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

Vishay General Semiconductor - Diodes Division SMBG30A-E3/5B

Name: SMBG30A-E3/5B
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG30A-E3/5B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG30A-E3/5B

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG30A-E3/5B.pdf

Description:: TVS DIODE 30VWM 48.4VC DO215AA

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Product details

Overview

SMBG30A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, featuring 30 V stand-off voltage (V_WM), 33.3–36.8 V breakdown voltage (V_BR) at 1 mA, 48.4 V clamping voltage (V_C) at 12.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform-designed for robust overvoltage protection of automotive sensor signal lines.

For engineers reviewing the SMBG30A-E3/5B datasheet, SMBG30A-E3/5B pinout, SMBG30A-E3/5B application, or SMBG30A-E3/5B equivalent, this part delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and MSL Level 1 reflow compatibility-key selection criteria for automotive-grade transient suppression in space-constrained PCB layouts.

Technical Context

This unidirectional TVS diode operates as a voltage-clamping protector, conducting only when reverse voltage exceeds its breakdown threshold (33.3–36.8 V), thereby shunting transient energy to ground while maintaining <1.0 μA leakage at 30 V stand-off. Its glass-passivated junction ensures stable performance under thermal cycling and humidity stress.

The device uses a single PN junction structure with cathode-band polarity marking, optimized for automated placement on 0.2" × 0.2" copper pads per terminal. It meets UL 497B recognition (QVGQ2) and supports repetitive transients at ≤0.01% duty cycle without degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 24 V automotive systems.
V_BR (min/max)	33.3 V / 36.8 V at 1 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature.
V_C @ I_PPM	48.4 V at 12.4 A - Clamping voltage during 600 W transient limits downstream IC stress below 50 V absolute maximum ratings.
P_PPM	600 W - Peak pulse power handling capability with 10/1000 μs waveform enables protection against ISO 7637-2 Pulse 1 & 2a/b.
I_FSM	100 A - Non-repetitive forward surge rating supports high-energy load dump events in automotive power nets.
T_J max	+150 °C - Junction temperature limit allows operation in under-hood environments with minimal derating.
MSL Level	Level 1 (J-STD-020) - Enables standard 260 °C lead-free reflow without moisture-related failure risk.

Pinout & Package

Package: SMBG (DO-215AA), surface-mount gull-wing configuration with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on one end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse voltage reference node	Connected to protected line (e.g., sensor output); conducts during positive transients when used in reverse-biased configuration.
Cathode	Clamping node / Surge return path	Connected to ground or low-impedance return plane; sinks transient current during overvoltage events above V_BR.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements.
Glass passivated junction	Enhances long-term reliability under thermal cycling and humidity exposure, critical for 15+ year vehicle lifetimes.
600 W peak pulse power	Meets ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (battery disconnect) immunity requirements.
Low clamping ratio (V_C/V_BR ≈ 1.37)	Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to downstream 3.3 V/5 V logic.
MSL Level 1 rating	Eliminates pre-bake requirement prior to SMT assembly, streamlining high-volume automotive manufacturing.

Applications

Automotive Sensor Protection	Industrial PLC I/O Protection
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and ECU input, referenced to chassis ground. Use Value: Limits transient voltage to ≤48.4 V during 12.4 A surges, preserving integrity of 5 V ADC front-ends and preventing false readings or shutdown.	Use Scenario: Shielding 24 V digital input channels on programmable logic controllers from inductive kickback generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff protector on field-side input traces, absorbing repetitive 600 W pulses without degradation. Use Value: Maintains <1.0 μA leakage at 30 V nominal, ensuring clean logic thresholds and eliminating false triggering in noisy factory environments.
Automotive Body Control Module	Telecom Power Interface
Use Scenario: Safeguarding LIN bus transceivers and LED driver outputs in door modules subjected to ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized TVS on each protected line, positioned within 2 mm of connector entry point. Use Value: Responds in <1 ns to ESD transients, clamping to 48.4 V before transceiver internal protection activates, extending system-level robustness.	Use Scenario: Protecting DC power inputs of remote radio units powered via PoE-like 48 V distribution networks prone to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of DC/DC converter. Use Value: Handles 100 A non-repetitive forward surge (I_FSM), enabling survival of high-energy lightning-induced transients without fuse blowout.

Automotive Sensor Protection

Industrial PLC I/O Protection

Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load dump and alternator ripple.

IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and ECU input, referenced to chassis ground.

Use Value: Limits transient voltage to ≤48.4 V during 12.4 A surges, preserving integrity of 5 V ADC front-ends and preventing false readings or shutdown.

Use Scenario: Shielding 24 V digital input channels on programmable logic controllers from inductive kickback generated by solenoid valves and contactors.

IC Role / Device Role / Timing Role: Standoff protector on field-side input traces, absorbing repetitive 600 W pulses without degradation.

Use Value: Maintains <1.0 μA leakage at 30 V nominal, ensuring clean logic thresholds and eliminating false triggering in noisy factory environments.

Automotive Body Control Module

Telecom Power Interface

Use Scenario: Safeguarding LIN bus transceivers and LED driver outputs in door modules subjected to ESD and cable discharge events.

IC Role / Device Role / Timing Role: Localized TVS on each protected line, positioned within 2 mm of connector entry point.

Use Value: Responds in <1 ns to ESD transients, clamping to 48.4 V before transceiver internal protection activates, extending system-level robustness.

Use Scenario: Protecting DC power inputs of remote radio units powered via PoE-like 48 V distribution networks prone to lightning-induced surges.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of DC/DC converter.

Use Value: Handles 100 A non-repetitive forward surge (I_FSM), enabling survival of high-energy lightning-induced transients without fuse blowout.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ30A-E3/5B	Same V_WM (30 V), but lower P_PPM = 600 W and higher V_C = 48.4 V; identical SMB (DO-214AA) footprint but different thermal resistance (R_θJA = 110 °C/W vs. 100 °C/W).	Not AEC-Q101 qualified; rated for industrial grade only; lacks UL 497B recognition.	Select SMBJ30A-E3/5B only for cost-sensitive non-automotive designs where AEC-Q101 and UL certification are not required.
SMCJ30A-E3/5B	Same V_WM and V_C, but higher P_PPM = 1500 W and larger SMC (DO-214AB) package; R_θJA = 40 °C/W enables higher sustained surge handling.	Requires larger PCB area and higher mounting pad thermal mass; suitable for primary-level protection rather than point-of-load.	Choose SMCJ30A-E3/5B when protecting high-power subsystems like motor drivers or battery management inputs where 1500 W capability is mandated.

Compared with SMBJ30A-E3/5B and SMCJ30A-E3/5B, SMBG30A-E3/5B uniquely balances AEC-Q101 compliance, UL 497B recognition, and compact SMBG footprint-making it optimal for space-constrained, safety-critical automotive signal-line protection where certification and layout density are both decisive.

Availability

SMBG30A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power inputs requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SMBG30A-E3/5B 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, precision, and automotive-grade qualification.

The SMBG series was developed specifically for AEC-Q101-compliant transient suppression in compact automotive and industrial electronics, prioritizing low-profile packaging, high surge robustness, and consistent clamping performance across temperature.

FAQ

What is the clamping voltage of SMBG30A-E3/5B at its rated peak pulse current?

The SMBG30A-E3/5B has a maximum clamping voltage (V_C) of 48.4 V at its rated peak pulse current (I_PPM) of 12.4 A, measured using a 10/1000 μs waveform. This value is confirmed in the Vishay datasheet Document Number 88456, page 2, and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBG30A-E3/5B maintains this clamping performance across its specified operating temperature range.

Is SMBG30A-E3/5B suitable for automotive applications?

Yes, SMBG30A-E3/5B is AEC-Q101 qualified and UL 497B recognized (file E136766), making it suitable for automotive applications including engine control units, ADAS sensors, and body electronics. Its SMBG (DO-215AA) package supports MSL Level 1 reflow, and its 150 °C maximum junction temperature accommodates under-hood thermal environments. The SMBG30A-E3/5B meets key automotive transient standards including ISO 7637-2 Pulse 1 and Pulse 2a.

What is the standoff voltage and breakdown voltage range for SMBG30A-E3/5B?

The SMBG30A-E3/5B has a reverse stand-off voltage (V_WM) of 30 V and a breakdown voltage (V_BR) range of 33.3 V to 36.8 V at 1 mA test current. These values are specified in the Vishay datasheet (Document Number 88456, page 2) and ensure reliable non-conduction during normal operation while guaranteeing activation within a tightly controlled window during overvoltage events. The SMBG30A-E3/5B exhibits <1.0 μA leakage at V_WM.

Does SMBG30A-E3/5B have bidirectional capability?

No, SMBG30A-E3/5B is a unidirectional transient voltage suppressor. Its part number suffix "A" (not "CA") and cathode-band marking confirm unidirectional polarity. Bidirectional variants in the same family use the "CA" suffix (e.g., SMBG30CA). The SMBG30A-E3/5B conducts only in reverse bias above V_BR; forward conduction follows standard diode behavior up to its 100 A I_FSM rating.

What package type does SMBG30A-E3/5B use and what are its key mechanical features?

SMBG30A-E3/5B uses the SMBG (DO-215AA) surface-mount package: a low-profile gull-wing outline measuring 0.235" × 0.130" (5.97 mm × 3.30 mm), with 0.030" lead width and 0.075" lead spacing. It features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, UL 94 V-0 molding compound, and a cathode band for polarity identification. The SMBG30A-E3/5B is supplied in 13" tape-and-reel (3200 pcs/reel) with code "5B".

SMBG30A-E3/5B 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):: 30V

Voltage - Breakdown (Min):: 33.3V

Voltage - Clamping (Max) @ Ipp:: 48.4V

Current - Peak Pulse (10/1000µs):: 12.4A

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)

SMBG30A-E3/5B FAQ

1.How can I place an order for SMBG30A-E3/5B through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG30A-E3/5B 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 SMBG30A-E3/5B reliable?

The price and inventory of SMBG30A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG30A-E3/5B is usually 5 days.

3.What payment methods are accepted for SMBG30A-E3/5B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30A-E3/5B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG30A-E3/5B?

SMBG30A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG30A-E3/5B 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 SMBG30A-E3/5B?

For technical support, including SMBG30A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30A-E3/5B requirements.

6.How does Aetrix verify that SMBG30A-E3/5B is sourced from the original manufacturer or authorized distributors?

All SMBG30A-E3/5B 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 SMBG30A-E3/5B meets industry standards.

7.What is the process for return or replacement of SMBG30A-E3/5B?

All SMBG30A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30A-E3/5B, 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 SMBG30A-E3/5B part is unused and in its original packaging.

Return procedure for SMBG30A-E3/5B:

1.Submit a request within 90 days.

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

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