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Vishay General Semiconductor - Diodes Division SMBG28A-E3/5B
- Part No.:
- SMBG28A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28A-E3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,985
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Product details
Overview
SMBG28A-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 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 supply inputs and industrial sensor interfaces.
For engineers reviewing the SMBG28A-E3/5B datasheet, SMBG28A-E3/5B pinout, SMBG28A-E3/5B application, or SMBG28A-E3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds VBR to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMBG package provides MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports ≤1.0 µA reverse leakage at 28 V, and exhibits typical thermal resistance of 100 °C/W (junction-to-ambient) under standard PCB mounting conditions.
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 reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W - Peak pulse power handling capability per 10/1000 µs waveform, duty cycle 0.01 % |
| IFSM | 100 A - Withstands single 8.3 ms half-sine surge, critical for load-dump protection |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or common return path; defines clamping reference point |
| Cathode | Protected line input | Connected to line being protected (e.g., 24 V rail); conducts transient current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients like ISO 7637-2 Pulse 5a (load dump) without degradation |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and body modules |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without preconditioning |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage across temperature and life cycles |
| Low profile SMBG package | 0.255" × 0.155" footprint enables compact layout in space-constrained ECUs and sensor nodes |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump and jump-start surges per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO/regulator stage. Use Value: Limits clamped voltage to 45.4 V, preventing damage to 36 V-rated input stages and ensuring system reset integrity. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS on signal line to ground, activated within <1 ns to shunt transient energy away from precision DAC or op-amp output. Use Value: Maintains signal integrity with ≤1.0 µA leakage at 28 V, avoiding offset errors in µA-level current loops. |
| Telecom DC Power Interface | Consumer Appliance Motor Driver Protection |
Use Scenario: Safeguarding PoE-powered equipment front-end against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter, coordinated with upstream fuse and downstream π-filter. Use Value: 600 W rating absorbs multiple 10/1000 µs surges without derating, supporting EN 61000-4-5 Level 3 compliance. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback during PWM commutation. Use Value: 100 A IFSM withstands repeated motor stall events; 150 °C TJ max supports sealed enclosure thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/5B | Same VWM/VBR/VC specs but SMB (DO-214AA) package; 10% larger footprint, higher RθJA (120 °C/W) | Limited to non-AEC-Q101 designs; lower surge current rating (12.3 A vs. 13.2 A) | Select when legacy SMB layout exists and AEC-Q101 is not required |
| 1.5SMC28A | Same electrical specs but SMC (DO-214AB) package; 2× larger footprint, higher thermal mass, 1000 W PPPM | Used where board space allows and higher single-pulse energy absorption is needed | Choose for industrial UPS or power supply designs requiring >600 W margin |
Compared with SMBJ28A-E3/5B and 1.5SMC28A, the SMBG28A-E3/5B offers AEC-Q101 qualification and optimized thermal performance in the smallest qualified footprint, making it preferred for next-gen automotive and space-constrained industrial modules.
Availability
SMBG28A-E3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, AEC-Q101 compliance, and high-reliability transient suppression.
Supply support for SMBG28A-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, efficiency, and application-specific optimization.
The SMBG series was engineered for high-volume automotive and industrial applications demanding AEC-Q101 qualification, low-profile SMT packaging, and repeatable clamping performance under harsh thermal and electrical stress.
FAQ
What is the clamping voltage of SMBG28A-E3/5B at its rated peak pulse current?
The SMBG28A-E3/5B has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current of 13.2 A, measured using the standardized 10/1000 µs waveform. This value ensures downstream components rated for ≤48 V operation remain within safe voltage limits during transient events. The SMBG28A-E3/5B achieves this with low incremental surge resistance, contributing to consistent clamping behavior across production lots.
Is SMBG28A-E3/5B suitable for automotive applications?
Yes, SMBG28A-E3/5B is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body electronics, and ADAS sensor modules. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validation across temperature cycling, HTRB, and ESD tests confirm suitability for under-hood and cabin environments. The SMBG28A-E3/5B meets requirements for ISO 7637-2 load dump protection in 24 V systems.
What does the "E3/5B" suffix indicate in SMBG28A-E3/5B?
The "E3" denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This configuration supports high-speed SMT assembly lines and aligns with Vishay's standard ordering nomenclature for surface-mount TVS diodes. The SMBG28A-E3/5B is distinct from HE3-suffixed variants, which carry AEC-Q101 qualification.
How does SMBG28A-E3/5B compare to bidirectional TVS diodes like SMBG28CA?
The SMBG28A-E3/5B is unidirectional and intended for DC line protection where polarity is fixed, offering lower leakage (<1.0 µA at 28 V) and higher surge current capability than its bidirectional counterpart SMBG28CA. Bidirectional versions lack polarity marking and conduct in both directions, making them suitable for AC or data-line applications. For 24 V DC power rails, the SMBG28A-E3/5B provides superior clamping precision and lower standby loss.
What PCB layout guidance applies to SMBG28A-E3/5B for optimal thermal and electrical performance?
Vishay specifies mounting SMBG28A-E3/5B on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and thermal resistance of 100 °C/W. Traces to the SMBG28A-E3/5B should be short and wide to minimize inductance, and ground planes must be solid beneath the device. Avoid thermal relief on pads, and ensure cathode band orientation matches silkscreen polarity to prevent reverse-bias failure during transients.
SMBG28A-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):
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG28A-E3/5B FAQ
1.How can I place an order for SMBG28A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28A-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 SMBG28A-E3/5B reliable?
The price and inventory of SMBG28A-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 SMBG28A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG28A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28A-E3/5B?
SMBG28A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28A-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 SMBG28A-E3/5B?
For technical support, including SMBG28A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28A-E3/5B requirements.
6.How does Aetrix verify that SMBG28A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG28A-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 SMBG28A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG28A-E3/5B?
All SMBG28A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28A-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 SMBG28A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG28A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28A-E3/5B Tags
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