My Inquiry
My Account
Diodes Incorporated FZT951QTA
- Part No.:
- FZT951QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT951QTA.pdf
- Description:
- TRANS PNP 60V 5A SOT-223
- Quantity:
- Payment:
- Shipping:
Inventory:1,538
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FZT951QTA from Diodes Incorporated is a 60V PNP medium-power bipolar junction transistor in SOT223 package, rated for -5A continuous collector current, -15A peak pulse current, and VCE(SAT) < -140mV at -1A. It delivers RCE(SAT) = 55mΩ and hFE ≥ 75 at -5A, supporting high-current switching in automotive power rails and industrial DC-DC converters.
For engineers reviewing the FZT951QTA datasheet, FZT951QTA pinout, FZT951QTA application, or FZT951QTA equivalent, key selection criteria include its AEC-Q101 qualification, low saturation voltage under high IC, thermal resistance of 42°C/W (52mm × 52mm 2oz Cu), and complementary pairing with FZT851 for push-pull topologies.
Technical Context
This PNP BJT operates as a high-current, medium-voltage switch with guaranteed gain up to -10A (hFE ≥ 10) and breakdown ratings of VCBO = -100V and VCEO = -60V. Its low VCE(SAT) and 55mΩ on-resistance enable efficient conduction in linear and saturated modes.
Thermal design is supported by RθJA = 42°C/W (on 52mm × 52mm 2oz Cu PCB) and RθJL = 8.8°C/W, while ESD robustness includes 8kV HBM and 400V MM ratings. The device is fully qualified to AEC-Q101 and PPAP-capable for automotive production use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60V - Maximum safe collector-emitter voltage before avalanche in common-emitter configuration |
| IC (cont.) | -5A - Continuous collector current enabling direct drive of 5A loads without external heatsinking on standard PCBs |
| VCE(SAT) | < -140mV @ -1A - Low conduction loss reduces power dissipation and self-heating in switching applications |
| hFE | 75 @ -5A - Stable current gain at high current ensures predictable base drive requirements |
| RθJA | 42°C/W - Thermal resistance enables 3W dissipation at +25°C ambient with 52mm × 52mm 2oz Cu layout |
| ESD HBM | 8000V - Robust electrostatic immunity supports handling and assembly in automotive manufacturing lines |
| AEC-Q101 | Qualified - Meets stress test requirements for temperature cycling, HTGB, and HTRB per automotive reliability standard |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin outline with exposed collector tab for thermal enhancement. Molded green compound, UL 94V-0 rated, 0.112g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Main current exit path; connected to load return or ground reference in high-side switch configurations |
| 2 (Base) | B | Control input requiring ~500mA drive at -5A IC; designed for direct microcontroller or driver IC interface |
| 3 (Collector) | C | Main current entry point; electrically and thermally tied to large copper pad for heat dissipation |
| 4 (Collector Tab) | C (thermal) | Exposed metal tab providing low-impedance thermal path to PCB; must be soldered to copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Low RCE(SAT) | 55mΩ - Enables <100mW conduction loss at -1A, reducing thermal burden in compact power stages |
| AEC-Q101 Qualification | Automotive-grade reliability - Validated for operation from -55°C to +150°C with full PPAP documentation support |
| High ICM | -15A peak pulse - Supports surge current handling in motor startup, solenoid actuation, and inrush limiting |
| Green Construction | Halogen- and antimony-free - Complies with RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1 |
| Complementary Pairing | FZT851 NPN match - Enables matched push-pull, H-bridge, and totem-pole output stage designs |
Applications
| Automotive Body Control Module (BCM) | Industrial DC-DC Converter Primary Switch |
|---|---|
Use Scenario: Driving 12V/24V solenoids, relays, and LED arrays in vehicle door modules and lighting control units. IC Role / Device Role / Timing Role: High-side PNP switch controlling load current with fast turn-on/off and low standby leakage. Use Value: -140mV VCE(SAT) at -1A minimizes voltage drop and heat generation in space-constrained BCM PCBs. | Use Scenario: Serving as the main switching element in non-isolated buck or SEPIC converters delivering 3–5A output. IC Role / Device Role / Timing Role: Medium-power synchronous rectifier or primary-side switch operating at ≤100kHz. Use Value: 75 hFE at -5A ensures stable gate/base drive across temperature, improving regulation accuracy. |
| Motor Driver Half-Bridge Stage | Hot-Swap Controller Current Limiter |
Use Scenario: Paired with FZT851 in complementary emitter-follower output stage for brushed DC motor control. IC Role / Device Role / Timing Role: PNP half-bridge leg providing bidirectional current sourcing/sinking capability. Use Value: Matched VCE(SAT) and hFE between FZT951QTA and FZT851 reduce shoot-through risk and improve efficiency. | Use Scenario: Limiting inrush current during hot-plug insertion of industrial backplane cards and modular power supplies. IC Role / Device Role / Timing Role: Linear-mode current limiter with precise VBE(ON) (-935mV) enabling accurate sense resistor biasing. Use Value: Tight VBE(ON) tolerance (-935 to -1070mV) ensures repeatable current limit threshold across production lots. |
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 |
|---|---|---|---|
| ZXTN25050DFHTA | SOT223 PNP, VCEO = -50V, IC = -3A, VCE(SAT) = -200mV @ -1A | Lower voltage rating and higher saturation voltage limit use in 24V+ systems and high-efficiency designs | Select when lower cost and adequate 50V margin suffice; not suitable for 48V automotive rail switching |
| MJD44H11T4G | TO-220 PNP, VCEO = -80V, IC = -8A, VCE(SAT) = -1.5V @ -4A | Larger package requires heatsink; higher VCE(SAT) increases conduction loss significantly | Choose only when >5A continuous current or >80V breakdown is mandatory; sacrifices board space and thermal efficiency |
Compared with ZXTN25050DFHTA and MJD44H11T4G, FZT951QTA uniquely balances 60V rating, -5A capacity, and sub-140mV saturation in SOT223-making it optimal for AEC-Q101-compliant, space-constrained 12V/24V automotive switches where thermal performance and reliability are prioritized over raw current headroom.
Availability
FZT951QTA is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, motor driver half-bridges, and hot-swap controller current limiters requiring stable component supply and AEC-Q101 compliance.
Supply support for FZT951QTA 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 power management, signal integrity, and protection devices.
FZT951QTA belongs to Diodes' AEC-Q101-qualified medium-power transistor product line, engineered specifically for automotive and industrial switching applications demanding robust thermal performance and long-term supply stability.
FAQ
What is the maximum allowable junction temperature for FZT951QTA?
The FZT951QTA has an operating junction temperature range of -55°C to +150°C. Its absolute maximum TJ is +150°C, validated per AEC-Q101 thermal stress testing. Derating begins at +25°C ambient using RθJA = 42°C/W (52mm × 52mm 2oz Cu), allowing 3.0W dissipation at room temperature.
Is FZT951QTA pin-compatible with other SOT223 PNP transistors?
FZT951QTA uses standard SOT223 pinout (Emitter-Base-Collector-Collector Tab), matching industry conventions. However, electrical parameters-including VCE(SAT), hFE, and thermal resistance-differ from generic SOT223 PNPs; substitution requires validation of gain, saturation voltage, and thermal performance in the target circuit.
Does FZT951QTA require a heatsink in typical applications?
At ≤1.5W dissipation on a 52mm × 52mm 2oz Cu PCB, no external heatsink is required due to RθJA = 42°C/W. For sustained 3W operation or in still-air enclosures, thermal simulation is recommended-but the exposed collector tab and low RCE(SAT) minimize reliance on added heatsinking.
How does the "Q" suffix in FZT951QTA indicate automotive qualification?
The "Q" in FZT951QTA explicitly denotes AEC-Q101 qualification and PPAP capability per Diodes Incorporated's ordering nomenclature. Unlike standard FZT951TA, the Q-suffix version undergoes additional stress testing, lot traceability, and process controls mandated for automotive production, with full documentation available upon request.
FZT951QTA 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
FZT951QTA FAQ
1.How can I place an order for FZT951QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT951QTA 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 FZT951QTA reliable?
The price and inventory of FZT951QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT951QTA is usually 5 days.
3.What payment methods are accepted for FZT951QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT951QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT951QTA?
FZT951QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT951QTA 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 FZT951QTA?
For technical support, including FZT951QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT951QTA requirements.
6.How does Aetrix verify that FZT951QTA is sourced from the original manufacturer or authorized distributors?
All FZT951QTA 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 FZT951QTA meets industry standards.
7.What is the process for return or replacement of FZT951QTA?
All FZT951QTA units undergo pre-shipment inspection (PSI). If there is an issue with FZT951QTA, 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 FZT951QTA part is unused and in its original packaging.
Return procedure for FZT951QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT951QTA Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
