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Diodes Incorporated FZTA14TA
- Part No.:
- FZTA14TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZTA14TA.pdf
- Description:
- TRANS NPN DARL 30V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,970
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Product details
Overview
FZTA14TA from Diodes Incorporated is a 30V NPN Darlington transistor in SOT223 package, rated for 1A continuous collector current, with minimum DC current gain (hFE) of 10,000 at IC = 10mA and 5,000 at IC = 1A, VCE(sat) ≤ 1.6V at IC = 1A/IB = 1mA, and BVCBO/BVCEO ≥ 30V - used in high-gain switching and linear amplification stages in automotive body control modules and industrial relay drivers.
For engineers reviewing the FZTA14TA datasheet, FZTA14TA pinout, FZTA14TA application, or FZTA14TA equivalent, key selection criteria include verified Darlington gain linearity at 1A, thermal resistance to ambient (RθJA = 41.7°C/W on 50mm × 50mm 2oz copper), ESD HBM rating of 2,000V, and AEC-Q101 qualification readiness per manufacturer statement.
Technical Context
This Darlington pair integrates two NPN transistors in cascade to achieve high current gain while maintaining single-package simplicity. It operates with VEB(on) ≤ 2V at IC = 100mA and supports switching speeds up to fT = 170MHz under pulsed conditions (≤300µs, ≤2% duty cycle).
Thermal performance is defined across four mounting configurations: RθJA ranges from 41.7°C/W (50mm × 50mm 2oz Cu) to 104°C/W (minimum pad layout), and RθJL = 18°C/W confirms efficient heat transfer through the collector lead - critical for sustained 1A operation in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Ensures safe operation in 24V automotive supply rails with margin against transients. |
| IC (continuous) | 1 A - Supports direct drive of medium-power loads like solenoids, fans, or LED arrays without external heatsinking on adequate copper. |
| hFE | 5,000 min @ IC = 1A - Enables low-base-drive-current switching (e.g., 1mA IB controls 1A load), reducing MCU GPIO burden. |
| VCE(sat) | 1.6 V max @ IC = 1A/IB = 1mA - Limits conduction loss to ≤1.6W, enabling thermally viable 1A switching in SOT223. |
| fT | 170 MHz - Supports fast turn-off in PWM-driven applications up to ~100kHz with controlled rise/fall times. |
| ESD HBM | 2,000 V - Provides robustness against handling-induced discharge during assembly and field service. |
| RθJA | 41.7 °C/W - Achievable only with 50mm × 50mm 2oz copper; defines maximum ambient temperature for 1A continuous use (TA ≤ +108°C). |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin configuration with emitter-collector-emitter-collector terminal arrangement; molded green plastic, UL 94V-0 rated, 0.112g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Emitter of input transistor | Primary current return path; electrically tied to Pin 3 in standard Darlington configuration. |
| Pin 2 (Base) | Base of input transistor | Control node requiring minimal drive current (e.g., 1mA for 1A output); sensitive to ESD. |
| Pin 3 (Emitter) | Emitter of output transistor / common emitter | Internally connected to Pin 1; forms low-impedance emitter output node for load connection. |
| Pin 4 (Collector) | Collector of output transistor | Main power output terminal; thermally coupled to PCB via large copper area; carries full load current. |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE ≥ 5,000 at 1A enables microcontroller-level base drive without buffer stages. |
| Low saturation voltage | VCE(sat) ≤ 1.6V at 1A minimizes power dissipation and self-heating in high-duty-cycle switching. |
| Robust voltage ratings | BVCEO/BVCBO ≥ 30V supports 24V systems with ISO 7637-2 pulse margin and transient immunity. |
| Automotive-ready construction | Lead-free, halogen-free, RoHS-compliant, and qualified per AEC-Q101 requirements upon request. |
| Thermally optimized package | SOT223 collector tab provides direct thermal path to PCB; RθJL = 18°C/W enables stable 1A operation. |
Applications
| Automotive Body Control Unit | Industrial Relay Driver |
|---|---|
|
Use Scenario: Driving 12V/24V electromagnetic relays in door lock actuators and lighting control modules. IC Role / Device Role / Timing Role: High-gain switch providing isolated low-side load control with minimal MCU GPIO current draw. Use Value: Eliminates need for discrete driver transistors or dedicated relay driver ICs, reducing BOM count and board space. |
Use Scenario: Controlling 24V DC contactor coils in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: Medium-power interface device translating logic-level signals into coil-actuating current. Use Value: Delivers 1A peak coil current with <1.6V drop, ensuring reliable relay pull-in while limiting thermal stress on PCB. |
| DC Motor Speed Control | LED Array Dimming Circuit |
|
Use Scenario: PWM-based speed regulation of small brushed DC motors in HVAC blower assemblies. IC Role / Device Role / Timing Role: Low-side switching element handling 1A motor stall current with fast turn-off (fT = 170MHz). Use Value: Maintains motor torque at low duty cycles due to high hFE, avoiding gate-drive complexity of MOSFET solutions. |
Use Scenario: Constant-current dimming of multi-segment automotive LED clusters (e.g., tail lamps, DRLs). IC Role / Device Role / Timing Role: Linear or PWM-controlled current sink regulating LED string current up to 1A. Use Value: Stable current regulation with low VCE(sat) ensures consistent brightness and minimal thermal derating across temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD122G | Higher VCEO = 100V, lower hFE = 1,000–4,000 @ 1A, TO-252 package | Better for 48V industrial systems; larger footprint and higher thermal mass | Select when higher voltage margin or higher thermal inertia is required over SOT223 size constraints. |
| ZTX1048A | Lower VCEO = 20V, hFE = 400–1,200 @ 1A, SOT89 package | Limited to 12V systems; reduced gain requires higher base drive current | Choose only for cost-sensitive 12V designs where 1A capability suffices and gain >5k is not needed. |
Compared with MJD122G and ZTX1048A, FZTA14TA uniquely balances 30V rating, 5k+ gain at 1A, and SOT223 thermal efficiency - making it optimal for space-constrained 24V automotive and industrial switching where base-drive simplicity and thermal manageability are prioritized.
Availability
FZTA14TA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and DC motor control systems requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for FZTA14TA 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.
FZTA14TA belongs to Diodes' high-reliability bipolar transistor product line, engineered specifically for automotive and industrial switching applications demanding high gain, low saturation voltage, and robust thermal performance in compact packages.
FAQ
Is FZTA14TA AEC-Q101 qualified?
FZTA14TA is manufactured in IATF 16949-certified facilities and supports PPAP documentation; full AEC-Q101 qualification is available upon request and subject to specific change control agreements - not automatically included in standard commercial-grade shipments.
What is the recommended PCB pad layout for thermal performance?
For RθJA = 41.7°C/W, use a 50mm × 50mm 2oz copper pour connected directly to Pin 4 (collector); the datasheet specifies minimum pad dimensions C1 = 6.40mm, Y2 = 8.00mm, and recommends solder mask defined pads to maximize thermal conduction.
Can FZTA14TA be used in linear amplifier mode?
Yes - its hFE stability across 10mA–1A and VCE(sat) characterization support Class-A or AB linear operation, but power dissipation must remain within 1.2W (derated above +70°C ambient) using appropriate copper area per thermal curves in DS33192 Rev. 4-2.
Does FZTA14TA have integrated base-emitter resistor?
No - FZTA14TA is a bare Darlington transistor without internal biasing resistors; external base resistor selection is required to set operating point, typically calculated using VBE(sat) ≈ 2.2V and desired IB = IC/hFE (e.g., 1mA for 1A output).
FZTA14TA 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 - Darlington
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.6V @ 1mA, 1A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20000 @ 100mA, 5V
- Power - Max:
- 2 W
- Frequency - Transition:
- 170MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZTA14TA FAQ
1.How can I place an order for FZTA14TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZTA14TA 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 FZTA14TA reliable?
The price and inventory of FZTA14TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZTA14TA is usually 5 days.
3.What payment methods are accepted for FZTA14TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZTA14TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZTA14TA?
FZTA14TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZTA14TA 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 FZTA14TA?
For technical support, including FZTA14TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZTA14TA requirements.
6.How does Aetrix verify that FZTA14TA is sourced from the original manufacturer or authorized distributors?
All FZTA14TA 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 FZTA14TA meets industry standards.
7.What is the process for return or replacement of FZTA14TA?
All FZTA14TA units undergo pre-shipment inspection (PSI). If there is an issue with FZTA14TA, 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 FZTA14TA part is unused and in its original packaging.
Return procedure for FZTA14TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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