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 SMBG43C-E3/52

Name: SMBG43C-E3/52
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG43C-E3/52
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SMBG43C-E3/52

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG43C-E3/52.pdf

Description:: TVS DIODE 43VWM 76.7VC DO215AA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,160

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

Product details

Overview

SMBG43C-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 43 V stand-off voltage (V_WM), 47.8–52.8 V breakdown voltage (V_BR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤69.4 V at 8.6 A peak surge current - used in automotive sensor line protection and industrial I/O interface surge hardening.

For engineers reviewing the SMBG43C-E3/52 datasheet, SMBG43C-E3/52 pinout, SMBG43C-E3/52 application, or SMBG43C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.

Technical Context

This bi-directional TVS operates symmetrically in 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 ns), critical for protecting sensitive analog inputs and CAN/LIN bus nodes against ESD and load dump events.

The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 - confirming suitability for under-hood automotive applications where thermal cycling and long-term reliability are essential.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	43 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for 36 V nominal automotive systems.
V_BR (min/max)	47.8 V / 52.8 V at 1 mA - tight 10.5% tolerance ensures predictable turn-on across production lots and temperature.
V_C @ I_PPM	≤69.4 V at 8.6 A - clamping voltage limits stress on downstream ICs during 10/1000 µs transients (e.g., ISO 7637-2 Pulse 1/2a).
P_PPM	600 W - peak pulse power handling supports repetitive surge events at 0.01% duty cycle without degradation.
I_D @ V_WM	≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and battery-backed circuits.
T_J max	+150 °C - enables operation in engine control units, motor drivers, and other high-ambient-temperature environments.
Package	DO-215AA (SMBG) - surface-mount outline with 0.235–0.255 inch body length, optimized for automated pick-and-place and thermal pad layout.

Pinout & Package

DO-215AA (SMBG) package: molded plastic case with gull-wing leads, no polarity marking for bi-directional devices. Terminals are matte tin-plated, solderable per J-STD-002, and meet JESD 201 Class 1A whisker test (E3 suffix).

Pin/Terminal	Circuit Role	Design Meaning
Anode / Cathode (symmetrical)	Bi-directional transient conduction path	No functional distinction between terminals; either lead connects to protected line, the other to ground or reference plane.
Case / Body	Non-electrical mechanical structure	UL 94 V-0 rated molding compound provides flame resistance; no internal thermal or electrical connection to die.

Key Features

Feature	Design Value
Bi-directional clamping	Identical V_BR, V_C, and I_PPM in both directions - eliminates need for orientation-aware layout in differential or AC-coupled signal paths.
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for ECUs and ADAS sensors.
Glass passivated junction	Stable V_BR drift <±5% over lifetime and improved resistance to moisture-induced degradation vs. epoxy-passivated alternatives.
Low thermal resistance	R_θJL = 20 °C/W - enables efficient heat transfer from junction to PCB copper pads, sustaining repeated surges without thermal runaway.
MSL Level 1 rating	Compatible with standard lead-free reflow profiles up to 260 °C peak - no pre-baking required prior to assembly.

Applications

Automotive Sensor Protection	Industrial PLC I/O Protection
Use Scenario: Protecting LIN bus transceivers and analog pressure/temperature sensor outputs in engine compartments exposed to load dump and ISO 16750-2 transients. IC Role / Device Role: Bi-directional voltage clamp placed between signal line and chassis ground, shunting surge energy before it reaches the sensor ASIC. Use Value: Limits transient voltage to ≤69.4 V, preventing latch-up or gate oxide damage in 5 V or 12 V sensor front-ends while maintaining <1 µA leakage at 43 V standby.	Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp on dry-contact or optocoupler input channels, mounted directly at connector entry point. Use Value: Absorbs 600 W pulses without failure, enabling compliance with IEC 61000-4-5 Level 3 (2 kV/12 Ω) while supporting >100,000 surge cycles in factory automation environments.
Telecom Line Interface	Consumer Power Adapter ESD Protection
Use Scenario: Shielding RS-485 transceiver pins in base station remote units subjected to lightning-induced surges on long cable runs. IC Role / Device Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp voltage and fast response for data line integrity. Use Value: Clamps within nanoseconds to <69.4 V, preserving signal eye diagram and meeting ITU-T K.20 immunity requirements for telecom infrastructure.	Use Scenario: Adding robustness to USB-C or barrel-jack input stages of wall adapters against user-handling ESD (IEC 61000-4-2 ±8 kV contact). IC Role / Device Role: First-line transient suppressor between input rectifier output and primary-side controller IC. Use Value: Withstands repeated ±15 kV air/±8 kV contact ESD strikes without parameter shift, verified per AEC-Q101 stress testing protocols.

Automotive Sensor Protection

Industrial PLC I/O Protection

Use Scenario: Protecting LIN bus transceivers and analog pressure/temperature sensor outputs in engine compartments exposed to load dump and ISO 16750-2 transients.

IC Role / Device Role: Bi-directional voltage clamp placed between signal line and chassis ground, shunting surge energy before it reaches the sensor ASIC.

Use Value: Limits transient voltage to ≤69.4 V, preventing latch-up or gate oxide damage in 5 V or 12 V sensor front-ends while maintaining <1 µA leakage at 43 V standby.

Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback.

IC Role / Device Role: Primary overvoltage clamp on dry-contact or optocoupler input channels, mounted directly at connector entry point.

Use Value: Absorbs 600 W pulses without failure, enabling compliance with IEC 61000-4-5 Level 3 (2 kV/12 Ω) while supporting >100,000 surge cycles in factory automation environments.

Telecom Line Interface

Consumer Power Adapter ESD Protection

Use Scenario: Shielding RS-485 transceiver pins in base station remote units subjected to lightning-induced surges on long cable runs.

IC Role / Device Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp voltage and fast response for data line integrity.

Use Value: Clamps within nanoseconds to <69.4 V, preserving signal eye diagram and meeting ITU-T K.20 immunity requirements for telecom infrastructure.

Use Scenario: Adding robustness to USB-C or barrel-jack input stages of wall adapters against user-handling ESD (IEC 61000-4-2 ±8 kV contact).

IC Role / Device Role: First-line transient suppressor between input rectifier output and primary-side controller IC.

Use Value: Withstands repeated ±15 kV air/±8 kV contact ESD strikes without parameter shift, verified per AEC-Q101 stress testing protocols.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ43CA-E3/52	Same V_WM (43 V) and bi-directional configuration, but lower P_PPM = 600 W (same rating), higher V_C = 70.1 V at 8.5 A; DO-214AA (SMB) package with larger footprint.	Less suitable for space-constrained automotive modules due to 2.54 mm lead pitch vs. SMBG's 3.56 mm; identical thermal derating curve.	Select SMBJ43CA-E3/52 only if legacy SMB footprint compatibility is required; SMBG43C-E3/52 offers superior board area efficiency.
1.5KE43CA	Higher P_PPM = 1500 W, axial-leaded DO-201AD package, V_C = 70.1 V at 21.5 A; not surface-mountable or AEC-Q101 qualified.	Restricted to prototyping or through-hole industrial power supplies; incompatible with automated SMT lines and automotive qualification requirements.	Choose 1.5KE43CA only for non-automotive, high-energy surge scenarios where manual assembly and larger size are acceptable.

Compared with SMBJ43CA-E3/52 and 1.5KE43CA, SMBG43C-E3/52 delivers optimal balance of AEC-Q101 compliance, compact DO-215AA footprint, and precise 43 V clamping - making it the preferred choice for production automotive and space-limited industrial designs requiring zero-layout rework.

Availability

SMBG43C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, RoHS-compliant sourcing, and AEC-Q101 traceability.

Supply support for SMBG43C-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 and application-specific performance.

The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, prioritizing AEC-Q101 qualification, tight parametric tolerances, and robust thermal performance in compact packages.

FAQ

What is the polarity marking for SMBG43C-E3/52?

SMBG43C-E3/52 is a bi-directional TVS diode and carries no polarity marking on its DO-215AA (SMBG) package. Unlike uni-directional variants (e.g., SMBG43A), it functions identically regardless of terminal orientation - both leads serve as symmetrical conduction paths during transient events.

Does SMBG43C-E3/52 meet AEC-Q101 requirements?

Yes, SMBG43C-E3/52 is explicitly AEC-Q101 qualified per Vishay documentation (Document Number 88456, Revision 12-Nov-12). This includes stress testing for temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - confirming suitability for automotive powertrain and chassis applications.

What is the maximum clamping voltage for SMBG43C-E3/52 at rated surge current?

The maximum clamping voltage (V_C) for SMBG43C-E3/52 is 69.4 V at 8.6 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream IC overvoltage margin calculations.

Can SMBG43C-E3/52 be used in place of SMBG43A?

No - SMBG43C-E3/52 is bi-directional while SMBG43A is uni-directional. Substituting them requires circuit review: SMBG43A has a cathode band and conducts only in reverse bias, whereas SMBG43C-E3/52 clamps in both directions. Using SMBG43C-E3/52 in a uni-directional design may cause unintended forward conduction.

What PCB pad layout is recommended for SMBG43C-E3/52?

Vishay specifies mounting SMBG43C-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power. The DO-215AA footprint requires 3.56 mm lead spacing; thermal vias under pads are recommended to maintain T_J ≤150 °C during repetitive surges.

SMBG43C-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):: 43V

Voltage - Breakdown (Min):: 47.8V

Voltage - Clamping (Max) @ Ipp:: 76.7V

Current - Peak Pulse (10/1000µs):: 7.8A

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)

SMBG43C-E3/52 FAQ

1.How can I place an order for SMBG43C-E3/52 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG43C-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 SMBG43C-E3/52 reliable?

The price and inventory of SMBG43C-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 SMBG43C-E3/52 is usually 5 days.

3.What payment methods are accepted for SMBG43C-E3/52?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43C-E3/52 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG43C-E3/52?

SMBG43C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG43C-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 SMBG43C-E3/52?

For technical support, including SMBG43C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43C-E3/52 requirements.

6.How does Aetrix verify that SMBG43C-E3/52 is sourced from the original manufacturer or authorized distributors?

All SMBG43C-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 SMBG43C-E3/52 meets industry standards.

7.What is the process for return or replacement of SMBG43C-E3/52?

All SMBG43C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43C-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 SMBG43C-E3/52 part is unused and in its original packaging.

Return procedure for SMBG43C-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 …