Vishay General Semiconductor - Diodes Division P6SMB480A-M3/52

Overview

P6SMB480A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for high-energy surge protection with 600 W peak pulse power (10/1000 μs), 456 V to 504 V breakdown voltage (V_BR), and 408 V maximum standoff voltage (V_WM). It clamps transients up to 658 V at 0.91 A peak pulse current and is used to protect power rails and input stages of industrial power supplies and telecom rectifiers.

For engineers reviewing the P6SMB480A-M3/52 datasheet, P6SMB480A-M3/52 pinout, P6SMB480A-M3/52 application, or P6SMB480A-M3/52 equivalent, key selection criteria include its 408 V working voltage, unidirectional polarity, halogen-free RoHS-compliant M3 suffix, 150 °C max junction temperature, and compatibility with automated SMT placement on standard PCB pads.

Technical Context

This TVS diode operates as a clamping device in reverse-biased configuration, triggering when transient voltage exceeds V_BR (456–504 V) and limiting downstream voltage to ≤658 V at rated IPPM. Its glass-passivated junction ensures stable leakage (<1.0 μA at V_WM) and fast response time (<1.0 ns).

Thermal performance is defined by R_θJA = 100 °C/W (on 0.2" × 0.2" copper pads) and R_θJL = 20 °C/W, enabling reliable operation up to 150 °C junction temperature. The device meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, dimensions 0.220" × 0.130" × 0.086" (5.59 mm × 3.30 mm × 2.20 mm). Cathode band denotes terminal polarity for unidirectional operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ480A and 1.5SMC480A, P6SMB480A-M3/52 delivers optimal balance of compact SMB footprint, halogen-free compliance, and precise 408 V standoff for 400–500 V DC systems-making it preferred for space-constrained telecom rectifiers and industrial power supplies where MSL Level 1 reflow and automated placement are critical.

Availability

P6SMB480A-M3/52 is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom rectifier DC bus protection, renewable energy inverter DC link protection, and HV battery system rail-to-rail surge suppression requiring stable component supply and halogen-free compliance.

Supply support for P6SMB480A-M3/52 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.

The P6SMB Series was developed for high-reliability, surface-mount transient suppression in industrial, telecom, and automotive power systems-prioritizing low-profile packaging, automated assembly compatibility, and consistent clamping performance across temperature.

FAQ

What is the maximum clamping voltage of P6SMB480A-M3/52 under a 10/1000 μs surge?

The P6SMB480A-M3/52 clamps to a maximum of 658 V when subjected to its rated peak pulse current of 0.91 A under the standardized 10/1000 μs waveform. This value is measured at T_A = 25 °C with devices mounted on 0.2" × 0.2" copper pads per the Vishay datasheet. The P6SMB480A-M3/52 maintains this clamping performance across its full operating temperature range, supporting robust overvoltage protection in high-voltage DC systems.

Is P6SMB480A-M3/52 suitable for automotive applications?

P6SMB480A-M3/52 is not AEC-Q101 qualified; it carries the commercial-grade M3 suffix (halogen-free, RoHS-compliant) but lacks automotive qualification. For automotive use, Vishay offers the P6SMB480AHM3_D/H variant, which adds AEC-Q101 qualification and is marked with the "D" suffix. The P6SMB480A-M3/52 remains appropriate for industrial, telecom, and renewable energy applications where AEC-Q101 is not mandated.

What does the "/52" in P6SMB480A-M3/52 indicate?

The "/52" suffix in P6SMB480A-M3/52 specifies the packaging format: 7-inch diameter plastic tape and reel containing 750 units. This delivery mode supports high-speed automated pick-and-place assembly. The base part number P6SMB480A-M3 denotes the halogen-free, RoHS-compliant commercial-grade TVS; the /52 suffix is purely logistical and does not affect electrical or thermal specifications of the P6SMB480A-M3/52 device.

How does the thermal resistance of P6SMB480A-M3/52 impact PCB layout?

The P6SMB480A-M3/52 has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. To maintain T_J ≤ 150 °C under worst-case power dissipation, PCB layout must provide adequate copper area and avoid excessive trace length or isolation. The P6SMB480A-M3/52 requires no additional heatsinking for intermittent surge duty but benefits from thermal vias under pads in high-ambient environments.

Can P6SMB480A-M3/52 be used in bidirectional configurations?

No, P6SMB480A-M3/52 is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Bidirectional variants use the "CA" suffix (e.g., P6SMB480CA) and exhibit symmetrical clamping in both polarities. The P6SMB480A-M3/52 features a cathode band marking and conducts only in reverse bias; using it in bidirectional circuits would result in forward conduction and potential failure. Always verify polarity marking and suffix before integration.