Diodes Incorporated 3.0SMCJ9.0A-13

Overview

3.0SMCJ9.0A-13 from Diodes Incorporated is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 9.0V reverse standoff voltage (VRWM), 10.0–11.05V breakdown voltage (VBR) at 1.0mA test current, and clamps transients to ≤15.4V at 194.8A peak pulse current under 10×1000μs waveform - deployed in automotive infotainment power inputs and industrial PLC I/O modules.

For engineers reviewing the 3.0SMCJ9.0A-13 datasheet, 3.0SMCJ9.0A-13 pinout, 3.0SMCJ9.0A-13 application, or 3.0SMCJ9.0A-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC rating, peak pulse current capability under system-level surge standards (IEC 61000-4-5), thermal derating above +25°C ambient, and SMC package solderability on 8mm² copper land patterns.

Technical Context

This TVS operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified breakdown range. Its glass-passivated die ensures stable VBR tolerance and low leakage (<10µA at VRWM), while the SMC package supports high thermal dissipation during 3000W transient events.

The device complies with IEC-61000-4-2 ESD immunity (30kV air/30kV contact), HBM (8kV), CDM (1kV), and MM (800V). It is rated for -55°C to +150°C operating junction temperature and requires no bias circuitry - functioning passively across input rails without control signals or external components.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), surface-mount, molded plastic body with matte tin-plated leads; cathode indicated by band on one end; weight ≈0.21g; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ9.0A and 1.5SMCJ9.0A, the 3.0SMCJ9.0A-13 delivers double the surge energy handling of the SMBJ and full margin for IEC 61000-4-5 Level 4 compliance - essential for automotive and industrial front-end protection where transient severity is highest.

Availability

3.0SMCJ9.0A-13 is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial PLC digital I/O protection, telecom PoE interfaces, and medical equipment DC power rail protection requiring stable component supply and full traceability.

Supply support for 3.0SMCJ9.0A-13 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 automotive, industrial, and computing markets.

The 3.0SMCJ series belongs to Diodes' high-power TVS portfolio, engineered specifically for robust front-end surge suppression in harsh environments where 3000W transient energy must be safely diverted without failure.

FAQ

What is the maximum clamping voltage of the 3.0SMCJ9.0A-13 under standard test conditions?

The maximum clamping voltage (VC) is 15.4V when subjected to a 194.8A peak pulse current under the standardized 10×1000μs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events.

Is the 3.0SMCJ9.0A-13 suitable for bidirectional signal line protection?

No - the "A" suffix denotes unidirectional configuration with a cathode band; it conducts only in reverse breakdown. For bidirectional protection (e.g., AC lines or differential pairs), the "CA" variant (e.g., 3.0SMCJ9.0CA-13) must be used, which lacks polarity marking and suppresses surges in both directions.

How does the SMC package affect PCB layout and thermal performance?

The SMC (DO-214AB) package requires 8.00mm² copper land areas per pad for optimal thermal dissipation and surge current handling. Its 6.6–7.11mm width and 5.59–6.22mm length demand precise stencil design; insufficient copper area reduces peak pulse current capability and accelerates thermal degradation during repeated surges.

Does the 3.0SMCJ9.0A-13 meet automotive qualification standards?

While the base part is JEDEC-qualified and RoHS/halogen-free, it is not AEC-Q200 qualified out-of-box. Automotive-grade versions carry a "Q" suffix (e.g., 3.0SMCJ9.0AQ-13) and are manufactured in IATF 16949-certified facilities with PPAP documentation - required for under-hood or safety-critical vehicle applications.