Diodes Incorporated DSS5160U-7

Overview

DSS5160U from Diodes Incorporated is a low-V_CE(SAT) PNP bipolar junction transistor in SOT-323 package, rated for -60 V V_CEO, -1 A continuous I_C, and 400 mW power dissipation at 25°C ambient. It delivers V_CE(SAT) = -175 mV at I_C = -100 mA / I_B = -1 mA and exhibits h_FE = 200 at I_C = -1 mA, supporting high-efficiency switching in compact DC-DC load control circuits.

For engineers reviewing the DSS5160U datasheet, DSS5160U pinout, DSS5160U application, or DSS5160U equivalent, key selection criteria include verified V_CE(SAT) performance at 1A, thermal resistance of 313°C/W on FR-4, SOT-323 footprint compatibility, and complementary pairing with DSS4160U for push-pull designs.

Technical Context

This PNP transistor uses epitaxial planar die construction to achieve low saturation voltage and stable gain across temperature. Its V_CE(SAT) remains ≤ -340 mV at I_C = -1 A / I_B = -100 mA, and f_T = 150 MHz enables use in medium-speed switching up to ~10 MHz.

With V_(BR)CEO = -60 V and V_(BR)CBO = -80 V, it supports robust blocking in negative-rail applications. R_CE(SAT) = 340 mΩ at full load confirms low conduction loss, while t_off = 265 ns and t_s = 230 ns indicate storage-limited turn-off behavior typical of standard BJT switching.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic case (2.10 × 1.30 × 0.90 mm), UL 94V-0 rated, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT3906LT1G and DXT3906PSQ-13, DSS5160U uniquely balances -1 A current handling, -60 V blocking, and sub-200 mV V_CE(SAT) in SOT-323-making it optimal for compact, high-reliability 12–24 V DC load switching where thermal and voltage margins are constrained.

Availability

DSS5160U-7 is available at Aetrix Electronics and suitable for LED driver circuits, portable device load switching, DC-DC converter feedback stages, and industrial sensor interfaces requiring stable component supply and RoHS-compliant packaging.

Supply support for DSS5160U-7 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 and manufacturing operations across Asia and the Americas.

The DSS5160U belongs to Diodes' low-saturation-voltage PNP transistor product line, engineered specifically for high-efficiency, space-constrained switching in portable, automotive, and industrial power management systems.

FAQ

What is the maximum allowable junction temperature for DSS5160U-7?

The DSS5160U-7 has an operating junction temperature range of -55°C to +150°C per its datasheet. At 25°C ambient, its 313°C/W thermal resistance limits safe continuous power dissipation to 400 mW. Derating is required above 25°C ambient, following the curve in Figure 1; at 85°C ambient, max power drops to ~230 mW to maintain T_J ≤ 150°C.

Is DSS5160U-7 pin-compatible with DSS4160U?

No-DSS5160U (PNP) and DSS4160U (NPN) share identical SOT-323 package dimensions and pinout order (E-B-C top view), but their polarity and biasing requirements differ fundamentally. They are complementary devices intended for paired use in push-pull or H-bridge configurations, not drop-in replacements for each other.

Does DSS5160U-7 require a heatsink in typical applications?

For continuous I_C ≤ 500 mA on standard FR-4 PCB with minimum recommended pad layout, no external heatsink is required-the 313°C/W R_θJA and 400 mW P_D rating accommodate this thermally. At full 1 A load, junction temperature rises ~313°C above ambient at 25°C, exceeding 150°C limit; thus, derating, reduced duty cycle, or enhanced copper area is mandatory.

Can DSS5160U-7 be used in linear amplifier applications?

Yes-it exhibits h_FE = 200 at I_C = -1 mA and maintains gain >100 up to -500 mA, supporting Class-A or AB linear operation. However, its f_T = 150 MHz and moderate C_obo = 15 pF make it suitable only for audio-band (<20 kHz) or low-speed signal buffering; RF or wideband applications require higher f_T devices.