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Vishay General Semiconductor - Diodes Division SMBG12CA-M3/52
- Part No.:
- SMBG12CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12CA-M3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,624
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Product details
Overview
SMBG12CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. 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), <1.0 µA reverse leakage at VWM, and clamps to ≤19.9 V at 30.2 A peak pulse current - used for ESD and surge protection in automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMBG12CA-M3/52 datasheet, SMBG12CA-M3/52 pinout, SMBG12CA-M3/52 application, or SMBG12CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR min/max (13.3–14.7 V) and clamping behavior (VC ≤ 19.9 V at IPPM = 30.2 A). Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance under repetitive 10/1000 µs transients at 0.01% duty cycle.
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C. The device meets MSL Level 1 (260 °C peak reflow) and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
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 1 mA - guaranteed avalanche initiation range for reliable transient detection |
| IPPM | 30.2 A (10/1000 µs) - peak surge current it safely shunts without failure |
| VC | ≤19.9 V at IPPM - clamped voltage protecting downstream ICs rated ≤20 V |
| PPPM | 600 W - peak pulse power handling capacity under standard surge waveform |
| ID @ VWM | <1.0 µA - negligible leakage current preserving signal integrity in high-impedance lines |
| TJ max | +150 °C - enables use in under-hood automotive environments and industrial enclosures |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads; no polarity marking (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche terminals | No cathode band; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage stress on protected ICs - critical for 12 V rail and CAN/LIN transceivers |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking or special handling |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and electrical stress |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller input or transceiver. Use Value: Limits transient voltage to ≤19.9 V, preventing latch-up or gate oxide damage in 12 V–system MCUs and analog front-ends. | Use Scenario: Safeguarding PLC digital input channels exposed to inductive switching noise from solenoids or relays. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to divert surge energy before reaching optocoupler or level-shifter. Use Value: Withstands 30.2 A surge peaks while maintaining sub-µA leakage - preserves signal fidelity during normal operation. |
| Telecom Line Interface | Consumer USB/UART Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Differential-mode TVS across A/B lines, leveraging symmetrical clamping to suppress common- and differential-mode transients. Use Value: 600 W rating and fast response (<1 ns) ensure robust immunity to IEC 61000-4-5 combination wave surges up to 4 kV. | Use Scenario: Adding secondary-level surge protection to USB 2.0 or UART debug ports in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Low-capacitance (typ. 200 pF at 0 V) bidirectional clamp placed after primary ESD diode array. Use Value: Clamps transients to safe levels without distorting 480 Mbps USB signals or 3 Mbps UART timing due to minimal parasitic loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-M3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 32.5 A; SMB (DO-214AA) package - 0.5 mm taller, same footprint width | SMBJ series has slightly higher thermal resistance (RθJA = 110 °C/W vs. 100 °C/W); less optimal for high-density layouts requiring minimal Z-height | Select SMBJ12CA-M3/52 only if existing PCB uses SMB footprint and height margin allows; otherwise SMBG offers better thermal performance in constrained spaces. |
| 1.5KE12CA | Through-hole TO-218 package; same VWM/VBR, but higher PPPM = 1500 W and larger VC = 20.1 V at 75 A; not surface-mountable | Designed for board-edge or chassis-level protection; incompatible with automated SMT assembly and dense PCB layouts | Choose 1.5KE12CA only for legacy through-hole designs or where higher surge margin justifies manual assembly and larger board area. |
Compared with SMBJ12CA-M3/52 and 1.5KE12CA, SMBG12CA-M3/52 delivers optimal balance of SMT compatibility, AEC-Q101 qualification, low-profile packaging, and verified 600 W surge handling - making it preferred for new automotive and industrial PCB designs requiring automated manufacturing and space efficiency.
Availability
SMBG12CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer USB port hardening requiring stable component supply and full traceability.
Supply support for SMBG12CA-M3/52 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 application-specific optimization.
The SMBG series was developed for high-reliability surface-mount transient suppression in automotive and industrial environments, prioritizing AEC-Q101 compliance, low-profile packaging, and consistent clamping performance across temperature and life cycle.
FAQ
What does the "CA" suffix indicate in SMBG12CA-M3/52?
The "CA" suffix denotes a bidirectional configuration - meaning SMBG12CA-M3/52 provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity. This eliminates the need for polarity-aware layout and makes it ideal for AC-coupled or differential signal lines where transient direction is unpredictable.
Is SMBG12CA-M3/52 suitable for automotive applications?
Yes, SMBG12CA-M3/52 is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C, meeting requirements for under-hood and chassis-mounted electronics. Its halogen-free (M3) construction, MSL Level 1 reflow compatibility, and validated surge performance make SMBG12CA-M3/52 appropriate for automotive sensor interfaces, body control modules, and infotainment system I/O protection.
How does SMBG12CA-M3/52 differ from unidirectional variants like SMBG12A-M3/52?
SMBG12CA-M3/52 is bidirectional with no polarity marking and symmetrical VBR/VC in both directions, whereas SMBG12A-M3/52 is unidirectional with a cathode band and only clamps positive transients relative to its marked cathode. SMBG12CA-M3/52 supports AC, differential, or floating-line protection; SMBG12A-M3/52 is limited to DC rail or single-polarity signal protection.
What is the maximum clamping voltage of SMBG12CA-M3/52 under surge conditions?
The maximum clamping voltage (VC) of SMBG12CA-M3/52 is 19.9 V at its rated peak pulse current of 30.2 A (10/1000 µs waveform). This value is guaranteed across temperature and lifetime, ensuring downstream 20 V-rated ICs remain within safe operating limits during standardized surge events.
Can SMBG12CA-M3/52 be used in place of older SMAJ12CA devices?
SMBG12CA-M3/52 is not a direct drop-in replacement for SMAJ12CA due to different package dimensions (SMBG/DO-215AA vs. SMA/DO-214AC) and thermal characteristics (RθJA = 100 °C/W vs. 125 °C/W). While electrical specs align closely, PCB land patterns and thermal pad design must be updated; verify mechanical fit and thermal derating per application before substitution.
SMBG12CA-M3/52 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG12CA-M3/52 FAQ
1.How can I place an order for SMBG12CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12CA-M3/52 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-M3/52 reliable?
The price and inventory of SMBG12CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12CA-M3/52?
SMBG12CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12CA-M3/52 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-M3/52?
For technical support, including SMBG12CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12CA-M3/52 requirements.
6.How does Aetrix verify that SMBG12CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12CA-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12CA-M3/52?
All SMBG12CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12CA-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for SMBG12CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12CA-M3/52 Tags
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