Diodes Incorporated S8KC-13

Overview

S8KC-13 from Diodes Incorporated is an 8.0A surface-mount glass passivated rectifier diode in SMC package, rated for 800V peak repetitive reverse voltage (V_RRM), with 0.985V forward voltage at 8.0A, 10μA reverse leakage at 25°C, and 200A non-repetitive surge capability - used in AC/DC front-end rectification for industrial power supplies and LED drivers.

For engineers reviewing the S8KC-13 datasheet, S8KC-13 pinout, S8KC-13 application, or S8KC-13 equivalent, key selection criteria include V_RRM margin vs. line transients, thermal resistance (R_θJT = 10°C/W), surge rating (200A @ 8.3ms), RoHS/Green compliance, and SMC package compatibility with automated reflow assembly.

Technical Context

This device is a single-phase, silicon planar junction rectifier with guard ring structure for transient protection and enhanced surge robustness. It operates under resistive or inductive loads at 60Hz, with derating required for capacitive loads (−20% I_O). Its 2700ns reverse recovery time (T_RR) and 45pF junction capacitance reflect standard slow-recovery behavior suitable for line-frequency applications.

Thermal performance is defined with junction-to-terminal resistance of 10°C/W when mounted on a specified 100.5mm × 102.5mm × 1.7mm copper heatsink. Operating temperature range spans −65°C to +150°C, supporting deployment in harsh ambient environments without derating below −40°C.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), molded plastic case with UL 94V-0 flammability rating, matte tin-plated terminals, cathode band polarity marking, and approximate weight of 0.21 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06D and VS-8EWH06FNTR-M3, S8KC-13 offers superior 800V voltage margin and lower forward drop, making it optimal for universal-input (90–264VAC) and high-surge industrial rectification where thermal and reliability constraints dominate.

Availability

S8KC-13 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input rectification, and motor drive input stages requiring stable component supply, long-life reliability, and RoHS-compliant sourcing.

Supply support for S8KC-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The S8KC-13 belongs to Diodes' high-current rectifier product line, engineered for robust line-frequency AC/DC conversion in industrial, lighting, and power infrastructure applications where surge immunity and thermal stability are critical.

FAQ

What is the maximum allowable case temperature for continuous 8A operation?

The S8KC-13 is rated for 8.0A average forward current at terminal temperature (T_T) of +75°C. Exceeding this temperature requires linear derating per Figure 1 in DS31117 - at +100°C T_T, maximum I_O drops to ~5.5A. Thermal design must ensure terminal temperature remains ≤75°C under worst-case ambient and airflow conditions.

Is S8KC-13 suitable for use in a full-wave bridge configuration?

Yes - S8KC-13 is a single diode in SMC package and is commonly used as one quadrant in discrete full-wave bridge assemblies. Its 800V V_RRM, 200A surge rating, and glass passivation make it appropriate for bridge configurations in 230VAC systems, provided all four devices are matched and thermally balanced on the PCB.

Does S8KC-13 require snubber circuits in typical 50/60Hz rectifier applications?

No snubber is required for standard resistive or inductive loads at 50/60Hz. However, snubbers may be needed when driving highly capacitive inputs (e.g., large bulk capacitors without pre-charge) to limit di/dt-induced voltage overshoot - due to its 2700ns T_RR, not inherent instability, but standard practice for EMI control and stress reduction.

How does the SMC package compare to DPAK or TO-220 in thermal performance?

The SMC package has R_θJT = 10°C/W (junction-to-terminal), measured on a large Cu heatsink. In contrast, DPAK typically achieves ~15°C/W and TO-220 ~2–3°C/W with heatsink. SMC offers better thermal performance than DPAK but less than TO-220; its advantage lies in SMT compatibility, smaller footprint, and suitability for high-volume automated assembly without lead-forming.