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Diodes Incorporated ZXTN25020DFLTA
- Part No.:
- ZXTN25020DFLTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTN25020DFLTA.pdf
- Description:
- TRANS NPN 20V 2A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,808
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Product details
Overview
ZXTN25020DFLTA from Diodes Incorporated is a 20V NPN low-saturation transistor in SOT23 package, designed for high-current switching with VCE(sat) < 70 mV at 1 A, hFE = 300–900 (IC = 10 mA), and IC = 2 A continuous. It serves as a power switch in DC-DC converters, motor controls, and MOSFET gate drivers where low conduction loss and fast turn-on are critical.
For engineers reviewing the ZXTN25020DFLTA datasheet, ZXTN25020DFLTA pinout, ZXTN25020DFLTA application, or ZXTN25020DFLTA equivalent, key selection criteria include verified VCE(sat) @ high IC/IB ratios, thermal derating on FR4, safe operating area limits, and automotive-grade qualification status.
Technical Context
This epitaxial planar NPN transistor operates with VCEO = 20 V and supports peak collector current up to 8 A in pulsed mode. Its low VCE(sat) of 60–70 mV at IC = 1 A / IB = 100 mA enables high-efficiency switching in compact power stages.
Thermal performance is defined for 25 mm × 25 mm FR4 PCB with 1 oz copper: RθJA = 357 °C/W and linear derating factor 2.8 mW/°C above +25°C. The device exhibits fT = 215 MHz and Cobo = 16.5–25 pF, supporting moderate-frequency switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 20 V - Maximum allowable collector-emitter voltage under DC blocking conditions; defines upper rail limit in low-voltage switch designs. |
| IC (continuous) | 2 A - Continuous collector current rating at TA = +25°C; determines steady-state load-handling capability in power switches. |
| VCE(sat) | 60–70 mV @ IC = 1 A, IB = 100 mA - Confirmed low conduction loss enabling <0.07 W dissipation per switch at rated current. |
| hFE | 300–900 @ IC = 10 mA, VCE = 2 V - High DC gain ensures robust base drive margin and stable saturation across temperature. |
| fT | 215 MHz - Transition frequency confirms suitability for switching frequencies up to ~10–20 MHz with adequate gain margin. |
| RθJA | 357 °C/W - Junction-to-ambient thermal resistance on standard 25 mm × 25 mm FR4 board; used to calculate max ambient temperature for 150°C junction limit. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3 terminals, 0.008 g mass, UL 94V-0 rated molding compound, and matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current return path; connected to ground or low-side reference in common-emitter configurations. |
| 2 (Base) | B | Control input; requires ~100 mA drive for full saturation at 1 A collector current. |
| 3 (Collector) | C | High-current output node; connects to load or switching node in DC-DC, motor, or gate-drive circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | <70 mV @ 1 A enables sub-70 mW conduction loss, reducing thermal stress in space-constrained power stages. |
| High peak current capability | 8 A pulsed rating supports short-duration surge loads in motor startup or inrush limiting applications. |
| Epitaxial planar die construction | Ensures consistent parametric distribution, tight VCE(sat) and hFE tolerances, and reliable high-temperature operation. |
| AEC-Q101 qualification support | Manufactured in IATF 16949 certified facilities; PPAP-capable for automotive power switching applications requiring change control. |
Applications
| DC-DC Converters | Motor Controls |
|---|---|
Use Scenario: Used as synchronous rectifier or main switch in buck/boost converters operating at ≤500 kHz. IC Role / Device Role / Timing Role: NPN power switch controlling energy transfer between inductor and output capacitor. Use Value: Low VCE(sat) reduces conduction loss by >40% vs. standard transistors, improving efficiency at 1–2 A output currents. |
Use Scenario: Drives brushed DC motor windings in automotive HVAC blower or seat adjustment modules. IC Role / Device Role / Timing Role: Low-side switch enabling PWM-controlled bidirectional current flow through motor coils. Use Value: 2 A continuous rating and 8 A pulse handling support stall-tolerant operation without thermal shutdown. |
| DC Fans | MOSFET Gate Drivers |
Use Scenario: Controls 12 V cooling fans in industrial controllers and telecom power supplies. IC Role / Device Role / Timing Role: Constant-current switch regulating fan speed via PWM duty cycle modulation. Use Value: Stable hFE across -55°C to +150°C ensures consistent fan response over full industrial temperature range. |
Use Scenario: Drives N-channel MOSFET gates in half-bridge inverters for servo drives and LED lighting. IC Role / Device Role / Timing Role: High-current buffer amplifying microcontroller GPIO signals to deliver ≥100 mA gate charge pulses. Use Value: Fast switching (tr = 72.2 ns, tf = 63.9 ns) minimizes gate drive delay and improves MOSFET transition efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN low-saturation transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25012DFLTA | VCEO = 12 V, VCE(sat) = 65 mV @ 1 A, IC = 1.5 A - lower voltage and current rating. | Suitable only for ≤12 V systems; not recommended for 20 V DC-DC or motor control rails. | Select when board-level voltage is capped at 12 V and thermal budget allows reduced current headroom. |
| DMT3005LPSQ-7 | 30 V PNP complement in SOT23-3; VECO = 30 V, VEC(sat) = 110 mV @ 1 A - higher saturation voltage, opposite polarity. | Used in high-side switching or complementary pair configurations; not a direct replacement. | Choose only for PNP-based topologies or dual-NPN/PNP driver stages requiring matched thermal behavior. |
Compared with ZXTN25012DFLTA and DMT3005LPSQ-7, ZXTN25020DFLTA uniquely delivers 20 V VCEO, 2 A continuous current, and sub-70 mV saturation in a single SOT23 footprint-enabling higher-voltage, higher-power switching without package or layout changes.
Availability
ZXTN25020DFLTA is available at Aetrix Electronics and suitable for DC-DC converters, motor controls, and MOSFET gate drivers requiring stable component supply, automotive-qualified sourcing, and RoHS-compliant manufacturing.
Supply support for ZXTN25020DFLTA 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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
ZXTN25020DFLTA belongs to Diodes' ZXT series of low-saturation bipolar transistors, engineered specifically for high-efficiency, high-current switching in space-constrained power conversion and motor drive applications.
FAQ
What is the maximum allowable junction temperature for ZXTN25020DFLTA?
The absolute maximum junction temperature is +150°C, with storage temperature matching this range. Operation above this limit risks permanent degradation of gain and saturation characteristics. Derating begins at +25°C ambient using the specified 2.8 mW/°C linear factor on a 25 mm × 25 mm FR4 board.
Is ZXTN25020DFLTA qualified for automotive applications?
ZXTN25020DFLTA is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 in standard form, Diodes offers automotive-grade variants upon request with full change control and test reports for qualifying applications.
How does the SOT23 package affect thermal performance in high-current operation?
The SOT23 package has RθJA = 357 °C/W on standard FR4, limiting continuous 2 A operation to ≤+55°C ambient unless board-level copper area or airflow is increased. For sustained 2 A loads, thermal vias and 2-layer copper pours are strongly recommended to reduce effective RθJA.
Can ZXTN25020DFLTA replace a MOSFET in low-voltage switching applications?
No-it is a bipolar transistor requiring continuous base current drive, unlike MOSFETs with gate capacitance-only drive. However, it outperforms many small-signal MOSFETs in VDS(on) at 1–2 A due to its ultra-low VCE(sat), making it preferable where gate drive complexity or cost must be minimized.
ZXTN25020DFLTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 270mV @ 450mA, 4.5A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 10mA, 2V
- Power - Max:
- 350 mW
- Frequency - Transition:
- 215MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTN25020DFLTA FAQ
1.How can I place an order for ZXTN25020DFLTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN25020DFLTA 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 ZXTN25020DFLTA reliable?
The price and inventory of ZXTN25020DFLTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN25020DFLTA is usually 5 days.
3.What payment methods are accepted for ZXTN25020DFLTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN25020DFLTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN25020DFLTA?
ZXTN25020DFLTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN25020DFLTA 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 ZXTN25020DFLTA?
For technical support, including ZXTN25020DFLTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN25020DFLTA requirements.
6.How does Aetrix verify that ZXTN25020DFLTA is sourced from the original manufacturer or authorized distributors?
All ZXTN25020DFLTA 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 ZXTN25020DFLTA meets industry standards.
7.What is the process for return or replacement of ZXTN25020DFLTA?
All ZXTN25020DFLTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN25020DFLTA, 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 ZXTN25020DFLTA part is unused and in its original packaging.
Return procedure for ZXTN25020DFLTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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