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

Vishay General Semiconductor - Diodes Division SMBG30C-E3/52

Name: SMBG30C-E3/52
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG30C-E3/52
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG30C-E3/52

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG30C-E3/52.pdf

Description:: TVS DIODE 30VWM 53.5VC DO215AA

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Product details

Overview

SMBG30C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping voltage transients on signal or power lines. It features 30 V stand-off voltage (V_WM), 33.3–36.8 V breakdown voltage (V_BR) at 1 mA, 600 W peak pulse power (10/1000 µs), 48.4 V clamping voltage (V_C) at 12.4 A, and AEC-Q101 qualification for automotive use.

For engineers reviewing the SMBG30C-E3/52 datasheet, SMBG30C-E3/52 pinout, SMBG30C-E3/52 application, or SMBG30C-E3/52 equivalent, key selection considerations include bi-directional clamping capability, low clamping ratio (V_C/V_WM = 1.61), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and suitability for inductive load switching protection in automotive ECUs and sensor interfaces.

Technical Context

This bi-directional TVS operates symmetrically across both polarities, with identical V_BR, V_C, and I_PPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 µA at V_WM) and fast response time (<1.0 ps), enabling effective suppression of ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) events.

The device is rated for T_J = –55 °C to +150 °C operation and exhibits R_θJA = 100 °C/W and R_θJL = 20 °C/W thermal resistance. It meets UL 497B recognition (QVGQ2) and is qualified per AEC-Q101 for automotive under-hood applications requiring high reliability under thermal cycling and mechanical shock.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	30 V - Maximum continuous reverse operating voltage before clamping 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 threshold range; ensures consistent turn-on across production lots and temperature.
V_C @ I_PPM	48.4 V at 12.4 A - Clamped voltage during 600 W transient; limits downstream IC stress to <50 V in 24 V rail protection.
P_PPM	600 W (10/1000 µs) - Peak surge handling capacity; supports repetitive transients up to 0.01% duty cycle without degradation.
I_D @ V_WM	≤1.0 µA - Ultra-low leakage at stand-off voltage; avoids parasitic loading on high-impedance sensor or communication lines.
T_J Range	–55 °C to +150 °C - Full automotive temperature coverage; validated for engine control, body electronics, and ADAS modules.
Qualification	AEC-Q101 qualified - Certified for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock testing.

Pinout & Package

Package: DO-215AA (SMBG), surface-mount gull-wing lead frame with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Bi-directional construction means no polarity marking; device is symmetrical and unmarked.

Pin/Terminal	Circuit Role	Design Meaning
Anode / Cathode (symmetrical)	Bi-directional transient conduction path	Both terminals serve identically as current entry/exit points during positive or negative transients; no cathode band marking required.

Key Features

Feature	Design Value
Bi-directional clamping	Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, LIN, sensor bridges) without polarity concerns.
600 W peak pulse power	Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (load dump simulation) in automotive subsystems.
AEC-Q101 qualification	Validates robustness for automotive safety-critical functions including powertrain, chassis, and ADAS sensors.
MSL Level 1 (260 °C peak)	Supports standard SMT reflow profiles without baking; eliminates pre-conditioning overhead in high-volume manufacturing.
UL 497B recognized (QVGQ2)	Meets telecom and industrial surge protection standards for primary-side interface protection in certified equipment.

Applications

Automotive Sensor Protection	CAN Bus Transient Suppression
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Standby clamping device placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤48.4 V, preserving ADC integrity and preventing latch-up in 3.3 V/5 V MCU inputs.	Use Scenario: Safeguarding CAN H/L differential pair against ESD and coupled transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bi-directional shunt clamp mounted directly at connector interface. Use Value: Maintains signal integrity by clamping common-mode surges while adding <1 pF junction capacitance-no data rate degradation at 1 Mbps.
Industrial PLC I/O Protection	Consumer Appliance Motor Drive Protection
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback of solenoid valves. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input terminal block. Use Value: Absorbs 600 W pulses without failure, enabling >100,000 surge cycles per IEC 61000-4-5 Level 3 compliance.	Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across-the-rail TVS on motor power supply line near H-bridge MOSFETs. Use Value: Prevents MOSFET avalanche failure by clamping 30 V nominal rails to ≤48.4 V, reducing thermal stress during commutation.

Automotive Sensor Protection

CAN Bus Transient Suppression

Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine control units exposed to load dump and alternator ripple.

IC Role / Device Role / Timing Role: Standby clamping device placed between sensor output and microcontroller ADC input.

Use Value: Limits transient excursions to ≤48.4 V, preserving ADC integrity and preventing latch-up in 3.3 V/5 V MCU inputs.

Use Scenario: Safeguarding CAN H/L differential pair against ESD and coupled transients in vehicle body control modules.

IC Role / Device Role / Timing Role: Bi-directional shunt clamp mounted directly at connector interface.

Use Value: Maintains signal integrity by clamping common-mode surges while adding <1 pF junction capacitance-no data rate degradation at 1 Mbps.

Industrial PLC I/O Protection

Consumer Appliance Motor Drive Protection

Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback of solenoid valves.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input terminal block.

Use Value: Absorbs 600 W pulses without failure, enabling >100,000 surge cycles per IEC 61000-4-5 Level 3 compliance.

Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers.

IC Role / Device Role / Timing Role: Across-the-rail TVS on motor power supply line near H-bridge MOSFETs.

Use Value: Prevents MOSFET avalanche failure by clamping 30 V nominal rails to ≤48.4 V, reducing thermal stress during commutation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ30CA-E3/52	Same V_WM (30 V), but lower P_PPM = 600 W (same rating), higher V_C = 48.4 V (identical), same DO-214AB package - differs only in JEDEC outline (DO-214AB vs. DO-215AA) and thermal resistance (R_θJA = 110 °C/W vs. 100 °C/W).	Identical electrical performance; DO-214AB has slightly larger pad footprint and 0.1 mm taller profile - may require PCB layout review.	Select SMBJ30CA-E3/52 only if legacy DO-214AB footprint is fixed; SMBG30C-E3/52 offers better thermal dissipation and smaller board area.
1.5KE30CA-T	Higher P_PPM = 1500 W, axial-leaded DO-15 package, V_C = 48.4 V - same clamping but incompatible mounting and lower reliability in automated SMT lines.	Not suitable for high-density automotive PCBs; intended for prototyping or through-hole industrial boards with manual assembly.	Choose 1.5KE30CA-T only for cost-sensitive non-automotive prototypes; SMBG30C-E3/52 is mandatory for AEC-Q101-compliant SMT production.

Compared with SMBJ30CA-E3/52 and 1.5KE30CA-T, SMBG30C-E3/52 delivers superior thermal performance (R_θJA = 100 °C/W), AEC-Q101 qualification, and optimized gull-wing geometry for fine-pitch placement-making it the preferred choice for automotive and high-reliability industrial SMT designs.

Availability

SMBG30C-E3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and consumer appliance motor drive circuits requiring stable component supply and full AEC-Q101 traceability.

Supply support for SMBG30C-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 automotive-grade qualification.

The SMBG series is engineered specifically for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial automation, and telecom infrastructure where compact size, AEC-Q101 compliance, and repeatable clamping are critical.

FAQ

What is the polarity configuration of SMBG30C-E3/52?

SMBG30C-E3/52 is a bi-directional TVS diode with symmetrical anode/cathode terminals and no polarity marking. Unlike uni-directional variants (e.g., SMBG30A), it provides identical clamping behavior for both positive and negative transients-ideal for AC-coupled or floating signal lines such as CAN bus or bridge sensor outputs. The device is unmarked per specification.

Does SMBG30C-E3/52 meet automotive qualification standards?

Yes, SMBG30C-E3/52 is AEC-Q101 qualified, as confirmed in Vishay's datasheet revision 12-Nov-12 (Document Number: 88456). This certification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and mechanical shock-validating its suitability for engine control, body electronics, and ADAS applications.

What is the maximum clamping voltage of SMBG30C-E3/52 under surge conditions?

The maximum clamping voltage (V_C) of SMBG30C-E3/52 is 48.4 V at 12.4 A peak pulse current (I_PPM), measured with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and ensures downstream circuitry remains within safe voltage limits during standardized surge events like ISO 7637-2 Pulse 1.

Is SMBG30C-E3/52 RoHS-compliant and lead-free?

Yes, SMBG30C-E3/52 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free construction per JEDEC JS709A. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 22-B102 whisker resistance (JESD 201 Class 1A), ensuring long-term reliability in lead-free reflow processes.

How does SMBG30C-E3/52 differ from the SMBJ30CA series?

SMBG30C-E3/52 uses the DO-215AA (SMBG) package with gull-wing leads, offering R_θJA = 100 °C/W and tighter thermal performance than the DO-214AB (SMBJ) package (R_θJA = 110 °C/W). Both share identical V_WM = 30 V, V_BR = 33.3–36.8 V, and V_C = 48.4 V, but SMBG30C-E3/52 is optimized for finer-pitch automated placement and higher thermal efficiency in dense automotive PCB layouts.

SMBG30C-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:: Obsolete

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 30V

Voltage - Breakdown (Min):: 33.3V

Voltage - Clamping (Max) @ Ipp:: 53.5V

Current - Peak Pulse (10/1000µs):: 11.2A

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)

SMBG30C-E3/52 FAQ

1.How can I place an order for SMBG30C-E3/52 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG30C-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 SMBG30C-E3/52 reliable?

The price and inventory of SMBG30C-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 SMBG30C-E3/52 is usually 5 days.

3.What payment methods are accepted for SMBG30C-E3/52?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG30C-E3/52 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG30C-E3/52?

SMBG30C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG30C-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 SMBG30C-E3/52?

For technical support, including SMBG30C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG30C-E3/52 requirements.

6.How does Aetrix verify that SMBG30C-E3/52 is sourced from the original manufacturer or authorized distributors?

All SMBG30C-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 SMBG30C-E3/52 meets industry standards.

7.What is the process for return or replacement of SMBG30C-E3/52?

All SMBG30C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG30C-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 SMBG30C-E3/52 part is unused and in its original packaging.

Return procedure for SMBG30C-E3/52:

1.Submit a request within 90 days.

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

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