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Diodes Incorporated FZT493ATA
- Part No.:
- FZT493ATA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT493ATA.pdf
- Description:
- TRANS NPN 60V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:620
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Product details
Overview
FZT493ATA from Diodes Incorporated is a 60V NPN medium-power high-gain transistor in SOT223 package, rated for 1A continuous collector current, 2A peak pulse current, and DC current gain ≥500 at IC = 150mA. It serves as a switching or linear amplification device in power management stages of industrial motor drivers, LED lighting ballasts, and DC-DC converter output stages.
For engineers reviewing the FZT493ATA datasheet, FZT493ATA pinout, FZT493ATA application, or FZT493ATA equivalent, key selection criteria include VCEO = 60V, hFE ≥ 500 @ IC = 150mA, RθJL = 39°C/W, VCE(sat) ≤ 500mV @ IC = 1A/IB = 100mA, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This NPN bipolar junction transistor operates with a minimum BVCEO of 60V and supports stable switching up to fT = 150MHz under IC = 50mA/VCE = 10V conditions. Its low VCE(sat) (≤500mV) and high hFE enable efficient current amplification with minimal base drive overhead.
The device features a thermally optimized SOT223 package with RθJL = 39°C/W and RθJA = 41.7°C/W on 50mm × 50mm 2oz copper, supporting sustained 1A operation in compact industrial PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60V - Withstands 60V collector-emitter voltage before breakdown; suitable for 48V system rail switching. |
| IC (continuous) | 1A - Supports steady-state load currents up to 1A without derating on standard PCBs. |
| hFE | 500 min @ IC = 150mA - Enables low-base-current drive for efficient gate/base control in discrete driver circuits. |
| VCE(sat) | 500mV max @ IC = 1A, IB = 100mA - Limits conduction loss to ≤0.5W at full load, reducing thermal stress. |
| fT | 150MHz - Supports high-speed switching in PWM frequencies up to ~10MHz with adequate gain margin. |
| RθJL | 39°C/W - Junction-to-lead thermal resistance allows direct heat transfer to PCB copper pour via collector tab. |
Pinout & Package
SOT223 package with exposed collector tab for thermal and electrical connection; molded green compound, UL 94V-0 rated, 0.112g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; requires low-impedance trace for stable biasing. |
| Base (B) | Control input | Receives current-limited drive signal; typical IB = 100mA for 1A IC ensures saturation. |
| Collector (C) | High-current output | Mounted to large copper area via exposed tab; primary heat dissipation path and power output node. |
| Tab / Collector Pad | Thermal & electrical extension of collector | Must be soldered to ≥25mm² 2oz copper for rated 3W PD; electrically tied to collector internally. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control modules and body electronics. |
| High hFE ≥ 500 | Reduces required base drive current by >2× versus standard gain transistors, easing MCU GPIO or logic-level driver design. |
| Low VCE(sat) ≤ 500mV | Minimizes conduction loss in linear and saturated switching modes, improving efficiency in 12–48V power stages. |
| SOT223 thermal performance | RθJL = 39°C/W enables 1A operation with <40°C junction rise on minimal copper, reducing heatsink need. |
Applications
| Industrial Motor Control | LED Constant-Current Driver |
|---|---|
Use Scenario: Driving gate of N-channel MOSFET in half-bridge motor driver stage for 24V BLDC fans. IC Role / Device Role: High-gain NPN switch providing robust 1A base current to fast-turn-on power MOSFETs. Use Value: Ensures MOSFETs remain fully saturated during PWM transitions, minimizing shoot-through risk and conduction loss. | Use Scenario: Regulating current through high-brightness LED strings in outdoor signage. IC Role / Device Role: Linear pass element in adjustable constant-current sink configuration. Use Value: Delivers stable 1A output with <1% current drift over -40°C to +125°C ambient due to high hFE stability. |
| DC-DC Converter Output Stage | Automotive Body Control Module |
Use Scenario: Synchronous rectifier driver in 48V-to-12V buck converter for telecom power supplies. IC Role / Device Role: Low-loss switch controlling gate of SR MOSFET with precise timing and low VCE(sat). Use Value: Achieves <500mV saturation drop at 1A, reducing driver-stage power loss by 30% vs. standard transistors. | Use Scenario: Load switching for solenoid valves and window lift motors in passenger vehicles. IC Role / Device Role: AEC-Q101-qualified discrete switch interfacing microcontroller GPIO to inductive loads. Use Value: Guarantees reliable turn-on/turn-off across temperature and battery voltage range (9–16V), with ESD HBM = 4kV protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25050DFHTA | Higher VCEO = 100V, lower hFE = 200 min @ IC = 1A, SOT223-3L package. | Better suited for 72V industrial systems but requires higher base drive current. | Select when higher breakdown voltage is critical and gain requirements are relaxed. |
| MJD44H11RLG | TO-220 package, VCEO = 80V, hFE = 750 min @ IC = 150mA, PD = 1.5W (free-air). | Requires heatsink for 1A operation; not surface-mount compatible with SOT223 footprints. | Choose only when board space permits TO-220 and thermal mass supports higher junction temperatures. |
Compared with ZXTN25050DFHTA and MJD44H11RLG, FZT493ATA uniquely balances 60V rating, 500+ hFE, SOT223 mountability, and AEC-Q101 compliance-making it optimal for space-constrained, high-reliability 48V industrial and automotive switching where base drive efficiency and thermal integration matter.
Availability
FZT493ATA is available at Aetrix Electronics and suitable for industrial motor control, LED constant-current drivers, DC-DC converter output stages, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for FZT493ATA 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.
FZT493ATA belongs to Diodes' high-reliability discrete transistor product line, engineered for demanding industrial and automotive applications requiring AEC-Q101 qualification, high gain, and robust thermal performance in compact SMT packages.
FAQ
What is the maximum safe operating temperature for FZT493ATA?
The FZT493ATA has an operating junction temperature range of –55°C to +150°C. Under continuous 1A operation with RθJA = 41.7°C/W on 50mm × 50mm 2oz copper, junction temperature remains below 125°C at 70°C ambient-well within safe limits. Derating is required above 70°C ambient per the datasheet's thermal curves.
Is FZT493ATA pin-compatible with other SOT223 NPN transistors?
FZT493ATA uses standard SOT223 pinout (E-B-C with collector tab), matching industry layout conventions. However, electrical parameters-including hFE, VCE(sat), and fT-differ significantly from generic SOT223 transistors. Direct substitution requires validation of gain, saturation voltage, and thermal behavior in the target circuit.
Does FZT493ATA require a heatsink in typical applications?
No external heatsink is required when mounted on ≥25mm² of 2oz copper per the datasheet's Note 5. The SOT223 collector tab provides sufficient thermal conduction for 1A continuous operation at ambient ≤70°C. Heatsinking becomes necessary only under high ambient (>85°C) or high-duty-cycle pulsed conditions exceeding 2A peak.
How does AEC-Q101 qualification impact FZT493ATA's use in non-automotive designs?
AEC-Q101 qualification ensures enhanced reliability-tested for temperature cycling, humidity, mechanical shock, and ESD (HBM = 4kV)-making FZT493ATA especially robust for industrial environments with wide temperature swings, vibration, or contamination. These tests exceed standard industrial grade requirements, offering built-in margin for mission-critical non-automotive use.
FZT493ATA 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 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 250mA, 10V
- Power - Max:
- 2 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT493ATA FAQ
1.How can I place an order for FZT493ATA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT493ATA 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 FZT493ATA reliable?
The price and inventory of FZT493ATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT493ATA is usually 5 days.
3.What payment methods are accepted for FZT493ATA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT493ATA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT493ATA?
FZT493ATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT493ATA 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 FZT493ATA?
For technical support, including FZT493ATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT493ATA requirements.
6.How does Aetrix verify that FZT493ATA is sourced from the original manufacturer or authorized distributors?
All FZT493ATA 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 FZT493ATA meets industry standards.
7.What is the process for return or replacement of FZT493ATA?
All FZT493ATA units undergo pre-shipment inspection (PSI). If there is an issue with FZT493ATA, 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 FZT493ATA part is unused and in its original packaging.
Return procedure for FZT493ATA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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