Vishay General Semiconductor - Diodes Division P6SMB22AHE3_B/H

Overview

P6SMB22AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 22 V breakdown voltage (V_BR = 20.9–23.1 V at I_T = 1.0 mA), 18.8 V stand-off voltage (V_WM), 30.6 V maximum clamping voltage (V_C) at 19.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.

For engineers reviewing the P6SMB22AHE3_B/H datasheet, P6SMB22AHE3_B/H pinout, P6SMB22AHE3_B/H application, or P6SMB22AHE3_B/H equivalent, this AEC-Q101 qualified TVS offers validated surge immunity for 12 V and 24 V DC systems, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive electronics design and production validation.

Technical Context

The P6SMB22AHE3_B/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold, with fast response time (<1 ns) and low clamping ratio (V_C/V_BR ≈ 1.32). Its glass-passivated junction ensures stable leakage performance and robust surge endurance under repetitive 10/1000 μs pulses at 0.01% duty cycle.

Thermally, it exhibits R_θJA = 100 °C/W (typ.) and R_θJL = 20 °C/W (typ.), enabling reliable operation up to T_J = +150 °C. The cathode band marking identifies polarity, and matte tin-plated leads meet J-STD-002 solderability standards for automated SMT assembly.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 3.94 mm × 2.20 mm × 1.52 mm (L × W × H); terminals are matte tin-plated for J-STD-002-compliant solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A-E3/5B and 1.5SMC22A, the P6SMB22AHE3_B/H delivers optimal balance of 600 W surge capacity, AEC-Q101 qualification, and SMB footprint - making it the preferred choice for automotive body control modules and industrial PLCs requiring validated reliability without layout redesign.

Availability

P6SMB22AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC-DC converter designs requiring stable component supply, AEC-Q101 compliance, and repeatable surge protection performance.

Supply support for P6SMB22AHE3_B/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under harsh thermal and electrical stress while meeting stringent automotive qualification standards.

FAQ

What is the maximum clamping voltage of the P6SMB22AHE3_B/H under rated surge conditions?

The P6SMB22AHE3_B/H has a maximum clamping voltage (V_C) of 30.6 V at 19.6 A peak pulse current (I_PPM) with a 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components see no more than 30.6 V during a full 600 W transient event. The P6SMB22AHE3_B/H maintains this clamping performance across its specified operating temperature range (−65 °C to +150 °C).

Is the P6SMB22AHE3_B/H suitable for automotive applications?

Yes, the P6SMB22AHE3_B/H is AEC-Q101 qualified, as indicated by the "HE3_B" suffix, confirming compliance with automotive stress testing including high-temperature reverse bias, temperature cycling, and highly accelerated life testing. It is explicitly rated for under-hood and powertrain applications where reliability under thermal and electrical stress is mandatory - making the P6SMB22AHE3_B/H appropriate for engine control units, lighting modules, and ADAS power supplies.

What does the "_B/H" suffix mean in P6SMB22AHE3_B/H?

The "_B" denotes AEC-Q101 qualification for the P6SMB22AHE3_B/H series (covering P6SMB6.8A to P6SMB220A), while "/H" specifies packaging in 7-inch plastic tape and reel with 750 units per reel. This ordering code confirms the part meets automotive reliability standards and ships in industry-standard SMT-compatible format - essential for high-volume automated assembly of the P6SMB22AHE3_B/H in Tier 1 automotive production lines.

How does the P6SMB22AHE3_B/H compare to bidirectional TVS diodes like P6SMB22CA?

The P6SMB22AHE3_B/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., 12 V supply to ground), offering lower leakage (<1.0 μA at 18.8 V) and tighter V_BR tolerance. In contrast, P6SMB22CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485), with symmetrical clamping in both directions but higher leakage. The P6SMB22AHE3_B/H cannot replace P6SMB22CA in AC-coupled applications due to polarity dependence.

What is the thermal resistance of the P6SMB22AHE3_B/H, and how does it affect PCB layout?

The P6SMB22AHE3_B/H has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W and junction-to-lead (R_θJL) of 20 °C/W. To maintain T_J ≤ 150 °C under 5.0 W steady-state dissipation, PCB copper pads must follow the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) layout per terminal. Deviating from this reduces thermal margin and may cause premature failure - especially critical for the P6SMB22AHE3_B/H in high-ambient-temperature automotive environments.