Diodes Incorporated DCX123JK-7-F

Overview

DCX123JK-7-F from Diodes Incorporated is a dual complementary pre-biased transistor in SOT26 package, integrating one NPN and one PNP transistor with built-in bias resistors R1 = 2.2 kΩ and R2 = 47 kΩ. It supports ±50 V supply voltage, delivers ±100 mA output current per section, and operates across –55 °C to +150 °C for automotive and industrial switching applications.

For engineers reviewing the DCX123JK-7-F datasheet, DCX123JK-7-F pinout, DCX123JK-7-F application, or DCX123JK-7-F equivalent, key selection criteria include input voltage thresholds (V_I(OFF) = ±0.5 V, V_I(ON) = ±1.9 V), output saturation voltage (V_CE(sat) ≤ ±0.3 V), DC current gain (h_FE = 100–600), and resistor tolerance (±30% for R1, ±20% for R2/R1 ratio).

Technical Context

This device implements a dual-channel, complementary pre-biased transistor topology with monolithic integration of two discrete transistors and their base bias networks on a single epitaxial planar die. Each channel includes dedicated R1 and R2 resistors enabling direct logic-level interface without external bias components.

The NPN section exhibits V_CE(sat) ≤ 0.3 V at I_C/I_B = 5 mA / 0.5 mA, while the PNP section achieves symmetric performance with V_CE(sat) ≥ –0.3 V under matched conditions. Both sections share identical thermal resistance (R_θJA = 417 °C/W) and power dissipation limit (P_D = 300 mW) on FR-4 PCB.

Key Specifications

Pinout & Package

SOT26 surface-mount package with molded plastic case (UL 94V-0), matte tin-plated leads, and 0.016 g mass. Dimensions: 3.00 mm × 2.80 mm × 1.10 mm (L × E × A2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DCX123JK-7-F, DCX114YK-7-F trades higher input sensitivity for lower drive strength, while DCX115EK-7-F prioritizes ultra-low bias current over output capability-making DCX123JK-7-F the optimal balance for general-purpose switching with moderate current demand.

Availability

DCX123JK-7-F is available at Aetrix Electronics and suitable for automotive lighting control, industrial I/O level shifting, and medical device motor actuation requiring stable component supply and long-term lifecycle assurance.

Supply support for DCX123JK-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.

The DCX series targets cost-sensitive, space-constrained applications needing integrated biasing-designed specifically to replace discrete transistor-resistor combinations in logic-driven switching circuits.

FAQ

What is the maximum operating temperature for DCX123JK-7-F?

The device is rated for junction temperatures from –55 °C to +150 °C, with thermal resistance R_θJA = 417 °C/W on FR-4 PCB using minimum recommended pad layout. At 100 mA output and 0.3 V saturation, power dissipation remains below 30 mW, ensuring safe operation within this range without forced cooling.

Can DCX123JK-7-F replace discrete transistors and resistors in existing designs?

Yes-it integrates one NPN and one PNP transistor with factory-trimmed R1 = 2.2 kΩ and R2 = 47 kΩ, matching typical values used in 3.3 V/5 V logic-driven switches. Pin-compatible replacement requires only re-routing B1/E1/C1 and B2/E2/C2 connections; no changes to bias network or layout area are needed.

Is DCX123JK-7-F qualified for automotive applications?

While not explicitly AEC-Q101 certified in the public datasheet, Diodes states that automotive-grade versions are available upon request with PPAP capability and IATF 16949 manufacturing. The device's –55 °C to +150 °C rating, green RoHS compliance, and epitaxial planar construction align with automotive reliability requirements.

What is the meaning of the 'K' suffix in DCX123JK-7-F?

The 'K' denotes the product family revision level per Diodes' internal documentation (DS30350 Rev. 7–2). It does not indicate packaging or temperature grade; all DCX(XXXX)K variants share the same SOT26 package, electrical specs, and thermal characteristics regardless of letter suffix.