LED strings in automotive interior lighting. IC Role / Device Role / Timing Role: Current source controlled via base voltage; emitter resistor sets LED current, collector tied to supply. Use Value: -40 V VCEO rating accommodates 24 V automotive systems with transient margin, while low VCE(SAT) reduces heat generation. | Use Scenario: Implements logic-level inversion in industrial control interface circuits where TTL/CMOS-compatible swing is required. IC Role / Device Role / Timing Role: Base driven by microcontroller GPIO; collector pulls load to VCC when OFF, emitter sinks current when ON. Use Value: 250 MHz fT and 35 ns rise/fall times support clean digital transitions up to ~10 MHz clock rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25012E6TA | SOT23 package, lower IC (-500 mA), higher VCEO (-60 V), but RθJA = 275 °C/W | Less suitable for 1 W thermal loads without forced cooling; better for space-constrained logic-level switching | Select if board area is critical and power dissipation ≤ 0.3 W; avoid for >300 mA continuous use |
| MMDT3906-7-F | SOT363 dual-package variant; identical electrical specs but shared thermal path between two transistors | Not recommended for single high-current switching; useful only when dual complementary (PNP+NPN) functions needed | Choose only when footprint reuse or dual-device integration justifies reduced per-transistor thermal margin |
Compared with ZXTN25012E6TA and MMDT3906-7-F, DXT3906-13 uniquely balances 1 W power handling, SOT89 thermal robustness, and -40 V rating-making it optimal for standalone medium-power PNP switching where thermal reliability outweighs miniaturization.
Availability
DXT3906-13 is available at Aetrix Electronics and suitable for DC-DC converters, linear voltage regulators, LED drivers, and industrial signal inverters requiring stable component supply and RoHS-compliant manufacturing.
Supply support for DXT3906-13 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.
The DXT3906 belongs to Diodes' general-purpose bipolar transistor product line, engineered specifically for cost-sensitive, medium-power switching and amplification in industrial, consumer, and automotive subsystems.
FAQ
What is the maximum allowable junction temperature for DXT3906-13?
The absolute maximum junction temperature is +150°C, as specified in the Thermal Characteristics table. Operation above this limit risks permanent degradation. Derating begins at TA = 25°C per Fig. 1: power dissipation must be linearly reduced by 8 mW/°C above 25°C ambient when using the AP02001-recommended pad layout.
Can DXT3906-13 replace DXT3904 in a circuit?
No - DXT3906-13 is a PNP transistor, while DXT3904 is its NPN complement. Swapping them without inverting biasing and signal polarity will prevent proper operation. They are intended for complementary pair designs (e.g., push-pull stages), not direct substitution.
Is the collector tab electrically isolated in SOT89-3L?
No - Pin 1 (the metal tab) is internally connected to the collector. It must be electrically tied to the collector net on the PCB and may serve as a thermal path to ground or heatsink; isolation requires insulating hardware or non-conductive mounting methods.
What is the meaning of "Green" Device in the datasheet notes?
"Green" refers to Diodes Incorporated's internal environmental policy: the device uses halogen-free molding compound and lead-free matte tin plating, meeting JEDEC JS709B and IPC-4101D requirements for bromine/chlorine content (<900 ppm) and fully complying with RoHS Directive 2011/65/EU.
DXT3906-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 200 mA
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 1 W
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
DXT3906-13 FAQ
1.How can I place an order for DXT3906-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DXT3906-13 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 DXT3906-13 reliable?
The price and inventory of DXT3906-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DXT3906-13 is usually 5 days.
3.What payment methods are accepted for DXT3906-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DXT3906-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DXT3906-13?
DXT3906-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DXT3906-13 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 DXT3906-13?
For technical support, including DXT3906-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DXT3906-13 requirements.
6.How does Aetrix verify that DXT3906-13 is sourced from the original manufacturer or authorized distributors?
All DXT3906-13 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 DXT3906-13 meets industry standards.
7.What is the process for return or replacement of DXT3906-13?
All DXT3906-13 units undergo pre-shipment inspection (PSI). If there is an issue with DXT3906-13, 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 DXT3906-13 part is unused and in its original packaging.
Return procedure for DXT3906-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DXT3906-13 Tags
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Diodes Incorporated
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Diodes Incorporated
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