Diodes Incorporated 3.0SMCJ15A-13

Overview

3.0SMCJ15A-13 from Diodes Incorporated is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 15.0V reverse standoff voltage (VRWM), 16.7–18.5V breakdown voltage (VBR) at 1.0mA test current, and clamps transients to ≤24.2V at 124.0A peak pulse current under 10×1000μs waveform. Used in automotive infotainment power inputs and industrial PLC I/O modules.

For engineers reviewing the 3.0SMCJ15A-13 datasheet, 3.0SMCJ15A-13 pinout, 3.0SMCJ15A-13 application, or 3.0SMCJ15A-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD tolerance, 3000W peak power handling for lightning surge immunity (IEC 61000-4-5 Level 3), unidirectional polarity alignment with DC rail topology, and SMC package thermal performance on 8mm² copper land.

Technical Context

This TVS operates as a voltage-clamping avalanche diode triggered above its breakdown threshold, diverting surge energy to ground while limiting downstream voltage excursion. Its glass-passivated silicon die ensures stable leakage (<5µA at VRWM) and repeatable clamping behavior across temperature (–55°C to +150°C).

The device complies with IEC-61000-4-2 ESD (30kV air/30kV contact) and JEDEC high-reliability standards, with HBM 8kV, CDM 1kV, and MM 800V ratings. It is rated for non-repetitive 8.3ms half-sine surges up to 300A when mounted on specified 8.00mm² land patterns.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ15A, 3.0SMCJ15A-13 delivers 5× higher surge energy handling for robustness in harsh environments; versus 1.5SMCJ15A, it offers identical clamping performance but differs in JEDEC qualification scope and traceability documentation for automotive PPAP.

Availability

3.0SMCJ15A-13 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O protection, telecom power supplies, and medical DC bus systems requiring stable component supply and full IEC/ISO compliance.

Supply support for 3.0SMCJ15A-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

This part belongs to Diodes' 3.0SMCJ series of high-power TVS diodes, engineered specifically for primary-level surge protection in automotive, industrial, and communications infrastructure where reliability under extreme transient stress is mandatory.

FAQ

What is the maximum clamping voltage of the 3.0SMCJ15A-13 under standard test conditions?

The maximum clamping voltage (VC) is 24.2V when subjected to a 10×1000μs surge waveform at 124.0A peak pulse current, measured per Figure 2 in DS30818 Rev. 18-2. This value is guaranteed across the full operating temperature range (–55°C to +150°C) and defines the upper voltage limit imposed on protected circuitry during surge events.

Is the 3.0SMCJ15A-13 suitable for bidirectional signal line protection?

No - the "A" suffix denotes unidirectional configuration with a cathode band marking. It conducts only in reverse breakdown and blocks forward current beyond its VF (~1.2V). For bidirectional AC or data-line protection, select the "CA" variant (e.g., 3.0SMCJ15CA-13), which has symmetrical breakdown in both polarities.

Does this TVS require derating at elevated ambient temperatures?

Yes - peak pulse power must be linearly derated above +25°C per Figure 1 in the datasheet. At +85°C ambient, maximum PPK drops to ~75% (2250W); at +125°C, it falls to ~45% (1350W). Layout with ≥8.00mm² copper land area is required to maintain specified surge capability.

Can the 3.0SMCJ15A-13 replace older SMCJ15A variants without layout changes?

Yes - it uses the standard SMC (DO-214AB) footprint with identical mechanical dimensions (6.60–7.11mm length, 5.59–6.22mm width, 2.75–3.18mm height) and pad layout recommendations. The "-13" suffix indicates 3000-piece tape-and-reel packaging compatible with standard SMT placement equipment.