Vishay General Semiconductor - Diodes Division SMF6V5A-M3-08

Overview

SMF6V5A-M3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient voltage suppression on high-speed data lines. It features a 7.22 V minimum reverse breakdown voltage, 6.5 V maximum standoff voltage, 20 µA maximum reverse leakage at VRWM, 17.9 A peak pulse current (10/1000 µs), and 11.2 V maximum clamping voltage at IPPM - enabling robust IEC 61000-4-2 ±30 kV contact/air discharge protection in USB 2.0, HDMI, and industrial sensor interfaces.

For engineers reviewing the SMF6V5A-M3-08 datasheet, SMF6V5A-M3-08 pinout, SMF6V5A-M3-08 application, or SMF6V5A-M3-08 equivalent, this device is selected for high-reliability ESD hardening of 5–7 V signal paths where low capacitance (938 pF at 0 V), fast response time, and AEC-Q101 qualification are critical - especially in automotive infotainment, industrial HMI, and medical data acquisition systems.

Technical Context

This diode operates as a unidirectional clamping device with cathode-anode polarity, leveraging silicon avalanche structure to divert ESD transients before downstream ICs sustain damage. Its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 µs surges, while the "Low Noise" technology enables sub-nanosecond response to IEC 61000-4-2 events.

The SMF6V5A-M3-08 is rated for continuous operation from –65 °C to +175 °C, supports wave and reflow soldering per J-STD-020 MSL level 1, and maintains stable clamping performance across its full operating temperature range - making it suitable for under-hood automotive modules and sealed industrial enclosures.

Key Specifications

Pinout & Package

SMF6V5A-M3-08 uses the DO-219AB (SOD-123W-compatible) surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, low-profile, molded UL 94 V-0 compound, with cathode indicated by a bar marking on the top surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with SMAJ6.0A-E3/57T and TPD2E001DRYR, SMF6V5A-M3-08 uniquely balances AEC-Q101 qualification, 938 pF capacitance, and 11.2 V clamping in a compact DO-219AB package - making it the preferred choice for automotive and industrial applications demanding both reliability and signal fidelity.

Availability

SMF6V5A-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and medical data acquisition equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for SMF6V5A-M3-08 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.

The SMF series targets high-speed interface protection with optimized clamping, low capacitance, and AEC-Q101 validation - engineered specifically for ESD-hardened USB, HDMI, and sensor signal chains in harsh environments.

FAQ

What is the maximum clamping voltage of SMF6V5A-M3-08 under IEC 61000-4-2 ESD stress?

The SMF6V5A-M3-08 has a maximum clamping voltage of 11.2 V at 17.9 A (10/1000 µs waveform), which is the peak voltage imposed on the protected line during worst-case ESD events. This value is specified in the Electrical Characteristics table of Vishay's Document 85881 and ensures compatibility with 12 V-tolerant receiver inputs. The SMF6V5A-M3-08 maintains this clamping performance across its full –65 °C to +175 °C operating range.

Is SMF6V5A-M3-08 suitable for bidirectional signal lines like RS-485?

SMF6V5A-M3-08 is a unidirectional diode, but it can protect bidirectional lines when used in a back-to-back configuration (two devices anode-to-anode). In that arrangement, each SMF6V5A-M3-08 handles one polarity of transient, achieving symmetrical ±11.2 V clamping. This method is documented in Vishay application guidance for RS-485 and CAN bus protection, and preserves the SMF6V5A-M3-08's 938 pF capacitance per path.

Does SMF6V5A-M3-08 meet AEC-Q101 requirements for automotive use?

Yes, SMF6V5A-M3-08 is AEC-Q101 qualified per Vishay's documentation (Rev. 2.4, July 2023), including human body model (HBM) Class H3B (>8 kV), temperature cycling, and mechanical shock testing. This qualification confirms its suitability for automotive applications such as infotainment, body control modules, and sensor interfaces where reliability under thermal and mechanical stress is mandatory.

What is the package type and footprint recommendation for SMF6V5A-M3-08?

SMF6V5A-M3-08 uses the DO-219AB (SOD-123W-compatible) package: 3.9 mm × 1.9 mm × 1.08 mm, with cathode marked by a bar. Vishay recommends a footprint with 1.3 mm × 1.3 mm pad width, 2.9 mm pad length, and 1.4 mm center-to-center spacing. The device supports reflow soldering up to 260 °C peak temperature and is rated MSL level 1 per J-STD-020.

How does the 938 pF capacitance of SMF6V5A-M3-08 affect USB 2.0 signal integrity?

The 938 pF typical capacitance of SMF6V5A-M3-08 at 0 V is measured across the diode junction and directly loads the signal line. For USB 2.0 (480 Mbps), this value is within acceptable limits when placed close to the connector with minimized trace length - preserving eye diagram margins per USB-IF compliance tests. The SMF6V5A-M3-08's low incremental surge resistance further reduces ringing, making it viable for full-speed USB implementations where robustness outweighs ultra-low-capacitance requirements.