Diodes Incorporated SMBJ100CA-13-F

Overview

SMBJ100CA-13-F from Diodes Incorporated is a bi-directional 600W surface-mount transient voltage suppressor (TVS) with 100V reverse standoff voltage, 162V max clamping voltage at 3.7A peak pulse current, and SMB package. It protects DC power rails and data lines in industrial motor drives, telecom power supplies, and automotive body control modules against ESD and lightning-induced surges.

For engineers reviewing the SMBJ100CA-13-F datasheet, SMBJ100CA-13-F pinout, SMBJ100CA-13-F application, or SMBJ100CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system operating voltage, peak pulse current capability under 8.3ms half-sine waveform, unidirectional vs. bi-directional polarity requirements, and thermal derating above +25°C ambient.

Technical Context

This bi-directional TVS diode operates symmetrically across both polarities, enabling protection of AC-coupled signal lines and floating DC buses without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5µA at 100V VRWM).

The device clamps transients within nanoseconds using avalanche breakdown, with thermal performance governed by its 5.0W steady-state dissipation at TL = +75°C and 4.8W/°C derating above +25°C ambient. It meets IEC 61000-4-2 Level 4 (±15kV contact) and IEC 61000-4-5 (4kV 8/20µs) surge immunity standards when properly laid out.

Key Specifications

Pinout & Package

Bi-directional TVS diode with two terminals in SMB package: Cathode band absent (no polarity marking). Terminals are symmetrical; either end connects to line or ground depending on circuit topology.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ100CA-13-F, SMBJ100CA-T offers identical protection performance with alternate packaging, while SMAJ100CA-13-F trades 33% lower pulse power for smaller size-making it unsuitable for power-line surge duty but viable for space-constrained signal-line protection.

Availability

SMBJ100CA-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 and full compliance with AEC-Q200 and RoHS directives.

Supply support for SMBJ100CA-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 U.S.

SMBJ series TVS diodes are part of Diodes' circuit protection product line, engineered specifically for high-reliability industrial, telecom, and automotive applications demanding precise clamping, low leakage, and robust surge endurance.

FAQ

What does the "C" in SMBJ100CA-13-F signify?

The "C" suffix denotes bi-directional functionality, meaning the device clamps transients of either polarity symmetrically. Unlike uni-directional variants (e.g., SMBJ100A), it has no cathode band marking and is used where AC signals or floating DC rails require polarity-agnostic protection-such as RS-485 lines or transformer-isolated power inputs.

Can SMBJ100CA-13-F be used in place of a uni-directional TVS like SMBJ100A?

Yes, but only if the circuit does not rely on DC blocking in one direction. Bi-directional devices conduct in both directions once clamped, so they cannot replace uni-directional TVS diodes in circuits requiring reverse-polarity protection (e.g., DC input protection with polarity reversal risk) without verifying that bidirectional conduction won't interfere with normal operation.

What is the thermal resistance from junction to lead (RθJL) for SMBJ100CA-13-F?

Per DS19002 Rev. 20-2, RθJL is 25°C/W. This value is derived from the 5.0W steady-state power dissipation rating at TL = +75°C and the 150°C maximum junction temperature: (150 − 75) ÷ 5.0 = 25°C/W. It governs heat transfer from die to PCB copper via leads and must be considered in high-duty-cycle surge scenarios.

How does SMBJ100CA-13-F perform under repeated surge stress?

It is rated for non-repetitive surges per JEDEC JESD22-A114 (ESD) and IEC 61000-4-5 (lightning), with no specified lifetime for repetitive events. Data sheet testing uses ≤4 pulses/minute at 8.3ms; sustained repetition requires external thermal management and derating per Fig. 1's 4.8W/°C curve to avoid junction overheating and parametric drift.