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Diodes Incorporated DDTC124GCA-7-F
- Part No.:
- DDTC124GCA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC124GCA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,928
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Product details
Overview
DDTC124GCA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT-23 package, featuring a built-in 22 kΩ bias resistor (R2 only), 50 V VCEO, 100 mA IC(max), and hFE = 56 (typ.) at 5 mA/5 V - used for level-shifting and digital switching in space-constrained logic interface circuits.
For engineers reviewing the DDTC124GCA-7-F datasheet, DDTC124GCA-7-F pinout, DDTC124GCA-7-F application, or DDTC124GCA-7-F equivalent, key selection criteria include verified R2-only bias topology, guaranteed VCEO/VCBO ratings, hFE binning consistency, thermal derating per FR4 layout, and RoHS-compliant green molding compound compliance.
Technical Context
This device implements a monolithic NPN transistor with a single integrated base-emitter pull-up resistor (R2), eliminating external bias components in saturated-switch applications. It operates with fixed DC current transfer ratio (hFE = 56 typ. at IC = 5 mA, VCE = 5 V) and exhibits VCE(sat) ≤ 0.3 V at IC = 10 mA / IB = 0.5 mA.
The R2-only configuration simplifies PCB layout by removing R1, reducing component count in high-density digital input buffers and microcontroller GPIO drivers. Its 625 °C/W RθJA rating assumes use on FR4 with Diodes Inc.'s AP02001-recommended pad layout, and it supports operation from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - maximum safe collector-emitter voltage before breakdown under open-base conditions |
| IC(max) | 100 mA - absolute maximum continuous collector current without thermal runaway on standard FR4 |
| hFE | 56 (typ.) at 5 mA/5 V - ensures predictable saturation drive for 3.3 V/5 V logic-level switching |
| R2 | 22 kΩ ±30% - sole internal bias resistor enabling direct connection to MCU outputs without external R1 |
| VCE(sat) | ≤ 0.3 V at IC = 10 mA, IB = 0.5 mA - guarantees low conduction loss in active-low load switching |
| PD | 200 mW - power dissipation limit at TA = 25 °C, derates linearly above 25 °C per Fig. 1 |
| fT | 250 MHz - usable for signal amplification up to mid-VHF range, though optimized for DC/switching |
Pinout & Package
SOT-23 plastic surface-mount package (JEDEC TO-236AB), 3-terminal, lead-free matte tin plating over Alloy 42 leadframe, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for bias network; connects directly to GND or logic return path |
| 2 (Base) | Base terminal | Input node tied internally to R2; accepts TTL/CMOS logic drive without series resistor |
| 3 (Collector) | Collector terminal | Switched output node; sinks load current when driven high at Base |
Key Features
| Feature | Design Value |
|---|---|
| R2-only bias topology | Eliminates need for external base resistor (R1), reducing BOM count and layout area in GPIO interface designs |
| 22 kΩ internal R2 tolerance | ±30% ensures consistent turn-on threshold across production lots without calibration |
| Green RoHS-compliant construction | Halogen- and antimony-free molding compound meets IPC-J-STD-609A Class 1 requirements |
| Low VCE(sat) | ≤ 0.3 V enables <100 mW power loss at 10 mA load, critical for battery-powered sensor nodes |
Applications
| Microcontroller GPIO Interface | Level-Shifting Buffer |
|---|---|
Use Scenario: Driving LED indicators or optocoupler inputs from 3.3 V MCU pins with limited sink current capability. IC Role / Device Role: NPN switch configured as low-side driver with integrated R2 bias. Use Value: Eliminates discrete base resistor, reduces footprint by 0.5 mm², and maintains VCE(sat) ≤ 0.3 V at 5–10 mA loads. | Use Scenario: Converting 1.8 V logic signals to 5 V-compatible levels for legacy peripherals. IC Role / Device Role: Active pull-down stage in open-collector level translation architecture. Use Value: Guaranteed 50 V VCBO withstand prevents latch-up during voltage transients; hFE = 56 ensures reliable turn-on at 1.8 V input. |
| Industrial Digital Input Module | Automotive Body Control Unit |
Use Scenario: Isolating and conditioning 24 V field signals into 3.3 V microcontroller inputs via optocoupler-driven circuitry. IC Role / Device Role: Pre-biased transistor driving optocoupler LED anode in sinking configuration. Use Value: 100 mA IC(max) and –55 °C to +150 °C operating range support harsh industrial environments. | Use Scenario: Controlling interior lighting loads (e.g., map lights, courtesy lamps) using PWM from body controller IC. IC Role / Device Role: Low-side switch for resistive lamp loads with fast turn-off enabled by R2-only structure. Use Value: 250 MHz fT ensures clean PWM edge response up to 20 kHz; RoHS Green compliance satisfies automotive ELV directive. |
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 |
|---|---|---|---|
| DDTC124ECA-7-F | Same die, different marking code (N27 → N27E); identical R2 = 22 kΩ, hFE = 56, and SOT-23 package | No functional difference; ECA suffix indicates alternate date-code traceability, not performance variation | Select when supply chain requires batch-specific traceability without electrical change |
| NSV124GUT1G | 22 kΩ R2, but hFE = 60–120 (min–max), wider gain spread; VCEO = 50 V, same SOT-23 | Higher hFE variability may require design margining in precision current-sink applications | Prefer for cost-sensitive consumer designs where gain tolerance is less critical than industrial-grade consistency |
Compared with DDTC124GCA-7-F, DDTC124ECA-7-F offers identical electrical behavior with enhanced traceability, while NSV124GUT1G trades tighter hFE control for broader gain range - making the original optimal for deterministic switching in industrial control and automotive modules.
Availability
DDTC124GCA-7-F is available at Aetrix Electronics and suitable for microcontroller GPIO interfaces, industrial digital input modules, and automotive body control units requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for DDTC124GCA-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, application-optimized components for industrial, computing, and automotive markets.
This part belongs to the DDTC R2-Only Series - designed specifically for simplified digital switching in space-constrained systems where minimizing external bias components is critical to layout efficiency and cost control.
FAQ
What is the function of the "R2-only" configuration in DDTC124GCA-7-F?
The R2-only configuration means only a single 22 kΩ resistor connects the base to the positive supply (or logic high), with no external R1 required. This enables direct connection to microcontroller GPIO pins, reducing component count and PCB area while maintaining predictable turn-on behavior at 3.3 V or 5 V logic levels.
Does DDTC124GCA-7-F support 1.8 V logic input drive?
Yes - its VEBO = 5 V and hFE = 56 at IC = 5 mA ensure reliable turn-on with 1.8 V applied to the base through the internal R2. At 1.8 V input, base current is ~82 μA, sufficient to saturate the transistor for typical 5–10 mA loads.
How does the thermal performance of DDTC124GCA-7-F compare to standard SOT-23 transistors?
Its RθJA = 625 °C/W matches industry-standard SOT-23 devices but assumes Diodes Inc.'s AP02001-recommended copper pad layout. Without that layout, thermal resistance increases significantly - actual junction temperature rise must be calculated using measured ambient and power dissipation (PD = VCE(sat) × IC).
Is DDTC124GCA-7-F pin-compatible with DDTA124GCA-7-F?
No - DDTC124GCA-7-F is NPN with R2-only bias; DDTA124GCA-7-F is its complementary PNP counterpart. They share the same SOT-23 footprint and marking format but have opposite polarity and inverted bias topology - not interchangeable without circuit redesign.
DDTC124GCA-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:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- -
- 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 (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTC124GCA-7-F FAQ
1.How can I place an order for DDTC124GCA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC124GCA-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 DDTC124GCA-7-F reliable?
The price and inventory of DDTC124GCA-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 DDTC124GCA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC124GCA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC124GCA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC124GCA-7-F?
DDTC124GCA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC124GCA-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 DDTC124GCA-7-F?
For technical support, including DDTC124GCA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC124GCA-7-F requirements.
6.How does Aetrix verify that DDTC124GCA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC124GCA-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 DDTC124GCA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC124GCA-7-F?
All DDTC124GCA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC124GCA-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 DDTC124GCA-7-F part is unused and in its original packaging.
Return procedure for DDTC124GCA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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