Diodes Incorporated S8NC-13

Overview

S8NC-13 from Diodes Incorporated is a glass passivated surface-mount rectifier diode in SMC package, rated for 1200 V peak repetitive reverse voltage, 8.0 A average forward current, and 225 A non-repetitive surge current, with typical forward voltage of 0.98 V at 8.0 A and 25°C - used in high-voltage AC/DC front-end rectification stages of industrial power supplies.

For engineers reviewing the S8NC-13 datasheet, S8NC-13 pinout, S8NC-13 application, or S8NC-13 equivalent, key selection criteria include verified 1200 V blocking capability, thermal resistance of 10.4 °C/W (junction-to-terminal), guard-ring-enhanced transient robustness, and RoHS-compliant matte tin annealed terminals suitable for automated reflow assembly.

Technical Context

This device operates as a single-phase, half-wave silicon rectifier optimized for high-voltage, medium-current DC power conversion. Its glass passivation ensures stable junction integrity under thermal cycling, while the integrated guard ring structure improves surge immunity and reduces localized field crowding during transient overvoltage events.

The SMC package enables high-power dissipation with low thermal resistance (10.4 °C/W) when mounted on copper pads per JEDEC standards. Electrical behavior is characterized by low capacitance (40 pF at 4 V, 1 MHz) and temperature-stable leakage - IR ≤ 10 µA at 1200 V and 25°C, rising to ≤500 µA at 125°C.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), molded plastic case with UL 94V-0 flammability rating, cathode indicated by band marking, weight ≈0.26 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06D and VS-8EWH06FN-M3, S8NC-13 uniquely delivers 1200 V capability in an SMC surface-mount package - eliminating need for heatsinks while maintaining surge robustness and low VF critical for high-efficiency, high-reliability industrial rectification.

Availability

S8NC-13 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive input rectification, and uninterruptible power systems requiring stable component supply and long-lifecycle availability.

Supply support for S8NC-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, serving industrial, computing, consumer, and communications markets with high-reliability components.

The S8NC series belongs to Diodes' high-voltage rectifier product line, engineered specifically for ruggedized front-end AC/DC conversion in harsh-environment power systems where surge resilience and thermal stability are critical.

FAQ

What is the maximum junction temperature for S8NC-13?

The S8NC-13 has an operating junction temperature range of –65°C to +150°C. This rating is validated per JEDEC test conditions and confirmed in the DS36851 datasheet, Table "Thermal Characteristics." Derating curves in Figure 1 show usable current decreases linearly above +25°C ambient, reaching ~4.5 A at +100°C ambient with standard PCB mounting.

Is S8NC-13 suitable for use in a full-wave bridge configuration?

Yes - S8NC-13 is a single diode rated for 1200 V reverse voltage and 8 A average forward current, making it appropriate for each leg of a discrete full-wave bridge. Four units can be assembled into a 1200 V, 8 A bridge; however, thermal management must account for cumulative power dissipation across all four devices on shared copper areas.

Does S8NC-13 require a heatsink in standard SMC PCB mounting?

No external heatsink is required under typical conditions: with 2 oz copper pads (0.2 in × 0.25 in) on FR-4, RθJT = 10.4 °C/W enables safe operation up to ~5 W dissipation. At 8 A and VF = 0.98 V, power loss is ~7.8 W - requiring enhanced copper area or airflow, but not a discrete heatsink, per datasheet Note 6 and Figure 6.

How is polarity identified on the S8NC-13 package?

Polarity is marked by a distinct cathode band on the body end of the SMC package. Per datasheet mechanical drawings and "Marking Information," the band aligns with the cathode terminal; the opposite end is the anode. This matches industry-standard DO-214AB orientation and is verified in top-view illustrations on page 4 of DS36851 Rev. 3–2.