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Vishay General Semiconductor - Diodes Division SMBG28CA-E3/5B
- Part No.:
- SMBG28CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28CA-E3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,679
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Product details
Overview
SMBG28CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal and power lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), <1.0 μA reverse leakage at VWM, and clamps to ≤45.4 V at 13.2 A peak pulse current - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMBG28CA-E3/5B datasheet, SMBG28CA-E3/5B pinout, SMBG28CA-E3/5B application, or SMBG28CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 600 W surge rating, low clamping ratio (VC/VBR ≈ 1.4), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in either direction. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device is rated for TJ = –55 °C to +150 °C, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is qualified to AEC-Q101 - confirming suitability for under-hood automotive environments where thermal cycling and long-term reliability are critical.
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 - guaranteed avalanche initiation range defining turn-on threshold |
| VC @ IPPM | ≤45.4 V at 13.2 A - clamped voltage during 600 W transient, limiting stress on downstream ICs |
| ID @ VWM | ≤1.0 μA - negligible leakage current ensuring minimal standby power loss and signal integrity |
| PPPM | 600 W (10/1000 μs) - surge energy handling capacity validated on 5.0 mm × 5.0 mm copper pads |
| TJ max | +150 °C - enables operation in high-temperature automotive and industrial enclosures |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or floating signal lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no band marking required |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over lifetime and temperature extremes |
| Low-profile SMBG package | Reduces board space vs. SMA/SMB while maintaining thermal performance via optimized pad layout |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector entry point to shunt surge energy before it reaches signal conditioning circuitry. Use Value: Limits transient voltage to ≤45.4 V, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends under ISO 16750-2 conditions. | Use Scenario: Shielding PLC digital input modules and RS-485 transceivers from EFT bursts and lightning-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary line-level TVS deployed across differential pairs and supply rails to meet IEC 61000-4-4/4-5 immunity requirements. Use Value: Delivers 600 W surge handling with <1 ns response time, preventing latch-up or permanent damage to isolated interface ICs. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controller ICs against mains-borne surges and capacitor discharge events. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, providing precise clamping to complement coarse overvoltage protection. Use Value: Tight VBR tolerance (±5%) and low VC/VBR ratio ensure predictable let-through voltage without overstressing downstream FETs or controllers. | Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Bidirectional TVS integrated into hybrid coupler circuits to clamp common-mode transients without disrupting DC bias. Use Value: Symmetrical clamping behavior maintains signal balance and minimizes distortion on high-speed data lines up to 100 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-E3/5B | Same VWM (28 V), but lower PPPM = 600 W (same rating), higher VC = 48.3 V at 12.4 A; SMBJ package (DO-214AA) has larger footprint and higher RθJA | Less effective clamping margin (VC/VBR ≈ 1.55 vs. 1.40); less suited for space-constrained automotive PCBs | Select SMBG28CA-E3/5B when board area is limited and tighter clamping is required; SMBJ28CA-E3/5B may be preferred if legacy layout uses DO-214AA footprints. |
| SMCJ28CA-E3/5B | Same VWM and VBR, but PPPM = 1500 W, VC = 49.9 V at 30.1 A; SMC package (DO-214AB) offers higher thermal mass but doubles PCB area | Over-specified for 600 W use cases; introduces unnecessary cost and layout overhead where 600 W suffices | Choose SMBG28CA-E3/5B for optimal cost/size/performance balance in 600 W-class designs; reserve SMCJ28CA-E3/5B for applications requiring >1 kW surge margin. |
Compared with SMBJ28CA-E3/5B and SMCJ28CA-E3/5B, SMBG28CA-E3/5B delivers identical 28 V standoff and 600 W surge rating in the smallest possible footprint (SMBG), with the lowest clamping voltage (45.4 V), making it the most space-efficient and electrically optimal choice for modern automotive and industrial PCBs constrained by size and thermal budget.
Availability
SMBG28CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, and telecom line card protection requiring stable component supply, AEC-Q101 compliance, and repeatable surge performance across production batches.
Supply support for SMBG28CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where compact size, AEC-Q101 validation, and precise clamping are mandatory.
FAQ
What is the polarity configuration of SMBG28CA-E3/5B?
SMBG28CA-E3/5B is a bidirectional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode band marking and is intended for AC-coupled or floating signal paths where transients can occur with either polarity - unlike unidirectional variants such as SMBG28A-E3/5B which feature a cathode band and conduct only in reverse bias.
Does SMBG28CA-E3/5B meet automotive qualification standards?
Yes, SMBG28CA-E3/5B is AEC-Q101 qualified, as confirmed in Vishay's official documentation (Document Number: 88456, Revision: 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), validating its suitability for under-hood automotive applications such as body control modules and ADAS sensor interfaces.
What is the recommended PCB pad layout for SMBG28CA-E3/5B?
The datasheet specifies mounting on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal to achieve rated 600 W peak pulse power. The SMBG (DO-215AA) package requires symmetric thermal pads with solder mask defined openings; minimum pad dimensions are 1.96 mm (0.077") wide and 3.30 mm (0.130") long per side, matching the mechanical outline in Document 88456, page 5.
How does SMBG28CA-E3/5B differ from SMBG28A-E3/5B?
SMBG28CA-E3/5B is bidirectional with identical electrical specs in both polarities, while SMBG28A-E3/5B is unidirectional and features a cathode band. Key differences include: SMBG28A-E3/5B supports 100 A IFSM (8.3 ms half-sine) and has forward voltage VF = 3.5 V at 50 A; SMBG28CA-E3/5B omits IFSM and VF specs since it blocks conduction in forward bias and conducts only during reverse transients in either direction.
Is SMBG28CA-E3/5B RoHS compliant and halogen-free?
SMBG28CA-E3/5B carries the "E3" suffix, indicating RoHS compliance and industrial-grade qualification per Vishay's ordering nomenclature. It is not halogen-free - that designation requires the "M3" suffix (e.g., SMBG28CA-M3/5B). The E3 variant meets JEDEC JESD201 class 2 whisker resistance and J-STD-002 solderability standards.
SMBG28CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG28CA-E3/5B FAQ
1.How can I place an order for SMBG28CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28CA-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 SMBG28CA-E3/5B reliable?
The price and inventory of SMBG28CA-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 SMBG28CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG28CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28CA-E3/5B?
SMBG28CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28CA-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 SMBG28CA-E3/5B?
For technical support, including SMBG28CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28CA-E3/5B requirements.
6.How does Aetrix verify that SMBG28CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG28CA-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 SMBG28CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG28CA-E3/5B?
All SMBG28CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28CA-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 SMBG28CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG28CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28CA-E3/5B Tags
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