Diodes Incorporated 3.0SMCJ5.0CAQ-13

Overview

3.0SMCJ5.0CAQ-13 from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode designed for primary surge protection on 12V vehicle power rails and signal lines. It delivers 3000W peak pulse power at 8/20μs, clamps to ≤9.2V at 326.1A, and maintains 5.0V reverse standoff voltage - meeting ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), and ISO10605 ESD (±30kV contact/air) requirements in engine control units and body electronics.

For engineers reviewing the 3.0SMCJ5.0CAQ-13 datasheet, 3.0SMCJ5.0CAQ-13 pinout, 3.0SMCJ5.0CAQ-13 application, or 3.0SMCJ5.0CAQ-13 equivalent, key selection criteria include clamping voltage vs. protected IC V_DD margin, bidirectional capability for AC-coupled or floating buses, AEC-Q101 qualification status, and SMC package thermal performance under repeated surge stress.

Technical Context

This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of differential interfaces (e.g., LIN, CAN FD stubs) and ungrounded sensor inputs without polarity constraints. Its 6.40–7.07V breakdown range at 10mA ensures reliable triggering before downstream transceivers or microcontrollers reach absolute maximum ratings.

Clamping occurs within nanoseconds under 10×1000μs surge waveforms, limiting transient energy delivered to protected circuits. The device sustains 300A non-repetitive forward surge current (8.3ms half-sine) and derates linearly above +25°C ambient, with full operation from −55°C to +175°C junction temperature.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), surface-mount, molded plastic with UL 94V-0 flammability rating; 0.21g weight; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ5.0CA and 1.5SMCJ5.0CA, the 3.0SMCJ5.0CAQ-13 provides 50% higher peak power and 100% greater surge current handling - enabling single-device compliance with full ISO7637-2 and ISO10605 requirements in powertrain and ADAS domains where failure modes demand highest robustness.

Availability

3.0SMCJ5.0CAQ-13 is available at Aetrix Electronics and suitable for engine control units, LIN bus nodes, automotive camera power supplies, and occupant detection systems requiring stable component supply across multi-year vehicle production cycles.

Supply support for 3.0SMCJ5.0CAQ-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 for automotive, industrial, and computing markets, with design centers across Asia, Europe, and the US.

This device belongs to Diodes' AEC-Q101-qualified 3.0SMCJ series - engineered specifically for automotive transient suppression with validated reliability under extended temperature cycling, humidity, and mechanical shock per IATF16949 protocols.

FAQ

What does the 'C' suffix in 3.0SMCJ5.0CAQ-13 indicate?

The 'C' denotes a bi-directional configuration, meaning the device conducts and clamps symmetrically for both positive and negative voltage transients. This eliminates polarity concerns during PCB layout and supports protection of AC-coupled or floating signal lines such as LIN or sensor bridges without requiring dual unidirectional devices.

How does 3.0SMCJ5.0CAQ-13 meet ISO7637-2 Pulse 1 requirements?

With a clamping voltage of ≤9.2V at 326.1A and 3000W peak power rating, it limits the −150V Pulse 1 transient to a safe level well below the 16V absolute maximum rating of typical 12V-system power ICs. Its 300A IFSM rating and thermal design sustain repeated exposure without parameter drift.

Is this device suitable for protecting 3.3V logic interfaces?

Yes - its 5.0V reverse standoff voltage provides sufficient margin above 3.3V nominal rails, and its ≤9.2V clamping voltage remains below the 12V absolute maximum rating of most 3.3V interface ICs. It is commonly used on LIN transceiver VPW pins and analog sensor inputs in automotive modules.

What packaging and reel specifications apply to 3.0SMCJ5.0CAQ-13?

The part ships in SMC package on 3,000-piece tape-and-reel carriers (EIA-481 compliant), with matte tin lead finish, RoHS 3 and halogen-free compliance, and moisture sensitivity level 1 - allowing indefinite floor life without dry pack or baking prior to reflow soldering.