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Vishay General Semiconductor - Diodes Division SMBG28A-M3/52
- Part No.:
- SMBG28A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28A-M3/52.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,633
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Product details
Overview
SMBG28A-M3/52 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 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 13.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMBG28A-M3/52 datasheet, SMBG28A-M3/52 pinout, SMBG28A-M3/52 application, or SMBG28A-M3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during voltage transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration provides reverse-biased protection only, with cathode band marking for polarity identification.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Ensures consistent breakdown initiation across production lots |
| VC @ IPPM | 45.4 V at 13.2 A - Limits protected circuit voltage during 600 W transient events |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 μs waveform, 0.01% duty cycle |
| IFSM | 100 A - Withstands single 8.3 ms half-sine surge without degradation (unidirectional only) |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMBG (DO-215AA) - Low-profile surface-mount package compatible with J-STD-020 MSL level 1 reflow |
Pinout & Package
SMBG28A-M3/52 uses the SMBG (DO-215AA) package: molded plastic case with matte tin-plated leads, 0.235–0.255 inch length, 0.130–0.155 inch width, and 0.075–0.095 inch height. Polarity is marked by a cathode band on the case body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased protection terminal | Connected to protected line (e.g., 24 V supply rail); band-marked end identifies this pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Halogen-free & RoHS compliant (M3 suffix) | Meets JEDEC JESD201 Class 2 whisker resistance and environmental compliance requirements |
| Glass passivated junction | Enhances long-term stability and reduces leakage drift under thermal stress and humidity exposure |
| 600 W peak pulse power (10/1000 μs) | Provides robust immunity against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events |
| Low profile SMBG package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) and body control modules (BCMs) from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS diode placed between power rail and chassis ground to clamp surges above 28 V. Use Value: Limits transient voltage to ≤45.4 V during 600 W events, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog input lines of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Reverse-biased TVS connected across signal and ground to absorb fast-rising transients before they reach ADC front-end. Use Value: Sub-nanosecond response and 1.0 μA max leakage at 28 V preserve signal integrity and measurement accuracy. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Protecting PoE-powered network switches and base stations from lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary shunt protector on input stage, coordinated with upstream fuses and secondary filtering. Use Value: 100 A IFSM rating ensures survival of high-energy 8.3 ms surges common in telecom infrastructure. | Use Scenario: Clamping voltage spikes generated by brushed DC motor commutation in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted directly across motor terminals or H-bridge outputs to suppress back-EMF. Use Value: 150 °C TJ max supports operation near heat-generating motor drivers without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG28A-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Preferred for industrial applications where halogen content is unrestricted | Select when halogen-free requirement is not mandated and cost optimization is prioritized |
| SMBG28AHM3/52 | Identical specs plus AEC-Q101 qualification (HM3 suffix denotes AEC-Q101 + halogen-free) | Required for automotive safety-critical subsystems (e.g., ADAS power domains) | Choose for new automotive designs needing full AEC-Q101 validation beyond baseline M3 grade |
Compared with SMBG28A-M3/52, SMBG28A-E3/52 lacks halogen-free certification but offers identical clamping and surge performance, while SMBG28AHM3/52 adds formal AEC-Q101 qualification - making it suitable for functional safety applications where SMBG28A-M3/52 meets general automotive use but not ASIL-level validation requirements.
Availability
SMBG28A-M3/52 is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, and telecom DC feed protection requiring stable component supply, halogen-free compliance, and AEC-Q101-aligned reliability.
Supply support for SMBG28A-M3/52 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 high-reliability, automotive-qualified components.
The SMBG series was developed to deliver high-power transient suppression in compact surface-mount packages for space-constrained automotive and industrial systems demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the clamping voltage of SMBG28A-M3/52 and how is it measured?
The SMBG28A-M3/52 has a maximum clamping voltage (VC) of 45.4 V, measured at a peak pulse current (IPPM) of 13.2 A using a 10/1000 μs double-exponential waveform. This value reflects the actual voltage seen by downstream circuitry during standardized surge events and is guaranteed across the full operating temperature range per Vishay's 88456 datasheet.
Is SMBG28A-M3/52 suitable for automotive applications?
Yes, SMBG28A-M3/52 is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C, making it suitable for under-hood and cabin automotive applications. Its halogen-free (M3) construction and glass-passivated junction meet stringent automotive reliability and environmental requirements, though full ASIL-level qualification requires the HM3 variant.
How does the M3 suffix differ from E3 in SMBG28A-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant, industrial-grade construction meeting JESD201 Class 2 whisker resistance, whereas E3 denotes RoHS-compliant but non-halogen-free material. Both share identical electrical specifications and package dimensions, but SMBG28A-M3/52 satisfies stricter environmental mandates such as EU Directive 2011/65/EU Annex II updates.
What is the thermal resistance of SMBG28A-M3/52 and how does it affect layout?
SMBG28A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) 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 adhere to this minimum pad area and avoid excessive trace impedance between terminals and thermal planes.
Can SMBG28A-M3/52 be used in bidirectional configurations?
No - SMBG28A-M3/52 is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay specifies the CA-suffixed variant (e.g., SMBG28CA). Using SMBG28A-M3/52 in reverse-biased AC applications risks permanent failure due to forward conduction during negative half-cycles.
SMBG28A-M3/52 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBG28A-M3/52 FAQ
1.How can I place an order for SMBG28A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28A-M3/52 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 SMBG28A-M3/52 reliable?
The price and inventory of SMBG28A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG28A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG28A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28A-M3/52?
SMBG28A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28A-M3/52 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 SMBG28A-M3/52?
For technical support, including SMBG28A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28A-M3/52 requirements.
6.How does Aetrix verify that SMBG28A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG28A-M3/52 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 SMBG28A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG28A-M3/52?
All SMBG28A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28A-M3/52, 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 SMBG28A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG28A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28A-M3/52 Tags
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