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Diodes Incorporated DDTC125TE-7
- Part No.:
- DDTC125TE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC125TE-7.pdf
- Description:
- TRANS PREBIAS NPN 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:5,897
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Product details
Overview
DDTC125TE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated 200 kΩ base bias resistor (R1 only), rated for 50 V VCEO, 100 mA IC(MAX), and 150 mW power dissipation; used in compact logic-level switching and signal conditioning circuits in automotive body control modules and industrial sensor interfaces.
For engineers reviewing the DDTC125TE-7 datasheet, DDTC125TE-7 pinout, DDTC125TE-7 application, or DDTC125TE-7 equivalent, key selection criteria include verified R1 tolerance (±30%), hFE range (100–600 at IC = 1 mA), VCE(sat) ≤ 0.3 V, AEC-Q101 qualification status, and SOT523 thermal resistance (833 °C/W).
Technical Context
This device implements a single-NPN transistor with monolithic integration of a precision 200 kΩ base pull-up resistor (R1), eliminating external bias components. It operates as a digital switch with guaranteed saturation under IC/IB = 0.5 mA/0.05 mA test condition and supports ambient temperatures from –55 °C to +150 °C.
The SOT523 package enables high-density PCB layouts with 0.002 g mass and UL 94V-0 flammability rating. Its epitaxial planar die construction ensures stable gain-bandwidth product (fT = 250 MHz) and low leakage (ICBO, IEBO ≤ 0.5 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 24 V automotive and 3.3/5 V logic interface applications. |
| IC(MAX) | 100 mA - Continuous collector current limit; supports driving small relays, LEDs, or logic gates without external current limiting. |
| R1 (Nominal) | 200 kΩ - Integrated base bias resistor value; sets input impedance and enables direct microcontroller GPIO drive without discrete resistor. |
| hFE | 100–600 - DC current gain at IC = 1 mA, VCE = 5 V; ensures reliable on/off switching across process and temperature variation. |
| VCE(sat) | ≤ 0.3 V - Saturation voltage at IC/IB = 0.5 mA/0.05 mA; minimizes power loss and self-heating in always-on or pulsed switching modes. |
| RθJA | 833 °C/W - Junction-to-ambient thermal resistance on FR-4 board; informs derating requirements above 25 °C ambient. |
| fT | 250 MHz - Gain-bandwidth product; supports fast edge transitions in digital signal routing up to ~10–20 MHz toggle rates. |
Pinout & Package
SOT523 is a 3-pin ultra-small surface-mount plastic package (1.60 × 1.60 × 0.55 mm) with matte tin terminals, moisture sensitivity level 1, and UL 94V-0 flammability rating. Weight is 0.002 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for current flow; connected to ground or low-side return path in common-emitter switch configuration. |
| 2 (Base) | Base terminal | Input node tied internally to R1; accepts logic-level voltage (e.g., 3.3 V) to enable controlled turn-on without external bias network. |
| 3 (Collector) | Collector terminal | Output node carrying switched load current; routed to VCC-side loads such as LED anodes or relay coils. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 200 kΩ ±30% - Eliminates need for external base resistor, reducing BOM count and PCB area in space-constrained designs. |
| AEC-Q101 qualification | Qualified for automotive applications - Enables use in body electronics, lighting controls, and HVAC subsystems requiring PPAP documentation and IATF 16949 manufacturing. |
| Green compound packaging | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - Meets global environmental compliance mandates including RoHS 3 and ELV directives. |
| Low thermal resistance | RθJA = 833 °C/W - Allows operation at elevated ambient temperatures when mounted per recommended FR-4 pad layout. |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Controlling window lift motor enable signals and door lock actuator drivers in vehicle body control units. IC Role / Device Role / Timing Role: NPN pre-biased switch translating 3.3 V MCU GPIO outputs into 12 V/24 V load control paths. Use Value: Reduces component count by integrating R1, improves reliability over discrete resistor-transistor pairs, and meets AEC-Q101 stress test requirements. | Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor-based temperature monitors) before ADC input stages. IC Role / Device Role / Timing Role: Active pull-up/pull-down element providing clean digital thresholds and noise immunity in noisy factory environments. Use Value: Stable hFE and low VCE(sat) ensure consistent switching behavior across –40 °C to +125 °C operating range. |
| Consumer Appliance Control Logic | Medical Diagnostic Equipment Interface |
Use Scenario: Driving indicator LEDs and solenoid valves in smart washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-power digital output stage interfacing between microcontrollers and higher-current peripherals. Use Value: 150 mW power rating and SOT523 footprint support dense multi-channel control boards with minimal thermal impact. | Use Scenario: Isolating and conditioning patient-monitoring sensor signals (e.g., pulse oximetry LED drivers) in Class II medical devices. IC Role / Device Role / Timing Role: Safe, low-leakage switching element ensuring signal integrity and meeting IEC 60601 creepage/clearance constraints via compact SOT523 isolation. Use Value: Verified ICBO/IEBO ≤ 0.5 µA prevents false triggering in high-impedance analog front-ends. |
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 |
|---|---|---|---|
| DDTC124TE-7-F | R1 = 22 kΩ (vs. 200 kΩ); hFE min 100 at IC = 2.5 mA | Better suited for higher-drive applications requiring >5 mA IC; less sensitive to weak GPIO drive strength | Select when driving loads >10 mA or using 1.8 V logic; avoid if input voltage is marginal or source impedance high. |
| NSVD12500MT1G | R1 = 220 kΩ; AEC-Q101 qualified; VCEO = 50 V; same SOT-523 package | Drop-in replacement with tighter R1 tolerance (±20%) and extended temp range (–65 °C to +175 °C) | Preferred for new designs requiring enhanced long-term stability or extended temperature coverage beyond +150 °C. |
Compared with DDTC125TE-7, DDTC124TE-7-F offers lower R1 for stronger base drive but reduced input impedance, while NSVD12500MT1G provides tighter resistor tolerance and broader temperature capability-both retain identical pinout and mechanical compatibility.
Availability
DDTC125TE-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance control logic, and medical diagnostic equipment requiring stable component supply and legacy design continuity.
Supply support for DDTC125TE-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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DDTC (R1-ONLY SERIES) E product line delivers pre-biased transistors optimized for cost-sensitive, space-constrained digital switching applications where simplified biasing and AEC-Q101 compliance are critical.
FAQ
Is DDTC125TE-7 still in active production?
No-DDTC125TE-7-F is marked "Obsolete" in Diodes' official ordering information. However, Aetrix Electronics maintains legacy inventory and offers last-time-buy support, including full traceability, lot-specific data, and extended lifecycle coordination for ongoing production programs.
What is the exact R1 resistor value and tolerance for DDTC125TE-7?
The integrated base bias resistor R1 is 200 kΩ with a tolerance of ±30%, as confirmed in the DS30315 Rev. 11–2 datasheet Electrical Characteristics table under "Input Resistor (R1) Tolerance." This applies across the full operating temperature range.
Can DDTC125TE-7 replace a standard 2N3904 with external base resistor?
Yes-when configured as a common-emitter switch with emitter grounded, DDTC125TE-7 replaces 2N3904 + 200 kΩ base resistor. Its built-in R1 simplifies layout and improves consistency, though VCE(sat) and hFE must be validated for the specific IC and VCE conditions in the target circuit.
Does DDTC125TE-7 meet automotive qualification standards?
Yes-the DDTC (R1-ONLY SERIES) E family, including DDTC125TE-7, is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities, making it suitable for automotive body electronics, lighting, and comfort systems per Diodes' product definitions page.
DDTC125TE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
DDTC125TE-7 FAQ
1.How can I place an order for DDTC125TE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC125TE-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 DDTC125TE-7 reliable?
The price and inventory of DDTC125TE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC125TE-7 is usually 5 days.
3.What payment methods are accepted for DDTC125TE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC125TE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC125TE-7?
DDTC125TE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC125TE-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 DDTC125TE-7?
For technical support, including DDTC125TE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC125TE-7 requirements.
6.How does Aetrix verify that DDTC125TE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC125TE-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 DDTC125TE-7 meets industry standards.
7.What is the process for return or replacement of DDTC125TE-7?
All DDTC125TE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC125TE-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 DDTC125TE-7 part is unused and in its original packaging.
Return procedure for DDTC125TE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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