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Vishay General Semiconductor - Diodes Division SMBG12CA-E3/5B
- Part No.:
- SMBG12CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12CA-E3/5B.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,666
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Product details
Overview
SMBG12CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 19.9 V at 30.2 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG12CA-E3/5B datasheet, SMBG12CA-E3/5B pinout, SMBG12CA-E3/5B application, or SMBG12CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VBR ≈ 1.43), MSL Level 1 reflow compatibility, 150 °C max junction temperature, and suitability for CAN/LIN bus line protection, sensor I/O, and DC power rail surge suppression.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) transients.
The device delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. It is rated for -55 °C to +150 °C operating junction temperature and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | 19.9 V at 30.2 A - Clamped voltage during 600 W transient; limits stress on downstream ICs to safe levels. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; supports high-energy surge events without failure. |
| IPPM | 30.2 A - Peak pulse current capability; determines survivability against lightning-induced surges (IEC 61000-4-5). |
| Junction Temp. Range | -55 °C to +150 °C - Enables deployment in under-hood automotive, industrial control, and outdoor equipment environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile gull-wing leaded package with matte tin-plated terminals, compliant with J-STD-002 solderability and JESD22-B102 whisker testing. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical junction; conducts during positive transients relative to cathode reference. |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; conducts during negative transients - functionally identical to anode in bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware placement in AC-coupled or differential signal lines. |
| 600 W peak pulse power | Rated per 10/1000 μs waveform at 0.01% duty cycle - provides headroom for repetitive surge events in industrial motor drives and power supplies. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics - assures long-term reliability under thermal and mechanical stress. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - enables standard SMT assembly without moisture sensitivity concerns or baking requirements. |
| UL 497B recognition | QVGQ2 file E136766 - certifies suitability for telecom and data line protection in safety-critical infrastructure. |
Applications
| Automotive Sensor Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine bay or chassis modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across sensor supply and ground pins to divert surge energy before it reaches precision amplifier or ADC input. Use Value: Limits transient voltage to ≤19.9 V while maintaining <1.0 μA leakage at 12 V - preserves sensor accuracy and avoids false triggers in safety-critical systems. |
Use Scenario: Safeguarding CANH/CANL differential pair in automotive ECUs against ESD and coupled transients from adjacent high-power circuits. IC Role / Device Role / Timing Role: Symmetric TVS connected between CANH-GND and CANL-GND (or as common-mode clamp) to suppress common-mode surges without distorting differential signaling. Use Value: Clamps within <1 ns with VC = 19.9 V - prevents CAN transceiver latch-up and maintains bit error rate integrity during 8 kV contact ESD events. |
| Industrial PLC I/O Protection | DC Power Rail Surge Suppression |
Use Scenario: Shielding digital input channels in programmable logic controllers from field-wiring induced surges (e.g., relay coil flyback, lightning coupling). IC Role / Device Role / Timing Role: Parallel-connected TVS on each input line referenced to common ground, absorbing energy before reaching optocoupler or Schmitt trigger input stage. Use Value: Withstands 30.2 A peak pulse current and 600 W surge - exceeds IEC 61000-4-4 Level 4 (2 kV) requirements for industrial environments. |
Use Scenario: Guarding 12 V or 24 V DC power rails in embedded gateways and remote I/O modules against switching transients and accidental reverse polarity. IC Role / Device Role / Timing Role: Shunt protector placed between VIN and GND, activated only during overvoltage events to prevent damage to downstream DC-DC converters and microcontrollers. Use Value: 12 V VWM aligns with nominal rail voltage; 19.9 V clamping ensures MOSFETs and LDOs remain within absolute maximum ratings during 100 V/1 ms surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Same VWM (12 V), but lower PPPM = 600 W (identical), higher VC = 21.2 V at 28.3 A; SMB (DO-214AA) package - 0.083" lead pitch vs. SMBG's 0.077". | Less compact footprint; slightly higher clamping voltage reduces margin for 3.3 V logic interfaces. | Select SMBJ12CA only if legacy PCB layout uses SMB pads or when lower thermal resistance (RθJA = 85 °C/W) is prioritized over space-constrained designs. |
| SMCJ12CA | Same VWM and VBR, but PPPM = 1500 W; larger SMC (DO-214AB) package - 0.205" body width vs. SMBG's 0.170". | Higher surge capacity suits heavy-duty industrial motor controls, but requires more board area and has slower response due to higher junction capacitance (~150 pF vs. ~50 pF). | Choose SMCJ12CA where multi-kA lightning strike immunity (IEC 61000-4-5) is mandatory and board space permits larger footprint. |
Compared with SMBJ12CA and SMCJ12CA, SMBG12CA-E3/5B offers optimal balance of compact SMBG packaging, AEC-Q101 qualification, and precise 19.9 V clamping - making it preferred for space-limited automotive and industrial edge nodes requiring certified reliability and fast transient response.
Availability
SMBG12CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN/LIN bus protection, industrial PLC I/O modules, and DC power rail surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMBG12CA-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 performance.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments, combining AEC-Q101 validation, low-profile packaging, and consistent bidirectional clamping behavior.
FAQ
What is the clamping voltage of SMBG12CA-E3/5B at its rated peak pulse current?
The SMBG12CA-E3/5B clamps to 19.9 V at its peak pulse current of 30.2 A under the standard 10/1000 μs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number: 88456, Rev. 09-Jan-2024), ensuring predictable overvoltage limiting for protected circuitry downstream of the SMBG12CA-E3/5B.
Is SMBG12CA-E3/5B suitable for automotive applications?
Yes, SMBG12CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis-mounted modules. Its -55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and UL 497B recognition make it appropriate for CAN bus protection, sensor interfaces, and power supply inputs in vehicles - all confirmed in the official Vishay SMBG5.0A–SMBG188CA datasheet.
How does the bidirectional design of SMBG12CA-E3/5B affect its circuit implementation?
The SMBG12CA-E3/5B has no polarity marking and exhibits identical electrical characteristics in both directions - meaning it functions identically whether installed with either terminal toward the protected line. This simplifies layout, eliminates orientation errors during automated placement, and enables direct use on AC-coupled signals, differential buses like LIN, or ungrounded power domains where polarity cannot be assumed - a verified feature documented for all CA-suffix SMBG devices.
What is the maximum reverse leakage current for SMBG12CA-E3/5B at its stand-off voltage?
At its 12 V stand-off voltage (VWM), the SMBG12CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, as specified in the Vishay datasheet Table "ELECTRICAL CHARACTERISTICS". This low leakage preserves signal integrity and minimizes standby power loss in battery-powered or high-impedance sensing circuits using SMBG12CA-E3/5B.
Does SMBG12CA-E3/5B meet industry standards for surge immunity testing?
Yes, SMBG12CA-E3/5B supports compliance with IEC 61000-4-2 (ESD ±8 kV contact), IEC 61000-4-4 (EFT ±2 kV), and IEC 61000-4-5 (surge 1 kV line-earth) when properly applied with appropriate PCB layout. Its 600 W peak pulse rating, sub-1 ns response, and UL 497B recognition (file E136766) confirm suitability for these standardized immunity tests - details validated in Vishay's application guidance and certification documentation.
SMBG12CA-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- 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)
SMBG12CA-E3/5B FAQ
1.How can I place an order for SMBG12CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12CA-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 SMBG12CA-E3/5B reliable?
The price and inventory of SMBG12CA-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 SMBG12CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG12CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12CA-E3/5B?
SMBG12CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12CA-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 SMBG12CA-E3/5B?
For technical support, including SMBG12CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12CA-E3/5B requirements.
6.How does Aetrix verify that SMBG12CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG12CA-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 SMBG12CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG12CA-E3/5B?
All SMBG12CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12CA-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 SMBG12CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG12CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12CA-E3/5B Tags
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