Vishay General Semiconductor - Diodes Division P6SMB7.5CA-M3/52

Overview

P6SMB7.5CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 7.5 V standoff voltage (VWM), 11.3 V maximum clamping voltage at 53.1 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.

For engineers reviewing the P6SMB7.5CA-M3/52 datasheet, P6SMB7.5CA-M3/52 pinout, P6SMB7.5CA-M3/52 application, or P6SMB7.5CA-M3/52 equivalent, key selection criteria include bidirectional clamping performance, low clamping ratio (VC/VWM = 1.51), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT assembly on standard PCB pad layouts.

Technical Context

This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior in forward and reverse directions per JESD22-A114 test conditions. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<500 μA at 6.4 V), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design (0.2" × 0.2") for sustained 5.0 W power dissipation.

The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports repetitive surge duty cycles up to 0.01%, and exhibits a temperature coefficient of VBR at +0.061 %/°C - enabling predictable voltage clamping over -65 °C to +150 °C operating range without polarity marking on the case.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking required. Case dimensions: 0.220" × 0.130" × 0.096" (5.59 mm × 3.30 mm × 2.44 mm); matte tin-plated terminals, solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ7.5CA-T, P6SMB7.5CA-M3/52 offers halogen-free construction and MSL Level 1 reflow assurance; compared with 1.5SMC7.5CA, it provides identical clamping performance in a space-constrained SMB footprint - making it optimal for high-density industrial and automotive PCBs.

Availability

P6SMB7.5CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter designs requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified alternatives.

Supply support for P6SMB7.5CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.

The P6SMB Series belongs to Vishay's TRANSZORB® TVS portfolio, engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where ESD, EFT, and surge immunity are mission-critical.

FAQ

What is the clamping voltage of P6SMB7.5CA-M3/52 at its rated peak pulse current?

The P6SMB7.5CA-M3/52 has a maximum clamping voltage (VC) of 11.3 V at 53.1 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during a standardized surge event - critical for verifying compatibility with downstream IC voltage tolerances.

Is P6SMB7.5CA-M3/52 suitable for automotive applications?

Yes, P6SMB7.5CA-M3/52 is halogen-free and RoHS-compliant, and the P6SMB7.5CA-M3/52 variant is qualified to AEC-Q101 when ordered with HM3 suffix (e.g., P6SMB7.5CAHM3_B/H). While the base M3/52 part is commercial-grade, its -65 °C to +150 °C operating range, MSL Level 1 rating, and robust surge performance make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment interfaces.

How does the bidirectional design of P6SMB7.5CA-M3/52 affect circuit layout?

The bidirectional design of P6SMB7.5CA-M3/52 eliminates polarity marking - no cathode band is present, and either terminal functions identically. This simplifies PCB layout for AC-coupled or floating lines (e.g., RS-485, CAN FD), removes orientation verification during assembly, and avoids misplacement errors in high-volume SMT production - unlike unidirectional variants such as P6SMB7.5A-M3/52.

What is the thermal resistance of P6SMB7.5CA-M3/52, and how does it impact PCB design?

P6SMB7.5CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To sustain its 5.0 W steady-state power dissipation, designers must allocate adequate copper area and consider airflow or adjacent heat sources - undersized pads increase junction temperature and reduce surge endurance over repeated events.

Does P6SMB7.5CA-M3/52 meet industry surge immunity standards like IEC 61000-4-5?

P6SMB7.5CA-M3/52 is rated for 600 W peak pulse power with 10/1000 μs waveform - matching the energy profile of IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) when properly mounted. While the device itself is not certified to the full standard, its parameters enable system-level compliance when combined with appropriate PCB layout (0.2" × 0.2" pads), series impedance, and coordination with upstream GDTs or MOVs in multi-stage protection schemes.