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Diodes Incorporated DDTA143TKA-7-F
- Part No.:
- DDTA143TKA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTA143TKA-7-F.pdf
- Description:
- TRANS PREBIAS PNP 50V SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,087
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Product details
Overview
DDTA143TKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with integrated 4.7 kΩ base bias resistor (R1 only), rated for -50 V VCEO, -100 mA IC, and 200 mW power dissipation in SC-59 package. It delivers hFE = 100–600 at IC = -1 mA, VCE = -5 V, and VCE(sat) ≤ -0.3 V at IC/IB = -1 mA/-0.1 mA - used in compact logic-level interface and load switching circuits.
For engineers reviewing the DDTA143TKA-7-F datasheet, DDTA143TKA-7-F pinout, DDTA143TKA-7-F application, or DDTA143TKA-7-F equivalent, this page provides verified electrical parameters, SC-59 terminal mapping, real-world use cases in level translation and LED driver stages, and validated alternative parts with documented R1/hFE and saturation voltage differences.
Technical Context
This device integrates a single 4.7 kΩ pull-up resistor between base and emitter (R1-only configuration), eliminating external bias components in simple switching applications. Its PNP topology enables high-side load control with TTL/CMOS-compatible input thresholds and low VCE(sat) under defined drive conditions.
The SC-59 package supports surface-mount assembly with JEDEC-standard thermal performance (RθJA = 625 °C/W on FR4) and moisture sensitivity Level 1 compliance. Electrical behavior is characterized across -55°C to +150°C, with guaranteed breakdown voltages of -50 V (VCBO, VCEO) and -5 V (VEBO).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -50 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration |
| IC (max) | -100 mA - Continuous DC collector current limit defining safe switching capacity |
| PD | 200 mW - Power dissipation limit at TA = 25°C, derating linearly above 25°C per Fig. 1 |
| hFE | 100–600 - DC current gain range at IC = -1 mA, VCE = -5 V, enabling predictable base drive sizing |
| VCE(sat) | ≤ -0.3 V - Saturation voltage at IC/IB = -1 mA/-0.1 mA, ensuring low conduction loss in on-state |
| R1 | 4.7 kΩ ±30% - Integrated base-emitter bias resistor enabling single-resistor logic interface |
| fT | 250 MHz - Gain-bandwidth product indicating usable frequency limit for small-signal amplification |
Pinout & Package
Package: SC-59 (SOT-23 variant), 3-pin surface-mount plastic case with UL 94V-0 rating, 0.008 g mass, and lead-free matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Current exit node in PNP operation; tied internally to R1 resistor end |
| 2 (Base) | Base terminal | Control input node; connected to R1 resistor opposite emitter |
| 3 (Collector) | Collector terminal | Current entry node; main switched output path with VCEO = -50 V rating |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 4.7 kΩ ±30%, eliminating external bias network for TTL/CMOS-driven switching |
| Low saturation voltage | VCE(sat) ≤ -0.3 V at IC/IB = -1 mA/-0.1 mA, minimizing power loss in on-state |
| Wide operating temperature | -55°C to +150°C junction range, supporting industrial and automotive under-hood environments |
| Green molding compound | Halogen-free, Sb2O3-free encapsulation for RoHS-compliant production (Date Code 0627+) |
Applications
| LED Driver Stage | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller outputs. IC Role / Device Role / Timing Role: PNP switch controlling LED anode connection to supply rail; base driven by MCU GPIO. Use Value: Eliminates need for external base resistor due to integrated 4.7 kΩ R1, reducing BOM count and PCB area. | Use Scenario: Level-shifting 1.8 V/3.3 V logic signals to control higher-voltage peripherals. IC Role / Device Role / Timing Role: Active-low level translator with fast turn-off enabled by low COB and 250 MHz fT. Use Value: VCE(sat) ≤ -0.3 V ensures minimal voltage drop, preserving noise margin in signal chain. |
| Power Rail Enable Switch | Load Detection Circuit |
Use Scenario: Enabling/disabling 5 V auxiliary rails in portable instrumentation. IC Role / Device Role / Timing Role: High-side switch placing load between VCC and collector; emitter tied to VCC. Use Value: -50 V VCEO rating provides margin against supply transients; 200 mW PD supports continuous 100 mA loads. | Use Scenario: Detecting open-circuit or short-circuit conditions in sensor wiring. IC Role / Device Role / Timing Role: Current-sensing switch with known hFE and R1 enabling precise IC prediction from base voltage. Use Value: Tight hFE range (100–600) and ±30% R1 tolerance allow calibrated current threshold detection without trimming. |
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 |
|---|---|---|---|
| DDTA143ZCA-7 | Same R1 = 4.7 kΩ, but SC-70 package (smaller footprint, higher RθJA = 700 °C/W) | Higher thermal resistance limits continuous current in dense layouts | Select when board space is constrained and power dissipation ≤ 150 mW |
| NSVDDTA143TKA | Automotive-grade version (AEC-Q101 qualified), identical R1 and hFE, same SC-59 package | Qualified for automotive ambient temperature and reliability requirements | Select for automotive body electronics or infotainment power control where qualification is mandatory |
Compared with DDTA143TKA-7-F, DDTA143ZCA-7 trades thermal performance for size reduction, while NSVDDTA143TKA adds AEC-Q101 qualification without altering electrical specs - enabling direct substitution in automotive designs requiring certified components.
Availability
DDTA143TKA-7-F is available at Aetrix Electronics and suitable for LED driver stages, microcontroller GPIO interfaces, and power rail enable switches requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for DDTA143TKA-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, energy-efficient components for industrial, computing, and consumer markets.
The DDTA (R1-only series) product line delivers pre-biased PNP transistors optimized for simplified logic-level switching in space-constrained, cost-sensitive applications such as portable electronics and IoT edge nodes.
FAQ
What is the function of the internal resistor in DDTA143TKA-7-F?
The internal 4.7 kΩ resistor (R1) connects between base and emitter, providing fixed bias to enable direct connection to digital logic outputs without external components. It sets the base current required for saturation at specified IC/IB ratios, simplifying circuit design for on/off switching applications.
Can DDTA143TKA-7-F replace a standard PNP transistor like BC807?
No - DDTA143TKA-7-F is not a drop-in replacement for BC807 because it lacks independent base control and includes a fixed internal resistor. It requires redesign of the base drive network; BC807 needs external bias resistors, while DDTA143TKA-7-F assumes logic-level input directly applied to its base terminal.
What is the maximum operating temperature for continuous use?
The junction temperature must not exceed +150°C. At ambient temperatures above 25°C, power dissipation must be linearly derated per Fig. 1 in the datasheet: PD = 200 mW − (TA − 25) × 0.32 mW/°C, based on RθJA = 625 °C/W and recommended FR4 pad layout.
Is DDTA143TKA-7-F suitable for analog amplification?
No - it is optimized for switching, not linear amplification. The integrated R1 resistor prevents stable DC bias point setting required for Class-A operation, and hFE variation across current range makes gain unpredictable. Use discrete transistors like MMBT3906 for amplifier stages.
DDTA143TKA-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:
- 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):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 2.5mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
DDTA143TKA-7-F FAQ
1.How can I place an order for DDTA143TKA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA143TKA-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 DDTA143TKA-7-F reliable?
The price and inventory of DDTA143TKA-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 DDTA143TKA-7-F is usually 5 days.
3.What payment methods are accepted for DDTA143TKA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA143TKA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA143TKA-7-F?
DDTA143TKA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA143TKA-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 DDTA143TKA-7-F?
For technical support, including DDTA143TKA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA143TKA-7-F requirements.
6.How does Aetrix verify that DDTA143TKA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTA143TKA-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 DDTA143TKA-7-F meets industry standards.
7.What is the process for return or replacement of DDTA143TKA-7-F?
All DDTA143TKA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA143TKA-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 DDTA143TKA-7-F part is unused and in its original packaging.
Return procedure for DDTA143TKA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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