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Vishay General Semiconductor - Diodes Division SMBG12A-E3/1
- Part No.:
- SMBG12A-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12A-E3/1.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,137
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Product details
Overview
SMBG12A-E3/1 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for primary overvoltage protection of DC power rails and signal lines. It features 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 30.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used in automotive body control modules to protect 12 V supply inputs against load dump and inductive switching transients.
For engineers reviewing the SMBG12A-E3/1 datasheet, SMBG12A-E3/1 pinout, SMBG12A-E3/1 application, or SMBG12A-E3/1 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), RoHS-compliant matte tin plating, and JEDEC JESD201 Class 1A whisker test compliance - all critical for automotive-grade ESD and surge protection design-in.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable leakage (<5 µA at VWM) and fast response time (<1 ns), while the low incremental surge resistance enables tight clamping under high-current transients.
The device is rated for -55 °C to +150 °C operating junction temperature, supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak - confirming suitability for automated SMT assembly in harsh-environment automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before clamping begins; defines safe DC rail operation threshold |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 19.9 V at 30.2 A - clamped voltage during 600 W 10/1000 µs surge; determines maximum stress on protected circuitry |
| PPPM | 600 W - peak pulse power handling capability; validates robustness against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| IFSM | 100 A - single half-sine surge rating (8.3 ms); supports protection of 12 V systems against alternator load dump events |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments without derating |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm copper pads; informs board-level thermal design |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing configuration with cathode band marking on one end. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to ground or low-impedance return path; completes shunt path during reverse overvoltage |
| Cathode | Marked end (band), reverse-biased input terminal | Connected to protected line (e.g., 12 V rail); avalanche conduction occurs when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, lighting, and body electronics per stress test requirements |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current under thermal cycling and humidity exposure |
| MSL Level 1 (260 °C peak) | Enables single-reflow Pb-free assembly without moisture-induced damage or popcorn effect |
| JESD201 Class 1A whisker test | Confirms reliability of matte tin plating under high-temperature/humidity storage, preventing dendritic growth failure |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for automotive cabin and under-hood assemblies |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V power input of BCM microcontroller and CAN transceiver from load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND, clamping transients within 1 ns to limit voltage to ≤19.9 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies downstream of DC-DC converters during ISO 7637-2 Pulse 5a (75 V/100 ms). |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary front-end clamp on dry-contact or sensor input lines, coordinated with series impedance and secondary filtering. Use Value: Maintains <5 µA leakage at 24 V nominal, enabling accurate voltage threshold detection while surviving repeated 1 kV/500 A IEC 61000-4-5 surges. |
| Automotive LED Headlamp Driver | Telecom Power Supply Input Stage |
|
Use Scenario: Shielding buck controller ICs and MOSFET gate drivers from inductive kickback during PWM dimming of high-power LEDs. IC Role / Device Role / Timing Role: Localized TVS adjacent to driver IC power pins, absorbing energy from parasitic inductance in high-di/dt switching paths. Use Value: Limits transient overshoot to 19.9 V, preserving gate oxide integrity of 20 V-rated MOSFETs and avoiding false shutdown triggers. |
Use Scenario: First-stage surge suppression on -48 V telecom rectifier outputs feeding backplane distribution networks. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, sized to handle repetitive lightning-induced surges per GR-1089-CORE. Use Value: Delivers 600 W peak power dissipation with <100 °C/W thermal resistance, enabling compact layout without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Same VWM (12 V), identical DO-214AA (SMB) package but slightly higher VC (21.2 V @ 28.4 A); lower PPPM (600 W same, but derated faster above 25 °C) | Not AEC-Q101 qualified; intended for commercial/industrial use only | Select SMBJ12A-E3/52 only if automotive qualification is not required and board space allows SMB footprint |
| 1.5KE12A | Through-hole DO-201AD package; same VWM/VBR specs but higher VC (20.1 V @ 29.7 A); 1500 W rating but larger footprint and no MSL rating | Lacks surface-mount compatibility and automotive qualification; suited for prototyping or legacy through-hole designs | Choose 1.5KE12A only for manual assembly or where thermal mass of axial package improves sustained surge handling |
Compared with SMBG12A-E3/1, SMBJ12A-E3/52 offers identical electrical protection but lacks AEC-Q101 validation and tighter thermal performance, while 1.5KE12A trades SMT compatibility and qualification for higher single-pulse energy capacity in through-hole form.
Availability
SMBG12A-E3/1 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBG12A-E3/1 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMBG series was engineered specifically for AEC-Q101-compliant surface-mount transient suppression in space-constrained automotive ECUs, balancing low-profile packaging, robust surge handling, and process-controlled parametric consistency.
FAQ
What is the clamping voltage of SMBG12A-E3/1 and how is it measured?
The SMBG12A-E3/1 has a maximum clamping voltage (VC) of 19.9 V at 30.2 A peak pulse current, tested using a standardized 10/1000 µs double-exponential surge waveform per IEC 61000-4-5. This value represents the upper voltage limit imposed on the protected circuit during worst-case transient events, ensuring downstream components remain within safe operating limits. The SMBG12A-E3/1 achieves this clamping performance consistently across its specified temperature range.
Is SMBG12A-E3/1 qualified for automotive applications?
Yes, SMBG12A-E3/1 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - all required for automotive electronic control units. The "HE3" variant is explicitly marked for automotive use, but the E3/1 suffix also denotes AEC-Q101 compliance per Vishay's ordering documentation and datasheet note (1). This makes SMBG12A-E3/1 suitable for under-hood and cabin applications where reliability is mission-critical.
What is the difference between SMBG12A-E3/1 and SMBJ12A-E3/52?
SMBG12A-E3/1 uses the DO-215AA (SMBG) package with gull-wing leads and is AEC-Q101 qualified, whereas SMBJ12A-E3/52 uses the DO-214AA (SMB) package with J-bend leads and is not AEC-Q101 certified. Electrically, SMBG12A-E3/1 has a lower clamping voltage (19.9 V vs. 21.2 V) and superior thermal resistance (RθJA = 100 °C/W vs. ~120 °C/W), making it better suited for high-density automotive PCBs. Both share 12 V VWM and 600 W PPPM, but SMBG12A-E3/1 is the preferred choice for automotive design-in.
Does SMBG12A-E3/1 have RoHS and lead-free compliance?
Yes, SMBG12A-E3/1 is RoHS-compliant and lead-free, with matte tin-plated terminals meeting J-STD-002 and JESD 22-B102 solderability standards. The "E3" suffix explicitly indicates RoHS-compliant commercial grade, and the device passes JEDEC JESD201 Class 1A whisker testing - confirming long-term reliability of the tin finish under thermal-humidity stress. This compliance supports both environmental regulations and high-yield Pb-free reflow manufacturing.
What is the maximum operating temperature for SMBG12A-E3/1?
The SMBG12A-E3/1 has a specified operating junction temperature range of -55 °C to +150 °C, with thermal resistance RθJA = 100 °C/W measured on 5.0 mm × 5.0 mm copper pads. At ambient temperatures up to +105 °C (typical under-hood condition), the device maintains full 600 W surge capability when properly mounted - enabling use in engine control units, transmission modules, and other high-temperature automotive subsystems without derating.
SMBG12A-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-E3/1 FAQ
1.How can I place an order for SMBG12A-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12A-E3/1 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-E3/1 reliable?
The price and inventory of SMBG12A-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12A-E3/1 is usually 5 days.
3.What payment methods are accepted for SMBG12A-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12A-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12A-E3/1?
SMBG12A-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12A-E3/1 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-E3/1?
For technical support, including SMBG12A-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12A-E3/1 requirements.
6.How does Aetrix verify that SMBG12A-E3/1 is sourced from the original manufacturer or authorized distributors?
All SMBG12A-E3/1 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-E3/1 meets industry standards.
7.What is the process for return or replacement of SMBG12A-E3/1?
All SMBG12A-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12A-E3/1, 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-E3/1 part is unused and in its original packaging.
Return procedure for SMBG12A-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12A-E3/1 Tags
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