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

Vishay General Semiconductor - Diodes Division SMBG17A-M3/5B

Name: SMBG17A-M3/5B
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG17A-M3/5B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG17A-M3/5B

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG17A-M3/5B.pdf

Description:: TVS DIODE 17VWM 27.6VC DO215AA

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Product details

Overview

SMBG17A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V stand-off voltage (V_WM), 18.9–20.9 V breakdown voltage (V_BR) at 1 mA, 600 W peak pulse power (10/1000 µs), 27.6 V maximum clamping voltage (V_C) at 21.7 A, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SMBG17A-M3/5B datasheet, SMBG17A-M3/5B pinout, SMBG17A-M3/5B application, or SMBG17A-M3/5B equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity with cathode band marking, thermal resistance (R_θJA = 100 °C/W), and halogen-free RoHS compliance per M3 suffix.

Technical Context

This TVS diode operates as a fast-acting shunt protector, clamping transient voltages above its breakdown threshold to safeguard downstream ICs, MOSFETs, and sensor signal lines. Its glass-passivated junction ensures stable leakage (<1.0 µA at V_WM) and low incremental surge resistance, enabling precise voltage limiting during ESD or inductive switching events.

The device is rated for -55 °C to +150 °C junction temperature, supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-volume automated SMT assembly without moisture sensitivity concerns.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	17 V - Maximum continuous reverse operating voltage before clamping initiates
V_BR (min/max)	18.9 V / 20.9 V at 1 mA - Ensures reliable turn-on within tight tolerance for predictable protection threshold
V_C @ I_PPM	27.6 V at 21.7 A - Limits voltage seen by protected circuit during 600 W transient event
P_PPM	600 W (10/1000 µs) - Withstands high-energy surges common in automotive load-dump and industrial switching
I_FSM	100 A (8.3 ms half-sine) - Handles single-event inrush without failure in power rail protection
T_J max	+150 °C - Enables operation in under-hood automotive or high-ambient industrial environments
Package	SMBG (DO-215AA) - Low-profile surface-mount package with 0.255" × 0.155" footprint for space-constrained PCBs

Pinout & Package

SMBG17A-M3/5B uses the SMBG (DO-215AA) package: a gull-wing surface-mount outline with cathode marked by a band on the case. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal in forward bias; connected to system ground or low-side reference	Provides return path during clamping; must be routed with low-inductance trace to minimize overshoot
Cathode	Current exit terminal in forward bias; marked by band on package body	Connected to protected line (e.g., CAN_H, LIN, sensor supply); defines unidirectional conduction direction

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces
Halogen-free & RoHS compliant (M3)	Meets environmental compliance requirements for global OEM supply chains without compromising thermal or electrical performance
600 W peak pulse power (10/1000 µs)	Protects against ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surge events in 12 V systems
Fast response time & low clamping ratio	Clamps within picoseconds with V_C/V_BR ≈ 1.42 - minimizing stress on downstream silicon
MSL Level 1, 260 °C peak reflow	Enables single-pass lead-free reflow without baking or special handling in high-throughput SMT lines

Applications

Automotive Power Line Protection	Industrial Sensor Signal Line Protection
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients up to 35 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp overvoltage before it reaches regulator inputs. Use Value: SMBG17A-M3/5B's 27.6 V clamping at 21.7 A ensures downstream LDOs and microcontrollers remain below absolute maximum ratings during 600 W surges.	Use Scenario: Safeguarding analog outputs of pressure/temperature sensors exposed to ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Point-of-entry protection on sensor output traces, mounted adjacent to connector to intercept transients before reaching ADC input. Use Value: With 1.0 µA max leakage at 17 V, SMBG17A-M3/5B avoids signal offset or gain error in precision 4–20 mA or 0–10 V sensor circuits.
Automotive LIN Bus Protection	Consumer Appliance Motor Driver Protection
Use Scenario: Securing LIN transceiver pins against ESD (IEC 61000-4-2 ±8 kV contact) and coupled noise from nearby solenoids or relays. IC Role / Device Role / Timing Role: Bidirectional-capable design not applicable; SMBG17A-M3/5B used unidirectionally on LIN bus line referenced to ground, with cathode to LIN. Use Value: Sub-30 V clamping prevents latch-up or damage to LIN PHY while maintaining bus integrity during fast transients due to <1 ns response.	Use Scenario: Shielding gate drivers and bootstrap circuits in BLDC motor inverters from commutation-induced voltage spikes. IC Role / Device Role / Timing Role: Mounted across low-side MOSFET source-to-ground or high-side bootstrap capacitor to absorb inductive kickback energy. Use Value: 100 A surge rating allows SMBG17A-M3/5B to survive repeated 8.3 ms half-sine surges during motor startup/stall conditions without degradation.

Automotive Power Line Protection

Industrial Sensor Signal Line Protection

Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients up to 35 V and ISO 7637-2 pulses.

IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp overvoltage before it reaches regulator inputs.

Use Value: SMBG17A-M3/5B's 27.6 V clamping at 21.7 A ensures downstream LDOs and microcontrollers remain below absolute maximum ratings during 600 W surges.

Use Scenario: Safeguarding analog outputs of pressure/temperature sensors exposed to ESD and cable discharge events in factory automation.

IC Role / Device Role / Timing Role: Point-of-entry protection on sensor output traces, mounted adjacent to connector to intercept transients before reaching ADC input.

Use Value: With 1.0 µA max leakage at 17 V, SMBG17A-M3/5B avoids signal offset or gain error in precision 4–20 mA or 0–10 V sensor circuits.

Automotive LIN Bus Protection

Consumer Appliance Motor Driver Protection

Use Scenario: Securing LIN transceiver pins against ESD (IEC 61000-4-2 ±8 kV contact) and coupled noise from nearby solenoids or relays.

IC Role / Device Role / Timing Role: Bidirectional-capable design not applicable; SMBG17A-M3/5B used unidirectionally on LIN bus line referenced to ground, with cathode to LIN.

Use Value: Sub-30 V clamping prevents latch-up or damage to LIN PHY while maintaining bus integrity during fast transients due to <1 ns response.

Use Scenario: Shielding gate drivers and bootstrap circuits in BLDC motor inverters from commutation-induced voltage spikes.

IC Role / Device Role / Timing Role: Mounted across low-side MOSFET source-to-ground or high-side bootstrap capacitor to absorb inductive kickback energy.

Use Value: 100 A surge rating allows SMBG17A-M3/5B to survive repeated 8.3 ms half-sine surges during motor startup/stall conditions without degradation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBG17A-E3/5B	Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3)	Acceptable for industrial use where halogen-free requirement is not mandated	Select SMBG17A-E3/5B if environmental compliance only requires RoHS, not halogen-free materials
SMBG17CA-M3/5B	Bidirectional variant; symmetric V_BR (18.9–20.9 V), no polarity marking, same V_C and P_PPM	Required for AC-coupled or floating signal lines (e.g., USB D+/D−, RS-485) where polarity reversal may occur	Choose SMBG17CA-M3/5B when protecting bidirectional data lines or transformer-coupled interfaces

Compared with SMBG17A-M3/5B, the E3 variant offers identical protection performance without halogen-free assurance, while the CA version enables polarity-agnostic clamping at the cost of slightly higher capacitance - making each suitable for distinct grounding architectures and compliance mandates.

Availability

SMBG17A-M3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer appliance power management requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability validation.

Supply support for SMBG17A-M3/5B 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, TVS devices, and optoelectronics with emphasis on high-reliability, automotive-qualified components.

The SMBG series was engineered specifically for surface-mount transient suppression in harsh environments - balancing high surge capability, low clamping voltage, and robust manufacturability for automotive and industrial end equipment.

FAQ

What is the clamping voltage of SMBG17A-M3/5B at its rated peak pulse current?

The SMBG17A-M3/5B has a maximum clamping voltage (V_C) of 27.6 V at its peak pulse current (I_PPM) of 21.7 A, measured using a 10/1000 µs waveform. This value is critical for ensuring protected ICs remain within their absolute maximum voltage ratings during surge events, and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2.

Is SMBG17A-M3/5B suitable for automotive applications?

Yes, SMBG17A-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and body-control modules. Its -55 °C to +150 °C operating range, 100 A surge capability, and MSL Level 1 reflow compatibility make it appropriate for engine management, lighting, and sensor interface designs where SMBG17A-M3/5B is specified.

What does the "M3" suffix indicate in SMBG17A-M3/5B?

The "M3" suffix in SMBG17A-M3/5B denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements. It distinguishes SMBG17A-M3/5B from E3 (RoHS only) and HM3 (AEC-Q101 + halogen-free) variants, confirming material compliance for strict environmental programs.

How does SMBG17A-M3/5B differ from SMBG17CA-M3/5B?

SMBG17A-M3/5B is unidirectional with cathode band marking and optimized for DC-biased lines like power rails or LIN buses, whereas SMBG17CA-M3/5B is bidirectional with symmetric breakdown and no polarity marking - required for AC-coupled or floating signals such as RS-485 or USB. Both share identical V_BR, V_C, and P_PPM, but SMBG17A-M3/5B cannot replace SMBG17CA-M3/5B in bidirectional applications.

What is the thermal resistance of SMBG17A-M3/5B, and how does it affect layout?

SMBG17A-M3/5B has a typical junction-to-ambient thermal resistance (R_θJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and thermal vias - undersized pads will cause excessive temperature rise, degrading SMBG17A-M3/5B's surge endurance and long-term reliability.

SMBG17A-M3/5B 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):: 17V

Voltage - Breakdown (Min):: 18.9V

Voltage - Clamping (Max) @ Ipp:: 27.6V

Current - Peak Pulse (10/1000µs):: 21.7A

Power - Peak Pulse:: 600W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -65°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMBG)

SMBG17A-M3/5B FAQ

1.How can I place an order for SMBG17A-M3/5B through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG17A-M3/5B 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 SMBG17A-M3/5B reliable?

The price and inventory of SMBG17A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG17A-M3/5B is usually 5 days.

3.What payment methods are accepted for SMBG17A-M3/5B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG17A-M3/5B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG17A-M3/5B?

SMBG17A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG17A-M3/5B 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 SMBG17A-M3/5B?

For technical support, including SMBG17A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG17A-M3/5B requirements.

6.How does Aetrix verify that SMBG17A-M3/5B is sourced from the original manufacturer or authorized distributors?

All SMBG17A-M3/5B 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 SMBG17A-M3/5B meets industry standards.

7.What is the process for return or replacement of SMBG17A-M3/5B?

All SMBG17A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG17A-M3/5B, 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 SMBG17A-M3/5B part is unused and in its original packaging.

Return procedure for SMBG17A-M3/5B:

1.Submit a request within 90 days.

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

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