Vishay General Semiconductor - Diodes Division P6SMB110AHE3_B/H

Overview

P6SMB110AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 110 V breakdown voltage (V_BR = 105–116 V at I_T = 1.0 mA), 152 V maximum clamping voltage (V_C) at 3.9 A peak pulse current (I_PPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power rails.

For engineers reviewing the P6SMB110AHE3_B/H datasheet, P6SMB110AHE3_B/H pinout, P6SMB110AHE3_B/H application, or P6SMB110AHE3_B/H equivalent, this AEC-Q101 qualified TVS offers validated surge robustness, low clamping ratio (V_C/V_BR ≈ 1.38), and MSL Level 1 reflow compatibility - critical for high-reliability 12–48 V DC systems with repetitive transient exposure.

Technical Context

This device operates as a unidirectional avalanche clamp: reverse-biased during normal operation (V_WM = 94.0 V), it transitions to low-impedance conduction when transient voltage exceeds V_BR, limiting downstream voltage to ≤152 V. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at V_WM).

Thermal design relies on R_θJA = 100 °C/W (typ.) and R_θJL = 20 °C/W (typ.), requiring minimum 0.2" × 0.2" copper pads per terminal for full 600 W pulse handling. The cathode band identifies polarity, and the matte tin-plated leads meet J-STD-002 solderability standards.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ110A-E3/52 and 1.5SMC110A, P6SMB110AHE3_B/H delivers optimal balance of AEC-Q101 qualification, 600 W capability, and compact SMB footprint - making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability and full-standard surge immunity.

Availability

P6SMB110AHE3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with guaranteed long-term continuity.

Supply support for P6SMB110AHE3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.

The P6SMB Series targets cost-sensitive yet reliability-critical transient protection needs, with AEC-Q101 variants like P6SMB110AHE3_B/H engineered specifically for 12–48 V automotive power distribution and industrial control subsystems.

FAQ

What is the clamping voltage of P6SMB110AHE3_B/H at its rated peak pulse current?

The P6SMB110AHE3_B/H has a maximum clamping voltage (V_C) of 152 V at its rated peak pulse current (I_PPM) of 3.9 A, measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and confirms the device's ability to limit transient overvoltage to a safe level for downstream 150 V-rated components. The P6SMB110AHE3_B/H datasheet specifies this parameter in Table 1 under "ELECTRICAL CHARACTERISTICS".

Is P6SMB110AHE3_B/H suitable for automotive applications?

Yes, P6SMB110AHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" and "_B" suffixes, indicating compliance with stress tests including temperature cycling, high-temperature reverse bias, and ESD. It is commonly deployed in engine control units, body control modules, and infotainment power supplies where ISO 7637-2 and ISO 16750-2 transient immunity is required. The P6SMB110AHE3_B/H meets these standards without derating under defined PCB layout conditions.

What does the "_B/H" suffix in P6SMB110AHE3_B/H indicate?

The "_B" denotes AEC-Q101 qualification for the P6SMB110AHE3_B/H series, while "/H" specifies packaging in 7" diameter plastic tape and reel with 750 units per reel. This ordering code aligns with Vishay's standardized nomenclature for automotive-grade, surface-mount TVS diodes. The "HE3" base suffix confirms RoHS-compliant construction and AEC-Q101 qualification, distinguishing P6SMB110AHE3_B/H from commercial-grade variants like P6SMB110A-E3/52.

How does P6SMB110AHE3_B/H compare to bidirectional TVS diodes?

P6SMB110AHE3_B/H is unidirectional and intended for DC line protection where polarity is fixed - such as 12 V battery rails or 48 V telecom inputs - offering lower leakage (<1.0 µA) and tighter V_BR tolerance than equivalent bidirectional parts. Bidirectional versions (e.g., P6SMB110CA) are used for AC or floating-signal applications like RS-485 or USB D+/D− lines. The P6SMB110AHE3_B/H cathode band must be oriented toward the protected line, unlike bidirectional devices which lack polarity marking.

What is the thermal resistance of P6SMB110AHE3_B/H, and how does it affect layout?

P6SMB110AHE3_B/H has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W and junction-to-lead resistance (R_θJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads per terminal. To sustain full 600 W pulse capability, PCB layout must follow Vishay's recommended pad dimensions (minimum 5.0 mm × 5.0 mm per pad) and avoid thermal isolation. Reduced copper area increases junction temperature, risking parametric shift or failure - a key design constraint for the P6SMB110AHE3_B/H in high-power transient scenarios.