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Vishay General Semiconductor - Diodes Division SMBG12A-E3/52
- Part No.:
- SMBG12A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12A-E3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,684
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Product details
Overview
SMBG12A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V maximum clamping voltage (VC) at 30.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and DC power rail protection.
For engineers reviewing the SMBG12A-E3/52 datasheet, SMBG12A-E3/52 pinout, SMBG12A-E3/52 application, or SMBG12A-E3/52 equivalent, key selection criteria include clamping performance under 30.2 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, and DO-215AA (SMBG) package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable leakage (<5 µA at 12 V) and long-term reliability under repetitive transients.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads. It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak.
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 avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | 19.9 V at 30.2 A - Clamped voltage during 600 W transient; protects 15–20 V-rated components like logic-level MOSFETs or CAN transceivers. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1/2b/5a automotive transients. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports high-energy load dump events in vehicle power networks. |
| Junction Temp | -55 °C to +150 °C - Enables deployment in engine bay, motor control, and industrial ambient environments without derating. |
Pinout & Package
Package: SMBG (DO-215AA) - low-profile surface-mount case with matte tin-plated leads, UL 94 V-0 molding compound, and AEC-Q101 qualification. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Anode-side connection point for unidirectional operation | Connected to protected line; clamps positive transients to ground when referenced to anode terminal. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test requirements. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 16750-2 load dump spikes without degradation across 1000+ cycles. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping - critical for protecting 16 V absolute-maximum-rated microcontrollers and gate drivers. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard lead-free reflow profiles up to 260 °C peak. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<5 µA) over 15-year field life in harsh industrial environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power input and ground, responding within <1 ns to clamp surges above 13.3 V. Use Value: Limits voltage seen by downstream PMICs and MCUs to ≤19.9 V during 30.2 A transients, preventing latch-up or oxide damage. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS on signal line with cathode to signal and anode to ground, clamping positive ESD events. Use Value: Maintains signal integrity below 20 V during ±8 kV contact ESD (IEC 61000-4-2), avoiding ADC saturation or op-amp input stage damage. |
| DC Motor Drive Board Protection | Telecom Power Supply Input Stage |
Use Scenario: Suppressing flyback voltage spikes generated by brushed DC motors in factory automation actuators. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge supply rails to clamp inductive kickback in both directions via external bidirectional pairing or discrete unidirectional placement. Use Value: Absorbs 600 W pulses without failure, enabling use with 24 V/10 A motor drives while maintaining >100 k-cycle lifetime. |
Use Scenario: Front-end protection for 12 V telecom power supplies subject to lightning-induced surges on AC/DC input or PoE-derived DC feeds. IC Role / Device Role / Timing Role: First-stage clamping device on primary DC bus, coordinated with MOVs and fuses to meet ITU-T K.20 and GR-1089-CORE requirements. Use Value: Provides precise 19.9 V clamping threshold with fast response, reducing stress on downstream DC-DC converters and improving system-level surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Same VWM (12 V), but lower PPPM = 600 W (identical), higher VC = 20.1 V at 29.3 A; SMB (DO-214AA) package - 0.2 mm taller, 0.3 mm wider than SMBG. | Compatible in non-space-constrained designs; less suitable for ultra-thin automotive modules where SMBG's lower profile (2.10 mm height) is required. | Select SMBG12A-E3/52 when board height is limited to ≤2.15 mm or AEC-Q101 compliance is mandatory (SMBJ12A-E3/52 is not AEC-Q101 qualified). |
| 1.5SMC12A | Same electrical specs (VWM = 12 V, VC = 19.9 V), but larger SMC (DO-214AB) package - 7.11 mm × 6.22 mm footprint, 2.34 mm height; no AEC-Q101 qualification. | Used in legacy industrial power supplies where PCB real estate permits larger footprints and automotive qualification is unnecessary. | Choose SMBG12A-E3/52 for new automotive or space-constrained industrial designs requiring AEC-Q101 and DO-215AA's compact 4.57 mm × 3.94 mm layout. |
Compared with SMBJ12A-E3/52 and 1.5SMC12A, SMBG12A-E3/52 delivers identical clamping performance in a smaller, automotive-qualified package - enabling higher component density and certified reliability in next-generation ECU and ADAS power domains.
Availability
SMBG12A-E3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and DC motor drive boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG12A-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 high-reliability, high-efficiency solutions.
The SMBG series was engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, low-profile packaging, and repeatable transient suppression performance under extreme thermal and mechanical stress.
FAQ
What is the clamping voltage of SMBG12A-E3/52 at its rated peak pulse current?
The SMBG12A-E3/52 has a maximum clamping voltage (VC) of 19.9 V at 30.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 20 V-tolerant components. The SMBG12A-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBG12A-E3/52 suitable for automotive applications?
Yes, SMBG12A-E3/52 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS power domains. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and reflow compatibility up to 260 °C - all validated per automotive stress test standards. The SMBG12A-E3/52 datasheet confirms qualification status in the Mechanical Data section.
What is the package type and mounting configuration of SMBG12A-E3/52?
SMBG12A-E3/52 uses the SMBG (DO-215AA) surface-mount package: dimensions 4.57 mm × 3.94 mm × 2.10 mm, with matte tin-plated gull-wing leads. It mounts with cathode identified by a band on the top surface, and requires 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal and surge performance. The SMBG12A-E3/52 is compatible with standard pick-and-place and lead-free reflow processes.
How does SMBG12A-E3/52 differ from bidirectional TVS diodes like SMBG12CA?
SMBG12A-E3/52 is unidirectional and functions only for positive transients relative to ground (cathode to line, anode to ground), whereas SMBG12CA clamps in both polarities. The SMBG12A-E3/52 exhibits lower leakage (<5 µA at 12 V) and supports forward surge current (IFSM = 100 A), making it ideal for DC power rail protection. SMBG12CA is used where AC-coupled or differential signal lines require symmetrical clamping - the SMBG12A-E3/52 is not interchangeable with SMBG12CA without circuit redesign.
What is the maximum operating temperature and thermal resistance of SMBG12A-E3/52?
The SMBG12A-E3/52 has a maximum junction temperature (TJ) of +150 °C and a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads. This allows sustained operation in under-hood automotive environments and industrial enclosures without active cooling. Derating curves in the SMBG12A-E3/52 datasheet show usable power capability down to 50% at 125 °C ambient.
SMBG12A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBG12A-E3/52 FAQ
1.How can I place an order for SMBG12A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12A-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 SMBG12A-E3/52 reliable?
The price and inventory of SMBG12A-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 SMBG12A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12A-E3/52?
SMBG12A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12A-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 SMBG12A-E3/52?
For technical support, including SMBG12A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12A-E3/52 requirements.
6.How does Aetrix verify that SMBG12A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12A-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 SMBG12A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12A-E3/52?
All SMBG12A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12A-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 SMBG12A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG12A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12A-E3/52 Tags
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