Taiwan Semiconductor Corporation RSFJLH

Overview

RSFJLH from Taiwan Semiconductor is a 0.5A, 600V fast recovery surface-mount rectifier in Sub SMA package, featuring 250 ns reverse recovery time, 1.3 V max forward voltage at 0.5A, and AEC-Q101 qualification for automotive-grade reliability-used in DC-DC converters and snubber circuits.

For engineers reviewing the RSFJLH datasheet, RSFJLH pinout, RSFJLH application, or RSFJLH equivalent, key selection criteria include peak reverse voltage (600 V), thermal resistance (R_θJA = 150 °C/W), junction temperature range (–55 to +150 °C), and moisture sensitivity level (MSL 1).

Technical Context

The RSFJLH is a single-die, glass-passivated fast recovery rectifier optimized for high-efficiency switching applications. Its metallurgically bonded construction ensures stable operation up to 150 °C junction temperature, and its MSL 1 rating supports lead-free reflow without preconditioning.

Designed for automotive and industrial power conversion, the device delivers low reverse leakage (≤5 µA at 25 °C, ≤50 µA at 125 °C) and tight capacitance control (4 pF at 1 MHz, 4 V), enabling predictable EMI behavior in high-frequency snubber and flyback topologies.

Key Specifications

Pinout & Package

Package: Sub SMA - surface-mount, single-ended, cathode-banded case with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06U and MUR1060, the RSFJLH offers optimal balance of compact Sub SMA size, AEC-Q101 qualification, and 250 ns recovery-making it preferred for space-constrained, automotive-compliant 0.5 A rectification where MSL 1 handling and halogen-free compliance are required.

Availability

RSFJLH is available at Aetrix Electronics and suitable for automotive lighting drivers, DC-DC converter output rectification, and snubber networks requiring stable component supply, consistent AEC-Q101 compliance, and MSL 1 manufacturability.

Supply support for RSFJLH 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, specializing in power devices, rectifiers, and protection components since 1979.

The RSFJLH belongs to TSC's RSF-series fast recovery rectifier family, engineered specifically for automotive and industrial power conversion where reliability under thermal stress, fast switching, and process-controlled consistency are essential.

FAQ

What is the peak repetitive reverse voltage rating for RSFJLH?

The RSFJLH has a peak repetitive reverse voltage (V_RRM) rating of 600 V. This value is confirmed in the Absolute Maximum Ratings table on page 1 of the official Taiwan Semiconductor datasheet (Version A2103). It defines the maximum reverse voltage the device can block continuously without breakdown, making RSFJLH suitable for 48 V automotive systems with transient margin and 400 V DC-link applications. The 600 V rating is specific to RSFJLH-not shared across the entire RSF-series.

Is RSFJLH qualified for automotive applications?

Yes, RSFJLH is AEC-Q101 qualified, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. This qualification covers stress tests including HTGB, HTRB, temperature cycling, and mechanical shock-validating RSFJLH for use in automotive powertrain, body, and lighting systems. The qualification applies directly to RSFJLH; other variants like RSFALH or RSFMLH share the same qualification status per the family documentation.

What is the reverse recovery time (t_rr) of RSFJLH and how is it measured?

The reverse recovery time (t_rr) of RSFJLH is 250 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as specified in the ELECTRICAL SPECIFICATIONS table on page 2. This value is distinct from RSFALH (150 ns) and RSFMLH (500 ns), confirming variant-specific characterization. The test circuit and waveform definitions are detailed in Figure 6 of the datasheet.

Does RSFJLH have a moisture sensitivity level (MSL) rating?

Yes, RSFJLH has a moisture sensitivity level (MSL) rating of Level 1 per J-STD-020, as listed in the FEATURES section. This means the device may be stored indefinitely at ≤30 °C/60% RH and subjected to standard lead-free reflow profiles (e.g., JEDEC J-STD-020) without baking. The MSL 1 rating is confirmed for the Sub SMA package and applies specifically to RSFJLH and all RSF-xLH variants.

What is the forward voltage drop of RSFJLH at rated current?

The maximum forward voltage (V_F) of RSFJLH is 1.3 V at I_F = 0.5 A and T_J = 25 °C, per the ELECTRICAL SPECIFICATIONS table. This is a guaranteed upper limit-not a typical value-and directly impacts conduction loss and thermal design. The measurement uses a 0.3 ms pulse width (PW), as noted in the datasheet footnote, ensuring self-heating is minimized during test.