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Diodes Incorporated DDTC124ECA-7
- Part No.:
- DDTC124ECA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-23-3 Flat Leads
- Datasheet:
-
DDTC124ECA-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23F
- Quantity:
- Payment:
- Shipping:
Inventory:2,524
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Product details
Overview
DDTC124ECA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = R2 = 22 kΩ, 50 V VCEO, 30 mA IC(max), and AEC-Q101 qualification for automotive applications. It functions as a digital switch or level translator in low-power logic interface circuits, such as microcontroller GPIO drivers and LED load control.
For engineers reviewing the DDTC124ECA-7 datasheet, DDTC124ECA-7 pinout, DDTC124ECA-7 application, or DDTC124ECA-7 equivalent, key selection considerations include input resistor tolerance (±30%), guaranteed saturation voltage (VCE(sat) ≤ 0.3 V at IC/IB = 5 mA/0.25 mA), DC current gain (GL ≥ 56), thermal resistance (RθJA = 625 °C/W), and AEC-Q101 compliance for automotive-grade reliability.
Technical Context
This device integrates two matched 22 kΩ bias resistors (R1 = R2) to configure a single-NPN transistor with base biasing network, eliminating external components for digital switching. Its internal schematic implements a grounded-emitter amplifier with resistor-degenerated base drive, enabling direct TTL/CMOS logic-level compatibility.
Designed for high-reliability automotive environments, it supports −55 °C to +150 °C operation, meets J-STD-020 moisture sensitivity Level 1, and uses halogen- and antimony-free "Green" molding compound rated UL 94V-0. The SOT23 package ensures compact board footprint and thermal performance suitable for space-constrained modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V automotive supply rails with margin. |
| IC(max) | 30 mA - Continuous collector current rating; supports driving small LEDs, relays, or logic inputs without external current limiting. |
| R1 = R2 | 22 kΩ ±30% - Matched on-die bias resistors; eliminates need for two external resistors in standard digital switch configuration. |
| VCE(sat) | ≤ 0.3 V at IC/IB = 5 mA/0.25 mA - Ensures low conduction loss and minimal power dissipation in saturated switching mode. |
| GL | ≥ 56 - DC current gain under specified test condition; guarantees reliable turn-on with standard logic output drive capability. |
| PD | 200 mW - Maximum power dissipation on FR4 PCB with minimum pad layout; defines thermal derating envelope for continuous operation. |
| fT | 250 MHz - Gain-bandwidth product; supports fast switching up to ~10–20 MHz with adequate gain margin for signal integrity. |
Pinout & Package
SOT23 surface-mount plastic package (JEDEC TO-236AB), 3-terminal, 0.008 g weight, UL 94V-0 flammability rating, matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Ground reference node for the NPN transistor; connects to system GND in common-emitter switch configuration. |
| 2 (Base) | Base connection point | Internally tied to junction of R1 and R2; accepts logic-level input signal directly without external pull-up/down. |
| 3 (Collector) | Collector terminal | Output node; sinks current from load (e.g., LED anode or MCU input) when transistor is saturated. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 22 kΩ matched resistors reduce BOM count and PCB area by replacing two discrete resistors in standard digital switch topology. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics requiring extended temperature and reliability assurance. |
| Halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) with Br+Cl < 1500 ppm and Sb < 1000 ppm; supports environmental compliance in global OEM programs. |
| Low VCE(sat) at low IB | 0.3 V max at IC/IB = 5 mA/0.25 mA enables efficient switching with weak logic drivers (e.g., 3.3 V MCU GPIO). |
Applications
| Automotive Body Control Module | Industrial PLC Input Interface |
|---|---|
|
Use Scenario: Driving indicator LEDs and status lamps in door modules and lighting controllers. IC Role / Device Role / Timing Role: Digital switch translating 3.3 V/5 V MCU outputs to 12 V lamp loads via open-collector configuration. Use Value: Eliminates external base resistors and reduces component count while maintaining AEC-Q101 reliability for 15-year vehicle service life. |
Use Scenario: Isolating and conditioning 24 V industrial sensor signals into 3.3 V microcontroller inputs. IC Role / Device Role / Timing Role: Level-shifting buffer with built-in pull-down and noise immunity via resistor-biased NPN topology. Use Value: Provides predictable turn-on threshold (VIN(on) typ. 1.9 V) and low leakage (<0.5 μA off-state) for robust field-side interfacing. |
| Consumer Appliance Control Panel | Medical Diagnostic Equipment UI |
|
Use Scenario: Controlling backlight brightness and button feedback LEDs in smart home appliances. IC Role / Device Role / Timing Role: Constant-current switch regulating LED current via fixed IC limit and saturation voltage control. Use Value: Enables consistent LED intensity across varying supply voltages (5–24 V) without recalculating external resistor values. |
Use Scenario: Interfacing tactile switches and status indicators in portable diagnostic handhelds. IC Role / Device Role / Timing Role: Low-power logic buffer ensuring ESD-safe signal translation between user interface and main processor. Use Value: Delivers 0.1 V typical VCE(sat) and 56+ DC gain to maintain responsiveness even with aging battery supplies down to 2.8 V. |
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 |
|---|---|---|---|
| DDTC124ECAQ-7-F | Identical electrical specs and package; marked for automotive use with PPAP documentation support. | Qualified for ASIL-B systems requiring full automotive traceability and change notification. | Select when full PPAP deliverables and automotive-specific quality documentation are contractually required. |
| NSVD124EWT1G | Same R1=R2=22 kΩ, but higher IC(max) = 100 mA and lower RθJA = 400 °C/W; no AEC-Q101 certification. | Preferred for industrial high-current switching where automotive qualification is unnecessary. | Choose for cost-sensitive non-automotive designs needing higher current headroom and better thermal performance. |
Compared with DDTC124ECA-7, the automotive-grade DDTC124ECAQ-7-F adds PPAP readiness without electrical trade-offs, while NSVD124EWT1G trades AEC-Q101 compliance for higher current capability and improved thermal resistance-making each optimal for distinct reliability vs. performance priorities.
Availability
DDTC124ECA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance control panels requiring stable component supply and long-term lifecycle support.
Supply support for DDTC124ECA-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 components for automotive, industrial, and computing markets since 1960.
This part belongs to the DDTC (R1 = R2 Series) CA pre-biased transistor family, designed specifically to simplify digital interface design in space- and cost-constrained applications while meeting stringent automotive qualification requirements.
FAQ
What is the maximum operating temperature for DDTC124ECA-7?
The DDTC124ECA-7 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 pad layout, meaning ambient temperature must be limited to ≤ +85 °C at full 200 mW power dissipation to stay within safe junction limits.
Can DDTC124ECA-7 replace a standard 2N3904 with external bias resistors?
Yes-it replaces a 2N3904 plus two 22 kΩ resistors in common-emitter digital switch configurations. Its integrated R1=R2 network provides identical biasing behavior, but with tighter resistor matching (0.8–1.2% ratio tolerance) and guaranteed VCE(sat) ≤ 0.3 V at IC/IB = 5 mA/0.25 mA, improving consistency over discrete implementations.
Is DDTC124ECA-7 compatible with lead-free reflow profiles?
Yes-the device is fully RoHS 3 compliant and qualified for lead-free reflow per J-STD-020. Its moisture sensitivity level is Level 1, meaning it can be stored indefinitely at ≤ 30 °C/85% RH without baking prior to assembly, and withstands peak reflow temperatures up to 260 °C.
What does the "-7" suffix indicate in DDTC124ECA-7?
The "-7" denotes a 7-inch tape-and-reel packaging format containing 3,000 units per reel, with 8 mm tape width. This is the standard logistics configuration for automated SMT placement and matches Diodes Incorporated's standard SOT23 reel specification for high-volume manufacturing.
DDTC124ECA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-3 Flat Leads
- 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23F
DDTC124ECA-7 FAQ
1.How can I place an order for DDTC124ECA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC124ECA-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 DDTC124ECA-7 reliable?
The price and inventory of DDTC124ECA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC124ECA-7 is usually 5 days.
3.What payment methods are accepted for DDTC124ECA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC124ECA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC124ECA-7?
DDTC124ECA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC124ECA-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 DDTC124ECA-7?
For technical support, including DDTC124ECA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC124ECA-7 requirements.
6.How does Aetrix verify that DDTC124ECA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC124ECA-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 DDTC124ECA-7 meets industry standards.
7.What is the process for return or replacement of DDTC124ECA-7?
All DDTC124ECA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC124ECA-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 DDTC124ECA-7 part is unused and in its original packaging.
Return procedure for DDTC124ECA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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