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Vishay General Semiconductor - Diodes Division SMBG12-E3/52
- Part No.:
- SMBG12-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12-E3/52.pdf
- Description:
- TVS DIODE 12VWM 22VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,301
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Product details
Overview
SMBG12-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping inductive switching transients and ESD events on power 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 maximum clamping voltage (VC) at 30.2 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBG12-E3/52 datasheet, SMBG12-E3/52 pinout, SMBG12-E3/52 application, or SMBG12-E3/52 equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC-DC converter input stages where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (≤5 µA leakage at 12 V), then avalanches sharply at VBR to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Thermal design relies on its 20 °C/W junction-to-lead thermal resistance and 100 °C/W junction-to-ambient rating; derating begins above 25 °C ambient per Fig. 2. The device meets MSL Level 1 (260 °C reflow peak) and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 19.9 V at 30.2 A - Clamping voltage during 600 W 10/1000 µs surge; limits stress on protected circuit |
| PPPM | 600 W - Peak pulse power handling capability defines transient energy absorption capacity |
| TJ max. | +150 °C - Maximum junction temperature supports operation in under-hood automotive environments |
| IFSM | 100 A - Non-repetitive forward surge rating for accidental polarity reversal events |
| Leakage ID | ≤5 µA at 12 V - Low standby current preserves battery life in always-on systems |
Pinout & Package
DO-215AA (SMBG) surface-mount package: gull-wing leads, 0.235–0.255 inch body length, cathode band marking on one end. Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per datasheet Fig. 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to protected line's low-side or ground reference; forms current loop during clamping |
| Cathode | Reverse-biased terminal / clamping node | Marked with band; connected to protected line's high-side (e.g., 12 V rail); avalanche occurs here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 600 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge waveforms |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and lifetime |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during surge, reducing risk of downstream IC latch-up or damage |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control modules against load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt clamping device placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤19.9 V, preventing damage to 24 V-tolerant regulators and ensuring system reset integrity. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable protection (though SMBG12-E3/52 is unidirectional, used with series resistor for bidirectional effect) on signal outputs exposed to cable ESD. Use Value: Sub-20 V clamping prevents op-amp saturation and ADC input damage during ±8 kV contact ESD per IEC 61000-4-2. |
| DC-DC Converter Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Input stage protection for isolated 12 V → 3.3 V buck converters powering FPGAs in base station radios. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input filter capacitor and controller IC. Use Value: 30.2 A IPPM rating handles repetitive surges from nearby relay switching without degradation. |
Use Scenario: Secondary-level surge protection on -48 V telecom power feeds entering line cards. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, absorbing positive-going transients on negative rails. Use Value: 150 °C TJ max enables reliable operation in sealed, convection-limited telecom enclosures. |
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 DO-214AA (SMB) package; identical VWM/VBR/VC specs but lower RθJA (85 °C/W vs. 100 °C/W) | Higher power density allows tighter thermal layout; preferred for space-constrained PCBs | Select SMBJ12A-E3/52 when board area is limited and thermal pad area cannot meet SMBG's 5.0 mm × 5.0 mm requirement |
| SMBG12HE3/52 | Identical electrical specs and package; AEC-Q101 qualified (SMBG12-E3/52 is commercial grade only) | Required for automotive OEM designs requiring full component qualification documentation | Choose SMBG12HE3/52 for production automotive programs; SMBG12-E3/52 suffices for industrial prototyping |
Compared with SMBJ12A-E3/52, SMBG12-E3/52 offers larger thermal pad area for improved heat dissipation but requires more PCB real estate; versus SMBG12HE3/52, it lacks formal AEC-Q101 certification documentation though shares identical silicon and construction.
Availability
SMBG12-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC-DC converter input surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMBG12-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 and automotive-grade qualification.
The SMBG series was developed for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 600 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMBG12-E3/52 at its rated peak pulse current?
The SMBG12-E3/52 has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 30.2 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and ensures predictable overvoltage limiting for protected circuits. The SMBG12-E3/52 achieves this with low incremental surge resistance due to its glass-passivated junction structure.
Is SMBG12-E3/52 suitable for automotive applications?
SMBG12-E3/52 is RoHS-compliant and manufactured in an AEC-Q101-qualified process flow, but the part number suffix "E3" denotes commercial-grade qualification-not full AEC-Q101 certified documentation. For production automotive use, Vishay specifies SMBG12HE3/52 as the AEC-Q101-qualified variant. The SMBG12-E3/52 remains appropriate for automotive prototyping, aftermarket modules, and non-safety-critical subsystems where full qualification is not mandated.
What is the thermal resistance of SMBG12-E3/52, and how does it affect layout?
The SMBG12-E3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain safe junction temperatures under repetitive surges, PCB layout must provide minimum pad dimensions per datasheet Fig. 4. Reducing pad area increases RθJA and risks thermal runaway during sustained transient events. The SMBG12-E3/52 thermal performance is optimized for manual or automated placement on standard FR-4 boards with adequate copper pour.
How does SMBG12-E3/52 differ from bi-directional TVS diodes like SMBG12CA?
SMBG12-E3/52 is unidirectional and functions only against positive transients on its cathode terminal, requiring correct polarity installation. In contrast, SMBG12CA is bi-directional with symmetrical breakdown in both directions and no polarity marking. The SMBG12-E3/52 offers lower leakage (<5 µA at 12 V) and slightly tighter VBR tolerance than its bi-directional counterpart, making it preferable for DC power rail protection where polarity is fixed and leakage sensitivity is critical.
What packaging format is supplied for SMBG12-E3/52?
SMBG12-E3/52 is supplied in 7-inch plastic tape-and-reel packaging with a base quantity of 750 units per reel (package code "52"). This format supports high-speed automated pick-and-place assembly and complies with EIA-481-D standards. The tape features embossed pockets, cover tape with heat-seal adhesive, and leader/trailer sections meeting industry requirements for SMT manufacturing. Traceability data including lot code and date code is printed on the reel label per Vishay's quality protocol.
SMBG12-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 27.3A
- 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)
SMBG12-E3/52 FAQ
1.How can I place an order for SMBG12-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12-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 SMBG12-E3/52 reliable?
The price and inventory of SMBG12-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 SMBG12-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG12-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12-E3/52?
SMBG12-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12-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 SMBG12-E3/52?
For technical support, including SMBG12-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12-E3/52 requirements.
6.How does Aetrix verify that SMBG12-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG12-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 SMBG12-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG12-E3/52?
All SMBG12-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12-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 SMBG12-E3/52 part is unused and in its original packaging.
Return procedure for SMBG12-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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