Diodes Incorporated DSS9110Y-7

Overview

DSS9110Y-7 from Diodes Incorporated is a PNP bipolar junction transistor in SOT-363 package, rated for -100 V V_CEO, -1 A continuous collector current, and ultra-low -320 mV V_CE(sat) at I_C = -1 A / I_B = -100 mA. It serves as a low-power switching and amplification device in compact DC-DC converters, LED drivers, and load-switching circuits.

For engineers reviewing the DSS9110Y-7 datasheet, DSS9110Y-7 pinout, DSS9110Y-7 application, or DSS9110Y-7 equivalent, key selection criteria include its low saturation voltage, 150–450 h_FE gain range across operating currents, SOT-363 footprint compatibility, and -55°C to +150°C junction temperature rating.

Technical Context

This PNP transistor uses epitaxial planar die construction to achieve stable gain and low saturation voltage across wide temperature ranges. Its complementary NPN counterpart is DSS8110Y, enabling matched pair design in push-pull or differential configurations.

Rated for -120 V V_CBO and -5 V V_EBO, it supports robust blocking in high-side switch topologies. The 100 MHz f_T and sub-200 ns switching times (t_r = 230 ns, t_f = 160 ns) confirm suitability for medium-speed digital and analog signal control.

Key Specifications

Pinout & Package

Package: SOT-363 (SC-70-6), ultra-small surface-mount plastic case with matte tin-plated Alloy 42 leadframe; UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT3906LT1G and DXT3906PSQ-13, DSS9110Y-7 delivers superior voltage headroom (-100 V), lower conduction loss at full load, and guaranteed high h_FE - making it the optimal choice for 48 V industrial switching and thermally constrained designs.

Availability

DSS9110Y-7 is available at Aetrix Electronics and suitable for LED drivers, high-side load switches, DC-DC feedback circuits, and industrial I/O protection requiring stable component supply and long-term manufacturability.

Supply support for DSS9110Y-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.

DSS9110Y-7 belongs to Diodes' general-purpose bipolar transistor product line, engineered specifically for space-efficient, low-loss switching in industrial, computing, and consumer power management systems.

FAQ

What is the maximum safe operating junction temperature for DSS9110Y-7?

The absolute maximum junction temperature is +150°C, and the device is characterized across -55°C to +150°C. Derating begins at +25°C ambient per the 200°C/W R_θJA curve; full 625 mW power dissipation requires minimum pad layout per datasheet Figure 5.

Is DSS9110Y-7 pin-compatible with standard SOT-363 PNP transistors like MMBT3906?

No - DSS9110Y-7 uses a monolithic dual-emitter/dual-base/dual-collector die in SOT-363, with internal connections between Pins 1&4, 2&5, and 3&6. Standard MMBT3906 in SOT-363 has independent pins; direct replacement requires schematic and layout revision.

Does DSS9110Y-7 require a base resistor in switching applications?

Yes - a series base resistor is mandatory to limit I_B and ensure saturation. For I_C = -1 A and h_FE = 150, minimum I_B = 6.7 mA is required; with V_BE(sat) ≈ -1.1 V, a 470 Ω resistor is typical for 3.3 V drive.

Can DSS9110Y-7 be used in linear amplification mode?

Yes - its h_FE variation is specified from 1 mA to 1 A, and f_T = 100 MHz supports small-signal amplification up to ~10 MHz. However, thermal limitations (625 mW PD) restrict usable quiescent current in Class-A stages to ≤100 mA for stable biasing.