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Diodes Incorporated FZT692BQTA
- Part No.:
- FZT692BQTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT692BQTA.pdf
- Description:
- TRANS NPN 70V 2A SOT-223
- Quantity:
- Payment:
- Shipping:
Inventory:8,589
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Product details
Overview
FZT692BQTA from Diodes Incorporated is a 70V, 2A NPN medium-power high-gain transistor in SOT223 package, featuring hFE ≥ 400 at IC = 0.5A, VCEO = 70V, and PD = 3W (on 50mm × 50mm 2oz Cu), used in automotive-grade relay drivers and DC-DC converter switching stages.
For engineers reviewing the FZT692BQTA datasheet, FZT692BQTA pinout, FZT692BQTA application, or FZT692BQTA equivalent, key selection criteria include AEC-Q101 qualification, SOT223 thermal performance (RθJA = 41.7°C/W), complementary pairing with FZT792A, and Darlington replacement capability under 2A continuous load.
Technical Context
This NPN bipolar junction transistor delivers high DC current gain across 0.1–2A collector current range, with guaranteed hFE ≥ 500 at IC = 100mA and ≥ 400 at IC = 500mA. Its 70V breakdown ratings (VCBO, VCEO) support robust operation in 48V industrial and 12V/24V automotive power control circuits.
The device exhibits fast switching performance (ton = 46ns, toff = 1440ns) and low saturation voltage (VCE(sat) ≤ 500mV at IC = 2A/IB = 200mA), enabling efficient use in pulse-width modulated loads and solenoid drive applications requiring minimal conduction loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 70 V - Withstands 70V collector-emitter voltage before breakdown, suitable for 48V bus switching |
| IC (continuous) | 2 A - Supports sustained 2A load current without derating on standard PCB copper area |
| hFE | ≥400 @ 0.5A - Enables low-base-drive design for efficient gate/base control in driver stages |
| VCE(sat) | ≤500 mV @ 2A/200mA - Limits conduction loss to <1W at full load, reducing thermal stress |
| fT | 150 MHz - Supports switching up to ~10–20MHz in small-signal amplification or fast-switching apps |
| RθJA | 41.7 °C/W - Achieves 3W dissipation with ≤125°C junction rise above ambient on 50mm×50mm 2oz Cu |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics per JESD22-A108 |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin configuration with collector tab (pin 3) electrically connected to lead frame for enhanced thermal transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | E | Current return path; tied to ground or low-side reference in common-emitter switches |
| Pin 2 (Base) | B | Control input; requires ~200mA drive for full 2A saturation, compatible with MCU GPIO or driver IC outputs |
| Pin 3 (Collector) | C | Main power output node; thermally coupled to PCB copper via exposed metal tab for heat sinking |
| Pin 4 (Collector Tab) | C (same as Pin 3) | Electrically redundant collector connection; primary thermal interface to PCB heatsink area |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including temperature cycling, HTRB, and ESD testing |
| High hFE ≥ 400 @ 0.5A | Reduces base drive current requirement by >2× vs. standard 100–200 hFE transistors |
| VCEO/VCBO = 70V | Enables direct use in 48V systems without series voltage clamping or derating |
| SOT223 thermal RθJL = 12.9°C/W | Allows >2.3W dissipation via collector tab alone, simplifying heatsinking in space-constrained layouts |
| Lead-free & Halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive "Green" standards (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Relay Driver Circuit | DC-DC Converter Switch |
|---|---|
Use Scenario: Driving 12V/24V automotive relays with coil resistance 60–120Ω requiring 100–200mA hold current and 300–500mA pull-in surge. IC Role / Device Role / Timing Role: NPN switch operating in saturated mode to close relay coil path to ground. Use Value: Low VCE(sat) (≤500mV) ensures >98% coil voltage delivery and eliminates need for external flyback diode snubbing in many cases. | Use Scenario: High-side or low-side switch in non-isolated buck or boost converters delivering 1–3A output at 5–24V. IC Role / Device Role / Timing Role: Main power switch controlling energy transfer into inductor during PWM on-time. Use Value: 150MHz fT and 46ns ton support stable operation up to 500kHz switching frequency with minimal dead-time penalty. |
| Solenoid Actuator Control | Darlington Pair Replacement |
Use Scenario: Controlling 12V/24V fuel injector or HVAC damper solenoids drawing 1–1.8A peak current. IC Role / Device Role / Timing Role: Single-transistor switch replacing dual-stage Darlington to reduce component count and propagation delay. Use Value: 2A IC rating and 1440ns toff enable precise 1–10ms pulse-width actuation with <5% timing error due to tail current. | Use Scenario: Replacing legacy MJD127/MJD112 Darlington pairs in industrial motor starter modules. IC Role / Device Role / Timing Role: Standalone high-gain switch eliminating base resistor network and second transistor. Use Value: hFE ≥ 400 at 0.5A allows direct MCU GPIO drive without pre-driver, cutting BOM cost by ≥30% and board area by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2012ZTA | Lower VCEO (60V), higher hFE (min 600 @ 1A), SOT89 package | Limited to ≤48V systems; better for low-voltage, high-gain precision switching | Select when VCEO margin < 10V is acceptable and SOT89 footprint is preferred |
| MJD122G | Higher VCEO (100V), lower hFE (min 40 @ 1.5A), TO-220 package | Requires heatsink for >1A; suited for higher-voltage industrial AC/DC supplies | Select when >70V breakdown is mandatory and thermal mass outweighs SMT assembly constraints |
Compared with ZXTN2012ZTA and MJD122G, FZT692BQTA uniquely balances 70V rating, 2A current, high gain, and SOT223 thermal efficiency-making it optimal for AEC-Q101-compliant 12V/24V/48V automotive and industrial switching where board space, thermal density, and qualification are jointly critical.
Availability
FZT692BQTA is available at Aetrix Electronics and suitable for automotive relay drivers, DC-DC converter switches, solenoid actuators, and Darlington replacements requiring stable component supply and AEC-Q101 compliance.
Supply support for FZT692BQTA 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.
The FZT692BQTA belongs to Diodes' AEC-Q101-qualified power transistor product line, engineered specifically for robust, high-current switching in automotive body electronics and powertrain subsystems.
FAQ
Is FZT692BQTA pin-compatible with FZT692B?
Yes. FZT692BQTA and FZT692B share identical SOT223 (Type DN) pinout, mechanical dimensions, and electrical specifications. The "Q" suffix denotes AEC-Q101 qualification and PPAP capability; "TA" indicates tape-and-reel packaging (1,000 units/reel). No layout or schematic changes are required for migration.
What is the maximum safe operating current at 105°C ambient?
At TA = 105°C, derating begins at 3W PD. With RθJA = 41.7°C/W, allowable power drops to ~1.8W. Using VCE(sat) ≈ 0.45V at IC = 1.5A, max continuous IC is ~1.6A. For 2A operation at elevated ambient, increase copper area or add forced airflow per Diodes' AN-2001 thermal guidelines.
Can FZT692BQTA replace a Darlington pair like MPSA13 in a 24V relay driver?
Yes-FZT692BQTA's hFE ≥ 400 at 0.5A exceeds MPSA13's typical hFE of 10,000 but provides superior VCE(sat) (≤500mV vs. ~1.5V) and faster turn-off (1440ns vs. >10µs). It eliminates base resistor networks and reduces total power loss by >60%, though single-stage gain is lower than Darlington's cascaded β.
Does FZT692BQTA require a base resistor when driven by a 3.3V MCU GPIO?
Yes. To achieve 2A IC with hFE ≥ 400, minimum IB = 5mA is needed. With VBE(sat) ≈ 0.9V, a 470Ω resistor limits GPIO current to ~5.1mA at 3.3V. Lower values (e.g., 330Ω) improve saturation margin but increase MCU load; verify GPIO drive strength per microcontroller datasheet.
FZT692BQTA 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):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 70 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 50nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 500 @ 100mA, 2V
- Power - Max:
- 1.2 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
FZT692BQTA FAQ
1.How can I place an order for FZT692BQTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT692BQTA 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 FZT692BQTA reliable?
The price and inventory of FZT692BQTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT692BQTA is usually 5 days.
3.What payment methods are accepted for FZT692BQTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT692BQTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT692BQTA?
FZT692BQTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT692BQTA 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 FZT692BQTA?
For technical support, including FZT692BQTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT692BQTA requirements.
6.How does Aetrix verify that FZT692BQTA is sourced from the original manufacturer or authorized distributors?
All FZT692BQTA 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 FZT692BQTA meets industry standards.
7.What is the process for return or replacement of FZT692BQTA?
All FZT692BQTA units undergo pre-shipment inspection (PSI). If there is an issue with FZT692BQTA, 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 FZT692BQTA part is unused and in its original packaging.
Return procedure for FZT692BQTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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