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Diodes Incorporated DDTC143ZCA-7
- Part No.:
- DDTC143ZCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC143ZCA-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,785
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Product details
Overview
DDTC143ZCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = 4.7 kΩ and R2 = 47 kΩ (R1 ≠ R2), VCEO = 50 V, IC(MAX) = 100 mA, and DC current gain (hFE) = 80 at IC = 10 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 DDTC143ZCA-7 datasheet, DDTC143ZCA-7 pinout, DDTC143ZCA-7 application, or DDTC143ZCA-7 equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, confirmed automotive-grade reliability status, and real-world use cases in discrete logic interface circuits.
Technical Context
This device integrates a single NPN transistor with two non-matching on-die base bias resistors (R1 = 4.7 kΩ, R2 = 47 kΩ), enabling direct TTL/CMOS-compatible input drive without external components. Its VI(OFF) = 0.5 V and VI(ON) = 2.5 V (at IO = 5 mA) define clean logic threshold behavior.
Designed for high-reliability surface-mount applications, it operates across –55°C to +150°C, delivers 200 mW power dissipation on FR4 PCB, and achieves fT = 250 MHz - supporting fast-switching digital signal routing in compact automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - supports rail-to-rail operation in 24 V automotive systems with margin. |
| IC(MAX) | 100 mA - drives LED indicators, relays, and small solenoids directly. |
| R1 / R2 | 4.7 kΩ / 47 kΩ - provides fixed 10:1 bias ratio for stable saturation with low input current (IIN = 1.8 mA @ VIN = 5 V). |
| hFE | 80 @ IC = 10 mA - ensures robust current amplification in logic-level switching. |
| VCE(SAT) | 0.3 V @ IC/IB = 5 mA/0.25 mA - minimizes conduction loss in power-efficient digital interfaces. |
| fT | 250 MHz - enables reliable operation in pulse-width modulated (PWM) control signals up to ~20 MHz. |
Pinout & Package
Package: SOT23 - surface-mount plastic case, 0.008 g weight, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node / GND return path | Connected internally to R2; serves as common reference for bias network and output sink. |
| 2 (Base) | Control input node | Connected between R1 and R2; accepts logic-level voltage to switch transistor ON/OFF. |
| 3 (Collector) | Active output node | Delivers switched load current; electrically isolated from bias network except through transistor junction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates 2 external resistors per channel, reducing BOM count and PCB area in multi-channel logic translators. |
| AEC-Q101 qualification | Validated for automotive under-hood environments including thermal cycling, humidity, and vibration stress. |
| Green, halogen-free construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with EU RoHS 2 and automotive OEM sustainability requirements. |
| SOT23 footprint compatibility | Enables drop-in replacement of standard SOT23 transistors (e.g., MMBT3904) while adding bias integration. |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Input Module |
|---|---|
Use Scenario: Level-shifting 3.3 V microcontroller GPIO to drive 12 V lamp loads in door module. IC Role / Device Role: Digital switch translating logic-high to collector-sink output with defined saturation voltage. Use Value: Eliminates need for discrete base resistor pair; reduces component count by 2 per channel and improves layout repeatability. |
Use Scenario: Isolating 24 V field sensor inputs into 5 V logic domain of programmable controller. IC Role / Device Role: Input stage translator converting industrial voltage levels to compatible CMOS thresholds. Use Value: Built-in R1/R2 ensures consistent turn-on behavior across temperature (–40°C to +85°C ambient), reducing calibration overhead. |
| Consumer Appliance Control Board | Medical Diagnostic Equipment Interface |
Use Scenario: Driving buzzer and status LEDs in smart HVAC control panel using 3.3 V MCU outputs. IC Role / Device Role: Low-power digital output buffer with predictable IIN = 1.8 mA at 5 V. Use Value: Fixed bias ratio prevents overdrive-induced thermal stress during continuous PWM operation. |
Use Scenario: Interfacing isolated analog front-end signals to microcontroller GPIOs in portable ultrasound units. IC Role / Device Role: Safe, low-leakage signal conditioning stage with IO(OFF) ≤ 0.5 μA at VCC = 50 V. Use Value: Ensures minimal signal corruption during standby mode, critical for low-noise diagnostic accuracy. |
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 |
|---|---|---|---|
| DDTC143ZCAQ-7-F | Identical electrical specs; automotive-grade marking (N11) and PPAP documentation support. | Required for Tier-1 automotive production; same thermal and switching performance. | Select when full AEC-Q101 PPAP compliance and traceable lot documentation are mandatory. |
| NSV143ZMUTBG | R1 = 4.7 kΩ, R2 = 47 kΩ, but VCEO = 40 V and IC(MAX) = 100 mA; not AEC-Q101 qualified. | Limited to industrial/commercial use; lacks automotive qualification and extended temperature validation. | Acceptable for cost-sensitive non-automotive designs where 40 V rating suffices and qualification is not required. |
Compared with DDTC143ZCA-7, the Q-grade variant adds formal PPAP readiness without altering electrical behavior, while NSV143ZMUTBG trades qualification for lower cost and reduced voltage margin - making each suitable for distinct supply-chain and reliability tiers.
Availability
DDTC143ZCA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, consumer appliance control boards, and medical diagnostic interface modules requiring stable component supply and AEC-Q101 reliability assurance.
Supply support for DDTC143ZCA-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, energy-efficient components for automotive, industrial, and consumer markets.
This part belongs to the DDTC (R1≠R2 Series) CA family - engineered specifically for simplified digital interface design in space-constrained, high-volume applications where integrated biasing eliminates external resistor placement errors and improves manufacturing yield.
FAQ
What is the maximum operating temperature for DDTC143ZCA-7?
The DDTC143ZCA-7 is rated for junction and storage temperatures from –55°C to +150°C. Its thermal resistance RθJA is 625°C/W on a standard FR4 board with minimum pad layout, allowing safe operation at +125°C ambient when dissipating ≤120 mW - verified per AEC-Q101 thermal cycling test conditions.
Can DDTC143ZCA-7 replace a standard MMBT3904 with external bias resistors?
Yes - the DDTC143ZCA-7 replaces MMBT3904 plus two discrete base resistors (4.7 kΩ and 47 kΩ) in a single SOT23 package. Its VI(ON) = 2.5 V and IIN = 1.8 mA at 5 V match typical 3.3 V/5 V logic drive requirements, and its VCE(SAT) = 0.3 V ensures equivalent switching efficiency without layout redesign.
Is DDTC143ZCA-7 lead-free and RoHS compliant?
Yes - DDTC143ZCA-7 is fully lead-free and RoHS 2 (2011/65/EU) compliant, with no intentionally added lead. It also meets Diodes Incorporated's "Green" definition: <900 ppm bromine, <900 ppm chlorine, and <1000 ppm antimony compounds, verified per JESD22-A112 and IEC 62321 testing protocols.
What is the meaning of the 'N11' marking on DDTC143ZCA-7-F tape-and-reel packaging?
The 'N11' marking is Diodes Incorporated's product type code for the DDTC143ZCA-7-F variant, uniquely identifying this specific R1/R2 combination (4.7 kΩ / 47 kΩ) within the CA series. It appears on the top-side laser marking and correlates to the ordering matrix in DS30330 Rev. 11–2, ensuring traceability to datasheet-specified electrical characteristics.
DDTC143ZCA-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:
- NPN - 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):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 5mA
- 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
DDTC143ZCA-7 FAQ
1.How can I place an order for DDTC143ZCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC143ZCA-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 DDTC143ZCA-7 reliable?
The price and inventory of DDTC143ZCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC143ZCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC143ZCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC143ZCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC143ZCA-7?
DDTC143ZCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC143ZCA-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 DDTC143ZCA-7?
For technical support, including DDTC143ZCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC143ZCA-7 requirements.
6.How does Aetrix verify that DDTC143ZCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC143ZCA-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 DDTC143ZCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC143ZCA-7?
All DDTC143ZCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC143ZCA-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 DDTC143ZCA-7 part is unused and in its original packaging.
Return procedure for DDTC143ZCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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