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Vishay General Semiconductor - Diodes Division SMBG28CA-E3/52
- Part No.:
- SMBG28CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28CA-E3/52.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,643
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Product details
Overview
SMBG28CA-E3/52 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), 13.2 A peak pulse current (IPPM), and 45.4 V maximum clamping voltage (VC) - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG28CA-E3/52 datasheet, SMBG28CA-E3/52 pinout, SMBG28CA-E3/52 application, or SMBG28CA-E3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), and mounting pad layout compliance per DO-215AA mechanical spec.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and leakage characteristics across reverse and forward directions. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is qualified to AEC-Q101 for automotive under-hood and chassis applications - validated with 100 A IFSM surge rating (unidirectional test condition, applicable to bidirectional conduction path).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on during ESD or load-dump events. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 600 W transient; limits downstream IC stress to safe levels in 12 V/24 V systems. |
| PPPM | 600 W (10/1000 µs waveform) - Sustains high-energy surges without failure; supports ISO 7637-2 Pulse 1/2a/5a compliance when properly mounted. |
| IPPM | 13.2 A - Peak current capability at VC; determines minimum PCB trace width and pad thermal mass required for reliability. |
| TJ max. | +150 °C - Enables placement near heat sources (e.g., power MOSFETs, motor drivers); supports extended automotive temperature range. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on 5.0 mm × 5.0 mm copper pads; guides heatsinking and layout derating. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A (bidirectional) | One end of symmetrical P-N junction; connects to protected line (e.g., CAN_H or LIN bus) without polarity constraint. |
| Cathode | Terminal K (bidirectional) | Other end of symmetrical P-N junction; ties to same protected line as Anode - forms center-tapped clamping path between line and ground or differential pair. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for orientation-aware placement on differential buses like CAN or RS-485. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, ADAS sensor, and body electronics. |
| Low-profile SMBG package | Height ≤ 2.10 mm - enables use in space-constrained modules (e.g., radar front-ends, compact ECUs) while maintaining 600 W surge capability. |
| Glass-passivated junction | Stable VBR tolerance and low leakage (<1.0 µA at VWM) over lifetime - ensures long-term protection integrity in industrial environments. |
| MSL Level 1 rating | Compatible with standard 260 °C lead-free reflow profiles without preconditioning - simplifies SMT assembly and avoids moisture-related popcorning. |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Transceiver Interface |
|---|---|
Use Scenario: Protecting high-speed CAN FD networks in powertrain ECUs against ISO 7637-2 load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across CAN_H/CAN_L differential pair, referenced to chassis ground. Use Value: Limits transient overvoltage to ≤45.4 V during 13.2 A surges, preserving transceiver integrity without adding propagation delay or signal distortion. | Use Scenario: Safeguarding RS-485 nodes in factory automation PLCs exposed to motor drive noise and ground potential differences. IC Role / Device Role / Timing Role: Differential-line TVS connected between A/B lines and local ground, absorbing common-mode and differential-mode transients. Use Value: Maintains signal integrity up to 20 Mbps by minimizing junction capacitance (<100 pF at 0 V) while clamping ±45.4 V peaks. |
| Automotive Sensor Signal Line Protection | Power Supply Rail Clamp (12 V Systems) |
Use Scenario: Shielding analog outputs (e.g., pressure, temperature sensors) in ADAS camera modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional or bidirectional clamp on single-ended sensor output line, grounded at system reference. Use Value: Provides sub-nanosecond response to 8 kV contact ESD (IEC 61000-4-2), limiting voltage excursion to <45.4 V before sensor ADC input stage. | Use Scenario: Secondary overvoltage clamp on 12 V battery rail downstream of primary DC/DC converter, guarding against alternator load dump. IC Role / Device Role / Timing Role: Parallel-connected bidirectional TVS between VBAT and GND, activated only above 31.1 V. Use Value: Absorbs 600 W energy pulses without degradation, complementing upstream TVS or varistors to meet ISO 16750-2 requirement for 35 V/1 s load dump. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA), slightly larger footprint (4.57 mm × 3.94 mm vs. SMBG's 4.57 mm × 3.94 mm × 2.10 mm height). | Not AEC-Q101 qualified; intended for commercial/industrial use only. | Select SMBJ28CA only for non-automotive designs where AEC-Q101 is not mandated and board height allows SMB profile. |
| SMCJ28CA | Higher PPPM = 1500 W, same VWM/VBR, larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), RθJA ≈ 35 °C/W. | Used where higher surge margin is needed (e.g., 24 V truck systems), but requires more PCB area and thermal management. | Choose SMCJ28CA when 600 W is insufficient and layout permits larger footprint; avoid if height or space is constrained. |
Compared with SMBJ28CA and SMCJ28CA, SMBG28CA-E3/52 uniquely balances AEC-Q101 qualification, low-profile SMBG packaging, and 600 W surge handling - making it optimal for automotive modules where height, reliability, and standardized surge immunity must coexist.
Availability
SMBG28CA-E3/52 is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial RS-485 interface hardening, and 12 V power rail clamping requiring stable component supply and full traceability.
Supply support for SMBG28CA-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments - prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping under harsh thermal and electrical stress.
FAQ
What is the breakdown voltage range for SMBG28CA-E3/52?
The SMBG28CA-E3/52 has a guaranteed bidirectional breakdown voltage (VBR) range of 31.1 V to 34.4 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable turn-on during transients while maintaining margin above its 28 V stand-off voltage - critical for stable operation in 12 V automotive systems where SMBG28CA-E3/52 is commonly deployed.
Is SMBG28CA-E3/52 suitable for automotive applications?
Yes, SMBG28CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis-mounted modules. Its -55 °C to +150 °C operating temperature range, MSL Level 1 reflow compatibility, and validation against mechanical shock, temperature cycling, and humidity bias make SMBG28CA-E3/52 appropriate for CAN bus protection, sensor interfaces, and power rail clamping in production vehicles.
What does the "CA" suffix indicate in SMBG28CA-E3/52?
The "CA" suffix in SMBG28CA-E3/52 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and leakage characteristics. Unlike unidirectional "A" variants, SMBG28CA-E3/52 has no cathode band marking and is used where polarity-independent clamping is required, such as across differential data lines or AC-coupled power rails.
What is the maximum clamping voltage of SMBG28CA-E3/52 at its rated peak pulse current?
The SMBG28CA-E3/52 exhibits a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current (IPPM) of 13.2 A under the standard 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per JEDEC guidelines - ensuring predictable overvoltage limiting for downstream ICs in systems where SMBG28CA-E3/52 serves as the primary transient barrier.
How does the SMBG (DO-215AA) package differ from SMB (DO-214AA) in SMBG28CA-E3/52?
The SMBG (DO-215AA) package used in SMBG28CA-E3/52 features a lower profile (max height 2.10 mm) versus SMB (DO-214AA)'s 2.62 mm, while maintaining identical length and width (4.57 mm × 3.94 mm). This reduced height enables denser layouts in space-limited automotive modules. SMBG28CA-E3/52 also includes AEC-Q101 qualification - a distinction not shared by most SMB-bodied equivalents like SMBJ28CA.
SMBG28CA-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:
- -
- 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-E3/52 FAQ
1.How can I place an order for SMBG28CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28CA-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 SMBG28CA-E3/52 reliable?
The price and inventory of SMBG28CA-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 SMBG28CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG28CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28CA-E3/52?
SMBG28CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28CA-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 SMBG28CA-E3/52?
For technical support, including SMBG28CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28CA-E3/52 requirements.
6.How does Aetrix verify that SMBG28CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG28CA-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 SMBG28CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG28CA-E3/52?
All SMBG28CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28CA-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 SMBG28CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG28CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28CA-E3/52 Tags
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