Diodes Incorporated ADTC143ZCAQ-13

Overview

ADTC143ZCAQ-13 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated 4.7 kΩ and 47 kΩ bias resistors, AEC-Q101 qualification for automotive use, and 100 mA output current capability. It functions as a digital switch or level translator in low-power control circuits with guaranteed turn-on at ≤1.3 V input and turn-off at ≥0.5 V.

For engineers reviewing the ADTC143ZCAQ-13 datasheet, ADTC143ZCAQ-13 pinout, ADTC143ZCAQ-13 application, or ADTC143ZCAQ-13 equivalent, key selection criteria include input voltage thresholds (V_I(ON) ≤1.3 V, V_I(OFF) ≥0.5 V), DC current gain (h_FE ≥80), output saturation voltage (V_CE(SAT) ≤0.3 V @ I_O/I_L = 5 mA/0.25 mA), and AEC-Q101 compliance for automotive signal conditioning.

Technical Context

This device integrates base-emitter and base-collector bias resistors (R1 = 4.7 kΩ, R2 = 47 kΩ) to eliminate external components in digital switching applications. Its epitaxial planar construction ensures stable h_FE ≥80 at I_C = 10 mA and enables operation across –55°C to +150°C.

The transistor supports rail-to-rail input drive (–5 V to +30 V) with output current limited to 100 mA and power dissipation capped at 310 mW on FR-4 board. Its 250 MHz f_T supports moderate-speed switching up to ~10 MHz in buffered logic interfaces.

Key Specifications

Pinout & Package

SOT23 surface-mount plastic package (JEDEC TO-236AB), 3-pin configuration with 0.9 mm pitch, 2.4 mm × 1.3 mm footprint, and 1.1 mm height. Moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSV143ZMXV6T1G and DTC143ZCA-7-F, ADTC143ZCAQ-13 uniquely combines AEC-Q101 qualification, level-1 moisture sensitivity, and guaranteed 100 mA output in a fully green SOT23 package - making it the only choice for production automotive electronics requiring PPAP documentation and zero reflow risk.

Availability

ADTC143ZCAQ-13 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, consumer appliance control boards, and medical diagnostic equipment interfaces requiring stable component supply and full traceability.

Supply support for ADTC143ZCAQ-13 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.

The ADTC143ZCAQ belongs to Diodes' AEC-Q101-qualified pre-biased transistor product line, designed specifically for automotive signal switching and interface conditioning where reduced BOM count, guaranteed thresholds, and long-term reliability are critical.

FAQ

What is the maximum allowable collector-emitter voltage for ADTC143ZCAQ-13?

The absolute maximum V_CE is 50 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent breakdown. Derating is required above +25°C ambient: power dissipation must be linearly reduced by 0.77 mW/°C beyond 25°C, based on R_θJA = 403°C/W and P_D = 310 mW.

Can ADTC143ZCAQ-13 replace a standard NPN transistor like BC847 in a switching circuit?

Yes, but only if the circuit uses external base resistors and those resistors match the internal 4.7 kΩ and 47 kΩ network. Unlike BC847, ADTC143ZCAQ-13 has no accessible base terminal - input is applied between collector and emitter, and the internal resistors set fixed bias. Direct substitution requires schematic revision to remove external bias components.

Is the marking "2A9" on the SOT23 package sufficient to identify ADTC143ZCAQ-13 in production?

Yes - "2A9" is the official top-marking code for ADTC143ZCAQ, confirmed in the Diodes datasheet's Marking Information section. It is used alongside a two-character date code (e.g., "E9" for September 2017). No other Diodes pre-biased transistor shares this exact marking, ensuring unambiguous identification on automated assembly lines.

Does ADTC143ZCAQ-13 support PWM-driven loads such as LED dimming?

Yes - its 250 MHz f_T and fast switching characteristics (typical t_ON/t_OFF < 50 ns per typical curves) support PWM frequencies up to 100 kHz. However, thermal design must account for average power: at 100 mA and 0.2 V V_CE(SAT), 20 mW average dissipation is safe on standard FR-4; higher duty cycles require verification against the derating curve.