Diodes Incorporated SMBJ5.0A-13-F

Overview

SMBJ5.0A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 5.0V reverse standoff voltage (VRWM), 6.4V minimum breakdown voltage (VBR), 9.2V maximum clamping voltage (VC) at 65.2A peak pulse current, and operates across –55°C to +150°C junction temperature. It is commonly deployed in industrial power supplies to safeguard 5V logic interfaces against ESD and lightning-induced surges.

For engineers reviewing the SMBJ5.0A-13-F datasheet, SMBJ5.0A-13-F pinout, SMBJ5.0A-13-F application, or SMBJ5.0A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD tolerance, peak pulse current capability under IEC 61000-4-5 surge conditions, thermal derating above +25°C, and compatibility with SMB package reflow profiles.

Technical Context

This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transients and stable clamping performance under repetitive 8.3ms half-sine surge waveforms. Its unidirectional configuration provides asymmetric conduction-low forward voltage (~3.5V at 35A) during positive overvoltage events and high reverse blocking (>5.0V) during normal operation.

The device is rated for 600W non-repetitive peak pulse power at TA = +25°C, with linear derating of 4.8W/°C above ambient. Its 0.1g mass and SMB package support compact PCB layouts while maintaining thermal coupling to copper pour for sustained surge energy dissipation.

Key Specifications

Pinout & Package

Package: SMB (Surface-Mount Small Outline), molded plastic case with UL 94V-0 flammability rating, matte tin-plated terminals, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ5.0A-13-F, the Vishay alternative offers identical clamping performance but marginally higher leakage, while the ON Semiconductor part matches electrical parameters but demands greater board-level thermal management to maintain 600W surge capability at elevated temperatures.

Availability

SMBJ5.0A-13-F is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply with full traceability and lifecycle continuity.

Supply support for SMBJ5.0A-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, specializing in high-reliability protection, power management, and signal integrity solutions for industrial and automotive markets.

The SMBJ series is engineered specifically for robust transient suppression in harsh environments, targeting applications where repeatable clamping performance, low leakage, and AEC-Q200 readiness (for select variants) are critical.

FAQ

What is the maximum clamping voltage of SMBJ5.0A-13-F at its rated peak pulse current?

The maximum clamping voltage (VC) is 9.2V at 65.2A peak pulse current (Ipp), measured under the standard 8.3ms half-sine waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.

Is SMBJ5.0A-13-F suitable for bidirectional signal line protection?

No - SMBJ5.0A-13-F is a unidirectional TVS diode, indicated by the absence of "C" in its part number. For bidirectional protection (e.g., RS-485, USB D+/D−), the bi-directional variant SMBJ5.0CA-13-F must be used, which clamps symmetrically for both polarities and has doubled leakage current specification below 10V VRWM.

How does the SMB package affect thermal performance in continuous operation?

The SMB package has a steady-state power dissipation limit of 5.0W at TL = +75°C, with thermal resistance from junction-to-lead (RθJL) enabling effective heat transfer to PCB copper. For reliable long-term operation, designers must provide ≥25 mm² of 1oz copper connected to both terminals and avoid excessive trace length to minimize thermal impedance.

Does SMBJ5.0A-13-F meet AEC-Q200 stress test requirements?

While SMBJ5.0A-13-F is not officially AEC-Q200 qualified, Diodes Incorporated offers the automotive-grade variant SMBJ5.0AHE3_A/H (with extended temperature screening and PPAP documentation). The commercial version shares identical die and packaging but lacks the full qualification test report required for automotive safety-critical modules.