Diodes Incorporated S1JB-13

Overview

S1JB-13 from Diodes Incorporated is a surface-mount, glass-passivated silicon rectifier diode rated for 600 V peak repetitive reverse voltage (VRRM), 1.0 A average forward current (IO) at 100°C terminal temperature, and 30 A non-repetitive surge current (IFSM). It features 1.1 V maximum forward voltage at 1.0 A, 5.0 µA max reverse leakage at 25°C, and 1.8–3.0 µs reverse recovery time - deployed in AC/DC front-end rectification for industrial power supplies and LED drivers.

For engineers reviewing the S1JB-13 datasheet, S1JB-13 pinout, S1JB-13 application, or S1JB-13 equivalent, key selection criteria include its SMB package thermal resistance (RθJT = 30°C/W), RoHS-compliant matte tin plating, UL 94V-0 molded plastic case, and suitability for automated tape-and-reel assembly with 3,000-unit reels.

Technical Context

This device operates as a unidirectional power rectifier in single-phase, half-wave configurations with resistive or inductive loads. Its glass-passivated junction ensures stable performance under thermal cycling and humidity exposure, while the 600 V VRRM rating supports universal-input (85–265 VAC) offline SMPS designs.

The 30 A IFSM rating enables robust handling of inrush currents during cold-start conditions, and the 10 pF typical junction capacitance (measured at 1 MHz, 4 V reverse bias) minimizes high-frequency switching noise coupling in flyback and buck-derived topologies.

Key Specifications

Pinout & Package

Package: SMB (Surface Mount Body), molded plastic case with UL 94V-0 flammability rating, cathode identified by band marking, lead-free matte tin terminals solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar silicon rectifier diode applications.

Compared with MUR160 SMB and VS-1N4007-M3/54, S1JB-13 delivers optimal balance of surge robustness, thermal efficiency, and SMT manufacturability for cost-sensitive 50–100 kHz offline converters - avoiding trade-offs in either conduction loss or assembly compatibility.

Availability

S1JB-13 is available at Aetrix Electronics and suitable for industrial power supplies, LED drivers, appliance motor controllers, and UPS input protection circuits requiring stable component supply and long-term production continuity.

Supply support for S1JB-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 centers across Asia and manufacturing in China, Taiwan, and the U.S.

S1JB-13 belongs to the S1x/B series of general-purpose rectifiers engineered for high-reliability AC/DC conversion in cost-sensitive industrial and consumer power systems.

FAQ

What is the maximum allowable PCB copper pad size for thermal performance?

The datasheet specifies thermal resistance RθJT = 30°C/W when mounted on 5.0 mm² of 0.013 mm thick copper. Increasing pad area beyond this yields diminishing returns; doubling pad size improves RθJT by only ~15%. For 1.0 A continuous operation, maintain ≥5 mm² per terminal with internal thermal vias to inner-layer planes.

Can S1JB-13 replace S1J-13 in existing designs?

Yes - S1JB-13 is the SMB-package variant of S1J-13 (SMA package), sharing identical electrical specifications (600 V VRRM, 1.0 A IO, same VFM/trr/IRM). The only difference is package outline and thermal resistance (SMA: RθJT = 40°C/W; SMB: 30°C/W), making S1JB-13 preferable for thermally constrained layouts.

Is S1JB-13 suitable for use in automotive infotainment power supplies?

No - S1JB-13 is qualified for commercial temperature range (-65°C to +150°C), but lacks AEC-Q101 qualification, PPAP documentation, or automotive-grade traceability. For automotive applications, consider Diodes Incorporated's AEC-Q101-qualified SB160T3G (SMB, 60 V) or similar qualified rectifiers.

Does the cathode band orientation affect PCB layout routing?

Yes - the cathode band must align with the silkscreen polarity mark on the PCB. Incorrect orientation causes reverse conduction and catastrophic failure. Layouts must enforce strict anode-to-AC and cathode-to-DC routing; avoid placing thermal relief on cathode pad to preserve RθJT performance.