Diodes Incorporated DSS5140V-7

Overview

DSS5140V from Diodes Incorporated is a low V_CE(SAT) PNP bipolar junction transistor in SOT-563 package, rated for -40 V V_CEO, -1 A continuous collector current, and 600 mW power dissipation at 25°C ambient. It delivers -140 mV V_CE(SAT) at I_C = -100 mA / I_B = -1 mA and supports high-speed switching with 55 ns turn-on time, commonly used in compact DC-DC converter load switches and LED current sinks.

For engineers reviewing the DSS5140V datasheet, DSS5140V pinout, DSS5140V application, or DSS5140V equivalent, key selection criteria include verified V_CE(SAT) performance across temperature, SOT-563 thermal resistance (208°C/W), h_FE stability from -55°C to +150°C, and RoHS-compliant matte tin terminations suitable for automated reflow assembly.

Technical Context

This PNP transistor uses epitaxial planar die construction to achieve low saturation voltage and stable gain over wide temperature range (-55°C to +150°C). Its complementary NPN counterpart is DSS4140V, enabling matched pair design in push-pull or H-bridge configurations.

Designed for surface-mount operation on FR-4 PCBs with minimum pad layout, it exhibits 15 pF output capacitance at -10 V V_CB, 150 MHz f_T at -10 V V_CE/ -50 mA I_C, and transient thermal resistance profile supporting pulsed operation up to 100 ms duty cycle.

Key Specifications

Pinout & Package

SOT-563 ultra-small surface-mount plastic package with 6 terminals; molded "Green" compound (UL 94V-0), matte tin-plated copper leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP transistor switching applications.

Compared with DSS5140M-7, the DSS5140V offers 21% lower thermal resistance and larger solderable pad area; versus MMBT4403-7-F, it delivers 53% lower V_CE(SAT) at mid-current, directly reducing heat generation in thermally constrained IoT nodes.

Availability

DSS5140V is available at Aetrix Electronics and suitable for DC-DC converter load switching, LED current sinking, automotive door module drivers, and IoT sensor bias control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DSS5140V 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, serving industrial, computing, consumer, and communications markets since 1959.

The DSS5140V belongs to Diodes' low-saturation-voltage PNP transistor product line, engineered specifically for high-efficiency, space-constrained power switching in automotive and portable electronics where thermal and footprint constraints dominate design trade-offs.

FAQ

What is the maximum allowable continuous collector current for DSS5140V at 85°C ambient?

At T_A = 85°C, the device's power dissipation must be derated per Fig. 1: P_D = 600 mW × (1 − (85 − 25)/208) ≈ 426 mW. With V_CE(SAT) ≈ -220 mV at I_C = -500 mA, max continuous I_C is limited to approximately -750 mA to maintain junction temperature below 150°C under typical PCB conditions.

Can DSS5140V be used in linear amplifier configurations?

No - DSS5140V is characterized and optimized for switching operation, with guaranteed parameters only for saturated and cutoff regions. Its h_FE variation across collector current (Fig. 3) and lack of small-signal linearity data (e.g., distortion, noise figure) make it unsuitable for analog amplification; use dedicated RF or audio transistors instead.

Does the SOT-563 package support hand soldering with hot air?

Yes - the SOT-563 package is compatible with hot-air rework at standard lead-free profiles (peak 245°C, 60-second exposure). Its matte tin terminations and UL 94V-0 molding compound withstand repeated thermal cycling; however, precise nozzle alignment is required due to 0.5 mm pin pitch and 0.2 mm lead thickness.

How does the DSS5140V compare to its NPN complement DSS4140V in switching speed?

DSS4140V has identical t_on (55 ns), t_off (255 ns), and f_T (150 MHz) specifications per its datasheet DS31657. Both share the same epitaxial planar die process and SOT-563 thermal profile, enabling matched timing in complementary driver stages without skew-induced shoot-through risk.