Diodes Incorporated ADTC114EUAQ-7

Overview

ADTC114EUAQ from Diodes Incorporated is an AEC-Q101-qualified NPN pre-biased small-signal transistor in SOT323 package, featuring integrated 10 kΩ base-emitter and base-collector bias resistors, 50 V V_CC, 100 mA I_C(max), and 250 MHz f_T, designed for automotive signal switching in body control modules and lighting drivers.

For engineers reviewing the ADTC114EUAQ datasheet, ADTC114EUAQ pinout, ADTC114EUAQ application, or ADTC114EUAQ equivalent, key selection criteria include its dual 10 kΩ internal bias network, guaranteed h_FE ≥30 at 5 mA, ±30% R1 tolerance, -55°C to +150°C operating range, and RoHS-compliant "Green" construction.

Technical Context

This device integrates two precision-matched on-die resistors (R1 = R2 = 10 kΩ nominal) to configure a digital NPN switch with defined turn-on/off thresholds-V_I(ON) ≤ 3.0 V and V_I(OFF) ≥ 0.5 V-enabling direct interface with 3.3 V/5 V logic without external bias components.

Its epitaxial planar die construction ensures stable DC current gain (h_FE ≥30 at I_C = 5 mA, V_CE = 5 V) and low saturation voltage (V_CE(SAT) ≤ 0.3 V at I_C/I_B = 10 mA/0.5 mA), supporting reliable low-power load switching in space-constrained automotive PCBs.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic case (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, 0.006 g weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN pre-biased transistor applications.

Compared with NSV114EUAQ and DDTA114ECA-7, ADTC114EUAQ uniquely delivers full AEC-Q101 qualification, 150°C junction rating, and optimized thermal resistance (375°C/W) - making it the sole choice for safety-critical automotive switching where long-term reliability under thermal stress is non-negotiable.

Availability

ADTC114EUAQ is available at Aetrix Electronics and suitable for automotive body control, LED lighting, engine bay sensor interfaces, and climate control fan stages requiring stable component supply across extended product lifecycles.

Supply support for ADTC114EUAQ 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, automotive-qualified components with broad distribution and design-in support.

This part belongs to Diodes' Automotive Pre-Biased Transistor (PBT) product line, engineered specifically for reducing design complexity and improving robustness in 12 V/24 V vehicle subsystems.

FAQ

What is the function of the internal 10 kΩ resistors in ADTC114EUAQ?

The internal R1 (base-emitter) and R2 (base-collector) resistors configure the transistor as a ready-to-use digital switch. R1 pulls the base to emitter to ensure turn-off when input is low; R2 provides base drive current when input is high-eliminating need for external bias components and ensuring consistent logic-level compatibility.

Can ADTC114EUAQ replace a standard NPN transistor like BC847 in automotive designs?

No-it is not a drop-in replacement for discrete transistors. ADTC114EUAQ integrates fixed bias resistors and is optimized for logic-driven switching, whereas BC847 requires external biasing. Substitution would require circuit redesign to remove external resistors and verify input/output voltage thresholds match system logic levels.

Is the SOT323 package compatible with standard reflow profiles?

Yes-SOT323 is JEDEC-compliant and rated for moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ≤30°C/85% RH and processed using standard lead-free reflow profiles (peak 260°C) without baking or special handling.

Does ADTC114EUAQ support PWM operation for LED dimming?

Yes-its 250 MHz f_T and ≤0.3 V V_CE(SAT) enable clean switching at PWM frequencies up to 10 kHz. At 5 mA I_C, switching times are typically <100 ns, minimizing distortion and thermal buildup during high-duty-cycle dimming.