Diodes Incorporated S3KB-13-F

Overview

S3KB-13-F from Diodes Incorporated is a 3.0A, 800V glass passivated surface-mount rectifier diode in SMB package, featuring 1.15V forward voltage at 3.0A, 100A non-repetitive surge capability, and RoHS-compliant matte tin plating. It serves as a primary AC/DC input rectifier in offline power supplies for industrial control systems requiring high reliability under transient overloads.

For engineers reviewing the S3KB-13-F datasheet, S3KB-13-F pinout, S3KB-13-F application, or S3KB-13-F equivalent, key selection criteria include peak reverse voltage (800V), average forward current (3.0A @ TT=75°C), thermal resistance (10°C/W), and SMB package compatibility with automated SMT assembly lines.

Technical Context

This device operates as a single-phase, half-wave silicon rectifier optimized for resistive or inductive loads at 60Hz line frequency. Its glass passivated junction ensures stable reverse leakage (<250µA at 125°C) and robust surge immunity up to 100A for 8.3ms half-sine wave.

The SMB package provides 10°C/W junction-to-terminal thermal resistance when mounted on a 5.0mm² copper pad, enabling sustained 3.0A conduction without active cooling in ambient temperatures up to +75°C.

Key Specifications

Pinout & Package

Package: SMB (Surface-Mount Small Outline), molded plastic case per UL 94V-0, cathode identified by band marking. Dimensions: 3.30–3.94 mm (L) × 4.06–4.57 mm (W) × 1.96–2.21 mm (H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS3H100SB and MUR380E, S3KB-13-F delivers optimal balance of 800V blocking, 3A current, SMB compactness, and cost for standard 50/60Hz rectification-without over-specifying speed or sacrificing thermal performance.

Availability

S3KB-13-F is available at Aetrix Electronics and suitable for industrial power supplies, motor drive auxiliary rails, LED driver bulk rectification, and UPS line-conditioning stages requiring stable component supply across multi-year production cycles.

Supply support for S3KB-13-F 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 centers across Asia and manufacturing in China, Malaysia, and Taiwan.

The S3x series belongs to Diodes' general-purpose rectifier product line, engineered specifically for cost-sensitive, high-volume AC/DC conversion in industrial, lighting, and power infrastructure applications where reliability under surge and thermal stress is critical.

FAQ

What is the maximum allowable junction temperature for S3KB-13-F?

The absolute maximum junction temperature is +150°C, with continuous operation rated up to +75°C terminal temperature. Derating begins above +75°C per Figure 1 in DS16005 Rev. 18-2, reaching 0A at +150°C terminal temperature. Thermal design must ensure RθJT × PD + TA ≤ 150°C.

Can S3KB-13-F be used in full-wave bridge configurations?

No-S3KB-13-F is a single diode in SMB package and lacks internal bridge topology. For full-wave rectification, four discrete S3KB-13-F units may be assembled into a discrete bridge, but Diodes' SB380 or GBU6K are recommended for integrated bridge solutions with matched parameters and mechanical stability.

Is the SMB package of S3KB-13-F compatible with standard reflow profiles?

Yes-the device has Level 1 moisture sensitivity per J-STD-020 and matte tin plating qualified to MIL-STD-202 Method 208. It supports industry-standard lead-free reflow profiles (peak 260°C, 60-second duration) without preconditioning or baking.

How does the 100A surge rating relate to real-world line transients?

The 100A rating applies to an 8.3ms half-sine waveform (one 60Hz cycle), matching common AC line surge test standards such as IEC 61000-4-5. It ensures survival of typical lightning-induced surges and generator switching transients in industrial mains distribution networks.