Taiwan Semiconductor Corporation SMA6J24AH

Overview

SMA6J24AH from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a 24V working stand-off voltage, 26.7–29.5V breakdown range at 1mA, and 37.8V maximum clamping voltage at 15.9A peak pulse current; designed for automotive-grade overvoltage protection in DC/DC converters and power supplies.

For engineers reviewing the SMA6J24AH datasheet, SMA6J24AH pinout, SMA6J24AH application, or SMA6J24AH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package, 10/1000μs waveform capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and glass-passivated junction for fast response (<1.0ps).

Technical Context

This unidirectional TVS diode operates as a reverse-biased avalanche clamp, activated during transients exceeding VWM = 24V. Its glass-passivated junction ensures stable breakdown behavior and low leakage (≤1.0µA at 24V), while the single-die DO-214AC construction supports automated placement and meets JESD201 Class 2 whisker resistance.

The device delivers 600W peak pulse power under 10/1000μs waveform, clamps to ≤37.8V at 15.9A, and sustains operation across –55°C to +175°C junction temperature. It is rated for 50A non-repetitive forward surge (8.3ms half-sine) and exhibits <1.0ps response time-critical for protecting sensitive automotive electronics against load dump and inductive switching spikes.

Key Specifications

Pinout & Package

DO-214AC (SMA) surface-mount package: molded epoxy case meeting UL 94V-0, matte tin-plated leads solderable per J-STD-002, cathode indicated by band, weight ≈0.060g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMA6J24A and SMC6J24A, the SMA6J24AH uniquely combines AEC-Q101 qualification, DO-214AC form factor, and full ISO 7637-2 compliance-making it the only option qualified for front-end 24V rail protection in production automotive ECUs without layout or qualification compromise.

Availability

SMA6J24AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, and LED lighting drivers requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SMA6J24AH 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 TVS diodes, rectifiers, MOSFETs, and power management devices.

The SMA6JxxAH series was developed specifically for automotive-grade transient suppression, targeting ISO 7637-2 compliance and AEC-Q101 reliability in 24V system architectures used in body electronics and powertrain subsystems.

FAQ

What is the clamping voltage of the SMA6J24AH at its rated peak pulse current?

The SMA6J24AH has a maximum clamping voltage (VC) of 37.8 V at its rated peak pulse current (IPPM) of 15.9 A, measured under the standardized 10/1000μs waveform. This value ensures downstream components connected to the protected 24V rail remain within safe operating limits during transient events. The SMA6J24AH achieves this clamping performance while maintaining sub-1ps response time and AEC-Q101 qualification.

Is the SMA6J24AH suitable for automotive applications?

Yes, the SMA6J24AH is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements, making it appropriate for protecting 24V power rails in body control modules, infotainment systems, and ADAS power supplies. The SMA6J24AH operates reliably from –55°C to +175°C and features a glass-passivated junction for long-term stability in under-hood environments.

What package type does the SMA6J24AH use, and what are its mounting characteristics?

The SMA6J24AH uses the DO-214AC (SMA) surface-mount package: a low-profile, RoHS- and halogen-free molded case with matte tin-plated leads compliant with J-STD-002 solderability. Its compact size supports high-density PCB layouts, and the cathode band provides clear polarity identification. The SMA6J24AH is optimized for automated pick-and-place assembly and requires no pre-bake due to its J-STD-020 Level 1 moisture sensitivity rating.

How does the SMA6J24AH compare to the SMA6J24A in terms of qualification and reliability?

The SMA6J24AH is AEC-Q101 qualified, whereas the SMA6J24A is not. Both share identical electrical specifications (VWM = 24V, VBR = 26.7–29.5V, VC = 37.8V), but only the SMA6J24AH undergoes automotive-specific stress testing-including temperature cycling, humidity bias, and mechanical shock-required for Tier 1 automotive supply. For production ECU designs, the SMA6J24AH is the validated choice; the SMA6J24A remains viable for industrial applications where AEC-Q101 is not mandated.

What is the maximum peak pulse power rating of the SMA6J24AH, and under what conditions is it specified?

The SMA6J24AH has a peak pulse power rating of 600 W, specified under the non-repetitive 10/1000μs double-exponential waveform per R.E.A. standards. This rating applies at TA = 25°C and assumes proper PCB thermal relief. Derating is required above 25°C ambient, as shown in the pulse derating curve (Fig.2). The SMA6J24AH maintains this rating while delivering <1.0ps response time and clamping to ≤37.8V-enabling robust protection in demanding 24V automotive and industrial systems.