Vishay General Semiconductor - Diodes Division TA6F43AHM3_A/I

Overview

TA6F43AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SlimSMA (DO-221AC) package, rated for 43.0 V breakdown voltage (V_BR), 36.8 V stand-off voltage (V_WM), and 600 W peak pulse power (10/1000 µs). It delivers 10.1 A peak pulse current (I_PPM) with 59.3 V clamping voltage (V_C) and operates up to 185 °C junction temperature - designed for automotive sensor line protection against load dump and ESD.

For engineers reviewing the TA6F43AHM3_A/I datasheet, TA6F43AHM3_A/I pinout, TA6F43AHM3_A/I application, or TA6F43AHM3_A/I equivalent, key selection factors include its AEC-Q101 qualification, 30 kV IEC 61000-4-2 ESD rating, MSL Level 1 moisture sensitivity, and 0.95 mm profile enabling high-density automotive PCB layouts.

Technical Context

This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive transients while maintaining low leakage (<1.0 µA at V_WM) across -65 °C to +185 °C operating range. Its thermal resistance junction-to-mount (R_θJM) is 12–15 °C/W, enabling effective heat transfer to PCB copper when mounted per JEDEC 51-14 TDIM test method.

The device features a positive temperature coefficient of V_BR (α_T = 0.092 %/°C), ensuring predictable voltage drift over temperature, and meets halogen-free, RoHS-compliant, and JESD201 Class 2 whisker resistance requirements via HM3 suffix packaging.

Key Specifications

Pinout & Package

SlimSMA (DO-221AC) surface-mount package with cathode band marking on top surface; matte tin-plated terminals solderable per J-STD-002 and JESD22-B102; polarity indicated by color band at cathode end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ43A and SMCJ43A, TA6F43AHM3_A/I uniquely balances AEC-Q101 compliance, 600 W capability, and ultra-low 0.95 mm profile - making it optimal for next-generation compact automotive electronics where board height and reliability are co-constrained.

Availability

TA6F43AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, CAN/LIN bus hardening, and 36 V power rail clamping requiring stable component supply across long production lifecycles.

Supply support for TA6F43AHM3_A/I 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 automotive, industrial, and computing applications.

The TA6F43AHM3_A/I belongs to the PAR® family of surface-mount TVS diodes engineered specifically for high-reliability automotive environments demanding AEC-Q101 qualification, extreme temperature operation, and minimal PCB footprint.

FAQ

What is the clamping voltage of the TA6F43AHM3_A/I at its rated peak pulse current?

The TA6F43AHM3_A/I has a maximum clamping voltage (V_C) of 59.3 V when subjected to its rated peak pulse current (I_PPM) of 10.1 A under a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 89939) and defines the upper voltage limit imposed on protected circuitry during surge events. The TA6F43AHM3_A/I maintains this clamping performance across its full operating temperature range.

Is the TA6F43AHM3_A/I suitable for protecting CAN FD bus lines?

Yes, the TA6F43AHM3_A/I is suitable for CAN FD bus line protection due to its low junction capacitance (<1.0 pF at zero bias), 30 kV IEC 61000-4-2 ESD rating, and precise 36.8 V stand-off voltage that avoids interference with CAN_H recessive level (2.5–3.5 V) and dominant level (0–1.5 V). Its unidirectional configuration allows placement on CAN_H referenced to ground, and the TA6F43AHM3_A/I's 59.3 V clamping threshold prevents damage during battery disconnect transients without distorting signal edges.

Does the TA6F43AHM3_A/I require derating at elevated ambient temperatures?

Yes, the TA6F43AHM3_A/I requires derating above 25 °C ambient temperature. Its power dissipation (P_D) drops from 1.1 W at 25 °C to 0 W at 150 °C per the derating curve in Figure 5 of the datasheet. For example, at 85 °C ambient, P_D is approximately 0.65 W. This thermal behavior is defined by its R_θJA of 120–150 °C/W and must be accounted for in layout design using minimum recommended pad layout per JEDEC 51-2A. The TA6F43AHM3_A/I remains functional up to 185 °C junction temperature regardless of ambient.

What does the "HM3_A/I" suffix indicate in TA6F43AHM3_A/I?

The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant SlimSMA package meeting JESD201 Class 2 whisker resistance, while "A" indicates revision level and "I" specifies 13-inch tape-and-reel packaging with 14,000 units per reel. This differs from "H"-suffixed variants (e.g., TA6F43AHM3_A/H) which use 7-inch reels with 3,500 units. The TA6F43AHM3_A/I is fully interchangeable electrically and mechanically with other HM3-suffix variants of the same voltage grade.

How does the TA6F43AHM3_A/I compare to bidirectional TVS diodes in automotive applications?

The TA6F43AHM3_A/I is unidirectional and optimized for clamping positive transients on grounded-reference lines - such as 36 V power rails or CAN_H - where negative excursions are absent or clamped separately. Unlike bidirectional TVS diodes, it offers lower leakage (<1.0 µA at V_WM) and tighter V_BR tolerance (±5%), improving system stability in precision analog circuits. In applications like sensor signal lines or isolated power domains, the TA6F43AHM3_A/I provides superior noise immunity and thermal efficiency versus bidirectional alternatives with identical V_BR.