Vishay General Semiconductor - Diodes Division SM6T7V5CAHM3/H

Overview

SM6T7V5CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 7.13 V minimum breakdown voltage (V_BR), 6.40 V stand-off voltage (V_WM), 11.3 V maximum clamping voltage (V_C) at 53.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.

For engineers reviewing the SM6T7V5CAHM3/H datasheet, SM6T7V5CAHM3/H pinout, SM6T7V5CAHM3/H application, or SM6T7V5CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (V_C/V_BR ≈ 1.59), halogen-free RoHS compliance, and SMB package compatibility with automated SMT assembly.

Technical Context

The SM6T7V5CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<500 μA at V_WM), while the low-inductance SMB package supports fast response to ESD and lightning-induced surges.

Rated for 150 °C maximum junction temperature and MSL Level 1 (260 °C reflow peak), it delivers 600 W transient power handling under standardized 10/1000 μs pulses. The device is qualified to AEC-Q101 and marked with HM3 suffix indicating halogen-free, RoHS-compliant, automotive-grade construction.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, 0.220" × 0.130" body size, MSL Level 1 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ7.5CA and 1.5KE7.5CA, the SM6T7V5CAHM3/H uniquely combines AEC-Q101 qualification, 600 W pulse rating, and SMB footprint - enabling drop-in replacement in automotive PCBs where space, reliability, and regulatory compliance are jointly constrained.

Availability

SM6T7V5CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line drivers, and consumer USB interface protection requiring stable component supply and full traceability.

Supply support for SM6T7V5CAHM3/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 high-reliability and automotive-grade performance.

The SM6T Series was developed specifically for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 validation are mandatory.

FAQ

What does the "CA" suffix indicate in SM6T7V5CAHM3/H?

The "CA" suffix in SM6T7V5CAHM3/H denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities. Unlike unidirectional variants (e.g., SM6T7V5A), this version has no cathode marking and is used where AC signals or differential lines require symmetrical protection without polarity constraints. The SM6T7V5CAHM3/H achieves this via dual-avalanche junction design.

Is SM6T7V5CAHM3/H suitable for automotive applications?

Yes, SM6T7V5CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix, confirming halogen-free, RoHS-compliant, automotive-grade construction. It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock, making it appropriate for engine control units, ADAS camera modules, and body electronics where transient immunity and long-term reliability are critical.

What is the maximum clamping voltage of SM6T7V5CAHM3/H and under what test condition?

The maximum clamping voltage (V_C) of SM6T7V5CAHM3/H is 11.3 V, measured at 53.0 A peak pulse current using the standardized 10/1000 μs double-exponential waveform. This value reflects worst-case voltage seen by protected circuitry during surge events and is guaranteed across the full operating temperature range (–65 °C to +150 °C).

How does the SMB package of SM6T7V5CAHM3/H compare to SMA or SMC in terms of thermal performance?

The SMB (DO-214AA) package of SM6T7V5CAHM3/H offers a thermal resistance of R_θJA = 100 °C/W (typical) on 0.2" × 0.2" copper pads - intermediate between smaller SMA (R_θJA ≈ 125 °C/W) and larger SMC (R_θJA ≈ 65 °C/W). Its 600 W rating assumes proper pad layout per Vishay's recommended mounting footprint, balancing compact size with adequate power dissipation for most board-level protection roles.

Does SM6T7V5CAHM3/H have a specified junction capacitance, and how does it affect high-speed signal lines?

Yes, SM6T7V5CAHM3/H exhibits typical junction capacitance of 300 pF at 0 V bias (measured at 1 MHz), which increases slightly at reverse bias near V_WM. While acceptable for RS-485, CAN, or audio lines, this capacitance may attenuate signals above ~10 MHz; for USB 2.0 or HDMI, lower-capacitance TVS arrays or specialized ESD suppressors are preferred. The SM6T7V5CAHM3/H remains optimal for sub-10 Mbps interfaces where robustness outweighs ultra-low capacitance needs.