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Diodes Incorporated DDTA124ECA-7
- Part No.:
- DDTA124ECA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTA124ECA-7.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,002
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Product details
Overview
DDTA124ECA-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = R2 = 22 kΩ, −40 V input voltage range, −30 mA output current rating, and AEC-Q101 qualification for automotive applications such as LED load switching in body control modules.
For engineers reviewing the DDTA124ECA-7 datasheet, DDTA124ECA-7 pinout, DDTA124ECA-7 application, or DDTA124ECA-7 equivalent, key selection criteria include verified input resistor tolerance (±30%), guaranteed DC current gain (56× at −5 V, −5 mA), thermal resistance (625 °C/W), and automotive-grade reliability under −55 °C to +150 °C operation.
Technical Context
This device integrates a PNP bipolar transistor with two matched on-die biasing resistors (R1 = R2 = 22 kΩ) to simplify digital interface design. It operates as a single-transistor inverter with defined turn-on/off thresholds: VI(ON) = −1.9 V (typ), VI(OFF) = −1.1 V (typ), and VO(ON) ≤ −0.3 V at −5 mA output.
Designed for direct logic-level drive, it supports rail-to-rail input swing from +10 V to −40 V and delivers stable saturation performance (VCE(SAT) ≤ −0.3 V) across ambient temperatures from −55 °C to +150 °C, with thermal derating starting at 200 mW at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 / R2 Value | 22 kΩ ±30% - sets precise base bias for predictable turn-on at −1.9 V and robust noise immunity |
| VI(OFF) | −1.1 V (typ) - ensures reliable cutoff when input ≥ −0.5 V, preventing false triggering |
| VI(ON) | −1.9 V (typ) - guarantees full conduction with standard CMOS/TTL low-level outputs |
| IO(max) | −30 mA - supports medium-current loads like automotive LEDs or relay coils without external drivers |
| GL | 56 (min) - provides sufficient current gain for stable switching with low base drive requirements |
| PD | 200 mW - enables operation on standard FR-4 PCBs with minimal heatsinking |
| RθJA | 625 °C/W - defines thermal limit: max junction rise = 125 °C above ambient at full power |
Pinout & Package
Package: SOT23 - surface-mount plastic case, 0.008 g weight, UL 94V-0 rated, moisture sensitivity level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal | Connected to positive supply rail; output current flows out of this pin |
| 2 (Base) | Bias node | Internal connection point between R1 and R2; not externally accessible |
| 3 (Collector) | Switched output terminal | Connected to load; sinks current when transistor is on |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 22 kΩ matched resistors eliminate external components and reduce layout area by ~30% |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HAST, and mechanical shock per JESD22 |
| Green construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets RoHS 3 and ELV standards |
| Low saturation voltage | VCE(SAT) ≤ −0.3 V at −5 mA ensures minimal power loss and heat generation in load-switching paths |
Applications
| Automotive Body Control | Industrial I/O Interface |
|---|---|
Use Scenario: Switching 12 V LED indicators in door modules and dashboard panels. IC Role / Device Role / Timing Role: Single-stage PNP load switch driven directly by microcontroller GPIO pins. Use Value: Eliminates need for discrete base resistor and reduces BOM count by one component per channel. | Use Scenario: Level-shifting and driving solenoid valves in PLC output cards. IC Role / Device Role / Timing Role: High-side switch translating 3.3 V/5 V logic to −24 V industrial bus signals. Use Value: Withstands −40 V input transients and maintains reliable off-state leakage <0.5 µA at −50 V. |
| Consumer Appliance Control | Medical Diagnostic Equipment |
Use Scenario: Controlling backlight inverters and fan speed regulators in smart HVAC systems. IC Role / Device Role / Timing Role: Digital enable/disable switch for auxiliary power rails. Use Value: Guaranteed −30 mA output current supports typical inverter gate charge requirements without derating. | Use Scenario: Isolated signal conditioning in portable ultrasound probe interfaces. IC Role / Device Role / Timing Role: Low-noise, high-reliability switch for analog multiplexer enable lines. Use Value: AEC-Q101 qualification ensures long-term stability and traceable lot control required for Class II medical devices. |
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 |
|---|---|---|---|
| DDTA144ECA-7-F | R1 = R2 = 47 kΩ; higher input impedance; lower IL (0.36 mA at −5 V) | Better suited for ultra-low-power MCU wake-up inputs or high-impedance sensor interfaces | Select when base drive current must be minimized and load current ≤ −2 mA |
| DDTA114ECA-7-F | R1 = R2 = 10 kΩ; lower input impedance; higher IL (0.88 mA at −5 V); GL = 30× | Preferred for faster switching in 24 V industrial controls where higher base current is acceptable | Select when faster turn-on response and higher output current (−50 mA) are required |
Compared with DDTA144ECA-7-F and DDTA114ECA-7-F, DDTA124ECA-7 strikes a balanced trade-off: sufficient input impedance to reduce MCU loading while delivering −30 mA output with proven thermal margin in automotive under-hood environments.
Availability
DDTA124ECA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and consumer appliance control systems requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTA124ECA-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The DDTA series belongs to Diodes' pre-biased transistor product line, engineered specifically for simplified digital interface design in space-constrained, high-reliability applications where board area and assembly cost reduction are critical.
FAQ
What is the maximum allowable collector-emitter voltage for DDTA124ECA-7?
The absolute maximum VCE rating is −50 V. This value is specified under steady-state conditions at TA = +25 °C and reflects the device's ability to block reverse voltage in high-side switching configurations. Operation beyond this rating risks permanent breakdown, especially during transient events like load dump in automotive 12 V systems.
Does DDTA124ECA-7 require an external pull-up resistor on the input?
No external pull-up is required. The internal R1–R2 network forms a voltage divider that biases the base when the input is left floating or driven high, ensuring defined off-state behavior. The device is designed for direct connection to open-drain or push-pull logic outputs without additional passive components.
Can DDTA124ECA-7 be used in a 24 V industrial system?
Yes - its −40 V input voltage range and −50 V VCC rating accommodate 24 V nominal systems with typical transients up to −40 V. Verified operation at −40 V input with −5 mA output confirms compatibility with DIN-rail PLC I/O modules and factory automation controllers.
How does the R1 = R2 configuration affect switching speed?
The matched 22 kΩ resistors provide consistent base charging/discharging time constants, resulting in typical turn-on/turn-off delays of ~150 ns at −5 mA load. This is sufficient for PWM frequencies up to 1 MHz in LED dimming applications but not optimized for RF or high-speed data line switching.
DDTA124ECA-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:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 22 kOhms
- Resistor - Emitter Base (R2):
- 22 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 56 @ 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
DDTA124ECA-7 FAQ
1.How can I place an order for DDTA124ECA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA124ECA-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 DDTA124ECA-7 reliable?
The price and inventory of DDTA124ECA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA124ECA-7 is usually 5 days.
3.What payment methods are accepted for DDTA124ECA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA124ECA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA124ECA-7?
DDTA124ECA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA124ECA-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 DDTA124ECA-7?
For technical support, including DDTA124ECA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA124ECA-7 requirements.
6.How does Aetrix verify that DDTA124ECA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA124ECA-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 DDTA124ECA-7 meets industry standards.
7.What is the process for return or replacement of DDTA124ECA-7?
All DDTA124ECA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA124ECA-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 DDTA124ECA-7 part is unused and in its original packaging.
Return procedure for DDTA124ECA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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