Taiwan Semiconductor Corporation RS2MFS

Overview

RS2MFS from Taiwan Semiconductor is a 2 A, 1000 V fast recovery surface-mount rectifier in SOD-128 package, featuring 500 ns reverse recovery time, 1.06 V forward voltage at 2 A/25°C, and 175°C maximum junction temperature. It serves as a high-voltage output rectifier in offline SMPS and DC-DC converters requiring low conduction loss and thermal robustness.

For engineers reviewing the RS2MFS datasheet, RS2MFS pinout, RS2MFS application, or RS2MFS equivalent, key selection criteria include peak reverse voltage rating (1000 V), surge current capability (140 A at 1 ms), thermal resistance (R_θJL = 16 °C/W), and SOD-128 mounting compatibility with high-density PCB layouts.

Technical Context

The RS2MFS is a single-die, glass-passivated silicon PN junction rectifier optimized for fast switching in high-frequency power conversion. Its 500 ns trr and low 10 pF junction capacitance enable efficient operation in 50–500 kHz SMPS topologies while maintaining low reverse leakage (≤1 µA at 25°C, ≤40 µA at 125°C).

Thermally, it delivers R_θJL = 16 °C/W and R_θJA = 73 °C/W on a 5 mm × 5 mm Cu pad, supporting continuous 2 A conduction up to 125°C ambient when properly heatsinked. Polarity is marked by a cathode band on the SOD-128 body.

Key Specifications

Pinout & Package

SOD-128 surface-mount package: low-profile (1.2 mm max height), matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R06 and ES2J, the RS2MFS uniquely balances 1000 V capability, moderate speed (500 ns), and superior thermal resistance (R_θJL = 16 °C/W), making it optimal for cost-sensitive, thermally demanding 100–300 kHz offline power supplies where voltage margin is critical.

Availability

RS2MFS is available at Aetrix Electronics and suitable for offline AC-DC adapters, industrial DC-DC converters, and telecom power supplies requiring stable component supply across multi-year production cycles.

Supply support for RS2MFS 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 power management and industrial markets since 1979.

The RS2MFS belongs to TSC's RS2xFS fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC power conversion in consumer, industrial, and telecom equipment.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the RS2MFS?

The RS2MFS has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, verified per Taiwan Semiconductor's C2304 datasheet revision. This rating ensures reliable operation in universal-input offline power supplies where transient overvoltages can exceed 600 V. The RS2MFS maintains this rating across its full operating temperature range (-55°C to +175°C) without derating.

Does the RS2MFS have a specified reverse recovery time (t_rr) and under what test conditions?

Yes, the RS2MFS has a typical reverse recovery time (t_rr) of 500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the official datasheet. This value is confirmed for both RS2KFS and RS2MFS variants and applies at TA = 25°C. The t_rr remains stable across temperature, supporting consistent switching behavior in thermally varied environments.

What is the forward voltage (V_F) of the RS2MFS at 2 A and 25°C?

The RS2MFS exhibits a maximum forward voltage (V_F) of 1.30 V and a typical value of 1.06 V at 2 A and 25°C, as specified in the electrical characteristics table. This V_F directly determines conduction loss-1.06 V yields ~2.12 W loss at full 2 A load-and is validated using pulse testing (PW = 0.3 ms) to avoid self-heating artifacts.

Is the RS2MFS RoHS compliant and halogen-free?

Yes, the RS2MFS is fully RoHS compliant and halogen-free, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. These compliance attributes are certified per JEDEC J-STD-609 and EU Directive 2011/65/EU, and the device carries appropriate marking per manufacturer documentation. No lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed threshold limits.

What is the thermal resistance from junction to lead (R_θJL) for the RS2MFS?

The RS2MFS has a typical junction-to-lead thermal resistance (R_θJL) of 16 °C/W, measured on a standard 5 mm × 5 mm copper pad PCB per JEDEC JESD51-14. This low R_θJL enables efficient heat transfer from the die to the PCB, allowing the RS2MFS to sustain 2 A continuous current at elevated ambient temperatures without external heatsinking in well-designed layouts.