My Inquiry
My Account
Diodes Incorporated ZDT694QTA
- Part No.:
- ZDT694QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- SOT-223-8
- Datasheet:
-
ZDT694QTA.pdf
- Description:
- TRANS 2NPN DUAL 120V 500MA SM8
- Quantity:
- Payment:
- Shipping:
Inventory:6,842
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZDT694QTA from Diodes Incorporated is a dual NPN medium-power high-gain transistor in SM-8 (SOT-223-8) package, rated for 120V VCEO, 0.5A continuous collector current, and minimum hFE of 400 at 200mA. It is AEC-Q101 qualified, RoHS-compliant, and designed for automotive power switching in engine control modules and body electronics.
For engineers reviewing the ZDT694QTA datasheet, ZDT694QTA pinout, ZDT694QTA application, or ZDT694QTA equivalent, key selection criteria include its dual-die layout, 2.25W single-die power dissipation, 55.6°C/W RθJA, and 130MHz fT - all critical for high-voltage discrete driver stages requiring thermal robustness and gain stability.
Technical Context
This dual NPN transistor integrates two electrically isolated silicon die in a single SM-8 thermally enhanced leadframe package. Each die supports independent operation with identical absolute maximum ratings: 120V VCEO, 0.5A IC, and 2.25W PD (single-die), enabling redundant or parallel configurations without cross-coupling.
Its high DC current gain (hFE ≥ 400 @ IC = 200mA, VCE = 2V) and low VCE(sat) (≤ 0.25V @ IC = 0.1A, IB = 0.5mA) support efficient low-side switching in 12V/24V automotive systems where base drive efficiency and thermal margin are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 120 V - Enables use in 42V automotive systems and industrial 24–48V DC rails without derating. |
| IC (continuous) | 0.5 A per die - Supports driving solenoids, relays, and small motors directly from microcontroller GPIOs via base resistors. |
| hFE | ≥ 400 @ 200mA - Reduces required base drive current, easing MCU output stage loading and PCB trace losses. |
| VCE(sat) | ≤ 0.25 V @ 0.1A - Limits conduction loss to <25mW per die, critical for thermally constrained modules. |
| fT | 130 MHz - Supports fast switching (>100kHz PWM) in DC-DC pre-regulators and LED dimming drivers. |
| RθJA | 55.6 °C/W - Requires ≥25 mm × 25 mm 2 oz copper pad for full 2.25W dissipation at +25°C ambient. |
| ESD HBM | 4000 V - Meets IEC 61000-4-2 Level 3 immunity requirements for in-vehicle assembly handling. |
Pinout & Package
Package: SM-8 (8-lead SOT-223 variant), molded plastic with UL 94V-0 rating, matte tin-plated leads, 0.117 g weight. Thermally optimized for PCB heat spreading via exposed collector leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Collector (Die 1) | Internally paralleled pins for low-inductance, high-current collector connection; soldered to thermal pad. |
| 5, 6 | Base (Die 1) | Separate base terminals allow independent biasing or gate drive isolation for each transistor. |
| 7, 8 | Emiter (Die 1) | Emitter pins tied internally; used for current sensing or Kelvin connection in precision applications. |
| - | Dual-die symmetry | Second die shares identical pin mapping (pins 1–8 duplicated functionally); no shared terminals between dies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood environments (-40°C to +150°C junction, 1000h HTOL, ESD robustness). |
| High gain stability | hFE ≥ 400 maintained across IC = 150–400mA range, reducing gain-dependent timing drift in analog feedback loops. |
| Thermal resistance optimization | RθJL = 30.7°C/W enables direct heat transfer to PCB copper, supporting >2W pulsed operation with minimal heatsink area. |
| Green compound | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets automotive OEM environmental mandates. |
Applications
| Engine Control Unit (ECU) Injector Driver | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Driving 12V fuel injector coils with PWM-controlled dwell time in gasoline direct injection systems. IC Role / Device Role / Timing Role: Dual NPN switch providing low-saturation, high-voltage flyback clamping and precise current sinking during coil de-energization. Use Value: 0.25V VCE(sat) minimizes power loss during 5A peak coil current, while 120V rating ensures safe flyback voltage handling without external snubbers. | Use Scenario: Controlling door lock actuators, window lift motors, and mirror adjustment circuits in centralized BCM designs. IC Role / Device Role / Timing Role: Discrete high-side or low-side driver replacing integrated load switches where fault tolerance and thermal separation are required. Use Value: Dual-die isolation prevents single-point failure; each die handles independent loads up to 0.5A, enabling modular board-level redundancy. |
| Industrial 24V PLC Output Stage | LED Headlamp Dimming Driver |
Use Scenario: Solid-state relay replacement in programmable logic controller (PLC) digital output modules operating from 24V DC rails. IC Role / Device Role / Timing Role: Medium-power switching element interfacing microcontroller outputs to inductive field devices (valves, contactors). Use Value: 2.25W single-die dissipation supports continuous 0.5A loads without forced air, simplifying enclosure design and lowering system BOM cost. | Use Scenario: Analog/digital dimming control of high-brightness LED strings in adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: Linear or PWM-controlled current sink regulating LED current up to 400mA per channel. Use Value: High hFE and low VBE(sat) enable accurate current regulation with <1% error over temperature, meeting UNECE R149 photometric stability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN6702E6TA | Single-die SOT-23-6, 80V VCEO, 1.5A IC, hFE = 300 min - lower voltage rating, higher current, smaller package. | Not AEC-Q101 qualified; unsuitable for automotive underhood use but viable for consumer 24V industrial controls. | Select when space-constrained PCBs require single-transistor footprint and 80V rating suffices. |
| DMT6940LSDQ | Dual N-channel MOSFET in SO-8, 40V VDS, 6.5A ID, RDS(on) = 28mΩ - voltage-limited, lower on-resistance, gate-driven only. | Requires level-shifted gate drive; lacks bipolar simplicity for direct MCU interface; not suitable for linear regulation. | Prefer for high-efficiency, high-frequency switching where gate drive circuitry exists and voltage ≤40V. |
Compared with ZXTN6702E6TA and DMT6940LSDQ, ZDT694QTA uniquely delivers AEC-Q101 compliance, 120V blocking, and dual-die bipolar architecture - making it the only choice for thermally demanding, safety-critical automotive switching where gain-stable linear operation and fault-isolated redundancy are mandatory.
Availability
ZDT694QTA is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and industrial 24V PLC output stages requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 traceability.
Supply support for ZDT694QTA 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.
The ZDT694QTA belongs to Diodes' automotive-qualified bipolar transistor product line, engineered specifically for high-reliability 12V/24V/42V vehicle subsystems requiring extended temperature operation, ESD resilience, and PPAP documentation support.
FAQ
What is the thermal pad connection requirement for ZDT694QTA?
The SM-8 package exposes collector leads (pins 1–4) as a thermal pad. These must be soldered to a ≥25 mm × 25 mm 2 oz copper area on the PCB to achieve the specified 55.6°C/W RθJA. No internal thermal slug exists - heat transfer occurs solely through the leadframe-to-copper interface.
Can both transistors in ZDT694QTA share one base resistor?
No. Pins 5–6 and pins 7–8 are separate base and emitter terminals for each die. Sharing a base resistor causes unbalanced current division and thermal runaway. Each transistor requires independent base biasing to maintain gain matching and thermal stability.
Is ZDT694QTA suitable for linear regulator applications?
Yes - its high hFE (≥400), low VCE(sat) (≤0.25V), and 120V VCEO support series-pass operation in 24V–48V input linear regulators delivering up to 0.5A per channel, provided thermal design accommodates 2.25W dissipation per die at full load.
Does ZDT694QTA have built-in ESD protection diodes?
No. The device relies on its inherent junction structure for ESD robustness (4kV HBM). External TVS diodes or RC filters are required on collector/base lines in systems exposed to ISO 10605 or IEC 61000-4-2 surge events exceeding 4kV contact discharge.
ZDT694QTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-223-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 NPN (Dual)
- Current - Collector (Ic) (Max):
- 500mA
- Voltage - Collector Emitter Breakdown (Max):
- 120V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 5mA, 400mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 500 @ 150mA, 2V
- Power - Max:
- 2.25W
- Frequency - Transition:
- 130MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SM8
ZDT694QTA FAQ
1.How can I place an order for ZDT694QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZDT694QTA 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 ZDT694QTA reliable?
The price and inventory of ZDT694QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZDT694QTA is usually 5 days.
3.What payment methods are accepted for ZDT694QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZDT694QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZDT694QTA?
ZDT694QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZDT694QTA 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 ZDT694QTA?
For technical support, including ZDT694QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZDT694QTA requirements.
6.How does Aetrix verify that ZDT694QTA is sourced from the original manufacturer or authorized distributors?
All ZDT694QTA 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 ZDT694QTA meets industry standards.
7.What is the process for return or replacement of ZDT694QTA?
All ZDT694QTA units undergo pre-shipment inspection (PSI). If there is an issue with ZDT694QTA, 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 ZDT694QTA part is unused and in its original packaging.
Return procedure for ZDT694QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZDT694QTA Tags
-
MBT3946DW1T1G
onsemi
-
BC846BPDW1T1G
onsemi
-
MBT2222ADW1T1G
onsemi
-
BC847BDW1T1G
onsemi
-
DMMT5401-7-F
Diodes Incorporated
-
DMMT5551-7-F
Diodes Incorporated
-
DMMT3904W-7-F
Diodes Incorporated
-
DMMT3906W-7-F
Diodes Incorporated
-
FMB3904
onsemi
-
FMB2222A
onsemi
-
ULQ2003D1013TR
STMicroelectronics
-
ZXTD4591E6TA
Diodes Incorporated
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…
