Diodes Incorporated S1KB-13

Overview

S1KB-13 from Diodes Incorporated is a surface-mount, glass-passivated silicon rectifier diode rated for 800 V peak repetitive reverse voltage, 1.0 A average forward current at 100°C terminal temperature, and 30 A non-repetitive surge current. It features low forward voltage drop (≤1.1 V at 1.0 A), fast recovery time (1.8–3.0 μs), and SMB package construction with matte tin lead-free plating. It is used in AC/DC input rectification stages of offline power supplies and auxiliary power rails.

For engineers reviewing the S1KB-13 datasheet, S1KB-13 pinout, S1KB-13 application, or S1KB-13 equivalent, key selection criteria include its 800 V blocking capability, thermal resistance (30 °C/W junction-to-terminal), reverse leakage (≤100 μA at +125°C), and compatibility with automated tape-and-reel assembly for high-volume manufacturing.

Technical Context

This device operates as a single-phase, half-wave rectifier under resistive or inductive loads at 60 Hz. Its glass-passivated die construction ensures stable performance across -65°C to +150°C operating temperature range and supports reliable operation in thermally constrained PCB layouts.

The SMB package provides higher thermal mass than SMA, enabling sustained 1.0 A conduction at TT = +100°C per derating curve. Reverse recovery behavior is characterized with IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A, yielding trr ≤ 3.0 μs - suitable for medium-frequency switching applications up to ~100 kHz.

Key Specifications

Pinout & Package

SMB (DO-214AA) surface-mount package: cathode indicated by band on body; anode and cathode terminals are coplanar, designed for reflow soldering on standard PCB pads per AP02001 layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R08 and ES1J-M3/5AT, S1KB-13 uniquely balances 800 V blocking, SMB SMT compatibility, and 30 A surge tolerance - making it optimal for cost-sensitive, space-constrained offline rectifiers where reliability under transient overload is critical.

Availability

S1KB-13 is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial control power supplies, and LED driver secondary-side rectification requiring stable component supply and long-term manufacturability.

Supply support for S1KB-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 and manufacturing operations across Asia and the US.

The S1x-B series belongs to Diodes' general-purpose rectifier product line, engineered for robustness in AC input stages of consumer, industrial, and appliance power supplies where cost, reliability, and regulatory compliance are prioritized.

FAQ

What is the maximum allowable junction temperature for S1KB-13?

The absolute maximum junction temperature is +150°C, as specified in the Thermal Characteristics table. Operation above this limit risks permanent degradation of the PN junction. Derating curves show that average forward current must be reduced to 0.4 A at +125°C ambient when using standard PCB copper pads, ensuring TJ stays within safe limits.

Can S1KB-13 replace S1JB-13 in an existing design?

Yes, S1KB-13 (800 V) can directly replace S1JB-13 (600 V) if the circuit's peak reverse voltage does not exceed 800 V. No layout or thermal changes are needed since both use identical SMB packages and share matching electrical characteristics except VRRM and VR(RMS). Verify worst-case transient voltage margins before substitution.

Is S1KB-13 suitable for use in a PFC boost diode position?

No - S1KB-13 is not optimized for PFC boost applications. Its 1.8–3.0 μs reverse recovery time is too slow for typical 65–133 kHz PFC frequencies, causing excessive switching loss and EMI. Fast recovery or ultrafast diodes with trr ≤ 75 ns (e.g., FFPF10U80S) are required for that role.

Does S1KB-13 require a heatsink in standard applications?

Not typically - the SMB package's 30 °C/W junction-to-terminal thermal resistance allows 1.0 A conduction at TT = +100°C using only 5.0 mm² of 0.013 mm thick copper as a heatsink. For continuous 1.0 A loads in enclosed, high-ambient environments (>60°C), adding supplemental copper pour or thermal vias is recommended to maintain safe junction temperature.