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Diodes Incorporated FZT951QTC
- Part No.:
- FZT951QTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT951QTC.pdf
- Description:
- TRANS PNP 60V 5A SOT-223
- Quantity:
- Payment:
- Shipping:
Inventory:9,967
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Product details
Overview
FZT951QTC from Diodes Incorporated is a 60V PNP medium-power transistor in SOT223 package, rated for -5A continuous collector current and -15A peak pulse current, with VCE(SAT) < -140mV at -1A and RCE(SAT) = 55mΩ; used in automotive power switching, load control, and high-reliability DC-DC converter output stages.
For engineers reviewing the FZT951QTC datasheet, FZT951QTC pinout, FZT951QTC application, or FZT951QTC equivalent, key selection criteria include AEC-Q101 qualification, low saturation resistance, high gain up to -10A, thermal performance on 25mm×25mm 1oz copper, and complementary pairing with FZT851 NPN.
Technical Context
This PNP bipolar junction transistor operates in linear and saturated switching modes with guaranteed BVCEO = -60V and BVCBO = -100V, supporting robust blocking in automotive 48V and industrial 24V rail applications. Its hFE remains ≥75 at -5A and ≥10 at -10A, enabling stable current amplification across wide load ranges.
Thermal design is enabled by RθJA = 78°C/W (25mm×25mm 1oz Cu) and RθJL = 8.8°C/W, with safe operating area validated for single-pulse widths from 100μs to DC under -60V/-5A conditions. ESD ratings meet HBM 8kV and MM 400V per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60V - Maximum sustainable collector-emitter voltage before breakdown in common-emitter configuration |
| IC (cont.) | -5A - Continuous collector current rating defining steady-state power handling capability |
| VCE(SAT) | < -140mV @ -1A - Low saturation voltage ensures minimal conduction loss in switching applications |
| RCE(SAT) | 55mΩ - Equivalent on-resistance derived from VCE(SAT)/IC, critical for thermal management |
| hFE | 75–200 - DC current gain specified from -10mA to -5A, supporting reliable base drive sizing |
| fT | 120MHz - Transition frequency indicating usable bandwidth for moderate-speed switching |
| ESD HBM | 8000V - Human Body Model rating confirming robustness against assembly-level electrostatic discharge |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, thermally enhanced plastic case with exposed collector tab; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.112g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to higher potential rail in PNP switch; carries full load current |
| Collector (C) | Current source terminal | Exposed metal tab for thermal dissipation and electrical connection to load return path |
| Base (B) | Control input | Receives negative bias current to turn device ON; requires ~500mA for full -5A saturation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power modules requiring extended temperature (-55°C to +150°C) and reliability compliance |
| Low RCE(SAT) | 55mΩ enables ≤0.275W conduction loss at -5A, reducing heatsink requirements |
| High ICM | -15A peak pulse rating supports surge-tolerant motor driver and solenoid control |
| Green construction | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meeting RoHS 3 and automotive environmental mandates |
Applications
| Automotive Body Control Module | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: Driving 12V/24V solenoids and relays in door lock, mirror fold, and lighting control units. IC Role / Device Role / Timing Role: PNP high-side switch providing controlled current sink to ground for load activation. Use Value: AEC-Q101 qualification and -55°C to +150°C operation ensure functional safety in under-hood environments. | Use Scenario: Synchronous rectification or post-regulation switching in isolated flyback and forward converters. IC Role / Device Role / Timing Role: Medium-power PNP switch managing output current delivery with low VCE(SAT) to minimize conduction loss. Use Value: 55mΩ RCE(SAT) reduces thermal stress versus standard transistors, enabling smaller PCB footprints. |
| LED Driver for Commercial Lighting | Power Supply OR-ing Circuit |
Use Scenario: Constant-current dimming control of high-brightness LED strings in streetlight and signage systems. IC Role / Device Role / Timing Role: Linear-mode current regulator with hFE stability up to -5A ensuring precise current setting. Use Value: Guaranteed hFE ≥75 at -5A allows predictable base drive design without margin overdesign. | Use Scenario: Redundant power path selection in telecom and server PSUs using back-to-back PNP configuration. IC Role / Device Role / Timing Role: High-current, low-loss reverse-polarity blocking element in diode-replacement OR-ing topology. Use Value: VCE(SAT) < -140mV at -1A yields lower forward drop than Schottky diodes, improving efficiency at >1A loads. |
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 |
|---|---|---|---|
| ZXTN25050DFH | SOT223 PNP, VCEO = -50V, IC = -3A, RCE(SAT) = 110mΩ, no AEC-Q101 rating | Limited to non-automotive industrial use due to lower voltage/current rating and absence of automotive qualification | Select when cost sensitivity outweighs AEC-Q101 requirement and 50V/3A suffices |
| MJD2955RLG | TO-225 PNP, VCEO = -60V, IC = -10A, RCE(SAT) = 120mΩ, larger footprint, no green/halogen-free certification | Requires more PCB area and lacks RoHS 3 compliance; suitable only where higher current justifies package size penalty | Choose only if -10A continuous rating is mandatory and SOT223 thermal limits are insufficient |
Compared with ZXTN25050DFH and MJD2955RLG, FZT951QTC uniquely balances AEC-Q101 compliance, 60V/5A capability, 55mΩ on-resistance, and halogen-free construction in SOT223-making it optimal for space-constrained, thermally demanding automotive and industrial switching.
Availability
FZT951QTC is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, commercial LED drivers, and redundant power supply OR-ing circuits requiring stable component supply with full traceability and lifecycle support.
Supply support for FZT951QTC 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 North America.
FZT951QTC belongs to Diodes' AEC-Q101-qualified power transistor product line, engineered specifically for high-reliability automotive and industrial switching applications demanding robust thermal performance and green material compliance.
FAQ
What is the maximum allowable junction temperature for FZT951QTC?
The absolute maximum junction temperature is +150°C, with continuous operation supported from -55°C to +150°C ambient. Derating begins above +25°C at 12.8mW/°C on 25mm×25mm 1oz copper, ensuring safe thermal operation up to TJ = 150°C under defined PCB conditions.
Is FZT951QTC pin-compatible with FZT951TA or FZT951TC?
Yes-FZT951QTC shares identical SOT223 pinout, electrical specifications, and thermal characteristics with FZT951TA and FZT951TC. The "Q" prefix denotes automotive qualification and PPAP capability; all three variants use the same die and package, differing only in test screening and traceability documentation.
How does the RCE(SAT) value translate to real-world power loss?
At -5A collector current, RCE(SAT) = 55mΩ yields PLOSS = IC² × RCE(SAT) = 1.375W. This is verified by VCE(SAT) = -370mV at -5A in datasheet Table 3, confirming conduction loss aligns with resistive model for accurate thermal modeling.
Can FZT951QTC replace an NPN transistor in a circuit?
No-it is a PNP device and cannot directly substitute for an NPN without inverting biasing and signal polarity. It serves as a high-side switch sinking current to ground, whereas NPNs typically act as low-side switches. Complementary use with FZT851 NPN is supported for push-pull or H-bridge topologies.
FZT951QTC 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:
- PNP
- Current - Collector (Ic) (Max):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 460mV @ 500mA, 5A
- Current - Collector Cutoff (Max):
- 50nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 2A, 1V
- Power - Max:
- 1.6 W
- Frequency - Transition:
- 120MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
FZT951QTC FAQ
1.How can I place an order for FZT951QTC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT951QTC 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 FZT951QTC reliable?
The price and inventory of FZT951QTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT951QTC is usually 5 days.
3.What payment methods are accepted for FZT951QTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT951QTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT951QTC?
FZT951QTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT951QTC 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 FZT951QTC?
For technical support, including FZT951QTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT951QTC requirements.
6.How does Aetrix verify that FZT951QTC is sourced from the original manufacturer or authorized distributors?
All FZT951QTC 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 FZT951QTC meets industry standards.
7.What is the process for return or replacement of FZT951QTC?
All FZT951QTC units undergo pre-shipment inspection (PSI). If there is an issue with FZT951QTC, 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 FZT951QTC part is unused and in its original packaging.
Return procedure for FZT951QTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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