Taiwan Semiconductor Corporation S1JFL

Overview

S1JFL from Taiwan Semiconductor is a 1A, 600V standard surface-mount silicon rectifier diode in SOD-123FL package, featuring glass-passivated junction, low forward voltage drop (max 1.1V at 1A), and 30A peak surge current capability; used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the S1JFL datasheet, S1JFL pinout, S1JFL application, or S1JFL equivalent, key selection criteria include repetitive peak reverse voltage (600V), thermal resistance (R_θJL = 25°C/W), junction capacitance (7pF), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.

Technical Context

The S1JFL is a single-die, unidirectional silicon rectifier optimized for high-efficiency AC/DC and DC/DC conversion. Its glass-passivated junction ensures stable reverse leakage (<1µA at 25°C, <50µA at 125°C) and robust surge tolerance under 8.3ms half-sine stress.

Thermally, it delivers R_θJL = 25°C/W and R_θJA = 85°C/W in SOD-123FL, enabling reliable operation up to T_J = 150°C. Polarity is marked by cathode band; terminals are matte tin-plated per J-STD-002.

Key Specifications

Pinout & Package

Package: SOD-123FL - surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, MSL Level 1, weight ≈ 0.016g. Cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR1060 and VS-1EWH06-M3, the S1JFL offers the best balance of low V_F, industry-leading thermal resistance (R_θJL = 25°C/W), and MSL Level 1 manufacturability-making it optimal for space-constrained, thermally demanding 1A rectification where efficiency and assembly yield are prioritized.

Availability

S1JFL is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for S1JFL 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 S1JFL belongs to TSC's S1xFL standard rectifier family, engineered for high-reliability, cost-optimized AC/DC and DC/DC power conversion in space-constrained surface-mount applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S1JFL?

The S1JFL has a maximum repetitive peak reverse voltage (V_RRM) of 600 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse voltage the diode can block continuously without breakdown under normal operating conditions. The S1JFL datasheet confirms this rating applies at T_A = 25°C and is validated across its full temperature range (−55°C to +150°C). Exceeding 600 V may cause irreversible avalanche failure.

Does the S1JFL have a defined reverse recovery time (t_rr) in its datasheet?

The S1JFL datasheet does not specify a guaranteed reverse recovery time (t_rr) value in its Electrical Specifications table. However, Figure 6 shows a reverse recovery time characteristic curve and test circuit, indicating typical t_rr behavior. For design-critical high-frequency applications, engineers should refer to the curve or consider alternatives like the MUR1060 if a documented t_rr ≤ 50 ns is required. The S1JFL remains suitable for ≤100 kHz switching where soft recovery is acceptable.

What is the marking code printed on the S1JFL device body?

The S1JFL is marked with "SJF" on its device body, as confirmed in the Absolute Maximum Ratings table under "Marking code on the device." This three-character laser marking distinguishes it from the S1GFL ("SGF") and S1MFL ("SMF") variants in the same SOD-123FL family. The marking is positioned adjacent to the cathode band and follows TSC's standardized coding convention for voltage rating identification.

Is the S1JFL suitable for reflow soldering without pre-baking?

Yes, the S1JFL is rated Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life and may be subjected to standard Pb-free reflow profiles (e.g., JEDEC J-STD-020 Class 3) without prior baking. This eliminates process steps and cost in high-volume SMT lines. The S1JFL's MSL 1 status is explicitly stated in the Features section and verified in the Mechanical Data table.

How does the thermal performance of the S1JFL compare to standard SOD-123 rectifiers?

The S1JFL achieves R_θJL = 25°C/W and R_θJA = 85°C/W in the SOD-123FL package-significantly better than conventional SOD-123 rectifiers (typically R_θJA ≥ 125°C/W). This improvement stems from the FL variant's enhanced leadframe design and thermal pad exposure. As a result, the S1JFL sustains full 1A current at higher ambient temperatures, reducing need for heatsinking in compact DC-DC modules.