Vishay General Semiconductor - Diodes Division P6SMB9.1CAHE3_B/H

Overview

P6SMB9.1CAHE3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 9.1 V breakdown voltage (V_BR = 8.65–9.55 V at I_T = 1.0 mA), 13.4 V maximum clamping voltage (V_C) at 44.8 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 control systems.

For engineers reviewing the P6SMB9.1CAHE3_B/H datasheet, P6SMB9.1CAHE3_B/H pinout, P6SMB9.1CAHE3_B/H application, or P6SMB9.1CAHE3_B/H equivalent, key selection considerations include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements in harsh EMI environments.

Technical Context

This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable leakage (<50 μA at V_WM = 7.78 V) and fast response time (<1.0 ns), enabling protection of high-speed analog and digital signal paths without signal distortion.

The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (R_θJA = 100 °C/W) supports operation on standard 0.2" × 0.2" copper pads without heatsinking in typical PCB layouts.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; dimensions 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); UL 94 V-0 flammability rating; 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 SMAJ9.0A and SMCJ9.0CA, P6SMB9.1CAHE3_B/H offers optimal balance of bidirectional functionality, AEC-Q101 qualification, and compact SMB footprint - making it preferred for space-constrained automotive and industrial designs requiring polarity-agnostic transient immunity.

Availability

P6SMB9.1CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, consumer appliance motor drives, and telecom line interface protection requiring stable component supply across extended production lifecycles.

Supply support for P6SMB9.1CAHE3_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 automotive-grade qualification.

The P6SMB series was developed specifically for robust, surface-mount transient suppression in automotive, industrial, and communications equipment - prioritizing low clamping voltage, repeatable surge handling, and AEC-Q101 compliance from wafer to final test.

FAQ

What does the "CA" suffix indicate in P6SMB9.1CAHE3_B/H?

The "CA" suffix denotes a bidirectional configuration: P6SMB9.1CAHE3_B/H provides symmetrical clamping for both positive and negative transients, unlike unidirectional variants (e.g., P6SMB9.1A). This eliminates polarity dependency during layout and enables use on AC-coupled or floating signal lines without external diode pairing - a key requirement in automotive CAN/LIN and industrial analog sensor interfaces where signal polarity may vary.

Is P6SMB9.1CAHE3_B/H suitable for IEC 61000-4-5 surge testing?

Yes, P6SMB9.1CAHE3_B/H is rated for 600 W peak pulse power with a 10/1000 μs waveform, which aligns with Level 3 (2 kV line-to-ground) and Level 4 (4 kV line-to-ground) requirements of IEC 61000-4-5 when mounted per the recommended 0.2" × 0.2" copper pad layout. Its 13.4 V clamping voltage ensures protected circuits remain within safe operating limits during standardized surge events, provided upstream impedance limits peak current to ≤44.8 A.

How does the "HE3_B/H" suffix affect P6SMB9.1CAHE3_B/H's qualification and packaging?

The "HE3_B/H" suffix indicates RoHS-compliant construction with AEC-Q101 qualification ("HE3"), revision "B", and 7" tape-and-reel packaging ("H"). This distinguishes it from commercial-grade E3 variants and confirms suitability for automotive applications requiring extended temperature operation (−65 °C to +150 °C), humidity resistance, and long-term reliability validation - critical for engine control units and ADAS modules where field failure is unacceptable.

What is the maximum reverse leakage current for P6SMB9.1CAHE3_B/H at its stand-off voltage?

At V_WM = 7.78 V and T_A = 25 °C, the maximum reverse leakage current (I_D) for P6SMB9.1CAHE3_B/H is 50 μA. This low leakage ensures minimal power loss and signal interference in always-on monitoring circuits such as battery-backed sensor nodes or 24 V industrial I/O lines, supporting stable operation even under elevated ambient temperatures up to 125 °C (derated per datasheet Fig. 2).

Can P6SMB9.1CAHE3_B/H replace P6SMB9.0CA in an existing design?

Yes, P6SMB9.1CAHE3_B/H is a direct functional replacement for P6SMB9.0CA: both share identical SMB (DO-214AA) package, bidirectional configuration, and overlapping breakdown range (P6SMB9.0CA: 8.55–9.45 V vs. P6SMB9.1CAHE3_B/H: 8.65–9.55 V). The minor V_BR shift has negligible impact on clamping performance, and the AEC-Q101 qualification of P6SMB9.1CAHE3_B/H adds reliability assurance without requiring PCB or schematic changes.