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Diodes Incorporated ADTC144WCAQ-7
- Part No.:
- ADTC144WCAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADTC144WCAQ-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,742
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Product details
Overview
ADTC144WCAQ-7 from Diodes Incorporated is an AEC-Q101-qualified NPN pre-biased small-signal transistor in SOT23 package, featuring built-in bias resistors R1 = 47 kΩ and R2 = 22 kΩ (R1 ≠ R2), VCEO = 50 V, IC(max) = 100 mA, and DC current gain (hFE) ≥ 56 at IC = 5 mA - used for automotive logic-level signal switching in body control modules.
For engineers reviewing the ADTC144WCAQ-7 datasheet, ADTC144WCAQ-7 pinout, ADTC144WCAQ-7 application, or ADTC144WCAQ-7 equivalent, key selection criteria include input voltage thresholds (VIN(OFF) ≤ 0.8 V, VIN(ON) ≥ 4 V), guaranteed low VCE(SAT) ≤ 0.3 V at IO/IIN = 10 mA/0.5 mA, and automotive-grade reliability with PPAP capability.
Technical Context
This device integrates a monolithic NPN transistor with two non-matching on-chip base bias resistors (R1 = 47 kΩ, R2 = 22 kΩ), enabling single-resistor-input logic-level interface without external bias network. It operates as a digital switch with defined turn-on/turn-off voltage thresholds and supports rail-to-rail input drive from 0 V to 40 V.
The SOT23 package delivers thermal resistance RθJA = 403 °C/W on FR-4 board, and its AEC-Q101 qualification confirms suitability for automotive ambient temperatures from −55 °C to +150 °C with full traceability and PPAP documentation support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - maximum collector-emitter voltage before breakdown; enables use in 24 V automotive systems with margin. |
| IC(max) | 100 mA - absolute max continuous collector current; supports medium-drive loads like LED indicators or small relays. |
| hFE | ≥56 at IC = 5 mA - ensures reliable saturation under typical logic-driven switching conditions. |
| VCE(SAT) | 0.1–0.3 V at IO/IIN = 10 mA/0.5 mA - guarantees low conduction loss and minimal self-heating in active switching. |
| VIN(OFF)/VIN(ON) | ≤0.8 V / ≥4 V - provides noise-immune digital threshold behavior compatible with 3.3 V and 5 V CMOS/TTL logic families. |
| R1 / R2 | 47 kΩ / 22 kΩ - asymmetric internal bias network enabling stable DC operating point without external components. |
| PD | 310 mW - maximum power dissipation on standard FR-4 PCB; defines thermal derating envelope up to +125 °C ambient. |
Pinout & Package
SOT23 surface-mount plastic package (JEDEC TO-236AB), 0.008 g weight, UL 94V-0 rated molding compound, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for current sink operation; connected internally to R2 and external load return path. |
| 2 (Base) | Input node | Direct connection to internal R1–R2 divider junction; accepts logic-level voltage input (0–40 V). |
| 3 (Collector) | Output node | Switched high-side output; drives load between VCC and collector with controlled saturation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, lighting, and body electronics with full PPAP support. |
| Asymmetric bias resistors (R1 ≠ R2) | Enables precise input threshold control and stable DC bias without external resistor network or trimming. |
| Lead-free & halogen-free "Green" construction | Meets RoHS 2 (2011/65/EU) and automotive environmental compliance requirements with <900 ppm Br/Cl and <1000 ppm Sb. |
| Low VCE(SAT) at rated current | Ensures <300 mV drop at 10 mA output, minimizing power loss and thermal stress in space-constrained PCB layouts. |
Applications
| Automotive Door Module Switching | LED Indicator Driver |
|---|---|
Use Scenario: Controlling window lock/unlock solenoids and mirror position actuators via microcontroller GPIO in door control units. IC Role / Device Role / Timing Role: NPN pre-biased switch translating 3.3 V logic signals into 12 V/24 V load drive with noise immunity. Use Value: Eliminates need for discrete base resistor, reduces BOM count by one component, and ensures consistent turn-on at ≥4 V across temperature. | Use Scenario: Driving status LEDs on instrument clusters and center consoles where current must be limited and switched cleanly. IC Role / Device Role / Timing Role: Constant-current switch with fixed gain and low saturation voltage for predictable LED brightness control. Use Value: Delivers stable 10–20 mA LED current with <0.3 V drop, reducing heat generation and improving power efficiency over discrete alternatives. |
| Body Control Unit (BCU) Input Conditioning | Smart Fuse Monitoring Interface |
Use Scenario: Level-shifting and debouncing mechanical switch inputs (e.g., seat position sensors, trunk release) before MCU sampling. IC Role / Device Role / Timing Role: Digital buffer with hysteresis-like behavior due to defined VIN(OFF)/VIN(ON) thresholds. Use Value: Rejects contact bounce and EMI transients below 0.8 V while reliably detecting valid closure above 4 V. | Use Scenario: Isolating and conditioning fault-sense signals from smart power distribution units in 48 V mild-hybrid architectures. IC Role / Device Role / Timing Role: High-voltage-tolerant input stage converting sensed current pulses into clean logic-compatible signals. Use Value: Withstands 50 V VCEO and −10 V to +40 V input range, enabling direct interface to shunt-based current monitoring circuits. |
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 |
|---|---|---|---|
| NSV144WMT1G | R1 = R2 = 47 kΩ (symmetric); lower hFE min = 35; same SOT23 package and AEC-Q101 rating. | Less precise input threshold control; suitable for generic switching but not for noise-sensitive edge detection. | Select when cost optimization outweighs need for asymmetric bias and tighter VIN thresholds. |
| DTC144ECA-7-F | Non-automotive grade; no AEC-Q101 qualification; identical R1/R2 values and electrical specs otherwise. | Not approved for production automotive use; limited to industrial or consumer prototyping. | Choose only for non-automotive designs requiring identical functionality without PPAP or extended temperature validation. |
Compared with NSV144WMT1G and DTC144ECA-7-F, ADTC144WCAQ-7 uniquely combines asymmetric bias (R1 ≠ R2), guaranteed 0.8 V/4 V input thresholds, and full AEC-Q101 compliance - making it the only option qualified for safety-critical automotive signal conditioning where input noise immunity and supply-chain traceability are mandatory.
Availability
ADTC144WCAQ-7 is available at Aetrix Electronics and suitable for automotive body electronics, LED driver circuits, smart fuse interfaces, and BCU input conditioning requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for ADTC144WCAQ-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.
This part belongs to Diodes' Automotive-Grade Pre-Biased Transistor (PBT) product line, designed specifically to replace discrete transistor + resistor combinations in vehicle electronics with validated reliability, reduced layout area, and simplified qualification.
FAQ
What is the function of the internal R1 and R2 resistors in ADTC144WCAQ-7?
The internal R1 (47 kΩ) and R2 (22 kΩ) form an asymmetric voltage divider that biases the NPN transistor's base, enabling direct logic-level input drive without external components. R1 connects between pin 2 (base) and VIN, while R2 connects between pin 2 and emitter (pin 1), establishing a stable DC operating point and defining precise turn-on/turn-off voltage thresholds.
Can ADTC144WCAQ-7 be used in 48 V automotive systems?
ADTC144WCAQ-7 has VCEO = 50 V, making it suitable for 48 V nominal systems under normal operating conditions. However, transient voltage spikes exceeding 50 V (e.g., load dump) require external clamping protection, as the device is not rated for sustained operation above its absolute maximum collector-emitter voltage.
How does the AEC-Q101 qualification impact design validation?
AEC-Q101 qualification means ADTC144WCAQ-7 has passed accelerated stress tests for temperature cycling, humidity, HTRB, and ESD - confirming robustness for automotive under-hood and cabin environments. This eliminates the need for customer-level reliability requalification and supports PPAP submission with full test reports and lot traceability.
Is the SOT23 footprint compatible with standard pick-and-place equipment?
Yes - the SOT23 package (JEDEC TO-236AB) uses standardized dimensions (2.90 mm × 1.30 mm × 1.03 mm) and lead pitch (0.95 mm), fully supported by industry-standard SMT assembly lines. The recommended pad layout (2.0 mm × 0.8 mm copper pads with 1.35 mm center spacing) ensures reliable solder joint formation and thermal performance.
ADTC144WCAQ-7 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):
- 47 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:
- 310 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADTC144WCAQ-7 FAQ
1.How can I place an order for ADTC144WCAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADTC144WCAQ-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 ADTC144WCAQ-7 reliable?
The price and inventory of ADTC144WCAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTC144WCAQ-7 is usually 5 days.
3.What payment methods are accepted for ADTC144WCAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTC144WCAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADTC144WCAQ-7?
ADTC144WCAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADTC144WCAQ-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 ADTC144WCAQ-7?
For technical support, including ADTC144WCAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTC144WCAQ-7 requirements.
6.How does Aetrix verify that ADTC144WCAQ-7 is sourced from the original manufacturer or authorized distributors?
All ADTC144WCAQ-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 ADTC144WCAQ-7 meets industry standards.
7.What is the process for return or replacement of ADTC144WCAQ-7?
All ADTC144WCAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with ADTC144WCAQ-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 ADTC144WCAQ-7 part is unused and in its original packaging.
Return procedure for ADTC144WCAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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