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Diodes Incorporated FZT589TC
- Part No.:
- FZT589TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT589TC.pdf
- Description:
- TRANS PNP 30V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,582
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Product details
Overview
FZT589TC from Diodes Incorporated is a 30V PNP medium-power transistor in SOT223 package, rated for -1A continuous collector current, with VCE(sat) < -0.35V at -1A and hFE up to 300 at -1mA. It serves as a high-current switching or linear amplification device in DC-DC converters, LED drivers, and power management circuits.
For engineers reviewing the FZT589TC datasheet, FZT589TC pinout, FZT589TC application, or FZT589TC equivalent, key selection criteria include guaranteed -30V VCEO, low saturation voltage under high current, thermal resistance of 41.7°C/W on 50mm×50mm copper, JEDEC-qualified reliability, and complementary pairing with FZT489.
Technical Context
The FZT589TC operates as a silicon PNP bipolar junction transistor optimized for medium-power switching and analog amplification. Its design supports stable DC biasing with hFE = 100–300 across IC = -1mA to -2A and maintains low VCE(sat) down to -0.35V at -1A/IB = -100mA.
Thermal performance is defined for two PCB mounting conditions: RθJA = 62.5°C/W (25mm×25mm copper) and 41.7°C/W (50mm×50mm copper), with RθJL = 19.4°C/W to collector lead-enabling accurate junction temperature estimation in thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -30 V: Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in high-side switch or amplifier configurations. |
| IC (cont.) | -1 A: Continuous collector current rating; enables use in 1A load-switching applications without forced cooling. |
| VCE(sat) | < -0.35 V @ -1A: Low saturation voltage reduces conduction loss and self-heating in switching mode. |
| hFE | 100–300: DC current gain across -1mA to -2A; supports predictable base drive sizing for both linear and saturated operation. |
| fT | 100 MHz: Transition frequency; confirms usable bandwidth for low-to-moderate speed switching (e.g., PWM up to ~10 MHz). |
| RθJA | 41.7 °C/W (50mm×50mm Cu): Thermal resistance enabling ~70°C rise at 2W dissipation-validates suitability for compact industrial power stages. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin configuration with collector tab (pin 1), emitter (pin 2), base (pin 3), and collector (pin 4). Molded green plastic housing, UL 94V-0 rated, 0.112 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Collector Tab) | Main collector connection and thermal path | Exposed metal tab electrically connected to collector; must be soldered to large copper pour for thermal management. |
| Pin 2 (Emitter) | Emitter terminal | Common reference node in common-base or common-collector configurations; polarity-sensitive for PNP operation. |
| Pin 3 (Base) | Control input | Receives negative base current to turn on; requires current-limiting resistor to prevent overdrive. |
| Pin 4 (Collector) | Secondary collector connection | Redundant collector terminal for improved current sharing and lower parasitic inductance in high-frequency switching. |
Key Features
| Feature | Design Value |
|---|---|
| High current capability | -1A continuous collector current supports direct driving of solenoids, relays, and LED strings without external buffering. |
| Low saturation voltage | VCE(sat) < -0.35V at -1A minimizes power loss and improves efficiency in battery-powered or thermally limited systems. |
| Wide hFE range | hFE = 100–300 across -1mA to -2A ensures consistent gain behavior across operating points for reliable bias design. |
| JEDEC-qualified reliability | Qualified to JEDEC standards per AEC-Q references; suitable for industrial and automotive-adjacent applications requiring proven long-term stability. |
Applications
| DC-DC Converter Switch | LED Constant-Current Driver |
|---|---|
Use Scenario: Used as main switching transistor in non-synchronous buck or linear regulator stages delivering up to 1A output. IC Role / Device Role / Timing Role: PNP switch controlling power delivery to output stage; driven by PWM controller or op-amp feedback loop. Use Value: Low VCE(sat) reduces conduction loss, while robust hFE simplifies gate/base driver design and improves regulation accuracy. | Use Scenario: Serves as current-regulating pass element in constant-current LED driver for signage or automotive lighting. IC Role / Device Role / Timing Role: Linear current source configured in emitter-follower topology with sense-resistor feedback. Use Value: High hFE and tight VBE(on) tolerance (-1.1V typ) enable precise current setting with minimal base drive overhead. |
| Industrial Load Switch | Complementary Pair Amplifier |
Use Scenario: Controls 12V/24V solenoid, relay, or motor loads in PLC I/O modules and factory automation controllers. IC Role / Device Role / Timing Role: High-side switch interfacing microcontroller GPIOs to inductive loads via base resistor network. Use Value: -30V VCEO and 4kV HBM ESD rating ensure robustness against inductive kickback and board-level ESD events. | Use Scenario: Paired with NPN FZT489 in push-pull Class AB audio or signal amplifiers for balanced drive capability. IC Role / Device Role / Timing Role: PNP half of complementary output stage; handles negative swing with matched thermal and gain characteristics. Use Value: Matched fT and hFE profile with FZT489 minimizes crossover distortion and improves thermal tracking in dual-rail designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX692B | VCEO = -30V, IC = -1.5A, VCE(sat) = -0.4V @ -1A, SOT89 package | SOT89 has higher thermal resistance (RθJA ≈ 100°C/W); less effective heat spreading than SOT223's exposed tab. | Prefer when footprint space is constrained but thermal margin allows higher RθJA. |
| MJD2955G | VCEO = -60V, IC = -10A, TO-220 package, higher VCE(sat) (-1.1V @ -5A) | TO-220 requires heatsink for >1A; over-spec'd voltage rating increases cost and layout area. | Select only when ≥60V blocking or >1A continuous current is required; otherwise over-engineered. |
Compared with ZTX692B and MJD2955G, the FZT589TC offers optimal balance of SOT223 thermal performance, -30V/1A rating, and low saturation voltage-making it ideal for space-constrained industrial and LED driver designs where thermal efficiency and footprint matter most.
Availability
FZT589TC is available at Aetrix Electronics and suitable for DC-DC converters, LED drivers, industrial load switches, and complementary amplifier stages requiring stable component supply, JEDEC-qualified reliability, and RoHS-compliant packaging.
Supply support for FZT589TC 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 the Americas.
The FZT589TC belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-effective, thermally efficient medium-power switching and amplification in industrial, consumer, and automotive-adjacent applications.
FAQ
What is the maximum safe operating temperature for FZT589TC?
The FZT589TC has an operating junction temperature range of -55°C to +150°C. With RθJA = 41.7°C/W on 50mm×50mm copper, it can safely dissipate 2W continuously at ambient temperatures up to +80°C-provided the PCB layout meets recommended pad dimensions and copper area.
Is FZT589TC pin-compatible with FZT489?
No-FZT589TC (PNP) and FZT489 (NPN) are complementary devices with identical SOT223 pinout (collector-tab/emitter/base/collector), but opposite polarity. They share mechanical compatibility and thermal design rules, enabling symmetrical layout in push-pull circuits, though electrical connections must respect PNP/NPN biasing requirements.
Does FZT589TC require a heatsink in standard applications?
A dedicated heatsink is not required for ≤1A continuous operation at ambient ≤60°C with proper PCB copper area (50mm×50mm, 2oz). The SOT223 collector tab provides sufficient thermal conduction to internal copper layers; heatsinking becomes necessary only above 1.5A or in sealed enclosures exceeding 70°C ambient.
How does the "Green" designation affect FZT589TC's material composition?
The "Green" designation certifies that FZT589TC uses halogen- and antimony-free molding compound (<900ppm Br, <900ppm Cl, <1000ppm Sb), meeting Diodes' environmental standards and EU RoHS 3 compliance. This eliminates corrosive decomposition products during reflow or end-of-life incineration without compromising mechanical or thermal performance.
FZT589TC 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:
- PNP
- 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 @ 500mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT589TC FAQ
1.How can I place an order for FZT589TC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT589TC 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 FZT589TC reliable?
The price and inventory of FZT589TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT589TC is usually 5 days.
3.What payment methods are accepted for FZT589TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT589TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT589TC?
FZT589TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT589TC 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 FZT589TC?
For technical support, including FZT589TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT589TC requirements.
6.How does Aetrix verify that FZT589TC is sourced from the original manufacturer or authorized distributors?
All FZT589TC 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 FZT589TC meets industry standards.
7.What is the process for return or replacement of FZT589TC?
All FZT589TC units undergo pre-shipment inspection (PSI). If there is an issue with FZT589TC, 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 FZT589TC part is unused and in its original packaging.
Return procedure for FZT589TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT589TC Tags
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Diodes Incorporated
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Diodes Incorporated
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