Taiwan Semiconductor Corporation SMA6J24A R3G

Overview

SMA6J24A R3G from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a working standoff voltage of 24 V, breakdown voltage range 26.7–29.5 V at 1 mA, and clamping voltage of 37.8 V at 15.9 A peak pulse current under 10/1000 µs waveform. It is designed for overvoltage protection in DC/DC converters and automotive power supplies.

For engineers reviewing the SMA6J24A R3G datasheet, SMA6J24A R3G pinout, SMA6J24A R3G application, or SMA6J24A R3G equivalent, key selection criteria include its DO-214AC (SMA) package, unidirectional polarity, ISO 7637-2 compliance, 175°C maximum junction temperature, and 1.0 µA reverse leakage at 24 V.

Technical Context

This unidirectional TVS diode operates as a clamping device in parallel with sensitive circuitry to divert surge energy during transients such as load dump or inductive switching. Its glass-passivated junction ensures stable breakdown behavior and low leakage, while the fast response time (<1.0 ps) enables effective suppression of nanosecond-scale ESD and EFT events.

The SMA6J24A R3G is rated for 600 W peak pulse power (10/1000 µs), supports 50 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across –55°C to +175°C junction temperature range-making it suitable for under-hood automotive and industrial power rail protection.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMA6J24A R3G, the Vishay alternative offers identical electrical performance but higher leakage, while the ON Semiconductor part requires mechanical redesign due to DO-214AA packaging-neither is pin-compatible, but both serve the same functional role in 24 V transient suppression.

Availability

SMA6J24A R3G is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC/DC converter input stages, and LED driver overvoltage clamp applications requiring stable component supply and full traceability.

Supply support for SMA6J24A R3G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning devices.

The SMA6J series is engineered specifically for robust, high-reliability transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where sustained temperature extremes and repetitive surge exposure demand proven junction stability and package integrity.

FAQ

What is the maximum clamping voltage of the SMA6J24A R3G at its rated peak pulse current?

The SMA6J24A R3G has a maximum clamping voltage (V_C) of 37.8 V when subjected to its rated peak pulse current of 15.9 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMA6J24A R3G maintains this clamping performance across its specified operating temperature range.

Is the SMA6J24A R3G unidirectional or bidirectional, and how is polarity identified?

The SMA6J24A R3G is a unidirectional TVS diode, intended for DC rail protection where reverse voltage is not expected. Polarity is indicated by a cathode band on the DO-214AC (SMA) package body. During circuit design, the cathode must be connected to the protected line (e.g., 24 V supply), and the anode to ground. The SMA6J24A R3G does not conduct in reverse bias until breakdown voltage is exceeded.

Does the SMA6J24A R3G meet automotive transient immunity standards?

Yes, the SMA6J24A R3G meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical disturbances. Its 600 W peak pulse power rating and verified clamping behavior under standardized waveforms make it suitable for protecting ECUs, body controllers, and infotainment power supplies. The SMA6J24A R3G is qualified for operation up to +175°C junction temperature, aligning with under-hood automotive requirements.

What is the moisture sensitivity level (MSL) and reflow profile compatibility of the SMA6J24A R3G?

The SMA6J24A R3G has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions and is compatible with standard Pb-free reflow profiles without pre-baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the UL 94V-0 molding compound withstands peak reflow temperatures up to 260°C. The SMA6J24A R3G supports automated placement and standard SMT assembly processes.

How does the SMA6J24A R3G compare to the SMA6J22A and SMA6J26A in terms of voltage ratings?

The SMA6J24A R3G has a working standoff voltage (V_WM) of 24 V, with breakdown voltage (V_BR) ranging from 26.7 V to 29.5 V. In comparison, the SMA6J22A offers V_WM = 22 V (V_BR = 24.4–26.9 V), and the SMA6J26A offers V_WM = 26 V (V_BR = 28.9–31.9 V). All three share identical 600 W power rating, DO-214AC package, and thermal specifications. Selection depends strictly on system nominal voltage and required margin above V_WM; the SMA6J24A R3G is optimized for 24 V nominal rails.