Taiwan Semiconductor Corporation RS3J

Overview

RS3J from Taiwan Semiconductor is a fast recovery surface-mount rectifier diode with 600 V repetitive peak reverse voltage (VRRM), 3 A average forward current (IF), and 250 ns reverse recovery time (trr) at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A. It features glass passivated junction, DO-214AB (SMC) package, and is used in switching-mode power supplies and snubber circuits.

For engineers reviewing the RS3J datasheet, RS3J pinout, RS3J application, or RS3J equivalent, key selection factors include its 600 V VRRM rating, 100 A non-repetitive surge capability (IFSM), 175 °C max junction temperature, thermal resistance (RθJL = 15 °C/W), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The RS3J operates as a single-die, unidirectional fast recovery rectifier optimized for high-frequency switching applications. Its 250 ns trr enables reduced switching losses in DC–DC converters and inverters, while the glass-passivated junction ensures stable performance under thermal cycling and humidity exposure.

Rated for TJ = –55 °C to +175 °C and moisture sensitivity level 1 (per J-STD-020), the RS3J supports reflow soldering without preconditioning. Its DO-214AB (SMC) package provides mechanical robustness and thermal dissipation suitable for automated placement in high-volume power supply assembly.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band. Matte tin-plated leads, J-STD-002 solderable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06S and ES3J, the RS3J offers balanced trade-offs: moderate trr (250 ns) with low VF (≤1.3 V) and proven ruggedness in industrial snubbers and converters-ideal for cost-sensitive, thermally constrained designs requiring reliability over extreme speed.

Availability

RS3J is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and LED drivers requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for RS3J 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 rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The RS3J belongs to TSC's RS3x fast recovery rectifier family, designed specifically for high-efficiency, surface-mount power conversion in space-constrained and thermally demanding applications such as adapters, lighting, and motor controls.

FAQ

What is the maximum junction temperature rating for RS3J?

The RS3J has a maximum junction temperature (TJ) rating of +175 °C, enabling reliable operation in high-ambient environments such as enclosed LED drivers or industrial power supplies. This rating is validated per JEDEC test conditions and allows derating curves to be applied for thermal design. The RS3J maintains stable electrical parameters up to this limit, supporting extended lifetime in thermally aggressive applications.

Does RS3J have a halogen-free and RoHS-compliant construction?

Yes, the RS3J is both halogen-free and RoHS compliant, meeting EU Directive 2011/65/EU and IPC-4101D requirements. The molding compound, lead finish (matte tin), and internal die materials are certified free of brominated flame retardants, chlorine, and restricted heavy metals. This compliance is documented in Taiwan Semiconductor's material declarations and supports green manufacturing initiatives for the RS3J.

What is the reverse recovery time (trr) specification for RS3J and under what test conditions?

The RS3J has a reverse recovery time (trr) of 250 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per JEDEC Test Method JESD24-14. This value is confirmed in the official Taiwan Semiconductor M2304 datasheet and reflects typical performance at TA = 25 °C. The RS3J's trr remains stable across its rated temperature range, making it suitable for fixed-frequency and resonant converter topologies.

Is RS3J compatible with lead-free reflow soldering processes?

Yes, the RS3J is fully compatible with lead-free reflow soldering per J-STD-020 Class 1 (MSL Level 1), requiring no pre-baking. Its matte tin-plated leads meet J-STD-002 solderability standards, and the DO-214AB package withstands peak temperatures up to 260 °C for 10 seconds. The RS3J's thermal performance and packaging integrity are verified through qualification testing, ensuring robust interconnect reliability in high-volume SMT lines.

How does RS3J compare to RS3K in terms of voltage rating and recovery speed?

The RS3J has a 600 V VRRM rating and 250 ns trr, whereas the RS3K is rated for 800 V VRRM and 500 ns trr. This makes the RS3J better suited for 400–600 V bus applications where faster recovery is prioritized over ultra-high voltage blocking. The RS3J delivers lower switching loss than RS3K in mid-voltage converters, while maintaining identical package, thermal resistance, and mounting compatibility-enabling drop-in substitution where voltage margin permits.