Taiwan Semiconductor Corporation RS1DFL

Overview

RS1DFL from Taiwan Semiconductor is a 1 A, 200 V fast recovery surface-mount rectifier in SOD-123FL package, featuring 150 ns reverse recovery time, 0.91 V forward voltage at 1.0 A/25°C, and 30 A surge current rating. It serves as a primary-side output rectifier in compact DC-DC converters requiring low power loss and high thermal efficiency.

For engineers reviewing the RS1DFL datasheet, RS1DFL pinout, RS1DFL application, or RS1DFL equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, 150 ns trr performance, SOD-123FL low-profile footprint, moisture sensitivity level 1 compliance, and suitability for automated placement in space-constrained power stages.

Technical Context

The RS1DFL is a single-die, silicon planar junction fast recovery rectifier with glass passivated chip construction. Its 150 ns reverse recovery time and 0.91 V VF at 1.0 A/25°C enable efficient operation in high-frequency switching topologies up to several hundred kHz.

Thermal design is supported by R_θJL = 17°C/W and R_θJA = 84°C/W (on 5 mm × 5 mm Cu pad), while the SOD-123FL package provides polarity indication via cathode band and meets JESD201 Class 1A whisker resistance and UL 94V-0 flammability standards.

Key Specifications

Pinout & Package

SOD-123FL is a low-profile, surface-mount plastic package with two terminals: anode and cathode. Polarity is marked by a visible cathode band on the device body. The package measures 2.7 mm × 1.6 mm × 1.0 mm and weighs approximately 0.016 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR120 and VS-1EWH02-M3, RS1DFL delivers identical voltage rating and recovery speed in a smaller SOD-123FL footprint, with superior 150°C junction rating and lower VF than MUR120-making it ideal for compact, high-ambient industrial DC-DC modules.

Availability

RS1DFL is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose rectification requiring stable component supply, consistent parametric performance, and full traceability across production lots.

Supply support for RS1DFL 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 RS1DFL belongs to TSC's RS1xFL fast recovery rectifier family, engineered specifically for high-frequency, space-constrained power conversion applications where low VF, fast t_rr, and SMT manufacturability are critical.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for RS1DFL?

The RS1DFL has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2103). This rating allows safe operation in 48 V nominal bus systems with transient overvoltage margins, and is validated across the full −55°C to +150°C junction temperature range. RS1DFL must not be operated above this voltage to ensure reliable long-term blocking performance.

Does RS1DFL support lead-free reflow soldering?

Yes, RS1DFL supports lead-free reflow soldering. Its matte tin-plated leads comply with J-STD-002 for solderability, and the SOD-123FL package is rated for peak reflow temperatures up to 260°C per JEDEC J-STD-020 (MSL Level 1). No pre-bake is required due to its moisture sensitivity level 1 classification, simplifying high-volume SMT assembly for RS1DFL in commercial and industrial production lines.

What is the typical forward voltage (V_F) of RS1DFL at 1.0 A and 25°C?

The typical forward voltage (V_F) of RS1DFL is 0.91 V at 1.0 A and 25°C, with a maximum of 1.05 V under the same conditions, per the Electrical Specifications table. This value is measured using a 0.3 ms pulse width test and directly impacts conduction loss-enabling RS1DFL to dissipate only 0.91 W at full rated current, which supports thermally efficient layout in dense power modules.

Is RS1DFL RoHS and halogen-free compliant?

Yes, RS1DFL is both RoHS compliant and halogen-free. Taiwan Semiconductor certifies RS1DFL per EU Directive 2011/65/EU (RoHS) and IEC 61249-2-21 for halogen-free content. These compliance statements are documented in the Features section of the official RS1AFL–RS1MFL datasheet (Version B2103), confirming suitability for environmentally regulated end equipment including industrial automation and medical peripherals.

What is the reverse recovery time (t_rr) specification for RS1DFL?

The reverse recovery time (t_rr) for RS1DFL is specified as 150 ns maximum, tested at I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A. This parameter is explicitly listed in the Electrical Specifications table for RS1DFL and distinguishes it from higher-voltage variants (e.g., RS1JFL–RS1MFL, rated at 250 ns). The 150 ns t_rr enables efficient operation in switching power supplies operating up to 500 kHz without excessive switching loss.