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Diodes Incorporated FZT489TC
- Part No.:
- FZT489TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT489TC.pdf
- Description:
- TRANS NPN 30V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,753
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Product details
Overview
FZT489TC from Diodes Incorporated is a 30V NPN medium-power transistor in SOT223 package, rated for 1A continuous collector current and 4A peak pulse current, with VCE(sat) ≤ 0.6V at IC = 2A/IB = 200mA, used in DC-DC converter switching stages and motor drive interface circuits.
For engineers reviewing the FZT489TC datasheet, FZT489TC pinout, FZT489TC application, or FZT489TC equivalent, key selection criteria include verified VCEO = 30V rating, hFE = 100–300 across 1mA–4A, thermal resistance RθJL = 19.4°C/W, and RoHS-compliant matte tin-plated leads suitable for industrial power control designs.
Technical Context
This NPN bipolar junction transistor operates as a medium-power switch with complementary PNP pairing (FZT589), supporting linear and saturated-mode operation up to +150°C junction temperature. Its design emphasizes low VCE(sat) and high IC capability under pulsed conditions (duty cycle ≤2%, pulse width ≤300µs).
Thermal performance is defined across multiple PCB mounting configurations: RθJA = 41.7°C/W on 50mm×50mm 2oz copper, de-rating to 104°C/W on minimum pad layout. ESD robustness includes 4kV HBM and 400V MM ratings per JEDEC JESD22-A114/A115.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC (continuous) | 1 A - Sustained collector current without thermal derating on standard 2oz copper PCB |
| VCE(sat) | 0.6 V @ IC=2A/IB=200mA - Low saturation voltage enables <1.2W conduction loss in switching applications |
| hFE | 100–300 - DC current gain range supports stable base drive design across 1mA–4A operating currents |
| fT | 150 MHz - Transition frequency confirms usable bandwidth for PWM frequencies up to ~10–20MHz |
| RθJL | 19.4 °C/W - Junction-to-lead thermal resistance enables direct heatsinking via collector lead in SOT223 |
| ESD HBM | 4,000 V - Human Body Model rating allows handling without special ESD controls in assembly |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-terminal plastic molded case with exposed collector tab for thermal conduction. Weight: 0.112 g. UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Low-impedance path to ground reference; connected to internal emitter region with minimal parasitic inductance |
| Base (B) | Control input | Receives forward-biased current to enable conduction; requires ≥100mA for full saturation at 1A load |
| Collector (C) | Current source terminal | Connected to exposed metal tab; primary thermal path and high-current output node |
| Collector Tab (C) | Thermal & electrical node | Electrically identical to Collector pin; soldered directly to PCB copper pour for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| High current capability | 1A continuous / 4A pulsed rating enables use in 5–24V DC-DC power stage switches without paralleling |
| Low saturation voltage | VCE(sat) ≤ 0.6V at 2A ensures <1.2W conduction loss, reducing thermal stress in compact layouts |
| Automotive-grade variant available | FZT489Q version meets AEC-Q101 requirements for under-hood and body electronics |
| Green manufacturing compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) and RoHS 3 compliant per EU directives |
Applications
| Industrial Motor Drive Interface | 12V Automotive Lighting Control |
|---|---|
Use Scenario: Driving brushed DC motors in HVAC actuators and seat positioners requiring bidirectional PWM control at 1–5A peak. IC Role / Device Role / Timing Role: NPN switch controlling motor current path to ground; operated in saturation mode with microcontroller GPIO base drive. Use Value: VCE(sat) ≤ 0.6V minimizes power loss and self-heating during 100% duty-cycle stall conditions. | Use Scenario: Switching LED headlamp arrays and interior lighting modules in 12V vehicle systems with transient voltage protection. IC Role / Device Role / Timing Role: High-side or low-side load switch interfacing between MCU and LED string, handling inrush and PWM dimming. Use Value: 30V VCEO withstands automotive load-dump transients up to 35V, eliminating need for external clamping diodes. |
| DC-DC Converter Power Stage | Industrial PLC Output Module |
Use Scenario: Asynchronous rectifier or main switch in non-synchronous buck converters delivering 3.3V/5V/12V at up to 2A output. IC Role / Device Role / Timing Role: Primary switching element in discrete step-down regulator; driven by PWM controller with gate/base driver circuitry. Use Value: fT = 150MHz supports clean switching edges at 500kHz–1MHz switching frequencies, reducing EMI filtering burden. | Use Scenario: Solid-state relay replacement in programmable logic controller output cards driving solenoids, valves, and indicators. IC Role / Device Role / Timing Role: Isolated load switch controlled via optocoupler or digital isolator; provides galvanically separated 24V DC output switching. Use Value: RθJL = 19.4°C/W allows direct thermal coupling to chassis-mounted copper, enabling 1A sustained current without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25040DFH | Higher VCEO = 40V; lower VCE(sat) = 0.25V @ 1A; SOT89 package | Suitable for higher-voltage 24–48V industrial supplies where lower conduction loss is critical | Select when board space permits SOT89 and system voltage exceeds 30V |
| MJD44H11T4G | TO-252 package; higher IC = 8A continuous; VCEO = 80V; slower fT = 3MHz | Better for high-current linear regulators and analog amplifiers needing rugged packaging | Choose for >3A loads or where mechanical robustness outweighs switching speed |
Compared with ZXTN25040DFH and MJD44H11T4G, FZT489TC offers optimal balance of thermal efficiency (RθJL = 19.4°C/W), compact SOT223 footprint, and 30V/1A capability-ideal for space-constrained 12–24V power interfaces where cost and manufacturability are prioritized over extreme voltage or current margins.
Availability
FZT489TC is available at Aetrix Electronics and suitable for industrial motor drives, automotive lighting control, DC-DC converter power stages, and PLC output modules requiring stable component supply and long-term production continuity.
Supply support for FZT489TC 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 distribution operations across Asia, Europe, and the Americas.
FZT489TC belongs to Diodes' general-purpose bipolar transistor product line, engineered for reliable medium-power switching in industrial, automotive, and consumer power management systems where thermal performance and RoHS compliance are mandatory.
FAQ
What is the maximum junction temperature for FZT489TC?
The absolute maximum junction temperature is +150°C, with storage temperature matching this range. Operation above +125°C requires derating power dissipation per the datasheet's thermal curves, especially under ambient temperatures exceeding +85°C or with limited PCB copper area.
Is FZT489TC pin-compatible with FZT489TA?
Yes - both share identical SOT223 (Type DN) mechanical outline, pin assignment (E-B-C-tab), and electrical specifications. The "TC" and "TA" suffixes denote different reel packaging configurations (tape width and quantity), not functional or pinout differences.
Does FZT489TC require a heatsink in typical 1A applications?
No - with RθJL = 19.4°C/W and PD = 2.0W on 25mm×25mm 2oz copper, junction rise is ~39°C at full 1A conduction. A properly sized copper pour (≥25mm²) on the collector tab suffices; no external heatsink is needed unless ambient exceeds +70°C or duty cycle approaches 100%.
Can FZT489TC replace a MOSFET in low-side switching applications?
It can functionally replace low-voltage logic-level MOSFETs in <1A, <30V applications, but requires base current drive (≥100mA) versus gate charge. Use only where drive capability exists and VCE(sat) loss is acceptable - not recommended for battery-powered or high-efficiency designs where MOSFET RDS(on) would yield lower losses.
FZT489TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1A, 2V
- 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
FZT489TC FAQ
1.How can I place an order for FZT489TC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT489TC 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 FZT489TC reliable?
The price and inventory of FZT489TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT489TC is usually 5 days.
3.What payment methods are accepted for FZT489TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT489TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT489TC?
FZT489TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT489TC 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 FZT489TC?
For technical support, including FZT489TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT489TC requirements.
6.How does Aetrix verify that FZT489TC is sourced from the original manufacturer or authorized distributors?
All FZT489TC 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 FZT489TC meets industry standards.
7.What is the process for return or replacement of FZT489TC?
All FZT489TC units undergo pre-shipment inspection (PSI). If there is an issue with FZT489TC, 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 FZT489TC part is unused and in its original packaging.
Return procedure for FZT489TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT489TC Tags
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