Diodes Incorporated SMBJ100A-13-F

Overview

SMBJ100A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 100V reverse standoff voltage, 111V minimum breakdown voltage, and 162V maximum clamping voltage at 3.7A peak pulse current. It features glass-passivated die construction, SMB package, and is rated for industrial temperature range (–55°C to +150°C), commonly used for overvoltage protection in DC power rails of telecom interface circuits.

For engineers reviewing the SMBJ100A-13-F datasheet, SMBJ100A-13-F pinout, SMBJ100A-13-F application, or SMBJ100A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC V_MAX, peak pulse current capability under IEC 61000-4-5 surge conditions, thermal derating above +25°C, and unidirectional polarity alignment with DC supply topology.

Technical Context

This TVS operates as a fast-acting shunt protector: under normal bias (V_RWM = 100V), leakage remains ≤5.0 µA; when transient exceeds V_BR (min 111V), it avalanches into low-impedance conduction within <1 ns to clamp voltage at ≤162V. Its 600W peak pulse power rating is defined per 10/1000 µs waveform with 4-pulse-per-minute duty cycle limit.

The device uses a planar junction structure with glass passivation for stable breakdown characteristics and long-term reliability. Its SMB package provides 3.3–3.94 mm body height and 4.06–4.57 mm width, enabling high-density PCB layout while maintaining 5.0 W steady-state dissipation at T_L = +75°C.

Key Specifications

Pinout & Package

Package: SMB (Surface-Mount Small Outline), molded plastic case with matte tin-plated terminals, cathode band marking on one end for unidirectional polarity identification. Dimensions: 4.06–4.57 mm width, 3.30–3.94 mm height, 5.00–5.59 mm length.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with SMBJ100A-13-F, the Vishay alternative offers higher surge endurance at identical clamping, while the ON Semiconductor part delivers tighter parametric consistency and lower leakage-both retain SMB footprint compatibility but differ in long-term reliability validation scope and test methodology.

Availability

SMBJ100A-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O protection, telecom line card surge suppression, and automotive body control module designs requiring stable component supply with full traceability and lifecycle management.

Supply support for SMBJ100A-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 North America.

The SMBJ series belongs to Diodes' transient voltage suppression product line, engineered specifically for high-reliability DC power rail and signal line protection in harsh electromagnetic environments including factory automation, telecom infrastructure, and transportation systems.

FAQ

What is the polarity configuration of SMBJ100A-13-F?

SMBJ100A-13-F is a unidirectional TVS diode, with cathode marked by a visible band on the SMB package body. It conducts only when cathode voltage exceeds anode voltage by ≥111 V, making it suitable for DC rail protection where polarity is fixed and reverse-voltage blocking is required.

How does SMBJ100A-13-F perform under repeated surge stress?

Per DS19002 Rev. 20-2, SMBJ100A-13-F is rated for non-repetitive pulses at ≤4 per minute. Repeated surges beyond this rate cause thermal accumulation, reducing effective clamping voltage margin; sustained operation requires derating per Fig. 1, with 4.8 W/°C reduction above +25°C ambient.

Can SMBJ100A-13-F be used in bidirectional signal lines like RS-485?

No - SMBJ100A-13-F is unidirectional and lacks symmetrical clamping. For bidirectional data lines, use the bi-directional variant SMBJ100CA-13-F (part number with "C" suffix), which clamps equally for both polarities and has identical V_RWM and V_C ratings.

What is the recommended PCB pad layout for SMBJ100A-13-F?

Diodes Incorporated specifies an SMB footprint with 2.50 mm pad width, 6.80 mm pad length (X1), and 2.30 mm center-to-center spacing (Y). Thermal relief and copper pour under the device are discouraged; minimum 0.15 mm solder mask dam is required to prevent bridging during reflow.