Diodes Incorporated 3.0SMCJ13AQ-13

Overview

3.0SMCJ13AQ-13 from Diodes Incorporated is an AEC-Q101 qualified, unidirectional automotive transient voltage suppressor (TVS) in SMC package, rated for 3000W peak pulse power, 13V reverse standoff voltage (VRWM), and clamping voltage of 21.5V at 139.5A peak pulse current. It protects CAN, LIN, and power-line circuits in engine control units and body electronics against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD surges.

For engineers reviewing the 3.0SMCJ13AQ-13 datasheet, 3.0SMCJ13AQ-13 pinout, 3.0SMCJ13AQ-13 application, or 3.0SMCJ13AQ-13 equivalent, this device is selected for high-energy surge immunity in 12V automotive subsystems where clamping voltage margin, IATF16949 traceability, and RoHS/Green compliance are mandatory design requirements.

Technical Context

This TVS diode operates as a unidirectional clamping device with avalanche breakdown behavior, triggered when transient voltage exceeds 14.4V (min VBR) and clamping within 21.5V (VC) under 10×1000μs waveform. Its thermal design supports continuous operation from –55°C to +175°C junction temperature, enabling placement near high-heat sources like power MOSFETs or DC-DC converters in under-hood modules.

The device uses silicon PN-junction avalanche structure with low dynamic impedance (<0.15Ω typical), ensuring fast response (<1.0ns) to transients while maintaining <2.0μA reverse leakage at VRWM. Its SMC package provides 8.00mm² copper pad thermal path, supporting 300A non-repetitive surge current per 8.3ms half-sine wave per MIL-STD-202 test conditions.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), surface-mount, molded plastic UL 94V-0 housing; 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 unidirectional TVS diode applications.

Compared with SMAJ13A and 1.5SMC13A, the 3.0SMCJ13AQ-13 delivers double the pulse energy capacity and AEC-Q101 validation-critical for powertrain and chassis systems where single-event reliability and automotive-grade process control are non-negotiable.

Availability

3.0SMCJ13AQ-13 is available at Aetrix Electronics and suitable for engine control units, CAN FD networks, body control modules, and electric power steering systems requiring stable component supply across multi-year vehicle production cycles.

Supply support for 3.0SMCJ13AQ-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the U.S., and manufacturing certified to IATF16949.

This device belongs to Diodes' 3.0SMCJ Automotive TVS family, engineered specifically for ISO7637-2 and ISO10605 compliance in 12V/24V vehicle electrical systems, emphasizing clamping precision, thermal robustness, and supply chain traceability.

FAQ

Is 3.0SMCJ13AQ-13 unidirectional or bidirectional?

It is unidirectional, as indicated by the absence of "C" suffix (e.g., 3.0SMCJ13AQ vs. 3.0SMCJ13CAQ). The cathode band marks the terminal connected to the protected line; the anode must be tied to ground. This configuration blocks reverse current during normal operation and conducts only during positive transients on the protected line.

What is the maximum allowable PCB pad size for thermal performance?

The datasheet specifies optimal thermal performance with 8.00mm² (0.013mm thick) copper land areas per terminal. Using smaller pads reduces IFSM derating capability; exceeding this area yields diminishing returns due to SMC package thermal resistance limits (junction-to-case ≈ 2.5°C/W).

Does it meet AEC-Q101 Rev D requirements?

Yes-Diodes Incorporated certifies this part to AEC-Q101 Rev D, including stress testing for HTGB, AC/DC life, temperature cycling, and mechanical shock. Full qualification reports and PPAP documentation are available upon request for automotive program registration.

Can it replace 3.0SMCJ13A in existing designs?

No-3.0SMCJ13AQ-13 replaces 3.0SMCJ13A-13, not 3.0SMCJ13A. The "Q" suffix denotes AEC-Q101 qualification and green material content; the "-13" denotes 3,000-piece tape-and-reel packaging. Electrical specs are identical, but qualification status and compliance documentation differ.