Diodes Incorporated SMBJ58A-13-F

Overview

SMBJ58A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 58V reverse standoff voltage, 64.4V minimum breakdown voltage at 1mA, 93.6V maximum clamping voltage at 6.4A peak pulse current, and SMB package. It protects DC power rails and signal lines in industrial motor drives, telecom power supplies, and automotive body control modules against ESD and lightning-induced surges.

For engineers reviewing the SMBJ58A-13-F datasheet, SMBJ58A-13-F pinout, SMBJ58A-13-F application, or SMBJ58A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC V_DD, peak pulse current capability under 8.3ms waveform, thermal derating above +25°C, and RoHS-compliant matte tin plating for lead-free reflow compatibility.

Technical Context

This TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds V_RWM = 58V, it transitions from high-impedance leakage mode (<5μA) to low-impedance conduction, limiting transient energy by diverting surge current to ground. Its glass-passivated die ensures stable breakdown characteristics across temperature.

The device follows the 10/1000μs double-exponential surge standard per REA, delivering 600W peak pulse power at T_A = +25°C with linear derating of 4.8W/°C above ambient. Its SMB package supports automated SMT placement and provides 0.1g mass for thermal inertia during transient events.

Key Specifications

Pinout & Package

Package: SMB (Surface Mount Body), molded plastic case rated UL 94V-0, 3.3–3.94mm length × 4.06–4.57mm width × 1.96–2.21mm height, 0.1g weight, matte tin-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ58A-E3/52, the SMBJ58A-13-F offers tighter clamping voltage control critical for 5V logic interface protection; versus 1.5SMC58A, its smaller SMB package enables 38% board space reduction in space-constrained I/O modules.

Availability

SMBJ58A-13-F is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply with full traceability and lifecycle management.

Supply support for SMBJ58A-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 centers across Asia and manufacturing in China, Taiwan, and the US.

This part belongs to Diodes' SMBJ series of transient voltage suppressors, engineered specifically for high-reliability industrial and automotive surge protection where precise clamping, low leakage, and RoHS-compliant packaging are mandatory.

FAQ

What is the polarity configuration of SMBJ58A-13-F?

SMBJ58A-13-F is a unidirectional TVS diode with cathode indicated by a band on the SMB package body. It conducts only during reverse overvoltage events and blocks forward current like a standard diode. The "A" suffix confirms unidirectional construction, distinct from bi-directional variants marked with "C" (e.g., SMBJ58CA).

Can SMBJ58A-13-F be used in parallel for higher surge current handling?

No - SMBJ58A-13-F is not characterized for parallel operation due to mismatch in breakdown voltage (64.4–74.6V range) causing current imbalance. Parallel use risks thermal runaway in the lower-V_BR unit. For higher current, select a single higher-rated device such as SMBJ64A or SMBJ70A instead.

What is the maximum allowable PCB pad temperature during reflow soldering?

The SMBJ58A-13-F supports standard lead-free reflow profiles per JEDEC J-STD-020. Peak temperature must not exceed 260°C for ≤10 seconds, with ramp-up rate ≤3°C/s and ramp-down rate ≤6°C/s. Preheat to 150°C for 90–120 seconds before soaking at 183–200°C for 60–150 seconds.

Does this TVS require a heatsink for continuous power dissipation?

No - SMBJ58A-13-F has no heatsink requirement for transient suppression, as its 5.0W steady-state power rating applies only at T_L = +75°C with leads held at ambient. Under normal operation, leakage current is <5μA, resulting in negligible continuous power dissipation (<0.3mW at 58V). Thermal design focuses on transient energy absorption, not steady-state cooling.