Vishay 6DFN24A-M3/H

Overview

6DFN24A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, rated for 24 V nominal breakdown voltage (V_BR = 22.8–25.2 V), 20.5 V stand-off voltage (V_WM), 33.2 V clamping voltage at 18.1 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It protects MOSFETs and ICs in industrial sensor signal lines against lightning-induced transients.

For engineers reviewing the 6DFN24A-M3/H datasheet, 6DFN24A-M3/H pinout, 6DFN24A-M3/H application, or 6DFN24A-M3/H equivalent, this page delivers verified electrical parameters, AOI-compatible DFN3820A package details, thermal resistance values (R_θJA = 140–175 °C/W), ESD immunity (30 kV contact/air), and direct alternative part comparisons for circuit protection design.

Technical Context

This unidirectional TVS diode uses passivated anisotropic rectifier technology to deliver precise clamping with low leakage (<1.0 μA at V_WM) and high surge robustness. Its DFN3820A footprint enables automated placement and supports AOI via side-wettable flanks.

It operates across -65 °C to +175 °C junction temperature range, features 0.085 %/°C V_BR temperature coefficient, and meets MSL Level 1 (260 °C reflow peak) and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: DFN3820A - leadless, low-profile (0.88 mm typical height), side-wettable flanks for AOI, halogen-free, RoHS-compliant, matte tin-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ24A and SMCJ24A, the 6DFN24A-M3/H delivers identical clamping performance in a 3.95 mm × 2.18 mm DFN3820A package with AOI support and lower thermal resistance to mount, making it optimal for space-constrained, high-reliability industrial and automotive PCBs where inspection and thermal management are critical.

Availability

6DFN24A-M3/H is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial PLC I/O protection, and medical patient monitor signal lines requiring stable component supply and AEC-Q101 qualified reliability.

Supply support for 6DFN24A-M3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, industry-qualified components for demanding environments.

The 6DFN24A-M3/H belongs to Vishay's TRANSZORB® DFN family, engineered specifically for compact, high-density PCB layouts in automotive, industrial, and medical systems requiring robust, AOI-ready transient protection without sacrificing thermal performance.

FAQ

What is the clamping voltage of the 6DFN24A-M3/H at its rated peak pulse current?

The 6DFN24A-M3/H has a maximum clamping voltage (V_C) of 33.2 V at its rated peak pulse current (I_PPM) of 18.1 A under the 10/1000 μs waveform condition. This value is measured per Figure 1 in the official Vishay datasheet (Doc #98464, Rev. 10-Nov-2023) and defines the upper voltage limit imposed on protected circuits during surge events. The 6DFN24A-M3/H maintains this clamping performance across its full operating temperature range.

Is the 6DFN24A-M3/H suitable for automotive applications?

Yes, the 6DFN24A-M3/H is AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code. It undergoes stress testing for high-temperature operating life, temperature cycling, and ESD per automotive standards. Its -65 °C to +175 °C operating junction temperature range and 30 kV IEC 61000-4-2 ESD immunity make the 6DFN24A-M3/H appropriate for under-hood and cabin automotive modules such as sensor interfaces and body control units.

Does the 6DFN24A-M3/H require special PCB layout considerations?

Yes - the 6DFN24A-M3/H uses an exposed anode pad (heatsink) that must be connected to a minimum 40 mm² copper area for effective thermal dissipation. The DFN3820A footprint requires precise stencil design for side-wettable flanks to ensure AOI visibility. Avoid thermal relief on the anode pad; use solid copper connection to maximize R_θJM benefit (5–6.5 °C/W). The 6DFN24A-M3/H layout must follow Vishay's recommended mounting pad dimensions in Document #98464, page 5.

How does the 6DFN24A-M3/H compare to SMAJ24A in terms of surge handling?

The 6DFN24A-M3/H and SMAJ24A share identical V_BR (24 V), V_WM (20.5 V), and V_C (33.2 V) specifications but differ in package and thermal performance. The 6DFN24A-M3/H offers lower R_θJA (140–175 °C/W vs. 190 °C/W for SMAJ24A) and side-wettable flanks for AOI. Both handle 600 W (10/1000 μs), but the 6DFN24A-M3/H achieves this in a 3.95 mm × 2.18 mm footprint versus SMAJ24A's 4.5 mm × 2.7 mm DO-214AC outline.

What is the meaning of the "M3/H" suffix in 6DFN24A-M3/H?

The "M3" denotes halogen-free, RoHS-compliant, Pb-free terminations meeting JESD201 Class 2 whisker resistance, while "H" indicates AEC-Q101 qualification. Together, "M3/H" certifies the 6DFN24A-M3/H for high-reliability automotive and industrial use with environmentally compliant materials and rigorous stress testing. This dual suffix is defined in the Ordering Information Table on page 3 of Vishay Document #98464.