Vishay General Semiconductor - Diodes Division 1.5SMC8.2AHE3_A/H

Overview

1.5SMC8.2AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 7.02 V standoff voltage (V_WM), 7.79–8.61 V breakdown voltage (V_BR) at 10 mA, 12.1 V clamping voltage (V_C) at 200 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power rail protection.

For engineers reviewing the 1.5SMC8.2AHE3_A/H datasheet, 1.5SMC8.2AHE3_A/H pinout, 1.5SMC8.2AHE3_A/H application, or 1.5SMC8.2AHE3_A/H equivalent, key selection criteria include clamping performance under 200 A surge, AEC-Q101 qualification status, SMC (DO-214AB) package thermal resistance (R_θJA = 75 °C/W), and unidirectional polarity marking for cathode identification.

Technical Context

This TVS diode operates as a clamping device that transitions from high-impedance standby to low-impedance conduction when reverse voltage exceeds V_BR, limiting transient energy to protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMC package supports automated placement and meets MSL level 1 per J-STD-020.

The 1.5SMC8.2AHE3_A/H is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It exhibits a temperature coefficient of V_BR of +0.065 %/°C and maximum reverse leakage of 200 μA at V_WM, enabling reliable operation across -65 °C to +150 °C junction temperature range.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by black band on body end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ8.0A and 1.5KE8.2A, the 1.5SMC8.2AHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity in an SMT package, and industry-leading thermal performance (R_θJA = 75 °C/W), making it the preferred choice for production automotive and high-reliability industrial applications requiring zero layout change and full compliance traceability.

Availability

1.5SMC8.2AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom power-over-Ethernet systems requiring stable component supply, full AEC-Q101 documentation, and RoHS/halogen-free compliance.

Supply support for 1.5SMC8.2AHE3_A/H 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The 1.5SMC Series was developed to deliver high-power transient suppression in compact SMT packages for automotive, industrial, and telecom applications where AEC-Q101 compliance, low clamping voltage, and repeatable surge endurance are mandatory.

FAQ

What is the clamping voltage of the 1.5SMC8.2AHE3_A/H at its rated peak pulse current?

The 1.5SMC8.2AHE3_A/H has a maximum clamping voltage (V_C) of 12.1 V when subjected to its rated 200 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and reflects the actual voltage imposed on protected circuitry during worst-case surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.

Is the 1.5SMC8.2AHE3_A/H AEC-Q101 qualified, and what does that mean for automotive use?

Yes, the 1.5SMC8.2AHE3_A/H is AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in Vishay's official documentation. This qualification means the device has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its suitability for automotive powertrain, chassis, and body electronics - unlike commercial-grade TVS diodes that lack this validation.

How does the 1.5SMC8.2AHE3_A/H differ from bidirectional variants like 1.5SMC8.2CA?

The 1.5SMC8.2AHE3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse voltage must be blocked. In contrast, 1.5SMC8.2CA is bidirectional, symmetrical in both directions, and used for AC or floating signal lines. Their V_BR, V_C, and P_PPM values are identical, but circuit integration - especially grounding and biasing - differs fundamentally between the two types.

What is the thermal resistance and recommended pad layout for optimal performance of the 1.5SMC8.2AHE3_A/H?

The 1.5SMC8.2AHE3_A/H has 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, as specified in the Vishay datasheet. Deviating from this pad size increases thermal impedance and may cause premature thermal failure during repetitive surges - so PCB layout must strictly follow the recommended SMC (DO-214AB) mounting footprint.

Can the 1.5SMC8.2AHE3_A/H replace older 1.5KE8.2A parts in existing designs?

The 1.5SMC8.2AHE3_A/H cannot serve as a direct drop-in replacement for the through-hole 1.5KE8.2A due to its SMC (DO-214AB) surface-mount package, different land pattern, and reflow-only assembly process. While electrical parameters match closely, mechanical incompatibility requires PCB redesign. For migration, verify thermal performance, surge coordination with upstream fuses, and ensure AEC-Q101 compliance adds value to the target application.