Diodes Incorporated S1MB-13-F

Overview

S1MB-13-F from Diodes Incorporated is a surface-mount, glass-passivated general-purpose silicon rectifier diode in SMB package, rated for 1000 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 delivers low forward voltage drop (≤1.1 V @ 1.0 A) and fast recovery (trr ≤ 3.0 μs), making it suitable for AC/DC input rectification in offline power supplies.

For engineers reviewing the S1MB-13-F datasheet, S1MB-13-F pinout, S1MB-13-F application, or S1MB-13-F equivalent, key selection criteria include its 1000 V blocking capability, SMB thermal performance (RθJT = 30 °C/W), reverse leakage (≤100 μA @ +125°C), and RoHS-compliant matte tin termination for lead-free reflow assembly.

Technical Context

This device operates as a unidirectional, single-phase, half-wave rectifier under resistive or inductive loads at 60 Hz. Its glass-passivated junction ensures stable reverse characteristics across -65°C to +150°C operating range and supports automated pick-and-place placement due to standardized SMB footprint.

Electrical behavior is defined by a soft recovery profile (trr = 1.8–3.0 μs), low junction capacitance (CT = 10 pF @ 1 MHz, 4 V), and forward conduction with VF ≤ 1.1 V at rated DC load - enabling efficient energy conversion without snubber circuits in medium-frequency SMPS front-ends.

Key Specifications

Pinout & Package

The S1MB-13-F uses the SMB (DO-214AA) surface-mount plastic package with cathode band marking on the top surface. Terminal polarity is unambiguous: the banded end is the cathode; the opposite end is the anode.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar general-purpose rectifier applications.

Compared with STTH1L06S and MUR1100E, S1MB-13-F offers optimal balance of high-voltage ruggedness, moderate speed, low VF, and SMB manufacturability - ideal for cost-sensitive, thermally constrained universal-input rectification where sub-100 ns recovery is unnecessary.

Availability

S1MB-13-F is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial motor drive auxiliary supplies, and LED driver front-ends requiring stable component supply, consistent parametric performance, and full RoHS/Green compliance.

Supply support for S1MB-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, manufacturing, and sales operations across Asia, Europe, and the Americas.

The S1x-B rectifier series targets cost-effective, high-reliability AC input stage solutions for consumer, industrial, and lighting power supplies - emphasizing robust surge handling, thermal stability, and automated assembly readiness.

FAQ

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

The datasheet specifies thermal resistance RθJT = 30 °C/W when mounted on 5.0 mm² of 0.013 mm thick copper pad. Increasing pad area beyond this improves heat dissipation but yields diminishing returns; minimum recommended pad size is 4.3 mm × 1.8 mm (SMB footprint) with thermal vias to inner ground planes for sustained 1.0 A operation.

Can S1MB-13-F be used in full-wave bridge configurations?

Yes - S1MB-13-F is rated for single-phase, half-wave operation per datasheet test conditions, but its 1000 V VRRM and 30 A IFSM make it suitable as an individual leg in discrete full-wave bridges. Four units can form a 1000 V, 1.0 A bridge; ensure matched VF and trr across all four devices for balanced current sharing.

Is the cathode band visible under standard AOI inspection?

Yes - the cathode band is a laser-marked, opaque black stripe on the top surface of the SMB package, fully compatible with automated optical inspection systems operating at ≥10 μm resolution. Its contrast against the green-molded body ensures >99.9% detection rate in production AOI setups.

Does S1MB-13-F require derating when used with capacitive loads?

Yes - the datasheet explicitly states that for capacitive loads, average forward current must be derated by 20%. At TA = +25°C, IO must be limited to 0.8 A to maintain reliability; this reflects increased peak current stress during capacitor charging transients, which elevates junction temperature beyond resistive-load assumptions.