Vishay General Semiconductor - Diodes Division SMB10J17-E3/52

Overview

SMB10J17-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on power and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), 1000 W peak pulse power (10/1000 µs), 36.2 A peak pulse current (IPPM), and clamps to ≤27.6 V at rated surge - deployed in automotive power supplies, industrial motor controllers, and DC input protection circuits.

For engineers reviewing the SMB10J17-E3/52 datasheet, SMB10J17-E3/52 pinout, SMB10J17-E3/52 application, or SMB10J17-E3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.

Technical Context

This TVS diode operates as a clamping device in parallel with protected circuitry, activating when reverse voltage exceeds its breakdown threshold (VBR = 18.9–20.9 V at 1 mA). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced transients, and inductive switching spikes per IEC 61000-4-2/4-5.

Thermal performance is defined by R_θJA = 72 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm pads) and R_θJL = 20 °C/W (junction-to-lead), supporting sustained operation up to T_J = 150 °C. The glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and long-term reliability under repetitive surge stress.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by color band on body end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ17A-E3/52, SMB10J17-E3/52 offers identical protection performance in a slightly optimized SMB footprint; versus 1.5SMC17A, it delivers equivalent clamping with 30 % smaller board area and faster assembly throughput.

Availability

SMB10J17-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom power interface designs requiring stable component supply, AEC-Q101 compliance, and RoHS-conforming manufacturing.

Supply support for SMB10J17-E3/52 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 SMB10Jxx series belongs to Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in automotive, industrial, and communications infrastructure where compact size and AEC-Q101 validation are mandatory.

FAQ

What is the polarity configuration of SMB10J17-E3/52?

SMB10J17-E3/52 is a unidirectional TVS diode, meaning it functions as a reverse-biased zener-like clamp during overvoltage events and conducts forward current only during fault conditions. The cathode is marked by a color band on the package body, and it must be oriented toward the protected line (e.g., +24 V rail) with anode tied to ground or lower potential. This configuration ensures proper clamping behavior and avoids unintended conduction during normal operation.

Does SMB10J17-E3/52 meet automotive qualification standards?

Yes, SMB10J17-E3/52 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and surge endurance specifically for automotive applications. Its qualification covers operation from −55 °C to +150 °C junction temperature and validates reliability for under-hood and chassis-mounted systems such as body control modules and power distribution units.

What is the maximum clamping voltage of SMB10J17-E3/52 under rated surge conditions?

The maximum clamping voltage (VC) of SMB10J17-E3/52 is 27.6 V when subjected to its rated peak pulse current (IPPM) of 36.2 A, measured using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 27.6 V during worst-case transient events, enabling robust design margin for 33 V-rated ICs.

Can SMB10J17-E3/52 be used in bidirectional protection applications?

No, SMB10J17-E3/52 is strictly unidirectional and cannot provide symmetrical clamping for AC or bipolar transients. For bidirectional protection, Vishay offers the SMB8J17CA variant (same VWM and clamping but dual-junction architecture). Using SMB10J17-E3/52 in bidirectional configurations risks failure during positive half-cycle surges due to lack of forward conduction capability on the opposing polarity.

What PCB pad layout is recommended for optimal thermal and surge performance of SMB10J17-E3/52?

Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMB10J17-E3/52 to achieve rated 1000 W pulse power and maintain R_θJA = 72 °C/W. Thermal vias under pads and internal ground/power planes further improve heat dissipation. Deviating from this layout reduces surge current handling and may cause premature thermal runaway during repetitive transients.