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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SMBG90A-E3/52

Name: SMBG90A-E3/52
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG90A-E3/52
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG90A-E3/52

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG90A-E3/52.pdf

Description:: TVS DIODE 90VWM 146VC DO215AA

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Product details

Overview

SMBG90A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 90 V stand-off voltage (V_WM), 100 V minimum breakdown voltage (V_BR), 146 V maximum clamping voltage (V_C) at 4.1 A peak pulse current, and 600 W peak pulse power dissipation with a 10/1000 μs waveform - deployed in automotive engine control units to safeguard microcontrollers against load-dump transients.

For engineers reviewing the SMBG90A-E3/52 datasheet, SMBG90A-E3/52 pinout, SMBG90A-E3/52 application, or SMBG90A-E3/52 equivalent, key selection criteria include its AEC-Q101 qualification, DO-215AA (SMBG) surface-mount package, low 1.0 μA reverse leakage at V_WM, and verified clamping performance under repetitive surge conditions per IEC 61000-4-5.

Technical Context

This TVS diode operates as a unidirectional shunt protector, leveraging an avalanche breakdown mechanism to clamp transient voltages above its V_BR threshold while maintaining low dynamic impedance. Its glass-passivated junction ensures stable leakage and long-term reliability under thermal cycling.

Designed for high-energy surge suppression, it delivers 600 W peak pulse power with 10/1000 μs waveform compliance, supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across –55 °C to +150 °C junction temperature range - meeting automotive-grade thermal and mechanical stress requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail.
V_BR (min)	100 V at 1 mA - Guaranteed avalanche initiation voltage; ensures predictable turn-on during transients.
V_C (max)	146 V at 4.1 A - Maximum clamped voltage seen by protected circuit; determines downstream component voltage stress.
P_PPM	600 W - Peak transient energy absorption capability with 10/1000 μs waveform; qualifies for ISO 7637-2 Pulse 5a/b.
I_FSM	100 A - Non-repetitive forward surge rating (8.3 ms); supports protection against alternator load dump events.
T_J max	+150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating.
Leakage (I_D)	1.0 μA at 90 V - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss.

Pinout & Package

Package: SMBG (DO-215AA) - surface-mount, low-profile case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound, and cathode band marking for polarity identification.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to ground or lower-potential node in unidirectional configuration; enables clamping to reference plane.
Cathode	Current exit point during forward conduction; marked with band	Connected to protected line (e.g., 12 V rail); defines directionality and ensures correct orientation on PCB.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS subsystems.
Glass passivated junction	Ensures stable electrical parameters and long-term reliability under humidity and thermal cycling stress.
600 W peak pulse power	Meets IEC 61000-4-5 Level 4 (4 kV) and ISO 7637-2 Pulse 5a (100 V/350 mΩ) test requirements.
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients (<1 ns response time), improving protection margin.
MSL Level 1 rating	Enables standard SMT reflow without moisture sensitivity concerns; no bake required prior to assembly.

Applications

Automotive Power Rail Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients up to 120 V during alternator regulation failure. IC Role / Device Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges before reaching MCU power pins. Use Value: Limits clamped voltage to ≤146 V, preventing damage to 16 V-rated input regulators and ensuring ASIL-B functional safety compliance.	Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to EFT and surge noise. IC Role / Device Role: Bidirectional-capable but used unidirectionally on supply-side of signal conditioning stage to absorb coupled transients. Use Value: 1.0 μA leakage avoids DC offset errors in precision 24-bit ADC front-ends; 146 V clamping prevents latch-up in op-amp inputs.
Telecom Line Card Surge Suppression	Consumer Power Adapter Input Stage
Use Scenario: Secondary-side DC bus protection in telecom base station power supplies subjected to lightning-induced surges. IC Role / Device Role: Primary overvoltage clamp on +48 V distribution rail feeding FPGA and PMIC subsystems. Use Value: 600 W rating handles repeated 10/1000 μs surges per IEC 61000-4-5; AEC-Q101 qualification adds confidence in field longevity.	Use Scenario: Input-stage transient suppression in USB-C PD adapters where 90 V V_WM aligns with 100 V DC link after bridge rectification. IC Role / Device Role: Standoff-rated TVS placed across bulk capacitor to prevent overvoltage failure during AC line switching events. Use Value: 146 V clamping ensures <10 V margin below 150 V rated electrolytic capacitor WVDC, extending lifetime and reducing field returns.

Automotive Power Rail Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients up to 120 V during alternator regulation failure.

IC Role / Device Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges before reaching MCU power pins.

Use Value: Limits clamped voltage to ≤146 V, preventing damage to 16 V-rated input regulators and ensuring ASIL-B functional safety compliance.

Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to EFT and surge noise.

IC Role / Device Role: Bidirectional-capable but used unidirectionally on supply-side of signal conditioning stage to absorb coupled transients.

Use Value: 1.0 μA leakage avoids DC offset errors in precision 24-bit ADC front-ends; 146 V clamping prevents latch-up in op-amp inputs.

Telecom Line Card Surge Suppression

Consumer Power Adapter Input Stage

Use Scenario: Secondary-side DC bus protection in telecom base station power supplies subjected to lightning-induced surges.

IC Role / Device Role: Primary overvoltage clamp on +48 V distribution rail feeding FPGA and PMIC subsystems.

Use Value: 600 W rating handles repeated 10/1000 μs surges per IEC 61000-4-5; AEC-Q101 qualification adds confidence in field longevity.

Use Scenario: Input-stage transient suppression in USB-C PD adapters where 90 V V_WM aligns with 100 V DC link after bridge rectification.

IC Role / Device Role: Standoff-rated TVS placed across bulk capacitor to prevent overvoltage failure during AC line switching events.

Use Value: 146 V clamping ensures <10 V margin below 150 V rated electrolytic capacitor WVDC, extending lifetime and reducing field returns.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ90A-E3/52	Same V_WM/V_BR/V_C, but lower P_PPM = 600 W (same rating), different package: SMB (DO-214AA), larger R_θJA = 110 °C/W vs. 100 °C/W.	Less suitable for high-density automotive PCBs due to larger footprint and reduced thermal efficiency.	Select SMBG90A-E3/52 when board space and thermal performance are constrained; SMBJ90A-E3/52 only if legacy layout reuse is required.
SMCJ90A-E3/52	Same electrical specs, but SMC (DO-214AB) package: higher P_PPM = 1500 W, larger size, R_θJA = 15 °C/W, 2× footprint area.	Over-specified for 600 W needs; introduces unnecessary cost and layout overhead in compact designs.	Choose SMBG90A-E3/52 for optimal balance of surge rating, size, and thermal performance in space-constrained automotive modules.

Compared with SMBJ90A-E3/52 and SMCJ90A-E3/52, SMBG90A-E3/52 delivers identical 600 W clamping performance in the smallest possible footprint (DO-215AA), with superior thermal resistance (100 °C/W) and AEC-Q101 validation - making it the preferred choice for next-generation automotive and industrial edge nodes where density and reliability are co-prioritized.

Availability

SMBG90A-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for SMBG90A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, ruggedness, and automotive qualification.

The SMBG series is engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, low leakage, and precise clamping are mandatory.

FAQ

What is the clamping voltage of SMBG90A-E3/52 at its rated peak pulse current?

The SMBG90A-E3/52 has a maximum clamping voltage (V_C) of 146 V at 4.1 A peak pulse current (I_PPM) with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88456, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during surge events. The SMBG90A-E3/52 achieves this performance while maintaining low dynamic impedance and minimal overshoot.

Is SMBG90A-E3/52 qualified for automotive applications?

Yes, SMBG90A-E3/52 is AEC-Q101 qualified, as confirmed in the Vishay datasheet (page 2, "Mechanical Data" section). This qualification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and surge stress conditions. The SMBG90A-E3/52 is explicitly recommended for engine control units, body control modules, and ADAS power domains - making it suitable for ASIL-B–level systems when integrated per manufacturer guidelines.

What package type does SMBG90A-E3/52 use, and what are its key mounting characteristics?

SMBG90A-E3/52 uses the SMBG (DO-215AA) surface-mount package: low-profile, gull-wing leaded case with 0.235" × 0.130" footprint, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and MSL Level 1 rating (260 °C peak reflow). Its thermal resistance is R_θJA = 100 °C/W when mounted on 0.2" × 0.2" copper pads - critical for thermal management in high-power automotive PCB layouts.

How does SMBG90A-E3/52 differ from SMBJ90A-E3/52 in practical design terms?

SMBG90A-E3/52 and SMBJ90A-E3/52 share identical electrical ratings (V_WM = 90 V, V_C = 146 V, P_PPM = 600 W) but differ in package: SMBG uses DO-215AA (smaller footprint, R_θJA = 100 °C/W), while SMBJ uses DO-214AA (larger, R_θJA = 110 °C/W). The SMBG90A-E3/52 enables denser layouts and better thermal performance - especially valuable in automotive ECUs where space and junction temperature margins are tightly constrained.

What is the maximum reverse leakage current for SMBG90A-E3/52 at its stand-off voltage?

The SMBG90A-E3/52 exhibits a maximum reverse leakage current (I_D) of 1.0 μA at its rated stand-off voltage of 90 V (V_WM), measured at T_A = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power loss in always-on automotive modules - a key advantage over higher-leakage alternatives like older SMA-based TVS devices.

SMBG90A-E3/52 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-215AA, SMB Gull Wing

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 90V

Voltage - Breakdown (Min):: 100V

Voltage - Clamping (Max) @ Ipp:: 146V

Current - Peak Pulse (10/1000µs):: 4.1A

Power - Peak Pulse:: 600W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMBG)

SMBG90A-E3/52 FAQ

1.How can I place an order for SMBG90A-E3/52 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG90A-E3/52 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SMBG90A-E3/52 reliable?

The price and inventory of SMBG90A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG90A-E3/52 is usually 5 days.

3.What payment methods are accepted for SMBG90A-E3/52?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG90A-E3/52 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG90A-E3/52?

SMBG90A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG90A-E3/52 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SMBG90A-E3/52?

For technical support, including SMBG90A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG90A-E3/52 requirements.

6.How does Aetrix verify that SMBG90A-E3/52 is sourced from the original manufacturer or authorized distributors?

All SMBG90A-E3/52 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBG90A-E3/52 meets industry standards.

7.What is the process for return or replacement of SMBG90A-E3/52?

All SMBG90A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG90A-E3/52, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SMBG90A-E3/52 part is unused and in its original packaging.

Return procedure for SMBG90A-E3/52:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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