Taiwan Semiconductor Corporation S2MA

Overview

S2MA from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode rated for 1000 V repetitive peak reverse voltage (V_RRM), 1.5 A average forward current (I_F), and 50 A non-repetitive surge current (I_FSM). It features glass-passivated junction, DO-214AC (SMA) package, and is used in snubber networks and DC-DC converters requiring high-voltage blocking.

For engineers reviewing the S2MA datasheet, S2MA pinout, S2MA application, or S2MA equivalent, key selection factors include its 1000 V V_RRM, 1.1 V max forward voltage at 1.5 A, 1500 ns reverse recovery time, moisture sensitivity level 1 rating, and RoHS/halogen-free compliance.

Technical Context

The S2MA operates as a single-die, unidirectional, standard recovery rectifier with a maximum junction temperature of 150 °C and thermal resistance R_θJL = 16 °C/W. Its 1500 ns reverse recovery time (trr) and 30 pF junction capacitance at 4 V bias indicate suitability for moderate-frequency switching applications-not ultrafast or RF use.

Designed for surface-mount assembly on PCBs, the S2MA uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band on the DO-214AC (SMA) molded case.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), molded epoxy case with cathode band marking; lead finish: matte tin; weight ≈ 0.060 g; UL 94V-0 rated compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar general-purpose rectifier applications.

Compared with STTH1L06S and MUR160, the S2MA provides higher voltage blocking (1000 V vs. 600 V), higher average current (1.5 A vs. 1.0 A), and surface-mount compatibility-but trades off slower recovery (1500 ns vs. ~75 ns), making it optimal for cost-sensitive, medium-frequency, high-voltage rectification rather than high-speed switching.

Availability

S2MA is available at Aetrix Electronics and suitable for DC-DC converter snubbers, industrial power supply input stages, and LED driver secondary rectification requiring stable component supply and long-term manufacturing continuity.

Supply support for S2MA 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The S2MA belongs to TSC's S2x series of general-purpose surface-mount rectifiers, designed specifically for cost-effective, reliable high-voltage rectification in space-constrained power conversion systems.

FAQ

What is the maximum repetitive peak reverse voltage rating for S2MA?

The S2MA has a maximum repetitive peak reverse voltage (V_RRM) rating of 1000 V, verified per Taiwan Semiconductor's K2102 datasheet. This rating ensures reliable blocking of reverse voltages up to 1000 V under repetitive conditions at T_J ≤ 150 °C. The S2MA is intended for applications where this high-voltage margin is required-such as universal-input AC-DC front ends or high-bus snubbers-and must not be operated beyond this limit without derating.

Does S2MA have a specified reverse recovery time, and how does it affect circuit performance?

Yes, the S2MA has a typical reverse recovery time (t_rr) of 1500 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value indicates moderate switching speed-suitable for 20–50 kHz operation in snubbers and line-frequency rectifiers-but not for >100 kHz hard-switched topologies. Using S2MA in high-frequency designs may increase switching losses and EMI due to tail current.

Is S2MA RoHS and halogen-free compliant?

Yes, the S2MA is RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. These compliance statements are confirmed in Taiwan Semiconductor's official documentation (Version K2102). The device uses matte tin-plated leads and UL 94V-0 mold compound, supporting environmentally regulated industrial and consumer product designs without restriction.

What is the thermal resistance from junction to lead (R_θJL) for S2MA, and why does it matter?

The S2MA has a junction-to-lead thermal resistance (R_θJL) of 16 °C/W, enabling efficient heat transfer from the die directly into the PCB copper via the leads. This parameter matters because it determines how much temperature rise occurs across the internal junction under steady-state conduction-critical for ensuring T_J stays within the 150 °C absolute maximum when operating at 1.5 A in compact layouts without external heatsinks.

Can S2MA be used as a direct replacement for S2KA or S2JA in an existing design?

No-S2MA is not a direct replacement for S2KA (800 V) or S2JA (600 V) without verifying layout, thermal, and voltage-margin impacts. While all share the same DO-214AC (SMA) package and pinout, the S2MA's higher 1000 V V_RRM may alter snubber energy absorption and reverse leakage behavior. System-level validation-including voltage stress analysis and thermal measurement-is required before substituting S2MA into designs originally qualified with lower-voltage variants.