Vishay General Semiconductor - Diodes Division P6SMB540A-E3/5B

Overview

P6SMB540A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-voltage transient protection in power rails and DC bus lines. It features a 540 V breakdown voltage (V_BR), 459 V stand-off voltage (V_WM), 740 V maximum clamping voltage (V_C) at 0.81 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - suitable for protecting industrial motor drives and HVDC power supplies.

For engineers reviewing the P6SMB540A-E3/5B datasheet, P6SMB540A-E3/5B pinout, P6SMB540A-E3/5B application, or P6SMB540A-E3/5B equivalent, key selection criteria include its 459 V working voltage, unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification eligibility (via D-suffix variants), and thermal resistance of 100 °C/W junction-to-ambient.

Technical Context

This TVS diode operates as a voltage-clamped crowbar device triggered by overvoltage events exceeding its 459 V reverse stand-off threshold. Its glass-passivated junction ensures stable leakage (<1.0 μA at V_WM) and fast response time (<1.0 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching transients on high-voltage DC lines.

The device sustains repetitive 600 W pulses at 0.01% duty cycle when mounted on 5.0 mm × 5.0 mm copper pads, with thermal derating above 25 °C per Fig. 2. Its 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity support reflow-compatible automated assembly without pre-baking.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, 260 °C peak reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ540A and 1.5KE540A, the P6SMB540A-E3/5B delivers superior 600 W surge capacity in an SMT-optimized SMB package with RoHS-compliant matte tin terminations and verified reflow robustness - making it the preferred choice for volume-manufactured industrial and automotive power systems.

Availability

P6SMB540A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, EV auxiliary power units, renewable energy inverters, and telecom rectifier modules requiring stable component supply and full traceability.

Supply support for P6SMB540A-E3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.

The P6SMB Series targets high-energy transient suppression in demanding environments - engineered for industrial automation, automotive subsystems, and renewable energy infrastructure where robustness and repeatable clamping behavior are critical.

FAQ

What is the maximum clamping voltage of the P6SMB540A-E3/5B under a 10/1000 μs surge?

The P6SMB540A-E3/5B has a maximum clamping voltage (V_C) of 740 V when subjected to a 10/1000 μs waveform at 0.81 A peak pulse current. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The P6SMB540A-E3/5B maintains this clamping performance across its specified operating temperature range and is validated using the test conditions outlined in Vishay document 88370.

Is the P6SMB540A-E3/5B RoHS-compliant and halogen-free?

Yes, the P6SMB540A-E3/5B carries the "E3" suffix, indicating it is RoHS-compliant per EU Directive 2011/65/EU and meets Vishay's commercial-grade material specifications. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., P6SMB540A-M3/5B) must be selected. Both E3 and M3 versions satisfy JESD201 Class 2 whisker resistance and J-STD-002 solderability requirements.

Does the P6SMB540A-E3/5B have AEC-Q101 qualification?

The base P6SMB540A-E3/5B is not AEC-Q101 qualified; however, Vishay offers AEC-Q101-qualified versions under the "D" suffix (e.g., P6SMB540AHM3_D/I). These variants undergo extended reliability testing including HTOL, temperature cycling, and unbiased HAST. The P6SMB540A-E3/5B itself is rated for industrial temperature range (–65 °C to +150 °C) and MSL Level 1, but automotive qualification requires explicit D-suffix ordering.

What is the thermal resistance of the P6SMB540A-E3/5B, and how does it affect layout?

The P6SMB540A-E3/5B has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's package drawing. To maintain safe junction temperatures during repetitive surges, designers must ensure adequate copper area and avoid thermal bottlenecks - the P6SMB540A-E3/5B's thermal performance directly impacts its ability to sustain multiple 600 W pulses.

Can the P6SMB540A-E3/5B be used in bidirectional configurations?

No, the P6SMB540A-E3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., P6SMB540CA). Using the P6SMB540A-E3/5B in reverse-biased AC applications would result in forward conduction and failure. For symmetrical surge protection, select a CA-part or pair two unidirectional devices in series opposition - but the P6SMB540A-E3/5B itself is strictly unidirectional.