Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Vishay General Semiconductor - Diodes Division SMBG85A-E3/52

Name: SMBG85A-E3/52
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG85A-E3/52
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SMBG85A-E3/52

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG85A-E3/52.pdf

Description:: TVS DIODE 85VWM 137VC DO215AA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,687

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SMBG85A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 85 V stand-off voltage (V_WM), 94.4–104 V breakdown voltage (V_BR) at 1 mA, 137 V maximum clamping voltage (V_C) at 4.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power electronics and industrial sensor interfaces.

For engineers reviewing the SMBG85A-E3/52 datasheet, SMBG85A-E3/52 pinout, SMBG85A-E3/52 application, or SMBG85A-E3/52 equivalent, key selection criteria include its AEC-Q101 qualification, DO-215AA (SMBG) package compatibility with automated SMT assembly, low incremental surge resistance, and verified clamping performance under repetitive transients in 12 V/24 V vehicle subsystems.

Technical Context

This unidirectional TVS diode operates as a shunt-clamping device, conducting above its breakdown threshold to limit transient voltages across protected circuit nodes. Its glass-passivated junction ensures stable leakage (<1.0 µA at 85 V) and fast response time (<1 ns), while thermal resistance (R_θJA = 100 °C/W) supports operation up to 150 °C junction temperature.

The SMBG85A-E3/52 is rated for 100 A non-repetitive forward surge current (I_FSM, 8.3 ms half-sine) and meets J-STD-020 MSL Level 1 - enabling reflow soldering at 260 °C peak without preconditioning. Its cathode-band polarity marking aligns with standard SMBG layout conventions for unidirectional devices.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	85 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range on protected line
V_BR (min/max)	94.4 V / 104 V at 1 mA - precise breakdown window ensures reliable turn-on margin above V_WM with minimal overshoot
V_C @ I_PPM	137 V at 4.4 A - clamping voltage during 600 W transient limits stress on downstream MOSFETs or ICs
P_PPM	600 W - peak pulse power handling per 10/1000 µs waveform; validated for ISO 7637-2 Pulse 1/2a/5a compliance
I_FSM	100 A - surge current rating enables protection against load-dump events in automotive 24 V systems
T_J max	+150 °C - extended junction temperature range supports under-hood and industrial control cabinet deployment
MSL Level	Level 1 (J-STD-020) - allows single-reflow assembly without dry-pack or baking requirements

Pinout & Package

Package: SMBG (DO-215AA), surface-mount gull-wing leaded case with matte tin-plated terminals; 0.255" × 0.155" footprint (6.48 mm × 3.94 mm), 0.030" lead thickness, cathode band marking on anode-side end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during clamping	Connected to protected line (e.g., battery rail); conducts when transient exceeds V_BR
Cathode	Current exit terminal during clamping	Connected to ground or low-impedance return path; polarity band identifies this terminal

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan
Glass passivated junction	Ensures stable V_BR tolerance and low leakage drift over lifetime and temperature extremes
600 W peak pulse power	Provides margin against high-energy transients such as ISO 16750-2 Load Dump (up to 35 V × 17 A)
Low profile SMBG package	0.058" height enables use in space-constrained modules like ADAS ECUs and motor controllers
RoHS-compliant E3 suffix	Meets industrial-grade environmental compliance with matte tin plating and JESD201 Class 2 whisker resistance

Applications

Automotive Power Rail Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 24 V supply inputs of body control modules (BCMs) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between battery rail and input filter capacitor. Use Value: Limits voltage to ≤137 V during 600 W surges, preventing damage to upstream DC/DC converters and microcontrollers.	Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in PLC I/O modules from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used across signal and return paths with common-ground reference. Use Value: Clamps fast transients (<1 ns response) while maintaining <1.0 µA leakage at 85 V, preserving signal integrity and accuracy.
Telecom Power Supply Input	Motor Drive Gate Driver Protection
Use Scenario: Front-end protection of AC/DC rectified outputs in telecom base station power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS mounted directly at bulk capacitor input to absorb energy before filtering stages. Use Value: Withstands 100 A surge (8.3 ms) and dissipates 600 W pulses, reducing need for secondary crowbar circuits.	Use Scenario: Overvoltage suppression on high-side gate drive lines of 3-phase inverters in HVAC compressors and EV traction systems. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to driver IC ground, protecting level-shifters and bootstrap FETs. Use Value: 137 V clamping prevents gate oxide rupture in 100 V-rated SiC MOSFET drivers during dV/dt coupling events.

Automotive Power Rail Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 24 V supply inputs of body control modules (BCMs) against load dump and jump-start transients.

IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between battery rail and input filter capacitor.

Use Value: Limits voltage to ≤137 V during 600 W surges, preventing damage to upstream DC/DC converters and microcontrollers.

Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in PLC I/O modules from ESD and inductive switching noise.

IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used across signal and return paths with common-ground reference.

Use Value: Clamps fast transients (<1 ns response) while maintaining <1.0 µA leakage at 85 V, preserving signal integrity and accuracy.

Telecom Power Supply Input

Motor Drive Gate Driver Protection

Use Scenario: Front-end protection of AC/DC rectified outputs in telecom base station power supplies exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Primary-level TVS mounted directly at bulk capacitor input to absorb energy before filtering stages.

Use Value: Withstands 100 A surge (8.3 ms) and dissipates 600 W pulses, reducing need for secondary crowbar circuits.

Use Scenario: Overvoltage suppression on high-side gate drive lines of 3-phase inverters in HVAC compressors and EV traction systems.

IC Role / Device Role / Timing Role: Unidirectional clamp referenced to driver IC ground, protecting level-shifters and bootstrap FETs.

Use Value: 137 V clamping prevents gate oxide rupture in 100 V-rated SiC MOSFET drivers during dV/dt coupling events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ85A-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	Less suitable for high-density layouts due to larger 0.295" × 0.230" footprint and higher thermal resistance	Select SMBG85A-E3/52 for space-constrained automotive modules requiring MSL Level 1 and tighter thermal management.
SMCJ85A-E3/52	Same electrical specs, but SMC (DO-214AB) package: 0.325" × 0.265", higher P_PPM = 1500 W, R_θJA = 130 °C/W	Better for high-energy surge environments (e.g., railway power), but incompatible with fine-pitch SMBG footprints	Choose SMBG85A-E3/52 when board area is limited and 600 W rating suffices - avoids redesign for larger pad layout.

Compared with SMBJ85A-E3/52 and SMCJ85A-E3/52, the SMBG85A-E3/52 delivers identical clamping performance in a smaller, thermally optimized package with superior manufacturability for high-volume automotive SMT lines - making it optimal where footprint, MSL compliance, and thermal efficiency are jointly constrained.

Availability

SMBG85A-E3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, AEC-Q101 validation, and RoHS-compliant manufacturing.

Supply support for SMBG85A-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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific validation.

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

FAQ

What is the maximum clamping voltage of SMBG85A-E3/52 and under what test condition?

The SMBG85A-E3/52 has a maximum clamping voltage (V_C) of 137 V, measured at a peak pulse current (I_PPM) of 4.4 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and reflects worst-case behavior during surge events, ensuring downstream components remain within safe voltage limits during transient suppression.

Is SMBG85A-E3/52 suitable for automotive applications, and what qualification does it hold?

Yes, SMBG85A-E3/52 is explicitly AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per the automotive semiconductor reliability standard. Its construction - glass-passivated junction, MSL Level 1 rating, and RoHS-compliant E3 finish - makes it approved for use in engine control units, body electronics, and ADAS modules per OEM requirements.

What is the reverse leakage current specification for SMBG85A-E3/52 at its rated stand-off voltage?

At its rated stand-off voltage (V_WM) of 85 V and ambient temperature of 25 °C, the SMBG85A-E3/52 exhibits a maximum reverse leakage current (I_D) of 1.0 µA. This low leakage preserves power efficiency in always-on systems and ensures minimal interference with high-impedance sensing circuits, such as those found in battery monitoring or precision analog front-ends.

How does the SMBG85A-E3/52 differ from bidirectional variants like SMBG85CA?

The SMBG85A-E3/52 is unidirectional and features a cathode band for polarity identification, while SMBG85CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The SMBG85A-E3/52 is intended for DC-biased lines (e.g., +24 V rails), whereas SMBG85CA suits AC-coupled or floating signal paths. Their V_BR and V_C values differ slightly due to internal structure - SMBG85A-E3/52 has V_BR = 94.4–104 V, while SMBG85CA's is 94.4–104 V in each direction.

What packaging and reel configuration is supplied for SMBG85A-E3/52?

SMBG85A-E3/52 is supplied in 7" diameter plastic tape and reel format with a base quantity of 750 units per reel (package code /52). The device uses gull-wing leads compatible with standard SMT pick-and-place equipment, and the E3 suffix confirms RoHS compliance, matte tin plating, and JESD201 Class 2 whisker resistance - meeting IPC-A-610 acceptance criteria for industrial and automotive assembly.

SMBG85A-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):: 85V

Voltage - Breakdown (Min):: 94.4V

Voltage - Clamping (Max) @ Ipp:: 137V

Current - Peak Pulse (10/1000µs):: 4.4A

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)

SMBG85A-E3/52 FAQ

1.How can I place an order for SMBG85A-E3/52 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG85A-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 SMBG85A-E3/52 reliable?

The price and inventory of SMBG85A-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 SMBG85A-E3/52 is usually 5 days.

3.What payment methods are accepted for SMBG85A-E3/52?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG85A-E3/52 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG85A-E3/52?

SMBG85A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG85A-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 SMBG85A-E3/52?

For technical support, including SMBG85A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG85A-E3/52 requirements.

6.How does Aetrix verify that SMBG85A-E3/52 is sourced from the original manufacturer or authorized distributors?

All SMBG85A-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 SMBG85A-E3/52 meets industry standards.

7.What is the process for return or replacement of SMBG85A-E3/52?

All SMBG85A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG85A-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 SMBG85A-E3/52 part is unused and in its original packaging.

Return procedure for SMBG85A-E3/52:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …