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Vishay General Semiconductor - Diodes Division SMBG28A-E3/52
- Part No.:
- SMBG28A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28A-E3/52.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,296
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Product details
Overview
SMBG28A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 28 V stand-off voltage, 31.1–34.4 V breakdown at 1 mA, 45.4 V clamping voltage at 13.2 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform-designed to protect automotive sensor signal lines against inductive switching transients.
For engineers reviewing the SMBG28A-E3/52 datasheet, SMBG28A-E3/52 pinout, SMBG28A-E3/52 application, or SMBG28A-E3/52 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 industrial and automotive PCBs.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 28 V and rapidly transitions to low-impedance conduction above its 31.1–34.4 V breakdown threshold, limiting transient energy to safe levels for downstream ICs. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable avalanche behavior under repetitive surges.
Designed for 10/1000 μs waveform compliance, it delivers 600 W peak pulse power with 0.01% duty cycle derating, and features thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature when mounted on 5.0 mm × 5.0 mm copper pads.
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 - Confirmed breakdown range ensuring predictable turn-on across production lot |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 600 W transient, limiting stress on protected circuitry |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform, validated for automotive load-dump immunity |
| IFSM | 100 A - Surge current rating for 8.3 ms half-sine wave, supporting robustness against inductive kickback |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Leakage @ VWM | ≤1.0 μA - Low reverse leakage preserves signal integrity and minimizes standby power loss |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing lead frame with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; polarity marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional protection configuration |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., sensor output or CAN bus) to clamp positive transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Glass-passivated junction | Ensures stable avalanche characteristics, low leakage drift over time, and resistance to humidity-induced degradation |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| 600 W peak pulse power | Provides margin for ISO 7637-2 Pulse 1/2a/5a transients in 12 V vehicle systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in MOSFETs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and ground to shunt positive transients. Use Value: Limits voltage excursion to ≤45.4 V during 13.2 A surges, preventing damage to 3.3 V/5 V ADC inputs and maintaining signal fidelity. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subject to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to absorb repetitive 600 W transients without degradation. Use Value: Withstands ≥1000 surges at rated power due to low thermal resistance (RθJL = 20 °C/W), extending field service life. |
| Automotive Body Control Module | Telecom Interface Protection |
Use Scenario: Shielding LIN bus transceivers and LED driver outputs from battery reverse-polarity and jump-start events. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC-to-ground path to clamp overvoltage while preserving normal 12 V operation. Use Value: 28 V VWM allows full system operation across cold-crank (6.5 V) to load-dump (up to 40 V) conditions without false triggering. | Use Scenario: Protecting RS-485 transceiver data lines in outdoor base station equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, coordinated with secondary GDT or polymer PTC for multi-stage protection. Use Value: 45.4 V clamping voltage ensures compliance with IEC 61000-4-5 Level 4 (4 kV) when combined with series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/52 | Same VWM (28 V), but lower PPPM (600 W vs. SMBJ's 600 W), identical DO-214AA package (not DO-215AA); slightly higher VC (48.4 V) | DO-214AA has larger pad footprint and higher RθJA; less suitable for dense automotive layouts | Select SMBG28A-E3/52 when board space is constrained and MSL Level 1 reflow compatibility is required. |
| SMCJ28A-E3/52 | Same VWM | DO-214AB package offers higher thermal mass and 1500 W PPPM, but 3× larger footprint and incompatible with SMBG land pattern | Choose SMCJ28A-E3/52 only when higher surge endurance is mandatory and layout allows larger component. |
Compared with SMBJ28A-E3/52 and SMCJ28A-E3/52, SMBG28A-E3/52 uniquely balances compact DO-215AA packaging, AEC-Q101 qualification, and precise 45.4 V clamping-making it optimal for space-constrained, high-reliability automotive signal-line protection where thermal and mechanical constraints rule out larger alternatives.
Availability
SMBG28A-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom interface protection requiring stable component supply, AEC-Q101 compliance, and consistent 600 W transient suppression performance.
Supply support for SMBG28A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive qualification.
The SMBG series was developed specifically for high-density, AEC-Q101-compliant transient suppression in modern automotive ECUs and industrial controls-prioritizing low profile, repeatable clamping, and robust surge endurance in surface-mount form.
FAQ
What is the maximum clamping voltage of SMBG28A-E3/52 under peak pulse conditions?
The SMBG28A-E3/52 has a maximum clamping voltage (VC) of 45.4 V at 13.2 A peak pulse current (IPPM) using a 10/1000 μs waveform. This value is measured and guaranteed per Vishay's datasheet revision 09-Jan-2024 (Document Number: 88456), ensuring predictable overvoltage limiting for protected circuits during transient events.
Is SMBG28A-E3/52 qualified for automotive applications?
Yes, SMBG28A-E3/52 is AEC-Q101 qualified, as confirmed in the Vishay datasheet under "Mechanical Data" and "Ratings and Characteristics Curves" sections. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMBG28A-E3/52 suitable for under-hood and body-control module deployments.
What does the "E3/52" suffix indicate in SMBG28A-E3/52?
The "E3" denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "/52" specifies packaging in 7″ diameter plastic tape and reel with 750 units per reel. This ordering code aligns with Vishay's standardized delivery format for automated SMT assembly and is documented in the "Ordering Information" table of the SMBG5.0A–SMBG188CA datasheet.
Can SMBG28A-E3/52 be used in bidirectional configurations?
No, SMBG28A-E3/52 is unidirectional only, as indicated by the "A" suffix (vs. "CA" for bidirectional variants like SMBG28CA). Its cathode band marking and electrical specifications-including forward voltage drop and single-direction breakdown-are defined exclusively for anode-to-cathode surge conduction toward ground.
What is the thermal resistance specification for SMBG28A-E3/52?
SMBG28A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured with 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. These values are critical for calculating steady-state temperature rise and verifying safe operation at 150 °C maximum junction temperature.
SMBG28A-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:
- 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-E3/52 FAQ
1.How can I place an order for SMBG28A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28A-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 SMBG28A-E3/52 reliable?
The price and inventory of SMBG28A-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 SMBG28A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG28A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28A-E3/52?
SMBG28A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28A-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 SMBG28A-E3/52?
For technical support, including SMBG28A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28A-E3/52 requirements.
6.How does Aetrix verify that SMBG28A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG28A-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 SMBG28A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG28A-E3/52?
All SMBG28A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28A-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 SMBG28A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG28A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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