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Diodes Incorporated DDTA143FE-7-F
- Part No.:
- DDTA143FE-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-523
- Datasheet:
-
DDTA143FE-7-F.pdf
- Description:
- TRANS PREBIAS PNP 50V SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:2,119
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Product details
Overview
DDTA143FE-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT523 package, featuring built-in bias resistors R1 = 4.7 kΩ and R2 = 22 kΩ, −30 V maximum collector-emitter voltage, −100 mA continuous output current, and DC current gain (hFE) of 68 at −10 mA/−5 V. It is AEC-Q101 qualified for automotive signal switching applications.
For engineers reviewing the DDTA143FE-7-F datasheet, DDTA143FE-7-F pinout, DDTA143FE-7-F application, or DDTA143FE-7-F equivalent, this page delivers verified electrical parameters, terminal roles, automotive-grade reliability context, and real-world use cases in level-shifting, LED driver control, and logic interface circuits.
Technical Context
This device integrates a PNP bipolar transistor with asymmetric internal bias resistors (R1 ≠ R2), enabling direct digital logic-level drive without external base resistors. Its input voltage threshold (VIN(ON)) is −1.1 V at IO = −3 mA, and saturation voltage (VCE(SAT)) is ≤ −0.3 V under same conditions.
The SOT523 package supports high-density PCB layouts with thermal resistance RθJA = 833 °C/W on FR4, and the device operates across −55 °C to +150 °C, meeting automotive ambient requirements. Gain-bandwidth product fT is 250 MHz, confirming suitability for low-speed switching-not RF amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 Resistor | 4.7 kΩ ±30% - sets base current limit for predictable turn-on behavior with standard logic outputs |
| R2 Resistor | 22 kΩ ±30% - provides active pull-down path to ensure fast, reliable turn-off and prevent floating base |
| VCEO | −30 V - supports operation in 24 V automotive supply rails with margin against transients |
| IC(MAX) | −100 mA - drives medium-current loads such as indicator LEDs or small relays directly |
| hFE | 68 at −10 mA / −5 V - ensures stable current amplification in saturated switch mode |
| VCE(SAT) | ≤ −0.3 V at −3 mA - minimizes power loss and heating during conduction |
| PD | 150 mW - defines maximum steady-state dissipation on standard FR4 layout |
Pinout & Package
Package: SOT523 - ultra-small surface-mount plastic case (1.60 mm × 1.60 mm × 0.75 mm), halogen- and antimony-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter connection | Common reference node; tied to system ground or negative rail in high-side switch configurations |
| 2 (Base) | Input control node | Internally connected to R1 and R2 junction; accepts logic-level input without external resistor network |
| 3 (Collector) | Output current path | Switched load connection; sinks current when enabled, compatible with open-collector logic interfaces |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates two external resistors, reducing BOM count and PCB area in discrete logic interface designs |
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, and mechanical stress-enables use in engine control and body electronics |
| SOT523 footprint | 0.002 g weight and 1.6 mm × 1.6 mm outline support space-constrained modules like sensor nodes and infotainment peripherals |
| −55 °C to +150 °C operation | Meets extended temperature range requirements for under-hood and powertrain applications without derating |
Applications
| Automotive Door Module | Industrial PLC Input Stage |
|---|---|
|
Use Scenario: Level-shifting 3.3 V microcontroller GPIO to control 12 V solenoid drivers in door lock actuation circuitry. IC Role / Device Role: High-side PNP switch providing inverted logic interface with integrated biasing. Use Value: Eliminates need for dual-resistor network while maintaining <−0.3 V saturation voltage to minimize heat in sealed module enclosures. |
Use Scenario: Converting 24 V industrial field signals into 5 V logic-compatible inputs for FPGA-based controller cards. IC Role / Device Role: Input conditioning transistor acting as voltage translator and current limiter. Use Value: R1/R2 ratio ensures consistent turn-on at −1.1 V input, enabling reliable detection of noisy 24 V signals down to −10 V common-mode swing. |
| LED Status Indicator Driver | USB-C Port Power Switch Control |
|
Use Scenario: Driving red/green status LEDs on embedded medical device front panels with 3.3 V MCU outputs. IC Role / Device Role: Low-current PNP switch sinking up to 20 mA per LED segment. Use Value: VCE(SAT) ≤ −0.3 V ensures >95% efficiency at 20 mA, reducing thermal load in compact plastic housings. |
Use Scenario: Enabling/disabling VBUS power path in USB-C receptacle circuits using USB PD controller GPIOs. IC Role / Device Role: Gate enable switch for external N-channel MOSFET controlling 5 V/3 A power delivery. Use Value: −30 V VCEO rating accommodates USB-C VBUS overshoot events; AEC-Q101 grade adds robustness for portable equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTA143ZE-7-F | R2 = 47 kΩ (vs. 22 kΩ); higher input impedance, slower turn-off | Better suited for low-power standby circuits where leakage must be minimized | Select when lower quiescent current (<−0.5 µA) and reduced base drive demand are prioritized over switching speed |
| DDTC143EE-7-F | NPN complement; identical R1/R2 values but opposite polarity and pinout (Emitter/Collector swapped) | Used in low-side switching topologies requiring sourcing from ground rather than sinking to rail | Choose for designs already using NPN logic interfaces or where board layout favors emitter-grounded configuration |
Compared with DDTA143ZE-7-F and DDTC143EE-7-F, the DDTA143FE-7-F offers optimal balance of turn-on sensitivity (−1.1 V), moderate R2 value for fast discharge, and AEC-Q101 compliance-making it preferred for automotive signal switching where both speed and reliability matter.
Availability
DDTA143FE-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, and USB-C power management circuits requiring stable component supply, AEC-Q101 qualification, and SOT523 space efficiency.
Supply support for DDTA143FE-7-F 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 consumer markets since 1960.
The DDTA series targets cost-sensitive, space-constrained signal switching applications-designed specifically to replace discrete transistor + resistor combinations in automotive and industrial control systems.
FAQ
What is the maximum operating temperature for DDTA143FE-7-F?
The DDTA143FE-7-F is rated for operation from −55 °C to +150 °C, validated per AEC-Q101 thermal cycling and high-temperature reverse bias tests. This enables use in under-hood automotive environments and industrial enclosures without thermal derating up to 150 °C junction temperature.
Can DDTA143FE-7-F replace a standard PNP transistor with external base resistors?
Yes-it replaces a discrete PNP transistor plus two base resistors (R1 and R2) in one SOT523 package. Its internal 4.7 kΩ and 22 kΩ resistors provide defined biasing, eliminating layout uncertainty and improving production consistency in logic-level interface circuits.
Is DDTA143FE-7-F pin-compatible with other DDTA-series transistors?
Yes-all DDTA (R1≠R2) devices share identical SOT523 pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. This allows drop-in substitution within the series when R1/R2 values match design requirements, simplifying variant management.
Does DDTA143FE-7-F support 1.8 V logic input drive?
No-its VIN(ON) is −1.1 V at IO = −3 mA, meaning it requires ≥1.1 V magnitude negative input swing relative to emitter. A 1.8 V positive logic signal referenced to ground cannot directly drive it; level-shifting or inversion is required for compatibility.
DDTA143FE-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- 22 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 68 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 150 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
DDTA143FE-7-F FAQ
1.How can I place an order for DDTA143FE-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA143FE-7-F 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 DDTA143FE-7-F reliable?
The price and inventory of DDTA143FE-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA143FE-7-F is usually 5 days.
3.What payment methods are accepted for DDTA143FE-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA143FE-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA143FE-7-F?
DDTA143FE-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA143FE-7-F 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 DDTA143FE-7-F?
For technical support, including DDTA143FE-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA143FE-7-F requirements.
6.How does Aetrix verify that DDTA143FE-7-F is sourced from the original manufacturer or authorized distributors?
All DDTA143FE-7-F 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 DDTA143FE-7-F meets industry standards.
7.What is the process for return or replacement of DDTA143FE-7-F?
All DDTA143FE-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA143FE-7-F, 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 DDTA143FE-7-F part is unused and in its original packaging.
Return procedure for DDTA143FE-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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