Taiwan Semiconductor Corporation SMCJ7.0AH

Overview

SMCJ7.0AH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.78V min / 8.6V max breakdown voltage at 10mA, 10V working stand-off voltage, and 12.0V clamping voltage at 200A peak pulse current. It protects automotive and industrial power rails against ESD, load dump, and lightning-induced transients.

For engineers reviewing the SMCJ7.0AH datasheet, SMCJ7.0AH pinout, SMCJ7.0AH application, or SMCJ7.0AH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, ISO 7637-2 compliance, thermal resistance values, and real-world clamping performance under 10/1000μs surge conditions.

Technical Context

The SMCJ7.0AH employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise time from 0V to V_BR), low leakage (<7μA at 10V), and stable clamping across temperature. Its unidirectional configuration enables integration into DC power lines where polarity is fixed and reverse conduction must be blocked.

Designed for automotive-grade reliability, it meets AEC-Q101 stress tests and ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements. Junction-to-case thermal resistance is 10°C/W, supporting sustained operation up to +150°C junction temperature with appropriate PCB copper area.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ7.0A and SMCJ7.0A, the SMCJ7.0AH provides certified automotive robustness, validated ISO 7637-2 immunity, and superior thermal performance (R_θJC = 10°C/W), making it the only choice for safety-critical 12V rail protection in vehicles.

Availability

SMCJ7.0AH is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply, full AEC-Q101 documentation, and ISO 7637-2 compliance.

Supply support for SMCJ7.0AH 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, and power devices since 1979.

The SMCJ series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and high-reliability packaging for under-hood and factory-floor deployment.

FAQ

What is the clamping voltage of SMCJ7.0AH at its rated peak pulse current?

The SMCJ7.0AH has a maximum clamping voltage (V_C) of 12.0V at 200A peak pulse current (I_PPM) under 10/1000μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 12.0V during worst-case surge events. The SMCJ7.0AH maintains this clamping performance across its full operating temperature range (-55°C to +150°C).

Is SMCJ7.0AH qualified for automotive applications?

Yes, the SMCJ7.0AH is AEC-Q101 qualified and explicitly validated for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity standards and undergoes full automotive stress testing including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. The SMCJ7.0AH is intended for engine control units, body electronics, and ADAS power supplies.

How does SMCJ7.0AH differ from SMCJ7.0H?

The SMCJ7.0AH features tighter breakdown voltage tolerance (7.78–8.6V) versus SMCJ7.0H (7.78–9.51V), resulting in more consistent clamping behavior and reduced margin uncertainty in design. Both share identical package, power rating, and thermal specs, but the 'A' suffix denotes enhanced V_BR binning-critical for designs requiring precise threshold control. The SMCJ7.0AH also carries full AEC-Q101 certification documentation.

What is the maximum steady-state power dissipation for SMCJ7.0AH?

The SMCJ7.0AH has a steady-state power dissipation (P_D) rating of 5W at T_A = 25°C. This value applies only to continuous DC or low-frequency reverse-bias conditions-not surge events. In normal operation, leakage current remains below 7μA at 10V, so actual power dissipation is negligible (<70μW). The 5W rating supports short-term thermal overload scenarios but is not intended for sustained operation.

Does SMCJ7.0AH have polarity marking, and how is it identified?

Yes, the SMCJ7.0AH uses a cathode band marking on the DO-214AB (SMC) package body to indicate polarity. The band corresponds to the cathode terminal, which must be connected to system ground or the lower-potential node in unidirectional configurations. This marking aligns with JEDEC standard orientation and is visible under standard optical inspection. The SMCJ7.0AH's marking code is "GDM", laser-etched adjacent to the cathode band.