Toshiba Semiconductor and Storage SSM3J327R,LF

Overview

SSM3J327R,LF from Toshiba Electronic Devices & Storage Corporation is a silicon P-channel enhancement-mode MOSFET in SOT-23F package, rated for -20 V drain-source voltage, -3.9 A DC drain current, and 93 mΩ max R_DS(ON) at V_GS = -4.5 V. It supports 1.5-V logic-level gate drive and serves as a low-voltage power management switch in compact DC-DC converters and load switching circuits.

For engineers reviewing the SSM3J327R,LF datasheet, SSM3J327R,LF pinout, SSM3J327R,LF application, or SSM3J327R,LF equivalent, key selection criteria include verified 1.5-V gate threshold compatibility, guaranteed R_DS(ON) performance across -1.5 V to -4.5 V drive, thermal resistance of 125 °C/W on FR4, and SOT-23F footprint suitability for space-constrained PCB layouts.

Technical Context

This device operates as a single P-channel MOSFET with enhancement-mode behavior, requiring negative gate-source voltage for conduction. Its gate threshold voltage (V_th) ranges from -1.0 V to -0.3 V, enabling reliable turn-on with low-voltage controllers. The integrated body diode supports reverse-current paths in buck converters and OR-ing applications.

Designed for surface-mount use on standard FR4 boards, it delivers 1 W continuous power dissipation with channel-to-ambient thermal resistance of 125 °C/W. Dynamic parameters include 290 pF input capacitance, 32 pF reverse transfer capacitance, and 12.0 ns typical turn-on time under defined test conditions (V_GS swing 0 to -2.5 V, R_GS = 4.7 Ω).

Key Specifications

Pinout & Package

SOT-23F package: ultra-thin, lead-free, surface-mount plastic package with gull-wing leads; 0.011 g typical weight; JEDEC-compliant footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel MOSFET switching applications.

Compared with DMN2011LFG-7 and AO3401, the SSM3J327R,LF offers superior 1.5-V gate compatibility and tighter V_th upper limit (-0.3 V), making it more reliable in ultra-low-voltage control environments-critical for battery-gauge-integrated MCUs and energy-harvesting systems where gate drive headroom is constrained.

Availability

SSM3J327R,LF is available at Aetrix Electronics and suitable for battery-powered load switches, USB power controllers, and DC-DC converter synchronous rectifiers requiring stable component supply and long-term industrial availability.

Supply support for SSM3J327R,LF 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and storage solutions with emphasis on reliability, efficiency, and industrial-grade qualification.

The SSM3J327R,LF belongs to Toshiba's U-MOS series of low-voltage P-channel MOSFETs, engineered specifically for high-efficiency, space-constrained power management in portable and industrial electronics.

FAQ

What is the maximum gate-source voltage rating for the SSM3J327R,LF?

The SSM3J327R,LF has a maximum gate-source voltage (V_GSS) rating of ±8 V. Exceeding this value risks permanent gate oxide damage. Designers must ensure gate drive circuits-including pull-up/pull-down networks and level shifters-limit transient overshoot and undershoot within this range, especially during hot-swap or fast-switching events. The SSM3J327R,LF datasheet specifies this absolute maximum under all operating conditions.

Does the SSM3J327R,LF support true 1.5-V logic-level operation?

Yes, the SSM3J327R,LF supports true 1.5-V logic-level operation: its gate threshold voltage (V_th) is specified from -1.0 V to -0.3 V, and R_DS(ON) is guaranteed at 240 mΩ max with V_GS = -1.5 V. This enables direct interface with 1.5-V, 1.8-V, and 2.5-V GPIOs without external level shifting-confirmed in Toshiba's electrical characteristics table and curve Fig. 8.3 (R_DS(ON) vs. V_GS).

What is the thermal resistance of the SSM3J327R,LF on a standard PCB?

The SSM3J327R,LF has a channel-to-ambient thermal resistance (R_th(ch-a)) of 125 °C/W when mounted on a 25.4 mm × 25.4 mm × 1.6 mm FR4 board with a 645 mm² copper pad. This value is measured per JEDEC JESD51-2 and applies only to that specific board configuration; thermal performance degrades significantly on smaller pads or non-FR4 substrates. The SSM3J327R,LF datasheet explicitly defines this condition in Section 5.

Can the SSM3J327R,LF be used in reverse-biased configurations such as OR-ing circuits?

Yes, the SSM3J327R,LF can be used in OR-ing circuits due to its integrated body diode with V_DSF ≤1.2 V at 3.9 A. When configured as a high-side switch with source tied to the higher-potential rail, the body diode conducts reverse current during fault or standby states. However, designers must ensure gate control prevents unintended conduction during diode conduction phases-verified in the SSM3J327R,LF source-drain characteristics section (Section 6.5).

Is the SSM3J327R,LF RoHS compliant and lead-free?

Yes, the SSM3J327R,LF is RoHS compliant and lead-free. Toshiba confirms this in its environmental compliance documentation and product marking specifications. The ",LF" suffix denotes lead-free termination, and the device meets EU RoHS Directive 2011/65/EU requirements. Full material declarations and test reports for the SSM3J327R,LF are available through Toshiba's official environmental portal.