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Diodes Incorporated DDTC124TE-7-F
- Part No.:
- DDTC124TE-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-523
- Datasheet:
-
DDTC124TE-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
DDTC124TE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated 22 kΩ base bias resistor (R1 only), rated for 50 V VCEO, 100 mA IC(MAX), and 150 mW power dissipation. It delivers hFE = 100–600 at IC = 1 mA, VCE = 5 V, and VCE(sat) ≤ 0.3 V at IC/IB = 2.5 mA/0.25 mA - used in automotive LED drivers and low-power logic interface circuits.
For engineers reviewing the DDTC124TE-7-F datasheet, DDTC124TE-7-F pinout, DDTC124TE-7-F application, or DDTC124TE-7-F equivalent, key selection criteria include verified R1 tolerance (±30%), AEC-Q101 qualification, SOT523 thermal resistance (833 °C/W), and guaranteed VCE(sat) performance under defined IC/IB conditions.
Technical Context
This device implements a monolithic NPN bipolar junction transistor with a single integrated base-emitter pull-up resistor (R1 = 22 kΩ nominal), eliminating external bias components in simple switching applications. Its epitaxial planar die construction ensures stable gain and low leakage across -55°C to +150°C operating range.
The transistor operates as a digital switch with defined saturation behavior: VCE(sat) ≤ 0.3 V is guaranteed at IC/IB = 2.5 mA/0.25 mA, and hFE remains functional down to IC = 0.1 mA, supporting low-current control of LEDs, relays, and logic-level translators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - supports rail-to-rail switching in 24 V automotive and industrial control systems |
| IC(MAX) | 100 mA - sufficient for driving medium-brightness LEDs or small-signal relays |
| R1 (Nominal) | 22 kΩ ±30% - sets base current without external resistor; enables compact PCB layout |
| VCE(sat) | ≤0.3 V at IC/IB = 2.5 mA/0.25 mA - minimizes conduction loss in always-on or PWM-driven loads |
| hFE | 100–600 at IC = 1 mA, VCE = 5 V - provides robust current amplification margin for varying temperature and process |
| PD | 150 mW on FR-4 board - defines maximum continuous power handling under standard mounting |
| TJ Range | -55°C to +150°C - validated for under-hood automotive environments per AEC-Q101 |
Pinout & Package
Package: SOT523 - ultra-small surface-mount plastic case (1.60 × 1.60 × 0.55 mm), moisture sensitivity level 1, matte tin terminals, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; forms common reference for R1 bias network |
| Base (B) | Control input node | Internally connected to R1; accepts logic-level voltage to enable saturation without external resistor |
| Collector (C) | Current source output | Drives load (e.g., LED anode or relay coil) to positive supply; carries full switched current |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF 16949 manufacturing |
| R1-only bias configuration | Simplifies design by removing one external component; reduces BOM count and layout area |
| Green, halogen-free construction | Meets RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm |
| Low VCE(sat) at defined drive | Ensures predictable power loss and thermal rise when operated at IC/IB = 2.5 mA/0.25 mA |
Applications
| Automotive LED Tail Light Control | Industrial PLC Input Buffer |
|---|---|
Use Scenario: Switching 12 V LED strings in rear lighting modules with microcontroller GPIO drive. IC Role / Device Role / Timing Role: NPN pre-biased switch providing current gain and logic-level compatibility. Use Value: Eliminates need for discrete base resistor; maintains VCE(sat) ≤ 0.3 V across temperature to ensure consistent LED brightness. | Use Scenario: Level-shifting and isolating 24 V field signals to 3.3 V/5 V PLC controller inputs. IC Role / Device Role / Timing Role: Digital interface transistor translating industrial voltage levels into safe logic thresholds. Use Value: R1 tolerance (±30%) ensures reliable turn-on even with supply variation; AEC-Q101 grade supports long-term reliability in harsh cabinets. |
| Consumer Appliance Power Indicator | IoT Sensor Node Load Switch |
Use Scenario: Driving status LEDs in white-goods control panels powered from 5 V rails. IC Role / Device Role / Timing Role: Low-power saturated switch enabling direct GPIO control without current-limiting resistors. Use Value: 150 mW power rating and 833 °C/W thermal resistance allow operation at ambient up to 85°C without derating. | Use Scenario: Enabling/disabling sensor sub-circuits (e.g., analog front-end or RF module) in battery-powered edge devices. IC Role / Device Role / Timing Role: Low-quiescent-load power gate controlled by MCU sleep/wake signals. Use Value: Verified hFE ≥100 at IC = 0.1 mA ensures full saturation during deep-sleep wake-up pulses. |
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 |
|---|---|---|---|
| DDTC124TKA-7 | Same R1 = 22 kΩ, but in SOT-323 package (larger footprint, higher RθJA = 400 °C/W) | Less suitable for ultra-dense layouts; better thermal performance in high-power variants | Select when board space allows larger package and higher continuous power is needed |
| NSV12400MT1G | R1 = 22 kΩ, but hFE min = 80 (vs. 100), and not AEC-Q101 qualified | Limited to commercial-grade consumer applications; no automotive change control support | Choose for cost-sensitive non-automotive designs where qualification is not required |
Compared with DDTC124TE-7-F, DDTC124TKA-7 offers superior thermal dissipation in less space-constrained designs, while NSV12400MT1G trades automotive qualification and guaranteed hFE for lower unit cost in commercial applications.
Availability
DDTC124TE-7-F is available at Aetrix Electronics and suitable for automotive LED control, industrial PLC input buffering, and IoT sensor node power gating requiring stable component supply and long-lifecycle assurance.
Supply support for DDTC124TE-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 components for automotive, industrial, and computing markets.
This part belongs to the DDTC (R1-ONLY SERIES) E family, designed specifically for simplified, space-efficient digital switching in AEC-Q101-compliant automotive and industrial control systems.
FAQ
What is the function of the internal R1 resistor in DDTC124TE-7-F?
The internal R1 resistor (22 kΩ ±30%) connects between base and emitter, forming a built-in bias network that allows direct logic-level drive without an external base resistor. It ensures predictable turn-on behavior at IB ≈ (VIN − 0.7 V)/22 kΩ, reducing component count and PCB area in switching applications.
Is DDTC124TE-7-F suitable for 24 V industrial control applications?
Yes - its 50 V VCEO and VCBO ratings provide 2× safety margin over 24 V rails, and its -55°C to +150°C operating range supports enclosure-mounted PLC I/O modules. The AEC-Q101 qualification further validates robustness against thermal cycling and vibration encountered in factory automation environments.
How does the SOT523 package affect thermal performance?
The SOT523 package has a thermal resistance of 833 °C/W (junction-to-ambient on FR-4), limiting continuous power dissipation to 150 mW at +25°C ambient. For sustained 100 mA operation, ambient must remain below ~65°C or board copper area must be increased per Diodes' recommended pad layout to improve heat spreading.
Can DDTC124TE-7-F replace a standard NPN transistor like BC847 with an external base resistor?
Yes - it functions identically to a BC847 with a 22 kΩ base-emitter resistor, but with tighter process control on R1 tolerance and guaranteed hFE and VCE(sat) specs. Layout simplification and reduced assembly steps are primary benefits; electrical behavior matches when driven within the specified IC/IB test condition.
DDTC124TE-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- 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):
- 22 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 150 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
DDTC124TE-7-F FAQ
1.How can I place an order for DDTC124TE-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC124TE-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 DDTC124TE-7-F reliable?
The price and inventory of DDTC124TE-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 DDTC124TE-7-F is usually 5 days.
3.What payment methods are accepted for DDTC124TE-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC124TE-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC124TE-7-F?
DDTC124TE-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC124TE-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 DDTC124TE-7-F?
For technical support, including DDTC124TE-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC124TE-7-F requirements.
6.How does Aetrix verify that DDTC124TE-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC124TE-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 DDTC124TE-7-F meets industry standards.
7.What is the process for return or replacement of DDTC124TE-7-F?
All DDTC124TE-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC124TE-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 DDTC124TE-7-F part is unused and in its original packaging.
Return procedure for DDTC124TE-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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