Taiwan Semiconductor Corporation S1J

Overview

S1J from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode with 600 V repetitive peak reverse voltage, 1 A average forward current, and DO-214AC (SMA) package. It features low forward voltage drop (1.1 V at 1 A, 25°C), 1500 ns reverse recovery time, and operates from –55°C to +175°C junction temperature - used in DC/DC converters and snubber circuits.

For engineers reviewing the S1J datasheet, S1J pinout, S1J application, or S1J equivalent, key selection criteria include V_RRM = 600 V, I_F = 1 A, thermal resistance R_θJA = 75 °C/W, moisture sensitivity level 1, and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

The S1J is a single-die, standard-recovery silicon rectifier optimized for cost-sensitive, medium-voltage power conversion. Its 1500 ns reverse recovery time and 12 pF junction capacitance at 4 V bias indicate suitability for non-high-frequency switching applications up to ~100 kHz.

Thermal performance is defined by R_θJL = 27 °C/W and R_θJA = 75 °C/W, supporting PCB-mounted operation without forced airflow in ambient temperatures ≤ 75°C at full rated current.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR160 and VS-1N4007-M3/54, the S1J offers optimal balance of 600 V rating, surface-mount DO-214AC packaging, industry-standard thermal metrics, and full environmental compliance - making it ideal for new SMT-based industrial and lighting designs where cost, reliability, and regulatory alignment are prioritized over ultrafast recovery.

Availability

S1J is available at Aetrix Electronics and suitable for DC/DC converters, snubber circuits, and LED lighting applications requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for S1J 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 S1J belongs to TSC's S1x series of general-purpose surface-mount rectifiers, designed specifically for reliable, cost-effective AC/DC and DC/DC power conversion in space-constrained, thermally demanding environments.

FAQ

What is the maximum junction temperature rating for the S1J?

The S1J has a maximum junction temperature (T_J) rating of +175°C, with a minimum of –55°C. This wide operating range enables use in high-temperature environments such as enclosed LED drivers or industrial power supplies where ambient temperatures exceed 85°C. The S1J maintains specified electrical performance across this full range, and its thermal resistance values (R_θJA = 75 °C/W) assume proper PCB copper area for heat dissipation. Derating curves in the S1J datasheet confirm safe operation at reduced current above 75°C lead temperature.

Is the S1J RoHS and halogen-free compliant?

Yes, the S1J is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. Taiwan Semiconductor certifies that the S1J uses matte tin-plated leads and a UL 94V-0 molding compound free of brominated flame retardants and chlorine-based additives. These compliance attributes are verified in the official S1J product specification document (Version S2102) and supported by TSC's material declarations. The S1J meets environmental requirements for export to EU, China, and other regulated markets without restriction.

What does the marking code 'S1J' indicate on the device body?

The marking code 'S1J' laser-etched on the S1J device body directly identifies the part as the 600 V variant within the S1x rectifier family. Per the S1A–S1M datasheet, 'J' corresponds to V_RRM = 600 V, while 'S1' denotes the series and 'x' is the voltage suffix. This marking is consistent across all units and aligns with the ordering code S1J. No additional date codes or factory identifiers are included in the primary marking - supplementary codes (e.g., YW for date, F for factory) appear separately per TSC's marking diagram in the S1J datasheet.

Can the S1J replace the 1N4007 in existing designs?

The S1J can serve as an SMT-compatible functional replacement for the through-hole 1N4007 in many applications, but with important distinctions: both share 1 A I_F and similar V_F, but the S1J has V_RRM = 600 V (vs. 1000 V for 1N4007) and t_rr = 1500 ns (vs. ~2000–4000 ns). PCB layout must change due to DO-214AC vs. DO-41 footprint. Use the S1J only where 600 V rating suffices and SMT assembly is preferred; verify voltage stress margins before substitution in line-powered designs.

What is the moisture sensitivity level (MSL) of the S1J and how should it be handled?

The S1J has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ≤30°C/60% RH without dry-packaging or baking. No floor life limitation applies, and standard SMT reflow profiles (including lead-free) may be used without preconditioning. This MSL rating is confirmed in the "Features" section of the S1J datasheet and reflects the robustness of its glass-passivated junction and UL 94V-0 molding compound - simplifying inventory management and assembly for high-volume production.