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Diodes Incorporated DDTD123TC-7-F
- Part No.:
- DDTD123TC-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTD123TC-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:84,583
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Product details
Overview
DDTD123TC-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT23 package, featuring built-in 2.2kΩ and 10kΩ bias resistors, 5V emitter-base breakdown voltage (BVEBO), 500mA continuous collector current (IC), and 100–600 DC current gain (hFE) at IC = 5mA. It serves as a compact, surface-mount switch in automotive body control modules for LED driver enable logic.
For engineers reviewing the DDTD123TC-7-F datasheet, DDTD123TC-7-F pinout, DDTD123TC-7-F application, or DDTD123TC-7-F equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, real-world switching use cases, and two functionally aligned alternatives with documented hFE and bias resistor differences.
Technical Context
This device integrates dual on-chip base-emitter bias resistors (R1 = 2.2kΩ, R2 = 10kΩ) to eliminate external components in digital switching circuits. Its BVEBO rating of 5V enables safe operation with 3.3V/5V logic-level inputs without clamping diodes.
The transistor supports high-speed switching up to 200MHz fT and maintains stable hFE (100–600) across IC = 5mA at VCE = 5V, making it suitable for deterministic saturation in low-side load switching applications where predictable turn-on threshold and minimal base drive current are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | NPN pre-biased transistor with integrated R1/R2 |
| Collector Current (IC) | 500mA max - supports driving medium-power LEDs or relays directly |
| Emitter-Base Breakdown (BVEBO) | 5V - compatible with 3.3V/5V microcontroller GPIO without level-shifting |
| DC Current Gain (hFE) | 100–600 at IC = 5mA - ensures reliable saturation with low base current |
| Power Dissipation (PD) | 250mW - requires thermal-aware PCB layout on FR4 with recommended pad dimensions |
| Gain-Bandwidth (fT) | 200MHz - supports fast digital switching up to ~20MHz square-wave operation |
| Package | SOT23 - 3-pin surface-mount footprint compatible with standard pick-and-place and reflow |
Pinout & Package
Package: SOT23 - molded plastic, green compound (UL 94V-0), moisture sensitivity level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter connection | Reference node for bias network; tied to ground in low-side switch configuration |
| 2 (Base) | Input node for internal bias resistors | Connects to R1 (2.2kΩ) and R2 (10kΩ); accepts logic-level input directly |
| 3 (Collector) | Output current path | Drives load between VCC and collector; sinks up to 500mA when saturated |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | R1 = 2.2kΩ, R2 = 10kΩ - eliminates 2 external resistors, reducing BOM count and board area |
| AEC-Q101 readiness | Manufactured in IATF 16949-certified facilities - supports automotive qualification path with PPAP capability |
| Green RoHS compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets global environmental regulations |
| Thermal performance | RθJA = 500°C/W on FR4 - enables operation up to +125°C ambient with proper copper pour |
Applications
| Automotive Door Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Controlling interior LED status indicators in vehicle door panels using 3.3V CAN node MCU outputs. IC Role / Device Role / Timing Role: Low-side switch enabling/disabling LED current path with logic-compatible input threshold. Use Value: Eliminates discrete base resistor placement, reduces assembly cost, and ensures consistent turn-on behavior across temperature (-40°C to +125°C). | Use Scenario: Isolating fault signals from analog sensor front-ends before feeding into microcontroller interrupt pins. IC Role / Device Role / Timing Role: Digital buffer amplifier converting weak open-collector sensor alerts into robust CMOS-compatible logic levels. Use Value: Built-in pull-up resistor (R2 = 10kΩ) provides defined high state during idle, preventing floating inputs and false triggers. |
| Consumer Appliance Control Board | Medical Diagnostic Equipment |
Use Scenario: Driving buzzer activation circuitry in smart home appliances using 5V microcontroller GPIO. IC Role / Device Role / Timing Role: Saturated switch delivering 500mA peak current to piezoelectric buzzer coil. Use Value: Guaranteed hFE ≥100 at 5mA ensures full saturation with ≤50µA base drive, minimizing MCU port loading. | Use Scenario: Enabling power rails for isolated analog signal conditioning stages in portable diagnostic devices. IC Role / Device Role / Timing Role: Enable gate for LDO regulators controlling analog subsystems. Use Value: BVEBO = 5V prevents reverse-bias damage during hot-swap events; 250mW PD allows sustained enable-state operation without derating. |
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 |
|---|---|---|---|
| DDTD123YC-7-F | R1 = 2.2kΩ, R2 = 10kΩ, hFE = 56–600, same SOT23 package | Lower minimum hFE (56 vs. 100) - less margin for worst-case saturation at high temperature | Select when cost sensitivity outweighs need for guaranteed hFE ≥100 at TJ = +125°C |
| DDTB123TC-7-F | Complementary PNP version; same R1/R2 values and BVEBO rating | Used in high-side switching or push-pull configurations requiring inverted logic | Choose for bidirectional interface designs or where load must be connected to VCC instead of GND |
Compared with DDTD123YC-7-F, DDTD123TC-7-F offers higher guaranteed hFE floor (100 vs. 56), improving saturation reliability in thermally stressed environments; versus DDTB123TC-7-F, it provides non-inverted logic control ideal for direct MCU GPIO interfacing in low-side loads.
Availability
DDTD123TC-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance control boards, and medical diagnostic equipment requiring stable component supply and AEC-Q101-aligned manufacturing traceability.
Supply support for DDTD123TC-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
This part belongs to the DDTD series of pre-biased transistors, engineered specifically for space-constrained digital switching applications where reduced component count, logic-level compatibility, and automotive-grade process control are critical.
FAQ
What is the maximum allowable base-emitter reverse voltage for DDTD123TC-7-F?
The absolute maximum emitter-base reverse voltage (BVEBO) is 5V, tested at IE = 50µA. This rating permits direct connection to 3.3V or 5V logic outputs without external protection diodes, provided no transient exceeds 5V in either polarity during normal operation or ESD events.
Can DDTD123TC-7-F replace a standard NPN transistor like BC847 in a switching circuit?
Yes, but only if the circuit uses external base resistors. DDTD123TC-7-F integrates R1 = 2.2kΩ and R2 = 10kΩ, so replacing a discrete BC847 requires removing those resistors and verifying that the new bias network achieves equivalent base current and saturation voltage under worst-case VCC and temperature conditions.
Is DDTD123TC-7-F qualified to AEC-Q101?
DDTD123TC-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified, it is designated for automotive applications requiring AEC-Q101 change control - qualification testing must be performed per customer-specific requirements and test plans.
What is the thermal resistance from junction to ambient (RθJA) under standard mounting conditions?
RθJA is 500°C/W when mounted on a 1oz single-sided FR4 PCB using the recommended pad layout (C = 2.0 × 0.8 mm, X1 = 1.35 mm, Y = 0.9 mm). Derating begins above +25°C ambient, reaching zero power dissipation at +150°C junction temperature.
DDTD123TC-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):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTD123TC-7-F FAQ
1.How can I place an order for DDTD123TC-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD123TC-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 DDTD123TC-7-F reliable?
The price and inventory of DDTD123TC-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 DDTD123TC-7-F is usually 5 days.
3.What payment methods are accepted for DDTD123TC-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD123TC-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD123TC-7-F?
DDTD123TC-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD123TC-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 DDTD123TC-7-F?
For technical support, including DDTD123TC-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD123TC-7-F requirements.
6.How does Aetrix verify that DDTD123TC-7-F is sourced from the original manufacturer or authorized distributors?
All DDTD123TC-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 DDTD123TC-7-F meets industry standards.
7.What is the process for return or replacement of DDTD123TC-7-F?
All DDTD123TC-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTD123TC-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 DDTD123TC-7-F part is unused and in its original packaging.
Return procedure for DDTD123TC-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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