My Inquiry
My Account
Diodes Incorporated DDTA143ECA-7
- Part No.:
- DDTA143ECA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTA143ECA-7.pdf
- Description:
- TRANS PREBIAS PNP 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,424
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDTA143ECA-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT23 package with integrated bias resistors R1 = R2 = 4.7 kΩ, −50 V VCEO, −100 mA IC(max), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the DDTA143ECA-7 datasheet, DDTA143ECA-7 pinout, DDTA143ECA-7 application, or DDTA143ECA-7 equivalent, key selection factors include input voltage range (−30 V to +10 V), guaranteed DC current gain (GL = 20 min at −10 mA), output saturation voltage (VCE(sat) ≤ −0.3 V), thermal resistance (625 °C/W), and RoHS-compliant green packaging.
Technical Context
This device implements a single PNP bipolar junction transistor with monolithically integrated base-emitter and base-collector bias resistors (R1 = R2 = 4.7 kΩ), enabling direct logic-level interface without external biasing. It operates as an inverting switch with guaranteed turn-on at VIN ≤ −1.9 V (typ) and turn-off at VIN ≥ −0.5 V (min).
The SOT23 package supports surface-mount assembly on FR-4 PCBs with minimum pad layout, delivering 200 mW power dissipation and 625 °C/W junction-to-ambient thermal resistance. Its −55 °C to +150 °C operating temperature range and AEC-Q101 qualification confirm suitability for under-hood automotive control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - Maximum collector-emitter voltage before breakdown; defines safe switching range in negative-rail circuits. |
| IC(max) | −100 mA - Continuous collector current limit; sets maximum load drive capability in low-power switching. |
| R1 / R2 | 4.7 kΩ ±30% - Matched internal bias resistors enable stable logic-compatible switching without external components. |
| GL | 20 (min) - DC current gain at VCE = −5 V, IC = −20 mA; ensures reliable saturation under defined load conditions. |
| VCE(sat) | ≤ −0.3 V @ IC = −20 mA, IB = −0.5 mA - Low saturation voltage minimizes conduction loss in high-efficiency switching. |
| PD | 200 mW - Power dissipation limit on standard FR-4 board; determines thermal derating requirements above +25 °C. |
| TJ/TSTG | −55 °C to +150 °C - Extended temperature range enables use in engine control units and industrial sensors. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3 terminals, 0.008 g weight, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Emitter terminal; connected internally to R2 and external circuit return path; polarity defines PNP operation. |
| 2 (Base) | B | Base terminal; tied to midpoint of R1–R2 divider; accepts logic-level input for controlled switching. |
| 3 (Collector) | C | Collector terminal; delivers switched output current to load; rated for −50 V and −100 mA continuous. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 4.7 kΩ matched resistors eliminate need for external bias components and reduce PCB footprint by >30%. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standards. |
| Green, halogen-free construction | Meets RoHS 3 (2015/863/EU) with <900 ppm Br, <900 ppm Cl, and <1000 ppm Sb; supports eco-compliant manufacturing. |
| SOT23 mechanical compatibility | Standardized footprint enables drop-in replacement with other SOT23 transistors and simplifies reflow process control. |
Applications
| Automotive Door Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Driving LED status indicators and small solenoids in door latch assemblies. IC Role / Device Role / Timing Role: PNP switch controlling 12 V loads with logic-level MCU GPIO input. Use Value: Integrated 4.7 kΩ bias resistors reduce component count and ensure consistent turn-on at −1.9 V, eliminating external resistor matching. | Use Scenario: Level-shifting and isolation between 3.3 V microcontrollers and 24 V field sensors. IC Role / Device Role / Timing Role: Inverting logic buffer with rail-to-rail input tolerance (−30 V to +10 V). Use Value: Guaranteed VIN(off) ≤ −0.5 V prevents false triggering from noise, while VCE(sat) ≤ −0.3 V maintains low power loss at 20 mA. |
| Consumer Appliance Control | Medical Diagnostic Equipment |
Use Scenario: Controlling relay coils and buzzer drivers in washing machine control boards. IC Role / Device Role / Timing Role: High-reliability discrete switch replacing legacy BJT + resistor combinations. Use Value: AEC-Q101 qualification ensures long-term stability across thermal cycles (−40 °C to +85 °C ambient), reducing field failure risk. | Use Scenario: Isolating microcontroller outputs from analog front-end power sequencing circuits. IC Role / Device Role / Timing Role: Safe, low-leakage switch with IO(off) ≤ −0.5 µA at −50 V VCE. Use Value: Ultra-low off-state leakage preserves signal integrity in precision diagnostic signal paths where stray current must be minimized. |
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 |
|---|---|---|---|
| DDTA143EKA-7 | Same die, different marking code (P08 → P09); identical R1/R2 = 4.7 kΩ, VCEO, IC, and AEC-Q101 qualification. | No functional difference; used interchangeably in same designs. | Select when P09-marked reels are preferred for traceability or inventory alignment. |
| NSVDDTA143ECA-7 | Automotive-grade variant with enhanced PPAP documentation support; otherwise electrically identical to DDTA143ECA-7. | Required for Tier-1 automotive programs needing full PPAP submission packages. | Choose for new automotive designs requiring formal PPAP compliance beyond baseline AEC-Q101. |
Compared with DDTA143ECA-7, DDTA143EKA-7 offers identical electrical performance with alternate top-side marking, while NSVDDTA143ECA-7 adds PPAP-ready documentation-both retain the same 4.7 kΩ bias network, −50 V rating, and SOT23 footprint for seamless integration.
Availability
DDTA143ECA-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, and consumer appliance control systems requiring stable component supply and AEC-Q101 reliability assurance.
Supply support for DDTA143ECA-7 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 DDTA series belongs to Diodes' pre-biased transistor product line, engineered specifically for space-constrained, high-reliability switching applications in automotive and industrial environments where simplified biasing and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum allowable input voltage for DDTA143ECA-7?
The absolute maximum input voltage (pin 1 to pin 2) is −30 V, as specified in the Absolute Maximum Ratings table. Operation beyond this value risks permanent damage to the internal bias resistors and transistor junction. For reliable switching, VIN should remain within −1.9 V (on) to −0.5 V (off) under typical load conditions.
Does DDTA143ECA-7 require external bias resistors?
No. DDTA143ECA-7 integrates matched 4.7 kΩ base-emitter (R1) and base-collector (R2) resistors, enabling direct connection to logic outputs without external components. This eliminates resistor matching tolerances and reduces PCB area versus discrete BJT + resistor solutions.
Is DDTA143ECA-7 suitable for 24 V industrial control applications?
Yes. With a −50 V VCEO rating and −100 mA IC capability, DDTA143ECA-7 safely switches 24 V loads when used with appropriate current-limiting or flyback protection. Its −55 °C to +150 °C operating range and AEC-Q101 qualification further validate robustness in harsh industrial environments.
How does the thermal performance of DDTA143ECA-7 compare to standard SOT23 transistors?
DDTA143ECA-7 has a junction-to-ambient thermal resistance of 625 °C/W on FR-4 with minimum pad layout-identical to standard SOT23 discrete transistors. Its 200 mW power dissipation limit is governed by package geometry and PCB copper area, not the integrated resistors, which contribute negligible additional heat under normal bias conditions.
DDTA143ECA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 4.7 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTA143ECA-7 FAQ
1.How can I place an order for DDTA143ECA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA143ECA-7 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 DDTA143ECA-7 reliable?
The price and inventory of DDTA143ECA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA143ECA-7 is usually 5 days.
3.What payment methods are accepted for DDTA143ECA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA143ECA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA143ECA-7?
DDTA143ECA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA143ECA-7 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 DDTA143ECA-7?
For technical support, including DDTA143ECA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA143ECA-7 requirements.
6.How does Aetrix verify that DDTA143ECA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA143ECA-7 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 DDTA143ECA-7 meets industry standards.
7.What is the process for return or replacement of DDTA143ECA-7?
All DDTA143ECA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA143ECA-7, 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 DDTA143ECA-7 part is unused and in its original packaging.
Return procedure for DDTA143ECA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTA143ECA-7 Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
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…
