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Vishay General Semiconductor - Diodes Division SMBG12CA-E3/52
- Part No.:
- SMBG12CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12CA-E3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,431
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Product details
Overview
SMBG12CA-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 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), <1 µA reverse leakage at VWM, and clamps to ≤19.9 V at 30.2 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG12CA-E3/52 datasheet, SMBG12CA-E3/52 pinout, SMBG12CA-E3/52 application, or SMBG12CA-E3/52 equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and direct alternative part comparisons for ESD/surge protection design-in.
Technical Context
The SMBG12CA-E3/52 operates as a symmetrical, bidirectional avalanche diode with no polarity marking - its terminals are functionally identical and conduct in both directions above VBR. It uses a glass-passivated silicon junction and achieves 600 W surge handling per the standardized 10/1000 µs waveform at 0.01% duty cycle.
Thermally, it is rated for TJ = –55 °C to +150 °C, with RθJL = 20 °C/W (junction-to-lead) and RθJA = 100 °C/W (junction-to-ambient, mounted on 5.0 mm × 5.0 mm copper pads). Its low incremental surge resistance ensures stable clamping under repetitive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - defines reliable avalanche initiation threshold in both directions |
| IPPM | 30.2 A - peak surge current it safely clamps at 10/1000 µs waveform without degradation |
| VC | ≤19.9 V at IPPM - clamped voltage seen by protected circuit during worst-case transient |
| PPPM | 600 W - peak pulse power dissipation capability under standardized surge test condition |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance indicating required PCB copper area for thermal management |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated, RoHS-compliant, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Functionally identical terminal; no polarity - conducts symmetrically in either direction during overvoltage |
| Terminal 2 | Anode/Cathode (bidirectional) | Functionally identical terminal; no marking required - enables placement without orientation check |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 12 V vehicle power nets and industrial control lines |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes stress on downstream ICs by tightly limiting overvoltage excursion |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
| Glass-passivated junction | Ensures long-term stability of breakdown characteristics and low leakage under humidity/stress |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤19.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor signal conditioning circuits. | Use Scenario: Safeguarding PLC digital input modules against field-wiring surges and ground-loop transients in factory automation equipment. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input channels, shunting surge energy before reaching optocoupler or MCU GPIO. Use Value: Clamps 600 W surges within nanoseconds while maintaining <1 µA leakage at 12 V - preserving signal integrity during normal operation. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs from lightning-induced surges and AC line coupling in outdoor telecom nodes. IC Role / Device Role / Timing Role: Primary-level bidirectional TVS on secondary-side DC lines feeding PHY ICs and PMICs. Use Value: Withstands repetitive 10/1000 µs transients up to 30.2 A while holding clamping voltage below IC absolute maximum ratings. | Use Scenario: Adding secondary-side surge immunity to USB-C PD adapters and wireless charging base stations exposed to user-handling ESD events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF at 0 V) TVS placed between VBUS and GND near connector to absorb contact discharge. Use Value: Provides 600 W surge rating with minimal parasitic capacitance - avoids signal distortion on high-speed power negotiation lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-E3/52 | Same VWM (12 V), but lower PPPM = 600 W (same rating), higher VC = 20.1 V at same IPPM; SMBJ package has larger footprint (DO-214AB vs DO-215AA) | Suitable where board space allows larger package and slightly higher clamping is acceptable | Select SMBJ12CA-E3/52 only if existing layout accommodates DO-214AB and thermal margin permits 0.2 V higher clamping |
| 1.5KE12CA | Same VWM/VBR range, but axial-leaded (DO-201AD), PPPM = 1500 W, VC = 20.1 V at 75 A - significantly higher surge capacity but not SMT | Used in through-hole prototyping or legacy power supply designs where manual assembly is acceptable | Choose 1.5KE12CA only for non-SMT builds requiring >600 W headroom and no automated placement constraint |
Compared with SMBG12CA-E3/52, SMBJ12CA-E3/52 offers identical power rating but less compact packaging and marginally higher clamping voltage, while 1.5KE12CA provides triple the surge power in a through-hole format - making SMBG12CA-E3/52 optimal for space-constrained, AEC-Q101-compliant SMT deployments.
Availability
SMBG12CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter ESD hardening requiring stable component supply and full traceability.
Supply support for SMBG12CA-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, efficiency, and automotive qualification.
The SMBG series is engineered specifically for high-reliability surface-mount transient suppression in automotive, industrial, and telecom applications - balancing low profile, AEC-Q101 compliance, and robust 600 W surge handling in DO-215AA.
FAQ
What is the polarity configuration of SMBG12CA-E3/52?
SMBG12CA-E3/52 is a bidirectional TVS diode with no polarity marking - both terminals are functionally identical and conduct symmetrically during overvoltage events in either direction. This eliminates orientation concerns during automated placement and simplifies PCB layout for differential or AC-coupled lines.
Is SMBG12CA-E3/52 qualified for automotive applications?
Yes, SMBG12CA-E3/52 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - confirming suitability for under-hood and chassis-mounted automotive electronics per industry reliability standards.
What is the clamping voltage of SMBG12CA-E3/52 at its rated peak pulse current?
The SMBG12CA-E3/52 clamps to a maximum of 19.9 V at its rated peak pulse current of 30.2 A (10/1000 µs waveform). This value is measured and guaranteed per Vishay's datasheet (Document Number: 88456), ensuring predictable overvoltage protection for downstream 3.3 V or 5 V logic interfaces.
Does SMBG12CA-E3/52 meet lead-free and RoHS requirements?
Yes, SMBG12CA-E3/52 carries the "E3" suffix, denoting RoHS-compliant, lead-free construction with matte tin-plated leads - fully compliant with JEDEC J-STD-020 (MSL Level 1) and qualified for Pb-free reflow soldering up to 260 °C peak temperature.
How does SMBG12CA-E3/52 differ from unidirectional variants like SMBG12A-E3/52?
SMBG12CA-E3/52 is bidirectional with symmetrical VBR and clamping in both directions, while SMBG12A-E3/52 is unidirectional - featuring a cathode band and conducting only in reverse bias. The "CA" suffix explicitly denotes bidirectional functionality, critical for AC signal or differential bus protection where polarity reversal occurs.
SMBG12CA-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):
- 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-E3/52 FAQ
1.How can I place an order for SMBG12CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12CA-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 SMBG12CA-E3/52 reliable?
The price and inventory of SMBG12CA-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 SMBG12CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12CA-E3/52?
SMBG12CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12CA-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 SMBG12CA-E3/52?
For technical support, including SMBG12CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12CA-E3/52 requirements.
6.How does Aetrix verify that SMBG12CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12CA-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 SMBG12CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12CA-E3/52?
All SMBG12CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12CA-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 SMBG12CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG12CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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