Diodes Incorporated DCX54-13

Overview

DCX54-13 from Diodes Incorporated is an NPN epitaxial planar silicon transistor in SOT89-3L package, rated for 45 V V_CEO, 1 A continuous collector current, and 1 W power dissipation at 25°C ambient - designed for medium-power switching and linear amplification in industrial power supplies and motor control stages.

For engineers reviewing the DCX54-13 datasheet, DCX54-13 pinout, DCX54-13 application, or DCX54-13 equivalent, key selection criteria include its 100–250 h_FE range at 150 mA, 0.5 V V_CE(SAT) at 500 mA/50 mA drive, 200 MHz f_T, and RoHS-compliant lead-free matte tin plating on copper leadframe.

Technical Context

This discrete NPN bipolar junction transistor operates with a maximum junction temperature of +150°C and features low thermal resistance (R_θJA = 125°C/W) when mounted on FR-4 PCB per AP02001 layout. Its V_BE(ON) of 1.0 V at 500 mA enables efficient base drive in low-voltage logic-controlled switches.

The device exhibits pulsed-rated breakdown voltages (V_(BR)CBO = 45 V, V_(BR)CEO = 45 V) and tight leakage specs: ICBO ≤ 100 nA at 30 V and 25°C, supporting stable operation in temperature-variable environments up to +150°C storage.

Key Specifications

Pinout & Package

Package: SOT89-3L - surface-mount plastic case with molded "Green" compound (UL 94V-0), 0.072 g mass, moisture sensitivity level 1, and matte tin-plated copper leadframe.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power switching applications.

Compared with ZTX653 and MJD122, DCX54-13 offers optimal balance of 45 V rating, 100–250 h_FE spread, and SOT89-3L thermal efficiency - making it preferred for space-constrained 24–36 V industrial switching where gain stability and RoHS compliance are critical.

Availability

DCX54-13 is available at Aetrix Electronics and suitable for industrial power supplies, DC motor drivers, linear regulators, and signal amplifiers requiring stable component supply and RoHS-compliant manufacturing.

Supply support for DCX54-13 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Malaysia, and Taiwan.

The DCX54 series belongs to Diodes' general-purpose bipolar transistor product line, engineered specifically for cost-sensitive, medium-power industrial switching and amplification where reliability, thermal performance, and lead-free compliance are mandatory.

FAQ

What is the maximum allowable junction temperature for DCX54-13?

The absolute maximum junction temperature (T_j) is +150°C, as specified in the Thermal Characteristics table. Operation beyond this limit risks permanent degradation of the epitaxial base-emitter junction. Derating curves in Figure 1 show power dissipation must be reduced linearly above 25°C ambient to maintain T_j ≤ 150°C.

Can DCX54-13 be used in linear amplifier configurations?

Yes - its 200 MHz f_T, low output capacitance (15 pF), and stable h_FE across 1–150 mA make it suitable for Class-A or AB small-signal amplification up to ~30 MHz. Biasing must ensure V_CE remains ≥2 V and power dissipation stays within 1 W derated for ambient temperature.

Is the exposed collector tab electrically isolated?

No - the metal tab is internally connected to the collector terminal (Pin 1). It must not be shorted to ground or other potentials unless the collector node is referenced to that potential. PCB copper pads under the tab serve only thermal functions and must be routed as part of the collector net.

How does DCX54-13 differ from DCX54-16?

DCX54-13 and DCX54-16 share identical electrical specs and package, differing only in tape-and-reel packaging: DCX54-13 ships in 2500-unit reels, while DCX54-16-13 denotes the same device with date-code marking per Diodes' standard format (YWW). No parametric or functional distinction exists between them.