Diodes Incorporated DCX51-16-13

Overview

DCX51-16-13 from Diodes Incorporated is a PNP 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 T_A = 25°C; it delivers h_FE = 100–250 at I_C = -150 mA, V_CE = -2 V, and is used in medium-power switching and linear amplification circuits in industrial power supplies and LED drivers.

For engineers reviewing the DCX51-16-13 datasheet, DCX51-16-13 pinout, DCX51-16-13 application, or DCX51-16-13 equivalent, key selection criteria include verified PNP polarity, SOT89-3L thermal performance (R_θJA = 125°C/W), guaranteed V_CE(SAT) ≤ -0.5 V at I_C = -500 mA/I_B = -50 mA, and RoHS-compliant matte tin plating on copper leadframe.

Technical Context

This PNP bipolar junction transistor operates with emitter-base forward bias and collector-base reverse bias in common-emitter configuration. Its epitaxial planar die construction ensures stable gain and low leakage, with V_(BR)EBO = -5 V and I_EBO ≤ -100 nA at V_EB = -5 V, supporting reliable turn-on control in discrete driver stages.

Designed for surface-mount automated assembly, it features moisture sensitivity level 1 per J-STD-020C and UL 94V-0 molded plastic case. Thermal derating follows Fig. 1: power dissipation drops linearly to zero at T_A = 150°C, with junction temperature limited to +150°C.

Key Specifications

Pinout & Package

Package: SOT89-3L - Surface-mount, 3-terminal plastic package with exposed collector tab for thermal enhancement; dimensions per Diodes Inc. outline drawing DS31228 Rev. 2, page 3 (L = 4.50 mm, E = 2.50 mm, H = 4.10 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZTX753 and MJD2955T4G, DCX51-16-13 uniquely balances SMT manufacturability, 125°C/W thermal resistance, and guaranteed h_FE range-making it optimal for cost-sensitive, volume-produced industrial and automotive modules requiring consistent gain and RoHS compliance.

Availability

DCX51-16-13 is available at Aetrix Electronics and suitable for industrial power supply control, LED constant-current drivers, and automotive body control modules requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for DCX51-16-13 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, Taiwan, and Malaysia.

The DCX51 series belongs to Diodes' general-purpose bipolar transistor product line, engineered specifically for medium-power switching and amplification in cost-sensitive, high-reliability industrial and automotive applications.

FAQ

What is the maximum allowable junction temperature for DCX51-16-13?

The absolute maximum junction temperature is +150°C, as specified in the Thermal Characteristics table. Operation beyond this limit risks permanent degradation of the epitaxial planar structure. Derating begins at T_A = 25°C per Fig. 1, reaching zero power at T_A = 150°C on standard FR-4 with recommended pad layout AP02001.

Is DCX51-16-13 pin-compatible with DCX54?

No-DCX51-16-13 is a PNP transistor while DCX54 is its complementary NPN counterpart. Their pinouts are reversed: DCX51-16-13 has Collector-Base-Emitter on pins 1-2-3 (top view), whereas DCX54 assigns Emitter-Base-Collector to the same physical terminals, making them functional complements but not pin-swappable.

Does DCX51-16-13 require a heatsink in typical applications?

Not under standard conditions: with Diodes Inc.'s recommended SOT89-3L pad layout (AP02001), the device dissipates up to 1 W at T_A = 25°C without external heatsinking. At ambient temperatures above 70°C or power levels exceeding 0.5 W, additional copper area or localized thermal vias are advised to maintain T_J < 125°C.

What does the "-16" suffix indicate in DCX51-16-13?

The "-16" denotes the specific h_FE gain bin: DCX51-16 guarantees h_FE = 100–250 at I_C = -150 mA and V_CE = -2 V. The "-13" suffix indicates tape-and-reel packaging (2500 units per reel), per Diodes Inc. ordering information on page 4 of DS31228 Rev. 2.