Vishay General Semiconductor - Diodes Division P6SMB47AHM3_A/I

Overview

P6SMB47AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 47 V breakdown voltage (V_BR = 44.7–49.4 V at 1 mA), 600 W peak pulse power (10/1000 µs), and clamping voltage of 64.8 V at 9.3 A peak pulse current - deployed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.

For engineers reviewing the P6SMB47AHM3_A/I datasheet, P6SMB47AHM3_A/I pinout, P6SMB47AHM3_A/I application, or P6SMB47AHM3_A/I equivalent, key selection criteria include unidirectional polarity, 40.2 V stand-off voltage (V_WM), <1 µA reverse leakage at V_WM, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and MSL Level 1 reflow capability up to 260 °C.

Technical Context

This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable V_BR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.

Designed for automated SMT placement on standard PCB pads (0.2" × 0.2"), it delivers 600 W peak pulse power under repetitive 0.01% duty cycle conditions and maintains thermal stability via R_θJA = 100 °C/W and R_θJL = 20 °C/W - critical for sustained surge immunity in compact power rails and interface lines.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with P6SMB47AHM3_A/I, SMAJ47A-E3/52 offers smaller size but reduced surge capacity, while 1.5SMC47A provides higher power handling and thermal robustness at the cost of larger PCB area - making P6SMB47AHM3_A/I the optimal balance of AEC-Q101 compliance, 600 W capability, and SMB footprint for space-constrained automotive and industrial designs.

Availability

P6SMB47AHM3_A/I is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, telecom line cards, and consumer power adapter designs requiring stable component supply with guaranteed AEC-Q101 qualification and halogen-free compliance.

Supply support for P6SMB47AHM3_A/I 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 and automotive-grade validation.

The P6SMB Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, stable clamping, and SMT manufacturability are mandatory.

FAQ

What is the breakdown voltage tolerance for P6SMB47AHM3_A/I?

The P6SMB47AHM3_A/I has a breakdown voltage (V_BR) range of 44.7 V to 49.4 V at 1 mA test current, corresponding to a ±5% tolerance around the nominal 47 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable overvoltage protection design in safety-critical systems such as automotive ECUs where predictable trip thresholds are essential.

Is P6SMB47AHM3_A/I suitable for automotive applications?

Yes, P6SMB47AHM3_A/I is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and surge endurance required for automotive under-hood and body electronics. Its 150 °C maximum junction temperature, MSL Level 1 reflow rating, and halogen-free construction make it appropriate for engine control modules, ADAS sensors, and infotainment power rails.

What is the clamping voltage of P6SMB47AHM3_A/I at its rated peak pulse current?

The P6SMB47AHM3_A/I clamps to a maximum voltage of 64.8 V when subjected to its rated peak pulse current of 9.3 A (10/1000 µs waveform). This clamping voltage - measured at the specified I_PPM - defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream components like microcontrollers and transceivers remain within safe operating limits.

How does the HM3 suffix affect the specifications of P6SMB47AHM3_A/I?

The HM3 suffix on P6SMB47AHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade variants (e.g., E3 or M3). It guarantees compliance with automotive material restrictions, passes JESD22-A110 thermal shock and JESD22-A108 HTRB testing, and supports lead-free reflow up to 260 °C (MSL Level 1), without altering electrical parameters such as V_BR, V_C, or P_PPM.

What is the maximum reverse leakage current for P6SMB47AHM3_A/I at its stand-off voltage?

At its maximum working voltage (V_WM) of 40.2 V, the P6SMB47AHM3_A/I exhibits a maximum reverse leakage current (I_D) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on automotive subsystems, supporting designs where quiescent current budgets are tightly constrained.