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Diodes Incorporated FZT651TC
- Part No.:
- FZT651TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT651TC.pdf
- Description:
- TRANS NPN 60V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,689
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Product details
Overview
FZT651TC 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) < 300mV at 1A. It delivers low-saturation switching performance in automotive-grade power control, DC-DC converter output stages, and industrial motor driver interface circuits.
For engineers reviewing the FZT651TC datasheet, FZT651TC pinout, FZT651TC application, or FZT651TC equivalent, key selection criteria include its 60V VCEO, 2W/3W power dissipation (depending on PCB copper area), hFE range of 40–200 across 50mA–2A, and complementary pairing with FZT751 for push-pull designs.
Technical Context
The FZT651TC operates as a general-purpose NPN bipolar junction transistor optimized for medium-current switching and linear amplification. Its BVCEO = 60V and BVCBO = 80V support robust operation in 24V and 48V industrial bus systems, while its fT = 140–175MHz enables fast switching in PWM-driven loads.
Thermal design is defined by RθJA = 62.5°C/W (25mm × 25mm 2oz Cu) and 41.7°C/W (50mm × 50mm 2oz Cu), with RθJL = 12.9°C/W to collector lead - enabling direct thermal coupling to heatsinks via the tab. ESD ratings meet 4kV HBM and 400V MM per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60V - Supports reliable operation in 48V nominal systems with margin against transients. |
| IC (continuous) | 3A - Enables direct drive of solenoids, relays, and small motors without external buffering. |
| VCE(sat) @ 1A | 0.12–0.3V - Minimizes conduction loss and self-heating in high-duty-cycle switching. |
| hFE @ 1A | 40–80 - Ensures stable base drive requirements for predictable gate/base current sizing. |
| fT | 140–175MHz - Allows use in >100kHz PWM applications with controlled rise/fall times. |
| RθJL | 12.9°C/W - Permits efficient heat transfer from junction to PCB copper or external heatsink via collector tab. |
| ESD HBM | 4,000V - Reduces risk of handling damage during assembly in non-ESD-controlled environments. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, thermally enhanced plastic package with exposed collector tab for direct PCB thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; requires low-impedance trace for current return. |
| Base (B) | Control input | Driven with ~100mA for full saturation at 1A; requires series resistor to limit drive current. |
| Collector (C) | Current source terminal | Tab-connected to internal die; must be soldered to ≥25mm² copper for rated 2W dissipation. |
| Collector Tab (C) | Thermal & electrical node | Electrically identical to Collector pin; primary thermal path to PCB; not isolated. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | 0.12V typical at 1A - reduces power loss by >50% vs. standard 0.25V transistors in same footprint. |
| High ICM | 6A peak pulse - supports short-duration inrush current handling in relay/solenoid drivers. |
| Complementary PNP pair | FZT751 - enables matched push-pull output stages with consistent thermal and gain tracking. |
| AEC-Q101 qualified variant | FZT651Q available - meets automotive stress testing for under-hood temperature cycling and humidity exposure. |
| Green molding compound | UL 94V-0 rated, halogen/antimony-free - satisfies IPC-1752A environmental compliance for industrial OEMs. |
Applications
| Industrial Motor Interface | 48V DC-DC Converter Switch |
|---|---|
|
Use Scenario: Driving brushed DC motors in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: NPN switch controlling motor direction and enable via base-driven PWM. Use Value: 3A continuous rating handles stall currents of 24V/12W motors; low VCE(sat) limits thermal rise in compact DIN-rail enclosures. |
Use Scenario: High-side switch in synchronous buck converter auxiliary rail (5V/2A). IC Role / Device Role / Timing Role: Medium-power switching transistor in discrete step-down regulator feedback loop. Use Value: 175MHz fT ensures clean turn-on/turn-off at 200kHz switching frequency; RθJL enables direct thermal coupling to power plane. |
| Automotive HVAC Blower Control | Industrial Solenoid Driver |
|
Use Scenario: PWM-controlled blower fan in passenger compartment climate systems. IC Role / Device Role / Timing Role: Low-side switch modulating 12V/3A load with variable duty cycle. Use Value: AEC-Q101-compatible variant (FZT651Q) supports 105°C ambient operation; 4kV HBM withstands vehicle-level ESD events. |
Use Scenario: Actuating pneumatic valves in factory automation I/O modules. IC Role / Device Role / Timing Role: Constant-current saturated switch delivering 2.5A pulses to 24V solenoids. Use Value: 6A ICM accommodates 3× inrush surge; SOT223 tab allows mechanical mounting to metal chassis for added thermal mass. |
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 |
|---|---|---|---|
| ZXTN651MCTA | Higher VCEO (100V), lower IC (2.5A), SOT89 package | Better suited for 72V battery systems but less thermal headroom in SOT223 footprint | Select when higher voltage margin is critical and PCB layout allows SOT89 pad revision |
| MJD127G | TO-252 package, 100V VCEO, 8A IC, higher RθJA (65°C/W) | Higher power handling but larger footprint and inferior thermal resistance than SOT223 | Choose for >3A continuous loads where board space permits DPAK and thermal vias are limited |
Compared with ZXTN651MCTA and MJD127G, the FZT651TC offers optimal balance of 60V rating, 3A capability, and SOT223 thermal efficiency - making it preferred for space-constrained 24–48V industrial controls where thermal management relies on PCB copper rather than external heatsinks.
Availability
FZT651TC is available at Aetrix Electronics and suitable for industrial motor interface, 48V DC-DC converter switch, and automotive HVAC blower control requiring stable component supply and RoHS-compliant manufacturing.
Supply support for FZT651TC 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 and manufacturing facilities across Asia and the Americas.
The FZT651TC belongs to Diodes' medium-power bipolar transistor product line, engineered for high-reliability switching in industrial automation, automotive subsystems, and power conversion where thermal efficiency and ruggedness are prioritized over ultra-high speed.
FAQ
What is the maximum safe operating temperature for FZT651TC?
The FZT651TC has an operating junction temperature range of –55°C to +150°C. For continuous 3A operation, PCB layout must maintain TJ ≤ 150°C - achievable with ≥25mm² 2oz copper at 25°C ambient using the 62.5°C/W RθJA rating. Derating is required above 25°C ambient per the datasheet's thermal curve.
Is FZT651TC pin-compatible with FZT651TA?
Yes - both FZT651TC and FZT651TA share identical SOT223 (Type DN) package, pinout, and electrical specifications. The only difference is tape-and-reel packaging: FZT651TC ships in 4,000-unit reels (13-inch), while FZT651TA uses 1,000-unit reels (7-inch). No layout or schematic changes are needed.
Can FZT651TC replace a MOSFET in low-side switching applications?
It can, but with trade-offs: FZT651TC requires ~100mA base drive for 1A collector current (vs. gate charge-based drive for MOSFETs), and exhibits higher conduction loss than logic-level MOSFETs below 1V. Use it where BJT simplicity, cost, or SOA robustness outweighs gate-drive complexity and efficiency needs.
Does FZT651TC support automotive qualification out of the box?
No - the standard FZT651TC is not AEC-Q101 qualified. However, the functionally identical FZT651Q variant is fully qualified to AEC-Q101, PPAP-capable, and manufactured in IATF 16949-certified facilities. Automotive designs require explicit ordering of FZT651Q, not FZT651TC.
FZT651TC 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
FZT651TC FAQ
1.How can I place an order for FZT651TC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT651TC 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 FZT651TC reliable?
The price and inventory of FZT651TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT651TC is usually 5 days.
3.What payment methods are accepted for FZT651TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT651TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT651TC?
FZT651TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT651TC 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 FZT651TC?
For technical support, including FZT651TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT651TC requirements.
6.How does Aetrix verify that FZT651TC is sourced from the original manufacturer or authorized distributors?
All FZT651TC 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 FZT651TC meets industry standards.
7.What is the process for return or replacement of FZT651TC?
All FZT651TC units undergo pre-shipment inspection (PSI). If there is an issue with FZT651TC, 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 FZT651TC part is unused and in its original packaging.
Return procedure for FZT651TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT651TC Tags
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Diodes Incorporated
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