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Diodes Incorporated ZXT11N15DFTC
- Part No.:
- ZXT11N15DFTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXT11N15DFTC.pdf
- Description:
- TRANS NPN 15V 3A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,824
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Product details
Overview
ZXT11N15DFTC from Diodes Incorporated is a 15V NPN low-saturation transistor in SOT23 package, designed for high-current switching with VCE(sat) ≤ 55 mV at IC = 1 A / IB = 100 mA, 3 A continuous collector current, and Rsat = 37 mΩ - used in DC-DC converter power switches and motor control stages.
For engineers reviewing the ZXT11N15DFTC datasheet, ZXT11N15DFTC pinout, ZXT11N15DFTC application, or ZXT11N15DFTC equivalent, key selection criteria include saturation voltage under high IC, thermal resistance (RθJA = 155 °C/W at t < 5 s), SOT23 footprint compatibility, and automotive-grade qualification readiness.
Technical Context
This NPN bipolar junction transistor operates as a low-VCE(sat) power switch optimized for efficiency-critical 12V/15V rail applications. Its fT = 145 MHz supports fast switching, while hFE = 150–900 across IC = 10 mA to 5 A enables stable gain control in both linear and saturated modes.
Thermal performance is defined by two derating profiles: 6.4 mW/°C above +25°C for short-duration pulses (t < 5 s), and 5 mW/°C for steady-state operation on 25 mm × 25 mm FR4 with 1 oz copper - reflecting its dual-use capability in transient load switching and continuous conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 15 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration. |
| IC (continuous) | 3 A - Sustained collector current without thermal shutdown on standard PCB layout. |
| VCE(sat) | 55 mV @ IC = 1 A, IB = 100 mA - Enables sub-0.1 W conduction loss in 1 A load paths. |
| Rsat | 37 mΩ - Equivalent on-resistance derived from VCE(sat)/IC, critical for power loss modeling. |
| fT | 145 MHz - Transition frequency confirming suitability for PWM switching up to ~10–20 MHz practical edge rates. |
| RθJA | 155 °C/W (t < 5 s) - Junction-to-ambient thermal resistance enabling 5.2 W pulse power handling before TJ exceeds 150 °C. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitting terminal for majority carriers | Low-impedance return path; connected to ground or low-side reference in switch configurations. |
| 2 (Base) | Control input for minority carrier injection | Requires ≥100 mA drive for full saturation at 3 A; VBE(sat) = 0.9–1.0 V defines driver voltage headroom. |
| 3 (Collector) | Current output terminal | High-current output node; rated for 40 V reverse bias (VCBO) and 5 A peak pulse (ICM). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low saturation voltage | VCE(sat) ≤ 55 mV at 1 A ensures <55 mW conduction loss per switch instance. |
| High continuous current rating | 3 A IC supports compact high-power density designs without external heatsinking on standard PCBs. |
| Fast switching capability | 110 ns turn-on / 220 ns turn-off times enable efficient operation in 100–500 kHz DC-DC topologies. |
| Automotive-ready construction | Manufactured in IATF 16949-certified facilities; PPAP-capable with AEC-Q101 qualification path available. |
Applications
| DC-DC Converter Switch | Power Management Load Switch |
|---|---|
Use Scenario: High-efficiency buck converter output stage operating from 12 V input to 3.3–5 V output at 1–3 A load. IC Role / Device Role / Timing Role: Low-side synchronous rectifier or main switching transistor in non-isolated topology. Use Value: 55 mV VCE(sat) reduces conduction loss by >40% vs. standard 200 mV transistors at 1 A, improving overall efficiency by ~1.2%. | Use Scenario: Controlled 12 V power rail enable/disable for FPGA core voltage or peripheral subsystems. IC Role / Device Role / Timing Role: High-current discrete load switch replacing integrated PMIC outputs where higher ISC tolerance is required. Use Value: 3 A continuous rating and 5 A pulse capability allow safe inrush current handling during hot-plug events without latch-up. |
| Motor Driver Half-Bridge | Automotive Body Control Module |
Use Scenario: Low-side driver in brushed DC motor H-bridge for HVAC actuators or seat positioners (12 V system). IC Role / Device Role / Timing Role: Ground-referenced switching element controlling motor current direction and braking. Use Value: 155 °C/W thermal resistance permits 2.5 W dissipation at ambient 85 °C - sufficient for intermittent 2 A motor stall conditions. | Use Scenario: Window lift, mirror fold, or lighting control in AEC-Q100-compliant body electronics modules. IC Role / Device Role / Timing Role: Discrete power switch for resistive/inductive loads requiring robust ESD immunity and long-term reliability. Use Value: Halogen- and antimony-free "Green" construction meets automotive environmental compliance; JEDEC J-STD-020 Level 1 moisture rating simplifies assembly. |
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 |
|---|---|---|---|
| FMMT617 | VCEO = 12 V, VCE(sat) = 120 mV @ 1 A, IC = 1.5 A - lower voltage rating and higher saturation loss. | Not suitable for 15 V rail systems; limited to ≤12 V DC-DC or logic-level switching. | Select only if legacy design reuse requires identical SOT23 footprint and lower cost is prioritized over performance. |
| ZXTN2010Z | VCEO = 20 V, VCE(sat) = 45 mV @ 1 A, IC = 4 A - higher voltage margin and lower saturation, but larger SOT89 package. | Requires PCB redesign due to SOT89 thermal pad and 3.1 mm × 1.6 mm footprint vs. SOT23's 2.9 mm × 1.3 mm. | Choose when 20 V system margin or 4 A continuous current is required, and board space allows SOT89 mounting. |
Compared with ZXT11N15DFTC, FMMT617 trades voltage headroom and efficiency for cost and footprint continuity, while ZXTN2010Z improves both voltage rating and saturation performance at the expense of package compatibility - making ZXT11N15DFTC optimal for space-constrained 15 V applications demanding minimal conduction loss.
Availability
ZXT11N15DFTC is available at Aetrix Electronics and suitable for DC-DC converters, power-management functions, and motor controls requiring stable component supply despite its obsolete status - supported via last-time-buy inventory and cross-reference engineering assistance.
Supply support for ZXT11N15DFTC 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 ZXT series targets high-performance power switching applications, emphasizing ultra-low saturation voltage, high current density, and automotive-grade reliability in compact surface-mount packages.
FAQ
Is ZXT11N15DFTC still in active production?
No - Diodes Incorporated has marked ZXT11N15DFTC as obsolete (DS33628 Rev. 2–4, May 2024). It is no longer manufactured, but Aetrix Electronics maintains limited legacy stock and supports transition to FMMT617 or ZXTN2010Z with full parametric validation.
What is the maximum safe operating temperature for ZXT11N15DFTC?
The device supports junction temperatures from –55 °C to +150 °C. At ambient 85 °C, its 155 °C/W thermal resistance limits usable power dissipation to approximately 2.5 W for short pulses (t < 5 s), assuming standard PCB layout per Note 6 in the datasheet.
Can ZXT11N15DFTC replace a MOSFET in low-side switching?
Yes - as a low-VCE(sat) bipolar transistor, it delivers comparable conduction loss to small-signal MOSFETs below 3 A, but requires base current drive (≥100 mA) rather than gate voltage. It lacks MOSFET advantages like zero gate current and simpler drive, but offers better SOA under inductive switching.
Does ZXT11N15DFTC meet AEC-Q101 requirements?
It is not pre-qualified to AEC-Q101, but Diodes states that automotive-grade versions are available upon request - manufactured in IATF 16949-certified facilities with PPAP capability. Customers must engage Diodes' automotive team to initiate qualification for specific applications.
ZXT11N15DFTC 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:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 15 V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 150mA, 3A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 200mA, 2V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 145MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXT11N15DFTC FAQ
1.How can I place an order for ZXT11N15DFTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXT11N15DFTC 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 ZXT11N15DFTC reliable?
The price and inventory of ZXT11N15DFTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXT11N15DFTC is usually 5 days.
3.What payment methods are accepted for ZXT11N15DFTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXT11N15DFTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXT11N15DFTC?
ZXT11N15DFTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXT11N15DFTC 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 ZXT11N15DFTC?
For technical support, including ZXT11N15DFTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXT11N15DFTC requirements.
6.How does Aetrix verify that ZXT11N15DFTC is sourced from the original manufacturer or authorized distributors?
All ZXT11N15DFTC 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 ZXT11N15DFTC meets industry standards.
7.What is the process for return or replacement of ZXT11N15DFTC?
All ZXT11N15DFTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXT11N15DFTC, 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 ZXT11N15DFTC part is unused and in its original packaging.
Return procedure for ZXT11N15DFTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXT11N15DFTC Tags
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Diodes Incorporated
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