Vishay General Semiconductor - Diodes Division SMCG64A-E3/9AT

Overview

SMCG64A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with a standoff voltage of 64 V, breakdown voltage range of 71.1–78.6 V at 1 mA, peak pulse power rating of 1500 W (10/1000 µs), clamping voltage of 103 V at 14.6 A, and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs and signal lines in power supply rails and sensor interfaces.

For engineers reviewing the SMCG64A-E3/9AT datasheet, SMCG64A-E3/9AT pinout, SMCG64A-E3/9AT application, or SMCG64A-E3/9AT equivalent, this page delivers verified electrical specs, package dimensions, clamping behavior under surge, thermal resistance (R_θJA = 75 °C/W), and AEC-Q101 compliance status - all critical for ESD/surge protection design in automotive and industrial systems.

Technical Context

The SMCG64A-E3/9AT operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its V_BR (min 71.1 V), then clamping transients to ≤103 V at 14.6 A. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at 64 V).

Designed for high-energy transient suppression, it handles non-repetitive 8.3 ms half-sine surges up to 200 A (I_FSM) and dissipates 6.5 W continuously at T_A = 50 °C. The DO-215AB package supports automated placement and meets UL 94 V-0 flammability requirements.

Key Specifications

Pinout & Package

Package: SMCG (DO-215AB) - low-profile, surface-mount gull-wing package with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band on unidirectional devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ64A-E3/57T and SMCJ64A-E3/9AT, the SMCG64A-E3/9AT delivers optimal balance of 1500 W surge capability, compact DO-215AB footprint, and AEC-Q101 qualification - making it ideal for space-constrained automotive modules requiring validated reliability without over-spec'ing surge margin.

Availability

SMCG64A-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply and full traceability.

Supply support for SMCG64A-E3/9AT 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

Vishay General Semiconductor designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, efficiency, and application-specific performance.

The SMCG series targets high-energy transient suppression in automotive, industrial, and telecom systems, combining AEC-Q101 qualification, low-profile packaging, and precise clamping for robust system-level ESD and surge protection.

FAQ

What is the clamping voltage of the SMCG64A-E3/9AT under a 10/1000 µs surge?

The SMCG64A-E3/9AT clamps to a maximum of 103 V at its rated peak pulse current of 14.6 A under a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The SMCG64A-E3/9AT achieves this clamping performance while maintaining low incremental resistance, ensuring consistent protection across its operational lifetime.

Is the SMCG64A-E3/9AT qualified for automotive applications?

Yes, the SMCG64A-E3/9AT is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body control modules, and ADAS sensor interfaces. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and surge robustness. The SMCG64A-E3/9AT's qualification applies specifically to the E3 suffix variant, which denotes RoHS-compliant industrial grade construction with matte tin plating.

What package type does the SMCG64A-E3/9AT use, and what are its key mechanical features?

The SMCG64A-E3/9AT uses the SMCG (DO-215AB) surface-mount package - a low-profile gull-wing outline with 0.220–0.245 inch body width and 0.038–0.058 inch lead span. Key features include UL 94 V-0 compliant molding compound, matte tin-plated leads meeting J-STD-002 solderability, and MSL Level 1 rating for unlimited floor life. The SMCG64A-E3/9AT's cathode is marked by a visible band on the device body.

How does the SMCG64A-E3/9AT differ from the SMCG64CA bidirectional variant?

The SMCG64A-E3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where reverse voltage blocking is required. In contrast, SMCG64CA is bidirectional, has no polarity marking, and suppresses transients in both directions - suitable for AC-coupled or floating signal lines. Their V_BR, V_C, and P_PPM ratings are identical, but the SMCG64A-E3/9AT supports forward conduction and I_FSM (200 A), unlike the CA version.

What is the maximum junction temperature and thermal resistance of the SMCG64A-E3/9AT?

The SMCG64A-E3/9AT has a maximum junction temperature (T_J) of 150 °C and a typical junction-to-ambient thermal resistance (R_θJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This R_θJA value assumes standard JEDEC test board conditions and guides PCB layout decisions for thermal management. The SMCG64A-E3/9AT's thermal performance supports continuous operation in under-hood automotive environments and sealed industrial enclosures.