My Inquiry
My Account
Diodes Incorporated DDTC143FCA-7
- Part No.:
- DDTC143FCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC143FCA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDTC143FCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring built-in bias resistors R1 = 4.7 kΩ and R2 = 22 kΩ (R1 ≠ R2), DC current gain (hFE) of 68 at IC = 10 mA, VCE(sat) ≤ 0.3 V, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the DDTC143FCA-7 datasheet, DDTC143FCA-7 pinout, DDTC143FCA-7 application, or DDTC143FCA-7 equivalent, this device serves as a compact, RoHS-compliant digital switch or level translator in space-constrained control logic, LED driver biasing, and automotive body electronics where resistor-equipped transistors reduce PCB component count and improve assembly yield.
Technical Context
This device integrates an NPN transistor with two non-matching on-chip bias resistors (R1 = 4.7 kΩ, R2 = 22 kΩ), enabling direct TTL/CMOS-compatible input drive without external base resistors. It operates as a saturated switch with guaranteed VCE(sat) ≤ 0.3 V at IC/IB = 10.
The SOT23 package supports surface-mount reflow assembly, and its AEC-Q101 qualification confirms suitability for automotive ambient temperatures (−55°C to +150°C) and reliability requirements including PPAP capability and moisture sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 (Nominal) | 4.7 kΩ - sets input current limit for logic-level turn-on |
| R2 (Nominal) | 22 kΩ - provides active base pull-down to ensure fast, reliable turn-off |
| hFE (DC Current Gain) | 68 min @ IC = 10 mA - ensures sufficient drive margin for 5–20 mA load switching |
| VCE(sat) | ≤ 0.3 V @ IC/IB = 10 - minimizes conduction loss and self-heating in switching mode |
| VIN(ON) | 1.1 V @ IO = 3 mA - compatible with 1.8 V and 3.3 V logic families |
| PD | 200 mW - defines maximum continuous power handling on standard FR4 PCB |
| TJ Range | −55°C to +150°C - supports operation in under-hood automotive environments |
Pinout & Package
SOT23 plastic surface-mount package with matte tin-plated leads; UL 94V-0 rated, moisture sensitivity Level 1, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference / GND node | Common return path for bias network; tied to system ground in inverter configuration |
| 2 (Base) | Internal connection point between R1 and R2 | Not externally accessible; enables internal biasing without discrete resistor layout |
| 3 (Collector) | Switched output terminal | Drives loads (e.g., LEDs, relays, logic inputs) with low saturation voltage |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates need for two external base resistors, reducing BOM count and layout area |
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, humidity, and mechanical stress per JESD22 |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with global environmental directives |
| SOT23 footprint compatibility | Enables drop-in replacement for standard small-signal transistors without board redesign |
| Lead-free and RoHS-compliant | Fully compliant with EU Directive 2011/65/EU and J-STD-020 reflow profiles |
Applications
| Automotive Body Control Module | Industrial PLC Input Conditioning |
|---|---|
|
Use Scenario: Driving indicator LEDs and relay coils in door modules and lighting controllers. IC Role / Device Role / Timing Role: Digital switch translating microcontroller GPIO outputs to higher-current loads. Use Value: Built-in R1/R2 eliminates discrete bias resistors, reducing PCB area by ~1.5 mm² per channel and improving manufacturing repeatability. |
Use Scenario: Level-shifting 24 V sensor signals to 3.3 V MCU inputs in factory automation I/O cards. IC Role / Device Role / Timing Role: Active-low inverter with defined input threshold and guaranteed turn-off via R2. Use Value: VIN(OFF) ≤ 0.3 V ensures noise immunity against EMI in industrial environments; AEC-Q101 grade adds long-term reliability assurance. |
| Consumer Appliance Control Panel | Medical Diagnostic Equipment Interface |
|
Use Scenario: Enabling/disabling backlight segments and buzzer drivers in smart home appliances. IC Role / Device Role / Timing Role: Low-power digital switch operating from 3.3 V or 5 V supply rails. Use Value: 200 mW power dissipation and −55°C to +150°C rating support fanless enclosure designs with wide ambient variation. |
Use Scenario: Isolating microcontroller pins from external sensor interface circuits in portable diagnostic tools. IC Role / Device Role / Timing Role: Signal conditioning buffer preventing back-drive damage during hot-plug events. Use Value: Guaranteed VCE(sat) ≤ 0.3 V and IO(OFF) ≤ 0.5 μA minimize leakage and cross-talk in precision analog-adjacent digital paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pre-biased NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTC143XCA-7-F | R2 = 10 kΩ (vs. 22 kΩ); higher base current → faster turn-on but increased static input power | Better suited for high-speed switching (>100 kHz) where reduced propagation delay is critical | Select when driving capacitive loads or requiring tighter tON/tOFF symmetry |
| DDTC143ZCA-7-F | R2 = 47 kΩ (vs. 22 kΩ); lower base current → improved off-state leakage suppression | Preferred in battery-powered systems where standby current < 1 μA is mandatory | Select when minimizing quiescent current in always-on monitoring circuits is prioritized |
Compared with DDTC143XCA-7-F and DDTC143ZCA-7-F, the DDTC143FCA-7 strikes a design balance: its 22 kΩ R2 delivers robust turn-off while maintaining adequate speed and input drive efficiency for general-purpose automotive and industrial logic interfacing.
Availability
DDTC143FCA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance control panels requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTC143FCA-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, specializing in high-reliability components for automotive, industrial, and computing markets.
This part belongs to the DDTC (R1≠R2 Series) CA family-designed specifically for simplified digital switching in space- and cost-constrained applications where integrated biasing improves design robustness and reduces bill-of-materials complexity.
FAQ
What is the function of the internal R1 and R2 resistors in DDTC143FCA-7?
The internal R1 (4.7 kΩ) connects the input pin to the transistor base, limiting base current during turn-on; R2 (22 kΩ) connects base to emitter, ensuring rapid and complete turn-off by discharging base charge. This dual-resistor topology replaces external bias networks and guarantees predictable switching behavior across temperature and process variation.
Can DDTC143FCA-7 replace a standard NPN transistor like BC847 in existing designs?
Yes, but only if the circuit relies on external base resistors and does not require the exact VIN(ON)/VIN(OFF) thresholds or R1/R2 ratio of the DDTC143FCA-7. Direct substitution requires removing external bias resistors and verifying that the input logic levels meet the device's specified 1.1 V turn-on and ≤0.3 V turn-off thresholds.
Is DDTC143FCA-7 suitable for linear amplification applications?
No. This device is optimized for saturated switching operation-not linear amplification. Its R1/R2 network fixes the base bias point, and its datasheet specifies parameters (e.g., hFE, fT) only under switching conditions. For analog amplification, use a standard small-signal transistor without integrated bias resistors.
What does the "-7" suffix indicate in DDTC143FCA-7?
The "-7" denotes a 7-inch tape-and-reel packaging format containing 3,000 units per reel, with 8 mm tape width and AEC-Q101 compliance marking. It is distinct from "-13" (13-inch reel, 10,000 units) and "-F" (lead-free finish), both of which appear together as "-7-F" in the full orderable part number.
DDTC143FCA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
DDTC143FCA-7 FAQ
1.How can I place an order for DDTC143FCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC143FCA-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 DDTC143FCA-7 reliable?
The price and inventory of DDTC143FCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC143FCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC143FCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC143FCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC143FCA-7?
DDTC143FCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC143FCA-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 DDTC143FCA-7?
For technical support, including DDTC143FCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC143FCA-7 requirements.
6.How does Aetrix verify that DDTC143FCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC143FCA-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 DDTC143FCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC143FCA-7?
All DDTC143FCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC143FCA-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 DDTC143FCA-7 part is unused and in its original packaging.
Return procedure for DDTC143FCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC143FCA-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
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…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
