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Diodes Incorporated DDTC144ECAQ-13-F
- Part No.:
- DDTC144ECAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC144ECAQ-13-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
DDTC144ECAQ-13-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = R2 = 47 kΩ, VCEO = 50 V, IC(max) = 100 mA, and DC current gain (hFE) ≥ 68 at IC = 5 mA, VCE = 5 V. It is AEC-Q101 qualified and used for level-shifting and digital switching in automotive body control modules.
For engineers reviewing the DDTC144ECAQ-13-F datasheet, DDTC144ECAQ-13-F pinout, DDTC144ECAQ-13-F application, or DDTC144ECAQ-13-F equivalent, key selection criteria include input resistor tolerance (±30%), saturation voltage (VCE(sat) ≤ 0.3 V at IC/IB = 10/0.5 mA), thermal resistance (RθJA = 625 °C/W), and automotive qualification status.
Technical Context
This device integrates two matched 47 kΩ bias resistors to configure a single-transistor inverter with fixed base drive, eliminating external components for digital logic interfacing. Its R1 = R2 topology ensures predictable turn-on threshold and stable switching behavior across temperature.
Designed for automotive-grade reliability, it operates from −55 °C to +150 °C, supports 50 V collector-emitter breakdown, and delivers 0.1–0.3 V output saturation under defined IC/IB conditions - enabling direct interface with 3.3 V and 5 V microcontroller GPIOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum allowable collector-to-emitter voltage before breakdown; enables use in 24 V automotive supply rails with margin. |
| IC(max) | 100 mA - Continuous collector current rating; supports driving small relays, LEDs, or logic inputs without external current limiting. |
| R1 = R2 | 47 kΩ ±30% - Matched internal base bias resistors; sets fixed current gain and eliminates need for discrete bias network. |
| hFE | ≥68 at IC = 5 mA, VCE = 5 V - Confirmed DC current gain ensures reliable saturation with standard MCU output drive capability. |
| VCE(sat) | ≤0.3 V at IC/IB = 10 mA/0.5 mA - Low saturation voltage minimizes power loss and heat generation in switching applications. |
| PD | 200 mW - Power dissipation limit on FR4 board with minimum pad layout; defines maximum continuous switching duty cycle at ambient temperature. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for current flow; connected to ground or low-side return path in common-emitter switch configuration. |
| 2 (Base) | Input node via R1–R2 divider | Internal connection point between two 47 kΩ resistors; accepts logic-level input to control transistor conduction. |
| 3 (Collector) | Output node | Switched high-side output; connects to load (e.g., LED anode or relay coil) referenced to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 47 kΩ matched resistors reduce BOM count and PCB area by eliminating two external resistors per switch node. |
| AEC-Q101 qualification | Validated for automotive applications including body electronics, lighting control, and sensor interface modules. |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant (Br+Cl <1500 ppm, Sb <1000 ppm), supporting environmental compliance programs. |
| SOT23 footprint compatibility | Standard 3-pin SOT23 outline enables drop-in replacement of discrete transistor + resistor combinations without layout change. |
Applications
| Automotive Door Module | LED Tail Light Driver |
|---|---|
Use Scenario: Controlling window lock/unlock solenoids and mirror actuator signals in OEM door control units. IC Role / Device Role / Timing Role: Digital switch translating 3.3 V microcontroller outputs to 12 V/24 V loads with current limiting and ESD protection. Use Value: Eliminates discrete base resistors and reduces component count per channel while maintaining AEC-Q101 reliability requirements. |
Use Scenario: Driving individual LED strings in rear combination lamps with PWM dimming support. IC Role / Device Role / Timing Role: Low-side switch enabling fast on/off transitions and precise current regulation via external series resistor. Use Value: VCE(sat) ≤ 0.3 V ensures minimal voltage drop and thermal rise during continuous operation at 20–30 mA per string. |
| Body Control Unit (BCU) | Smart Junction Box |
Use Scenario: Managing interior lighting, seat position memory, and HVAC fan control signals in centralized vehicle body controllers. IC Role / Device Role / Timing Role: Level-shifting interface between low-voltage MCU I/O and higher-voltage peripheral drivers. Use Value: Input voltage range (−10 V to +40 V) accommodates transients and reverse-battery protection circuitry without additional clamping diodes. |
Use Scenario: Replacing mechanical fuses with solid-state load switches in next-generation junction boxes for battery distribution. IC Role / Device Role / Timing Role: Pre-biased transistor used as discrete smart switch element in multi-channel protected power distribution ICs. Use Value: Matched R1/R2 tolerance (±30%) ensures consistent turn-on thresholds across channels, improving system-level current matching. |
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 |
|---|---|---|---|
| DDTC144ECA-7-F | Same die and R1=R2=47 kΩ, but packaged in 3,000-unit 7-inch reel; non-automotive marking (no 'Q' suffix). | Lacks AEC-Q101 documentation traceability and PPAP capability; not approved for new automotive designs. | Select only for cost-sensitive industrial or consumer applications where automotive qualification is unnecessary. |
| ADTC144ECAQ-13-F | Successor part with improved hFE (min 80 vs. 68) and tighter R1/R2 ratio tolerance (±20% vs. ±30%). | Identical pinout and package; validated for same automotive applications but with enhanced gain consistency and thermal stability. | Preferred for new designs requiring higher DC gain margin or tighter bias matching; backward compatible in most layouts. |
Compared with DDTC144ECAQ-13-F, the ADTC144ECAQ-13-F offers higher guaranteed hFE and tighter resistor matching, while the DDTC144ECA-7-F provides identical electrical performance without automotive traceability - making the original part optimal for production-critical automotive systems needing full PPAP support.
Availability
DDTC144ECAQ-13-F is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting systems, and smart junction box designs requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTC144ECAQ-13-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 computing markets.
This part belongs to the DDTC (R1 = R2 Series) CA family of pre-biased transistors, engineered specifically for simplified digital switching in space-constrained automotive electronics with zero external bias components.
FAQ
What is the maximum operating temperature for DDTC144ECAQ-13-F?
The device is rated for junction and storage temperatures from −55 °C to +150 °C. Its thermal resistance RθJA is 625 °C/W on FR4 with minimum recommended pad layout, meaning ambient temperature must stay below ~125 °C to maintain safe junction temperature under full 200 mW dissipation.
Does DDTC144ECAQ-13-F require external base resistors?
No. It integrates two matched 47 kΩ resistors (R1 = R2) internally - one from base to emitter and one from base to input - forming a complete bias network. This eliminates the need for external resistors in standard inverter or switch configurations.
How does the 'Q' suffix affect qualification status?
The 'Q' suffix indicates full AEC-Q101 qualification and PPAP capability. DDTC144ECAQ-13-F is approved for automotive production use with documented test reports and process controls, unlike non-'Q' variants such as DDTC144ECA-7-F.
Can DDTC144ECAQ-13-F replace a standard 2N3904 with external biasing?
Yes - when used as a saturated switch with logic-level input, its integrated 47 kΩ resistors provide appropriate base current for IC up to 30 mA. However, it is not a direct substitute for linear amplifier applications due to fixed bias and lower hFE variation control.
DDTC144ECAQ-13-F 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:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 47 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTC144ECAQ-13-F FAQ
1.How can I place an order for DDTC144ECAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144ECAQ-13-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 DDTC144ECAQ-13-F reliable?
The price and inventory of DDTC144ECAQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144ECAQ-13-F is usually 5 days.
3.What payment methods are accepted for DDTC144ECAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144ECAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144ECAQ-13-F?
DDTC144ECAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144ECAQ-13-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 DDTC144ECAQ-13-F?
For technical support, including DDTC144ECAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144ECAQ-13-F requirements.
6.How does Aetrix verify that DDTC144ECAQ-13-F is sourced from the original manufacturer or authorized distributors?
All DDTC144ECAQ-13-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 DDTC144ECAQ-13-F meets industry standards.
7.What is the process for return or replacement of DDTC144ECAQ-13-F?
All DDTC144ECAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144ECAQ-13-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 DDTC144ECAQ-13-F part is unused and in its original packaging.
Return procedure for DDTC144ECAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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