Diodes Incorporated SMBJ9.0A-13-F

Overview

SMBJ9.0A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 9.0V reverse standoff voltage, 10.0–11.5V breakdown voltage at 1.0mA, and 15.4V max clamping voltage at 39.0A peak pulse current. It protects DC power rails and I/O lines in industrial control systems, automotive body electronics, and telecom interfaces against ESD and lightning-induced surges.

For engineers reviewing the SMBJ9.0A-13-F datasheet, SMBJ9.0A-13-F pinout, SMBJ9.0A-13-F application, or SMBJ9.0A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC V_DD, peak pulse current capability under 8.3ms half-sine waveform, unidirectional polarity for DC-biased lines, and SMB package thermal performance at +75°C lead temperature.

Technical Context

This TVS operates as a voltage-clamped shunt protector: it remains high-impedance below VRWM (9.0V), avalanches sharply at VBR (10.0–11.5V), and limits transient energy by clamping to ≤15.4V at 39.0A. Its glass-passivated junction ensures stable leakage (<5.0µA at VRWM) and repeatable breakdown behavior across temperature.

The device is rated for non-repetitive 8.3ms single half-sine surge events up to 100A forward surge current, with thermal derating of 4.8W/°C above +25°C ambient and steady-state power dissipation of 5.0W at TL = +75°C. It meets RoHS, halogen-free, and antimony-free "Green" requirements per Diodes Incorporated specifications.

Key Specifications

Pinout & Package

Two-terminal SMB package: Cathode band denotes terminal 1 (anode is terminal 2). No internal pin numbering-device functions as a polarized bidirectional clamp only when used in unidirectional configuration with cathode connected toward protected line.

Key Features

Applications

Availability

SMBJ9.0A-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom Ethernet port surge protection requiring stable component supply and full traceability.

Supply support for SMBJ9.0A-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, automotive, and computing markets.

This part belongs to the SMBJ series of 600W surface-mount TVS diodes, engineered specifically for cost-sensitive, space-constrained applications demanding consistent clamping performance and AEC-Q200 readiness in harsh environments.

Equivalent & Alternatives

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

Compared with SMBJ9.0A-13-F, the Vishay alternative offers higher peak power headroom for extended surge durations, while the ON Semiconductor version trades leakage and environmental compliance for lower unit cost-both retain identical PCB footprint and basic clamping behavior.

FAQ

What is the polarity configuration of SMBJ9.0A-13-F?

SMBJ9.0A-13-F is a unidirectional TVS diode with cathode band marking indicating the anode terminal. It conducts only when the marked end is at higher potential than the opposite end, making it suitable for DC-biased lines where reverse conduction must be blocked. Bi-directional variants use the "C" suffix (e.g., SMBJ9.0CA).

Can SMBJ9.0A-13-F be used in parallel for higher surge current handling?

No-parallel connection is not recommended due to mismatched breakdown voltages causing current imbalance and premature failure of one device. For higher current capability, select a higher-rated part (e.g., 1500W SMAJ series) or implement staged protection with GDT + TVS coordination instead of paralleling identical SMBJ units.

What is the maximum operating temperature for continuous use?

The SMBJ9.0A-13-F has a junction temperature range of –55°C to +150°C and a storage temperature range up to +175°C. For continuous power dissipation, its steady-state rating is 5.0W at TL = +75°C; derating follows 4.8W/°C above that point, limiting usable ambient temperature based on PCB copper area and airflow.

Does this device meet AEC-Q200 qualification for automotive use?

While SMBJ9.0A-13-F is widely deployed in automotive body electronics, Diodes Incorporated does not list it as AEC-Q200-qualified in official documentation. For AEC-Q200-compliant alternatives, consider the automotive-grade SMBJ9.0AHE3 (Vishay) or SMAJ9.0A-Q (ON Semiconductor), both explicitly qualified to Grade 3 (–40°C to +85°C ambient).