Vishay General Semiconductor - Diodes Division P6SMB30CAHE3_B/H

Overview

P6SMB30CAHE3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), and 41.4 V maximum clamping voltage (VC) at 14.5 A peak pulse current (IPPM), designed to protect signal lines and power rails in automotive and industrial electronics against ESD and inductive switching transients.

For engineers reviewing the P6SMB30CAHE3_B/H datasheet, P6SMB30CAHE3_B/H pinout, P6SMB30CAHE3_B/H application, or P6SMB30CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 600 W peak pulse power rating with 10/1000 μs waveform, low thermal resistance (RθJL = 20 °C/W), and RoHS-compliant matte tin-plated terminals solderable per J-STD-002.

Technical Context

This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions - critical for protecting AC-coupled or differential signal paths. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.

The device uses a low-inductance SMB package optimized for high-speed transient suppression, with thermal design validated on 0.2" × 0.2" copper pads. Its 150 °C maximum junction temperature and 100 °C/W junction-to-ambient thermal resistance (RθJA) define safe continuous power dissipation limits under real-world PCB layout constraints.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ30CA and 1.5KE30CA, P6SMB30CAHE3_B/H uniquely combines AEC-Q101 qualification, 600 W SMT-rated surge capacity, and SMB footprint - making it the only option qualified for automotive-grade production while maintaining compatibility with high-volume pick-and-place manufacturing.

Availability

P6SMB30CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer power adapter outputs, and telecom DC power rails requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for P6SMB30CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, robust surge handling, and seamless integration into automated SMT processes.

FAQ

What does the "CA" suffix indicate in P6SMB30CAHE3_B/H?

The "CA" suffix denotes a bidirectional configuration - meaning the P6SMB30CAHE3_B/H provides symmetrical clamping in both forward and reverse directions, unlike unidirectional "A" variants. This enables protection of AC-coupled signals, differential buses like CAN or RS-485, and circuits where polarity cannot be guaranteed during transient events. The device has no cathode band marking, confirming its bidirectional nature.

Is P6SMB30CAHE3_B/H suitable for automotive applications?

Yes, P6SMB30CAHE3_B/H is AEC-Q101 qualified (as indicated by the "HE3" and "_B" suffixes), having passed rigorous stress tests including temperature cycling, high-temperature operating life, and mechanical shock. It is approved for use in automotive subsystems such as body control modules, infotainment interfaces, and sensor signal conditioning where immunity to load dump, jump start, and ESD per ISO 10605 is required.

What is the maximum clamping voltage of P6SMB30CAHE3_B/H under surge conditions?

The maximum clamping voltage (VC) of P6SMB30CAHE3_B/H is 41.4 V when subjected to its rated peak pulse current (IPPM) of 14.5 A using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 3.3 V, 5 V, or 24 V logic and interface ICs.

How does the SMB package of P6SMB30CAHE3_B/H compare to SMA or SMC in terms of thermal performance?

The SMB (DO-214AA) package of P6SMB30CAHE3_B/H offers a balanced trade-off: lower thermal resistance than SMA (RθJL = 20 °C/W vs. ~25 °C/W), yet smaller footprint than SMC. Its 100 °C/W RθJA is measured on 0.2" × 0.2" copper pads - making it more thermally efficient than SMA under identical layout conditions. This allows higher sustained power handling in compact industrial and automotive PCBs where space and thermal mass are constrained.

Does P6SMB30CAHE3_B/H require orientation during PCB placement?

No, P6SMB30CAHE3_B/H does not require specific orientation during placement because it is a bidirectional TVS diode - its Anode and Cathode terminals are functionally identical and interchangeable. Unlike unidirectional variants (e.g., P6SMB30A), the P6SMB30CAHE3_B/H has no cathode band marking, eliminating risk of misplacement and simplifying automated assembly. This symmetry also ensures consistent clamping behavior regardless of signal polarity.