Taiwan Semiconductor Corporation RS3M

Overview

RS3M from Taiwan Semiconductor is a 3A, 1000V fast recovery surface-mount rectifier in DO-214AB (SMC) package, featuring 500 ns reverse recovery time, 1.3 V max forward voltage at 3 A, and 100 A peak surge current capability. It serves as a high-voltage output rectifier in offline SMPS and DC-DC converters requiring robust transient handling.

For engineers reviewing the RS3M datasheet, RS3M pinout, RS3M application, or RS3M equivalent, key selection criteria include its 1000 V repetitive peak reverse voltage, 175 °C maximum junction temperature, thermal resistance of 15 °C/W (junction-to-lead), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The RS3M operates as a single-die, unidirectional silicon rectifier with glass-passivated junction for reliability under thermal cycling. Its 500 ns trr enables efficient operation in 50–100 kHz switching topologies, while the 100 A IFSM rating supports high-energy snubber and input rectification transients.

Designed for surface-mount assembly on FR-4 PCBs, the DO-214AB (SMC) package delivers 50 °C/W junction-to-ambient thermal resistance and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity-enabling reflow compatibility without baking.

Key Specifications

Pinout & Package

DO-214AB (SMC) package: molded plastic body with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; polarity indicated by visible cathode band on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Compared with STTH3L06S and ES3J, RS3M uniquely delivers 1000 V blocking with 500 ns recovery in DO-214AB-enabling single-part qualification across 305 VAC, 400 VAC, and 480 VAC industrial systems without redesign or layout change.

Availability

RS3M is available at Aetrix Electronics and suitable for industrial SMPS, LED drivers, and AC-DC adapters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for RS3M 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 RS3M belongs to TSC's RS3x fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC power conversion where voltage margin, thermal robustness, and assembly compatibility are critical.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for RS3M?

The RS3M has a VRRM rating of 1000 V, verified per Taiwan Semiconductor's M2304 datasheet. This allows the RS3M to safely block voltages up to 1000 V in reverse bias, making it suitable for rectifying 305 VAC mains (431 V peak) with full safety margin. The RS3M's 1000 V rating is confirmed in the Absolute Maximum Ratings table and distinguishes it from lower-voltage variants like RS3J (600 V) and RS3K (800 V).

Does RS3M have a specified reverse recovery time (trr), and how is it measured?

Yes, RS3M has a maximum reverse recovery time (trr) of 500 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the Electrical Specifications section of the M2304 datasheet. This value applies specifically to the RS3K and RS3M variants and is validated using the test circuit shown in Figure 6. The RS3M's 500 ns trr supports efficient operation in 50–100 kHz switching converters.

What package type does RS3M use, and are its leads lead-free?

RS3M uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads that are fully RoHS-compliant and lead-free, meeting J-STD-002 solderability requirements. The package features a cathode band for polarity identification and weighs approximately 0.210 g. Its dimensions and pad layout are documented in the Package Outline Dimensions section of the M2304 datasheet.

What is the maximum junction temperature (TJ max) and thermal resistance of RS3M?

The RS3M has a maximum junction temperature (TJ max) of 175 °C and a junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in the Absolute Maximum Ratings and Thermal Performance tables. These values enable reliable operation in high-ambient environments when mounted on adequately sized copper pads, with RθJA rated at 50 °C/W for standard JEDEC test board conditions.

Is RS3M suitable for use in lighting applications, and what evidence supports this?

Yes, RS3M is explicitly listed under "Applications" in the M2304 datasheet for lighting applications-including outdoor LED drivers subjected to high-line surges. Its 1000 V VRRM, 100 A IFSM, and 175 °C TJ max provide the voltage margin, surge resilience, and thermal endurance required for 305 VAC–480 VAC LED streetlight and high-bay fixtures, as confirmed in the Applications section on page 1.