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Diodes Incorporated FZT651TA
- Part No.:
- FZT651TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT651TA.pdf
- Description:
- TRANS NPN 60V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,917
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Product details
Overview
FZT651TA from Diodes Incorporated is a 60V NPN medium-power transistor in SOT223 package, rated for 3A continuous collector current and 6A peak pulse current, with VCE(sat) < 300 mV at 1 A, used in automotive power switching, DC-DC converter output stages, and industrial motor drive interface circuits.
For engineers reviewing the FZT651TA datasheet, FZT651TA pinout, FZT651TA application, or FZT651TA equivalent, key selection criteria include breakdown voltage (VCEO = 60 V), thermal resistance (RθJA = 62.5 °C/W on 25 mm × 25 mm PCB), safe operating area under pulsed loads, complementary PNP pairing with FZT751, and AEC-Q101 qualification path via FZT651Q variant.
Technical Context
This NPN bipolar junction transistor operates in linear or saturated switching mode with guaranteed VCEO ≥ 60 V and VCBO ≥ 80 V, supporting high-voltage DC bus interfacing. Its hFE ranges from 40 to 200 across 50 mA–2 A collector currents, enabling stable gain-controlled amplification or robust current-driven switching.
Thermal performance is defined by RθJL = 12.9 °C/W (junction-to-leads) and derated power dissipation down to zero at +150 °C ambient. ESD robustness includes 4 kV HBM and 400 V MM ratings, meeting industrial handling requirements without additional protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum collector-emitter voltage before avalanche breakdown; enables use in 48 V automotive and 24 V industrial systems. |
| IC (continuous) | 3 A - Sustained collector current capability with adequate heatsinking; supports medium-power load switching. |
| VCE(sat) | 0.12–0.6 V @ IC/IB = 10–100 - Low saturation voltage reduces conduction loss and self-heating during switching. |
| fT | 140–175 MHz - Transition frequency confirms suitability for high-speed switching up to ~10 MHz with proper drive. |
| RθJA | 62.5 °C/W - Thermal resistance on 25 mm × 25 mm 2 oz copper; defines maximum power dissipation at given ambient temperature. |
| hFE | 40–200 - DC current gain variation across operating range; informs base drive design for reliable saturation. |
| ton/toff | 45 ns / 800 ns - Fast turn-on and controlled turn-off timing; supports PWM frequencies up to several hundred kHz. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-terminal plastic molded case with exposed collector tab for thermal conduction and mechanical anchoring.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Low-impedance return path; connected to ground or low-side reference in common-emitter configurations. |
| Base (B) | Control input | Receives forward-biased current to enable conduction; requires series resistor to limit IB per hFE target. |
| Collector (C) | High-current output | Connected to load and supply rail; electrically and thermally tied to exposed metal tab for heat transfer. |
| Collector Tab (C) | Thermal & electrical node | Same potential as collector pin; must be soldered to copper pour for RθJA compliance and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| High VCEO rating | 60 V ensures compatibility with 48 V battery systems and industrial 24–48 V rails without derating. |
| Low VCE(sat) | < 300 mV at 1 A enables ≤0.3 W conduction loss, reducing thermal stress in compact layouts. |
| SOT223 thermal design | Exposed collector tab and low RθJL (12.9 °C/W) allow direct PCB copper coupling for efficient heat extraction. |
| Automotive-ready qualification path | FZT651Q variant is AEC-Q101 qualified; standard FZT651TA shares identical die and construction. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: Driving solenoids, relays, and LED arrays in vehicle door modules and lighting control units. IC Role / Device Role / Timing Role: NPN switch controlling 12–48 V loads with PWM dimming or timed actuation. Use Value: 60 V VCEO withstands load-dump transients; 3 A IC supports multi-solenoid banks without parallel devices. | Use Scenario: Synchronous rectifier or freewheeling switch in non-isolated buck converters delivering 3–5 A at 3.3–12 V. IC Role / Device Role / Timing Role: Low-loss power switch in high-side or low-side configuration with fast ton/toff. Use Value: VCE(sat) < 0.3 V minimizes conduction loss; fT > 140 MHz supports clean switching edge integrity. |
| Motor Driver Interface Stage | Programmable Current Sink for Sensors |
Use Scenario: Level-shifting and current amplification between MCU GPIO and brushed DC motor H-bridge gate drivers. IC Role / Device Role / Timing Role: Medium-power buffer stage isolating logic-level signals from higher-current gate drive paths. Use Value: hFE ≥ 80 at 2 A ensures stable base drive margin; SOT223 mechanical robustness survives vibration environments. | Use Scenario: Precision current sink for analog sensor biasing (e.g., RTD, photodiode) in industrial process monitoring. IC Role / Device Role / Timing Role: Linear-mode current regulator with fixed emitter resistor and controlled VBE bias. Use Value: Tight VBE(on) (0.8–1.0 V) and hFE consistency enable ±1% current accuracy over temperature. |
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 |
|---|---|---|---|
| ON Semiconductor NSS60201MR6T1G | VCEO = 60 V, IC = 2 A, VCE(sat) = 0.25 V @ 1 A, SOT223 package | Lower continuous current rating; optimized for lower-power switching with tighter VCE(sat) tolerance | Select when load current ≤ 2 A and tighter saturation voltage spec is required. |
| STMicroelectronics BUZ900 | VCEO = 60 V, IC = 3 A, VCE(sat) = 0.5 V @ 1 A, TO-220 package | Larger through-hole package; higher RθJA (65 °C/W); no exposed thermal tab | Select when board space allows TO-220 and manual assembly is preferred over SMT. |
Compared with NSS60201MR6T1G and BUZ900, FZT651TA delivers higher continuous current (3 A) in a thermally optimized SOT223 package with lower RθJA and integrated thermal tab-making it optimal for space-constrained, medium-power SMT designs requiring robust transient handling.
Availability
FZT651TA is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC power supplies, and motor interface circuits requiring stable component supply, RoHS-compliant packaging, and traceable sourcing.
Supply support for FZT651TA 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, specializing in high-reliability components for automotive, industrial, and computing markets.
FZT651TA belongs to Diodes' medium-power bipolar transistor product line, designed specifically for robust, cost-effective switching in 12–48 V systems where thermal efficiency and transient resilience are critical.
FAQ
Is FZT651TA AEC-Q101 qualified?
No, FZT651TA is not AEC-Q101 qualified. However, the functionally identical FZT651Q variant is fully AEC-Q101 qualified and manufactured in IATF 16949-certified facilities. Both share the same die, package, and electrical specifications-only test reporting and documentation differ.
What is the recommended PCB layout for thermal performance?
For optimal thermal performance, solder the exposed collector tab to a minimum 25 mm × 25 mm copper pour on the top layer, connected via ≥4 thermal vias (0.3 mm diameter) to an internal or bottom-layer ground/power plane. Maintain clearance around the tab per Diodes' suggested pad layout (C1 = 6.40 mm, Y2 = 8.00 mm).
Can FZT651TA replace FZT751 in a circuit?
No-FZT651TA is NPN while FZT751 is its complementary PNP counterpart. They are not interchangeable. However, they are designed to pair in push-pull, H-bridge, or complementary Darlington configurations, sharing matching VCEO, IC, and thermal characteristics for balanced operation.
What is the maximum allowable base current for safe operation?
The absolute maximum base current is not explicitly specified, but safe operation requires limiting IB to ensure IC/IB ≤ 100 at full load. At IC = 3 A, IB should not exceed 30 mA. Exceeding this risks thermal runaway or secondary breakdown; always verify with VBE(sat) and hFE curves at operating temperature.
FZT651TA 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):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 500mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 175MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT651TA FAQ
1.How can I place an order for FZT651TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT651TA 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 FZT651TA reliable?
The price and inventory of FZT651TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT651TA is usually 5 days.
3.What payment methods are accepted for FZT651TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT651TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT651TA?
FZT651TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT651TA 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 FZT651TA?
For technical support, including FZT651TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT651TA requirements.
6.How does Aetrix verify that FZT651TA is sourced from the original manufacturer or authorized distributors?
All FZT651TA 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 FZT651TA meets industry standards.
7.What is the process for return or replacement of FZT651TA?
All FZT651TA units undergo pre-shipment inspection (PSI). If there is an issue with FZT651TA, 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 FZT651TA part is unused and in its original packaging.
Return procedure for FZT651TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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