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Diodes Incorporated FZT694BTC
- Part No.:
- FZT694BTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT694BTC.pdf
- Description:
- TRANS NPN 120V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,520
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Product details
Overview
FZT694BTC from Diodes Incorporated is a 120V NPN medium-power high-gain bipolar junction transistor in SOT223 package, rated for 1A continuous collector current, with hFE > 400 at 200mA and VCE(sat) ≤ 500mV at 400mA/5mA drive, used in relay/solenoid drivers and Darlington pair stages.
For engineers reviewing the FZT694BTC datasheet, FZT694BTC pinout, FZT694BTC application, or FZT694BTC equivalent, key selection criteria include breakdown voltage margin (BVCEO = 120V), thermal resistance (RθJA = 41.7°C/W on 50mm × 50mm 2oz copper), saturation performance at 1A, and complementary PNP pairing with FZT795A.
Technical Context
This NPN transistor supports high-voltage switching up to 120V with low leakage (ICBO, ICES, IEBO ≤ 100nA at rated voltages) and delivers fT = 130MHz for moderate-frequency amplification or switching. Its gain profile remains stable across 100–400mA collector currents.
The device uses a planar epitaxial structure with "Green" halogen- and antimony-free molding compound (UL 94V-0), operates from −55°C to +150°C, and meets JEDEC JESD22-A114 HBM ESD rating of 4kV - suitable for industrial control environments with transient immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 120 V - Enables direct interface with 100V DC bus or 85V AC-derived supplies without external clamping. |
| IC (cont.) | 1 A - Supports solenoid loads up to ~12W at 12V or relay coils drawing ≤1A steady-state current. |
| hFE | 400 min @ 200mA - Reduces required base drive current to ≤0.5mA for 200mA collector output, easing MCU GPIO sourcing. |
| VCE(sat) | 500 mV max @ 400mA/5mA - Limits conduction loss to <200mW, minimizing self-heating in compact SOT223 layouts. |
| RθJA | 41.7 °C/W - Requires ≥50mm × 50mm 2oz copper pad for full 3W dissipation at TA = 25°C ambient. |
| fT | 130 MHz - Supports linear amplification or PWM switching up to ~10MHz with acceptable gain roll-off. |
| ESD HBM | 4,000 V - Allows handling without special ESD precautions during board assembly in non-classified environments. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin configuration with emitter tab (pin 3) electrically connected to collector (pin 2) internally - requires isolation of collector pad from ground plane when used in common-emitter topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Base) | Control input | Accepts TTL/CMOS-compatible drive; 0.9V VBE(on) at 1A enables direct microcontroller interfacing. |
| Pin 2 (Collector) | High-side switched node | Rated for 120V reverse bias; bonded to large copper tab for thermal conduction and power dissipation. |
| Pin 3 (Emitter) | Current return path | Internally tied to collector tab; must be routed to system ground or load return with low-inductance trace. |
| Pin 4 (Collector Tab) | Thermal & electrical connection | Electrically identical to Pin 2; soldered to PCB copper pour for thermal management and current capacity. |
Key Features
| Feature | Design Value |
|---|---|
| High BVCEO/BVCBO | 120V rating allows operation across 100V industrial rails without snubbers or derating. |
| Low VCE(sat) | ≤500mV at 400mA reduces power loss by >40% versus standard general-purpose transistors. |
| High hFE | Min 400 at 200mA enables single-stage switching without Darlington stacking or base resistors >1kΩ. |
| Lead-free & Green | RoHS 3 compliant, halogen- and antimony-free compound meets automotive and industrial environmental mandates. |
| Robust thermal design | RθJL = 12.9°C/W enables efficient heat transfer from die to PCB via collector tab solder joint. |
Applications
| Industrial Relay Driver | Darlington Pair Input Stage |
|---|---|
Use Scenario: Driving 24V/48V industrial relays with coil resistance 100–500Ω in PLC output modules. IC Role / Device Role / Timing Role: High-voltage NPN switch controlling relay coil current path with fast turn-on (ton = 80ns) and controlled turn-off (toff = 2.9µs). Use Value: Eliminates need for flyback diode buffering due to 120V VCEO margin, reducing BOM count and board area. |
Use Scenario: First-stage amplifier in high-gain Darlington configurations for precision current sensing or analog front-ends. IC Role / Device Role / Timing Role: Provides initial current gain (hFE ≥ 400) before second-stage transistor, lowering total base drive requirement. Use Value: Enables <10µA total base current for 1A output, improving efficiency and reducing MCU GPIO loading. |
| Solenoid Actuator Control | High-Voltage DC Load Switch |
Use Scenario: Controlling 12–48V solenoids in HVAC dampers, fluid valves, or access control locks. IC Role / Device Role / Timing Role: Medium-power switching element handling 0.5–1A pulsed loads with low saturation loss and thermal stability. Use Value: Maintains <500mV VCE(sat) across temperature range, ensuring consistent solenoid pull-in voltage under varying ambient conditions. |
Use Scenario: Isolating 100V DC distribution lines in test equipment or programmable power supplies. IC Role / Device Role / Timing Role: High-breakdown NPN used in emitter-follower or common-emitter configuration for regulated high-side switching. Use Value: Withstands 120V VCBO, enabling safe operation with 10% overvoltage margin on nominal 100V bus systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2012E6TA | Lower VCEO = 100V; higher hFE = 600 min; SOT23-3 package (no thermal tab) | Limited to ≤85V systems; unsuitable for 100V+ bus isolation or high-power solenoid loads | Select only when board space is critical and voltage stress stays below 90V. |
| MJD127G | Higher IC = 2A; TO-220 package; VCEO = 100V; hFE = 30–250 (wide spread) | Requires heatsink for >1W dissipation; gain variation complicates consistent base drive design | Prefer for higher-current loads where thermal mass and mechanical mounting outweigh SMT advantages. |
Compared with ZXTN2012E6TA and MJD127G, FZT694BTC uniquely balances 120V robustness, SOT223 thermal performance, and tight hFE distribution - making it optimal for space-constrained industrial controls needing reliable 1A switching at elevated voltages.
Availability
FZT694BTC is available at Aetrix Electronics and suitable for industrial relay drivers, solenoid actuators, and Darlington input stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for FZT694BTC 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.
FZT694BTC belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for industrial automation, power management, and electromechanical control applications demanding reliability at elevated voltage and temperature.
FAQ
What is the maximum continuous collector current for FZT694BTC?
The FZT694BTC is rated for 1A continuous collector current at TA = 25°C with proper PCB thermal management (50mm × 50mm 2oz copper). Derating applies above 25°C ambient - e.g., 0.8A at 70°C ambient per the published thermal curve. Peak pulse current is 2A for short durations (≤300µs, duty cycle ≤2%).
Is FZT694BTC pin-compatible with other SOT223 NPN transistors?
No - FZT694BTC has a unique 4-pin SOT223 (Type DN) configuration where pin 3 (emitter) is internally connected to the collector tab (pin 2 and thermal pad), unlike standard 3-pin SOT223 variants. This requires specific PCB layout with isolated emitter routing and collector-tab grounding strategy.
Does FZT694BTC meet AEC-Q101 qualification for automotive use?
FZT694BTC itself is not AEC-Q101 qualified per the datasheet; however, Diodes offers an automotive-grade variant (FZT694BQ) with PPAP capability, manufactured in IATF 16949-certified facilities. Customers requiring automotive qualification must specify the Q-suffix part number and engage Diodes' automotive team for change control documentation.
What is the recommended minimum pad layout for thermal performance?
The datasheet specifies a minimum suggested pad layout (C = 2.30mm, C1 = 6.40mm, X1 = 3.30mm, Y2 = 8.00mm) for the SOT223 (Type DN) package. For full 3W dissipation, Diodes recommends a 50mm × 50mm 2oz copper area connected directly to the collector tab - smaller pads reduce power handling to 1.2W (minimum pad) or 1.6W (25mm × 25mm 1oz copper).
FZT694BTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 120 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 5mA, 400mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 150 @ 400mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 130MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT694BTC FAQ
1.How can I place an order for FZT694BTC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT694BTC 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 FZT694BTC reliable?
The price and inventory of FZT694BTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT694BTC is usually 5 days.
3.What payment methods are accepted for FZT694BTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT694BTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT694BTC?
FZT694BTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT694BTC 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 FZT694BTC?
For technical support, including FZT694BTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT694BTC requirements.
6.How does Aetrix verify that FZT694BTC is sourced from the original manufacturer or authorized distributors?
All FZT694BTC 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 FZT694BTC meets industry standards.
7.What is the process for return or replacement of FZT694BTC?
All FZT694BTC units undergo pre-shipment inspection (PSI). If there is an issue with FZT694BTC, 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 FZT694BTC part is unused and in its original packaging.
Return procedure for FZT694BTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT694BTC Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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