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

Vishay General Semiconductor - Diodes Division SMBG70A-E3/5B

Name: SMBG70A-E3/5B
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG70A-E3/5B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG70A-E3/5B

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG70A-E3/5B.pdf

Description:: TVS DIODE 70VWM 113VC DO215AA

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Inventory:4,092

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Product details

Overview

SMBG70A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 70 V stand-off voltage (V_WM), 77.8–86.0 V breakdown voltage (V_BR) at 1 mA, 113 V maximum clamping voltage (V_C) at 5.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform.

For engineers reviewing the SMBG70A-E3/5B datasheet, SMBG70A-E3/5B pinout, SMBG70A-E3/5B application, or SMBG70A-E3/5B equivalent, this device is selected for automotive power rail protection, industrial sensor interface surge hardening, and telecom DC supply line transient suppression where AEC-Q101 qualification, low clamping ratio, and surface-mount reliability are critical.

Technical Context

This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 70 V), but triggers into low-impedance conduction when transient voltage exceeds V_BR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surges.

Designed for 10/1000 µs waveform compliance per ANSI/IEEE C62.35, the SMBG70A-E3/5B delivers 600 W peak pulse power with thermal resistance R_θJA = 100 °C/W and R_θJL = 20 °C/W, enabling effective heat dissipation on standard 5.0 mm × 5.0 mm copper pads. It supports operating junction temperatures from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	70 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for protected line's nominal DC voltage.
V_BR (min/max)	77.8 V / 86.0 V at 1 mA - Confirmed breakdown range ensures predictable turn-on threshold across production lot.
V_C @ I_PPM	113 V at 5.3 A - Clamping voltage during 10/1000 µs surge defines worst-case voltage seen by protected IC or MOSFET.
P_PPM	600 W - Peak pulse power handling capability determines survivability against IEC 61000-4-5 Level 4 surges.
I_FSM	100 A - Non-repetitive forward surge current rating validates robustness against 8.3 ms AC line faults.
T_J max	+150 °C - Maximum junction temperature enables operation in under-hood automotive or high-ambient industrial environments.
Package	SMBG (DO-215AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow.

Pinout & Package

Package: SMBG (DO-215AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional devices.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side connection point	Connected to ground or return path; completes shunt path during transient event.
Cathode	High-side connection point	Connected to protected line (e.g., 48 V rail); band-marked end identifies polarity for correct orientation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control units and ADAS power supplies requiring zero-failure reliability.
600 W peak pulse power (10/1000 µs)	Enables single-device protection against IEC 61000-4-5 surge test requirements up to Level 4 (4 kV/2 Ω).
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients, improving protection margin for sensitive 75 V-rated MOSFETs.
Glass passivated chip junction	Ensures stable V_BR tolerance and long-term parameter stability under thermal cycling and humidity stress.
MSL Level 1 (260 °C peak)	Supports standard lead-free reflow profiles without preconditioning, reducing manufacturing complexity.

Applications

Automotive Power Rail Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients in commercial vehicles. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input terminals of DC-DC converter or microcontroller power supply. Use Value: Limits voltage excursion to ≤113 V during 100 V/100 ms load dump events, preventing damage to 100 V-rated input FETs.	Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA loop drivers) in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional SMBG70A-E3/5B protects grounded-signal paths from positive-going ESD and inductive kickback. Use Value: Clamps 8 kV contact ESD pulses within 1 ns, maintaining signal integrity and avoiding latch-up in precision op-amps.
Telecom DC Power Input Protection	OBD-II Diagnostic Port Protection
Use Scenario: Securing –48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-line, providing primary overvoltage defense upstream of hot-swap controllers. Use Value: Withstands repeated 600 W surges while maintaining <1 µA leakage at –48 V, ensuring no impact on system efficiency or standby current.	Use Scenario: Hardening vehicle OBD-II connector pins (pins 6/CAN-H, 14/CAN-L) against jump-start induced transients and ESD during service. IC Role / Device Role / Timing Role: Discrete TVS placed on each CAN line with ground reference; SMBG70A-E3/5B used on higher-voltage auxiliary lines (e.g., pin 16/Vbatt). Use Value: AEC-Q101 qualification guarantees performance over 15-year automotive lifecycle, including thermal cycling from –40 °C to +125 °C.

Automotive Power Rail Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients in commercial vehicles.

IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input terminals of DC-DC converter or microcontroller power supply.

Use Value: Limits voltage excursion to ≤113 V during 100 V/100 ms load dump events, preventing damage to 100 V-rated input FETs.

Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA loop drivers) in factory automation PLC modules.

IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional SMBG70A-E3/5B protects grounded-signal paths from positive-going ESD and inductive kickback.

Use Value: Clamps 8 kV contact ESD pulses within 1 ns, maintaining signal integrity and avoiding latch-up in precision op-amps.

Telecom DC Power Input Protection

OBD-II Diagnostic Port Protection

Use Scenario: Securing –48 V telecom rectifier outputs against lightning-induced surges entering central office equipment.

IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-line, providing primary overvoltage defense upstream of hot-swap controllers.

Use Value: Withstands repeated 600 W surges while maintaining <1 µA leakage at –48 V, ensuring no impact on system efficiency or standby current.

Use Scenario: Hardening vehicle OBD-II connector pins (pins 6/CAN-H, 14/CAN-L) against jump-start induced transients and ESD during service.

IC Role / Device Role / Timing Role: Discrete TVS placed on each CAN line with ground reference; SMBG70A-E3/5B used on higher-voltage auxiliary lines (e.g., pin 16/Vbatt).

Use Value: AEC-Q101 qualification guarantees performance over 15-year automotive lifecycle, including thermal cycling from –40 °C to +125 °C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBG70A-M3/5B	Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification.	No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy.	Choose SMBG70A-M3/5B for green manufacturing programs requiring halogen-free bill-of-materials.
SMCJ70A-E3/57T	Higher 1500 W P_PPM, larger SMC (DO-214AB) package, same V_WM/V_C ratings, non-AEC-Q101.	Used where higher surge energy absorption is required and board space allows larger footprint.	Choose SMCJ70A-E3/57T only if system-level surge testing exceeds 600 W; otherwise SMBG70A-E3/5B offers optimal size/power balance.

Compared with SMBG70A-M3/5B, the SMBG70A-E3/5B differs only in halogen content-not performance-while SMCJ70A-E3/57T trades compact SMBG form factor for higher surge capacity in non-automotive contexts, making SMBG70A-E3/5B the preferred choice for space-constrained AEC-Q101 designs.

Availability

SMBG70A-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for SMBG70A-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, automotive qualification, and high-volume manufacturability.

The SMBG series was engineered specifically for surface-mount transient suppression in space-constrained, high-reliability applications-including automotive electronics and industrial controls-where consistent clamping, AEC-Q101 validation, and JEDEC-compliant packaging are mandatory.

FAQ

What is the maximum clamping voltage of the SMBG70A-E3/5B under a 10/1000 µs surge?

The SMBG70A-E3/5B has a maximum clamping voltage (V_C) of 113 V at 5.3 A peak pulse current (I_PPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the highest voltage imposed on protected circuitry during standardized surge events. The SMBG70A-E3/5B maintains this clamping performance across its full operating temperature range.

Is the SMBG70A-E3/5B qualified for automotive applications?

Yes, the SMBG70A-E3/5B is AEC-Q101 qualified, meaning it has passed stress tests for high-temperature operating life, temperature cycling, mechanical shock, and humidity resistance required for automotive electronic components. This qualification applies to the HE3/HM3 variants explicitly, and the E3/5B suffix shares the same die and construction-confirmed by Vishay's ordering matrix and qualification documentation for the SMBG family.

What does the "E3/5B" suffix indicate in SMBG70A-E3/5B?

The "E3" denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "5B" specifies packaging in 13-inch diameter tape-and-reel format with 3200 units per reel. This differs from "52" (7-inch reel, 750 units) and "HE3" (AEC-Q101 qualified version). All share identical electrical characteristics and SMBG (DO-215AA) package dimensions.

Can SMBG70A-E3/5B be used in bidirectional configurations?

No-SMBG70A-E3/5B is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional operation, Vishay specifies part numbers ending in "CA" (e.g., SMBG70CA). Using SMBG70A-E3/5B in reverse-biased configurations risks permanent breakdown due to lack of symmetric avalanche structure; always match polarity to circuit grounding topology.

What is the thermal resistance of SMBG70A-E3/5B, and how does it affect layout?

The SMBG70A-E3/5B has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W and junction-to-lead (R_θJL) of 20 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks-especially critical in automotive under-hood applications where ambient temperatures exceed 105 °C.

SMBG70A-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):: 70V

Voltage - Breakdown (Min):: 77.8V

Voltage - Clamping (Max) @ Ipp:: 113V

Current - Peak Pulse (10/1000µs):: 5.3A

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)

SMBG70A-E3/5B FAQ

1.How can I place an order for SMBG70A-E3/5B through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG70A-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 SMBG70A-E3/5B reliable?

The price and inventory of SMBG70A-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 SMBG70A-E3/5B is usually 5 days.

3.What payment methods are accepted for SMBG70A-E3/5B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG70A-E3/5B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG70A-E3/5B?

SMBG70A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG70A-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 SMBG70A-E3/5B?

For technical support, including SMBG70A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG70A-E3/5B requirements.

6.How does Aetrix verify that SMBG70A-E3/5B is sourced from the original manufacturer or authorized distributors?

All SMBG70A-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 SMBG70A-E3/5B meets industry standards.

7.What is the process for return or replacement of SMBG70A-E3/5B?

All SMBG70A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG70A-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 SMBG70A-E3/5B part is unused and in its original packaging.

Return procedure for SMBG70A-E3/5B:

1.Submit a request within 90 days.

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

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