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Diodes Incorporated DDTD143TC-7-F
- Part No.:
- DDTD143TC-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTD143TC-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,604
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Product details
Overview
DDTD143TC-7-F from Diodes Incorporated is an NPN pre-biased digital transistor in SOT23 package, featuring built-in 4.7kΩ R1 and open-circuit R2 bias resistors, 5V maximum emitter-base breakdown voltage (BVEBO), 500mA continuous collector current (IC), and 250mW power dissipation - used for level-shifting and low-side switching in automotive body control modules and industrial I/O interfaces.
For engineers reviewing the DDTD143TC-7-F datasheet, DDTD143TC-7-F pinout, DDTD143TC-7-F application, or DDTD143TC-7-F equivalent, key selection criteria include verified BVEBO = 5V, hFE = 100–600 at IC = 5mA, VCE(sat) ≤ 0.3V at IC/IB = 50mA/2.5mA, and SOT23 thermal resistance RθJA = 500°C/W on FR4 board.
Technical Context
This device integrates a single NPN silicon epitaxial planar transistor with monolithically embedded base biasing network (R1 only, R2 open), enabling direct logic-level drive without external resistors. It operates as a saturated switch with guaranteed DC current gain (hFE) of 100 minimum at 5mA collector current and 5V VCE.
Designed for DC-coupled digital interface applications, it supports input voltages up to +30V (VIN max) and withstands −5V reverse emitter-base voltage. Its 500mA IC rating and 0.3V VCE(sat) ensure efficient low-side load switching in 3.3V/5V microcontroller-driven circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCE(sat) | ≤ 0.3 V at IC = 50 mA, IB = 2.5 mA - ensures minimal conduction loss in high-duty-cycle switching |
| hFE | 100–600 at IC = 5 mA, VCE = 5 V - provides stable gain margin for reliable saturation across process variation |
| BVEBO | 5 V - defines maximum allowable reverse bias on base-emitter junction during logic transitions |
| IC(max) | 500 mA - supports driving solenoids, LEDs, and small relays directly from MCU GPIO |
| PD | 250 mW on FR4 PCB - sets thermal limit for continuous operation without heatsinking |
| RθJA | 500 °C/W - determines temperature rise per watt dissipated in standard layout |
| fT | 200 MHz - confirms suitability for low-speed digital switching, not RF use |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 rated molding compound, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for input bias and output current return path |
| 2 (Base) | Base terminal with internal R1 | Connected to 4.7kΩ resistor to pin 3; no external pull-up required |
| 3 (Collector) | Collector terminal | Main current output node; connects to load and supply rail |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 4.7kΩ nominal - eliminates need for external base resistor in 3.3V/5V logic-driven switches |
| R2 configuration | Open circuit - enables direct base drive or optional external feedback for enhanced stability |
| AEC-Q101 readiness | Qualified per AEC-Q101 - supports automotive-grade reliability requirements when manufactured in IATF 16949 facilities |
| Green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets RoHS 3 and environmental compliance mandates |
| SOT23 footprint compatibility | Standard JEDEC MO-178AA outline - enables drop-in replacement in existing layouts using 2.4mm × 1.3mm pad pattern |
Applications
| Automotive Body Control Unit | Industrial PLC Digital Output |
|---|---|
|
Use Scenario: Driving 12V LED indicators and small solenoids from 3.3V microcontroller GPIO pins in door module ECUs. IC Role / Device Role / Timing Role: Low-side saturated switch providing logic-level compatible current sinking with fast turn-on/turn-off. Use Value: Eliminates discrete base resistor, reduces BOM count, and maintains VCE(sat) ≤ 0.3V under 100mA load for consistent brightness and response. |
Use Scenario: Isolating and amplifying 24V field-side outputs from isolated 5V logic in modular I/O cards. IC Role / Device Role / Timing Role: Level-translating interface buffer with defined BVEBO = 5V to prevent latch-up during ESD transients. Use Value: Enables robust 24V sink capability while preserving logic integrity via controlled saturation and 500mA overload margin. |
| Consumer Appliance Control Panel | Medical Diagnostic Instrument I/O |
|
Use Scenario: Controlling status LEDs and buzzer drivers in white-goods control boards operating at ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: General-purpose digital switch with thermal derating support down to 150°C junction temperature. Use Value: Maintains 250mW power handling with 500°C/W RθJA on standard FR4, avoiding thermal runaway in compact enclosures. |
Use Scenario: Enabling/disabling sensor excitation lines and signal conditioning paths in portable diagnostic devices requiring low leakage. IC Role / Device Role / Timing Role: Precision on/off gate with IEBO ≤ 0.5µA at VEB = 4V to minimize standby current in battery-powered systems. Use Value: Guarantees <0.5µA cutoff current ensures multi-year battery life in always-on monitoring modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTD123TC-7-F | R1 = 2.2kΩ (vs. 4.7kΩ); same SOT23, BVEBO = 5V, hFE = 100–600 | Higher base current draw - better for slower-switching, higher-noise immunity designs | Select when stronger base drive is needed to guarantee saturation under marginal VCC or temperature conditions |
| DDTD114TC-7-F | R1 = 10kΩ (vs. 4.7kΩ); same SOT23, BVEBO = 5V, hFE = 100–600 | Lower base current consumption - optimized for ultra-low-power logic interfacing | Choose for battery-powered systems where input leakage and quiescent current must be minimized |
Compared with DDTD143TC-7-F, DDTD123TC-7-F delivers faster turn-on but increases base drive demand, while DDTD114TC-7-F reduces input current at the cost of slower edge rates - making the 4.7kΩ variant the balanced choice for general-purpose 3.3V/5V digital switching.
Availability
DDTD143TC-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and consumer appliance control panels requiring stable component supply and long-term obsolescence management.
Supply support for DDTD143TC-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 computing markets with ISO/TS 16949 and ISO 9001 certification.
This part belongs to the DDTD series of pre-biased NPN transistors designed specifically for simplified digital interface and low-side switching in space-constrained, cost-sensitive applications requiring AEC-Q101 readiness and green compliance.
FAQ
Is DDTD143TC-7-F pin-compatible with standard SOT23 NPN transistors?
No - DDTD143TC-7-F uses the standard SOT23 pinout (Emitter-Base-Collector on pins 1-2-3), but its internal 4.7kΩ R1 resistor between pins 2 and 3 means it is not a direct replacement for bare transistors. External base resistors must be omitted to avoid double-biasing and potential overdrive.
What is the maximum safe input voltage applied to the base terminal?
The absolute maximum input voltage between base and emitter (VEBO) is 5V. Exceeding this risks permanent damage to the base-emitter junction. For 12V or 24V logic interfaces, external clamping (e.g., Zener diode to emitter) is required before connecting to pin 2.
Does DDTD143TC-7-F support PWM switching at frequencies above 10kHz?
Yes - with fT = 200MHz and typical turn-on/turn-off times in the nanosecond range, it supports clean PWM switching up to at least 100kHz. However, VCE(sat) and power dissipation must be verified at target duty cycle and load current to avoid thermal overload.
Can DDTD143TC-7-F be used in linear amplifier configurations?
No - this device is characterized and optimized for saturated switching operation only. Its hFE specification is given at VCE = 5V and IC = 5mA, and no linearity, distortion, or small-signal parameters (e.g., gm, rπ) are provided in the datasheet. Use dedicated small-signal transistors for analog amplification.
DDTD143TC-7-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:
- Obsolete
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTD143TC-7-F FAQ
1.How can I place an order for DDTD143TC-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD143TC-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 DDTD143TC-7-F reliable?
The price and inventory of DDTD143TC-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 DDTD143TC-7-F is usually 5 days.
3.What payment methods are accepted for DDTD143TC-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD143TC-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD143TC-7-F?
DDTD143TC-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD143TC-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 DDTD143TC-7-F?
For technical support, including DDTD143TC-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD143TC-7-F requirements.
6.How does Aetrix verify that DDTD143TC-7-F is sourced from the original manufacturer or authorized distributors?
All DDTD143TC-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 DDTD143TC-7-F meets industry standards.
7.What is the process for return or replacement of DDTD143TC-7-F?
All DDTD143TC-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTD143TC-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 DDTD143TC-7-F part is unused and in its original packaging.
Return procedure for DDTD143TC-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTD143TC-7-F Tags
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MUN5211T1G
onsemi
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Rohm Semiconductor
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DTC114EKAT146
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DRDNB16W-7
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PDTC143ZT,215
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PDTC143XT,215
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MMUN2211LT1G
onsemi
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PDTC124ET,215
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