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Diodes Incorporated FZT489TA
- Part No.:
- FZT489TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT489TA.pdf
- Description:
- TRANS NPN 30V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,054
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Product details
Overview
FZT489TA 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 industrial motor drive base circuits.
For engineers reviewing the FZT489TA datasheet, FZT489TA pinout, FZT489TA application, or FZT489TA equivalent, key selection criteria include verified VCEO = 30V rating, hFE = 100–300 across 1mA–4A, thermal resistance RθJL = 19.4°C/W, RoHS-compliant matte tin plating, and complementary PNP pairing with FZT589.
Technical Context
This NPN bipolar junction transistor operates in linear and saturated switching modes, supporting high-current switching with low VCE(sat) and stable hFE up to 150°C junction temperature. Its 50V VCBO and 7V VEBO ratings enable robust operation in inductive load environments with voltage transients.
The device uses a thermally optimized SOT223 (Type DN) package with exposed collector lead acting as both electrical terminal and primary heat path, delivering RθJL = 19.4°C/W and enabling 1.2W dissipation on minimum pad layout per JEDEC derating curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum safe collector-emitter voltage under operating conditions |
| IC (continuous) | 1 A - Sustained current handling without thermal shutdown in standard PCB layouts |
| VCE(sat) | 0.6 V @ IC=2A/IB=200mA - Low conduction loss in switching applications |
| hFE | 100–300 - Stable current gain across 1mA–4A range supports predictable base drive design |
| fT | 150 MHz - Enables use in medium-frequency switching (e.g., <500 kHz SMPS) |
| RθJL | 19.4 °C/W - Junction-to-lead thermal resistance enables direct heatsinking via collector pad |
| ESD HBM | 4,000 V - Robust handling during board assembly and handling |
Pinout & Package
SOT223 (Type DN) package with three terminals: emitter (E), base (B), and collector (C); collector lead is internally connected to the large exposed copper tab for enhanced thermal and current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (Tab) | Main current output path and thermal interface | Electrically connected to exposed metal tab; must be soldered to ≥25 mm² copper area for rated power dissipation |
| Base | Current-controlled input node | Receives forward-biased drive to control collector current; requires 100–200 mA for full saturation at 1–2 A |
| Emitter | Reference return path | Common reference for base-emitter junction; tied to ground or low-side return in most switch configurations |
Key Features
| Feature | Design Value |
|---|---|
| High current capability | 1 A continuous / 4 A pulsed enables replacement of TO-92 devices in space-constrained power stages |
| Low saturation voltage | VCE(sat) ≤ 0.6 V reduces conduction losses by >30% vs. legacy SOT-23 transistors at 2 A |
| Thermally enhanced package | RθJL = 19.4°C/W allows direct thermal coupling to PCB copper, eliminating need for external heatsinks below 1.2 W |
| Automotive-grade variant available | FZT489Q meets AEC-Q101 requirements for under-hood and body electronics |
| Green manufacturing compliance | Halogen- and antimony-free, RoHS 3 compliant with <900 ppm Br/Cl and <1000 ppm Sb |
Applications
| DC-DC Converter Switching Stage | Industrial Motor Drive Base Circuit |
|---|---|
Use Scenario: High-efficiency buck converter in programmable logic controller (PLC) power supply modules. IC Role / Device Role / Timing Role: NPN switch controlling energy transfer through power inductor; driven by PWM signal from controller IC. Use Value: 0.6 V VCE(sat) minimizes conduction loss at 1–2 A load, improving efficiency over discrete alternatives with >1.0 V drop. | Use Scenario: Base drive for gate driver ICs in 24 V brushless DC motor control boards. IC Role / Device Role / Timing Role: Level-shifting and current amplification stage between microcontroller GPIO and high-side driver input. Use Value: hFE ≥ 100 at 1 A ensures reliable turn-on of driver ICs with minimal MCU drive current. |
| LED Driver Current Sink | Power Supply Enable Switch |
Use Scenario: Constant-current sink for high-brightness LED strings in industrial signage systems. IC Role / Device Role / Timing Role: Linear current regulator configured with emitter resistor; dissipates up to 1.2 W at 30 V bus. Use Value: RθJL = 19.4°C/W enables stable operation without heatsink when mounted on 25 mm × 25 mm 2 oz copper. | Use Scenario: High-side enable switch for auxiliary 5 V rail in medical diagnostic equipment. IC Role / Device Role / Timing Role: Controlled power sequencing element activated by system supervisor IC. Use Value: 30 V VCEO and 4 A ICM support safe inrush current limiting and fault-tolerant startup sequencing. |
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 |
|---|---|---|---|
| ZXTN2010FHTA | Higher fT (250 MHz), lower IC (0.8 A continuous), SOT-23 package | Not suitable for >1 A DC loads; limited thermal mass for sustained power dissipation | Select only for high-speed, low-current switching where board space is critical |
| MJD44H11T4G | TO-252 package, higher IC (8 A), higher VCEO (80 V), larger footprint | Requires PCB real estate and thermal vias; over-specified for 30 V/1 A use cases | Prefer when >3 A peak or >60 V blocking is required; avoid if SOT223 form factor is mandatory |
Compared with ZXTN2010FHTA and MJD44H11T4G, FZT489TA uniquely balances 1 A continuous current, 30 V rating, SOT223 thermal performance, and RoHS/Green compliance-making it optimal for space- and efficiency-constrained industrial power stages where neither ultra-high speed nor ultra-high voltage is needed.
Availability
FZT489TA is available at Aetrix Electronics and suitable for DC-DC converters, industrial motor drives, LED current sinks, and power supply enable switches requiring stable component supply and automotive-qualified alternatives (FZT489Q).
Supply support for FZT489TA 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, serving industrial, computing, communications, and consumer markets with high-reliability components.
FZT489TA belongs to Diodes' medium-power bipolar transistor product line, engineered for high-current switching in compact surface-mount packages while maintaining thermal robustness and process consistency across automotive and industrial temperature ranges.
FAQ
What is the maximum allowable junction temperature for FZT489TA?
The absolute maximum junction temperature is +150°C, with continuous operation supported from –55°C to +150°C ambient. Derating begins above +25°C ambient per Figure 4 in DS33134 Rev. 6–2, where power dissipation drops linearly to 1.2 W at +100°C ambient on minimum pad layout.
Is FZT489TA pin-compatible with FZT589?
No - FZT489TA (NPN) and FZT589 (PNP) share identical SOT223 (Type DN) mechanical packaging and pinout orientation (E-B-C tab), but polarity reversal means they are complementary-not interchangeable-devices. Substitution requires circuit topology changes including bias polarity and signal inversion.
Does FZT489TA require a heatsink in typical applications?
Not for ≤1.2 W dissipation on minimum recommended pad layout (per Note 8), or ≤2.0 W on 25 mm × 25 mm 1 oz copper. The exposed collector tab provides sufficient thermal conduction when soldered to adequate PCB copper; external heatsinks are unnecessary unless operating continuously above 1.6 W at elevated ambient temperatures.
How does the "Green" designation impact soldering and reliability?
The halogen- and antimony-free "Green" molding compound meets IPC-J-STD-020 moisture sensitivity Level 1, allowing unlimited floor life before reflow. Matte tin plating ensures compatibility with standard SnPb and lead-free solder profiles, and has demonstrated >1,000 thermal cycles without intermetallic degradation in accelerated life testing.
FZT489TA 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):
- 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
FZT489TA FAQ
1.How can I place an order for FZT489TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT489TA 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 FZT489TA reliable?
The price and inventory of FZT489TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT489TA is usually 5 days.
3.What payment methods are accepted for FZT489TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT489TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT489TA?
FZT489TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT489TA 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 FZT489TA?
For technical support, including FZT489TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT489TA requirements.
6.How does Aetrix verify that FZT489TA is sourced from the original manufacturer or authorized distributors?
All FZT489TA 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 FZT489TA meets industry standards.
7.What is the process for return or replacement of FZT489TA?
All FZT489TA units undergo pre-shipment inspection (PSI). If there is an issue with FZT489TA, 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 FZT489TA part is unused and in its original packaging.
Return procedure for FZT489TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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