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Vishay General Semiconductor - Diodes Division SMBG12A-E3/5B
- Part No.:
- SMBG12A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12A-E3/5B.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,696
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Product details
Overview
SMBG12A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, featuring 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 - deployed for overvoltage protection of MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMBG12A-E3/5B datasheet, SMBG12A-E3/5B pinout, SMBG12A-E3/5B application, or SMBG12A-E3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a clamping-type TVS diode, triggered when reverse voltage exceeds its breakdown threshold (13.3–14.7 V), diverting transient energy to ground while limiting downstream voltage to ≤19.9 V at 30.2 A. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns).
Designed for single-polarity transients, SMBG12A-E3/5B exhibits 5.0 µA max reverse leakage at 12 V, supports 100 A non-repetitive forward surge (8.3 ms half-sine), and maintains thermal resistance of 100 °C/W (junction-to-ambient) under standard PCB mounting conditions.
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 - Confirmed breakdown range ensuring reliable turn-on margin above VWM |
| VC @ IPPM | 19.9 V at 30.2 A - Clamped voltage during 600 W transient, limiting stress on protected circuitry |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform, validated at 0.01% duty cycle |
| IFSM | 100 A - Surge current rating for 8.3 ms half-sine wave, supporting inductive load switching events |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Leakage @ VWM | 5.0 µA - Low reverse leakage preserves signal integrity in high-impedance sensor interfaces |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leadform, matte tin-plated terminals, RoHS-compliant (E3 suffix), MSL Level 1 (260 °C reflow peak), 0.096 g unit weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to ground or low-impedance return path; conducts during overvoltage events |
| Anode | Protected line connection | Connected to I/O line or power rail requiring clamping; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability across life cycle |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events without degradation |
| Low profile SMBG package | 0.255" × 0.155" footprint enables dense layout in space-constrained ECUs and motor controllers |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns or bake requirements |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤19.9 V during 30.2 A surges, preventing damage to downstream regulators rated for 24 V absolute max. | Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Reverse-biased protection element on 4–20 mA current loop outputs exposed to field wiring ESD. Use Value: Sub-20 V clamping prevents latch-up in op-amps and ADC front-ends while maintaining <5 µA leakage at 12 V nominal. |
| Motor Drive Gate Protection | Automotive CAN Transceiver Protection |
Use Scenario: Shielding high-side MOSFET gate drivers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Clamp diode connected between gate and source, absorbing negative-going spikes exceeding VGS rating. Use Value: 13.3–14.7 V VBR aligns with typical 12 V gate drive rails, enabling fast turn-on before gate oxide overstress occurs. | Use Scenario: Adding secondary protection to CAN_H/CAN_L lines in automotive gateway ECUs per ISO 11898-2. IC Role / Device Role / Timing Role: Unidirectional TVS on each CAN line referenced to ground, supplementing integrated transceiver ESD structures. Use Value: AEC-Q101 qualification and 150 °C TJ max ensure compliance with automotive ambient requirements while clamping to <20 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/5B | Same SMB package, identical VWM/VBR/VC, but lower 400 W PPPM rating | Not suitable for 600 W surge events such as ISO 7637-2 Pulse 5a; limited to lighter-duty transients | Select SMBG12A-E3/5B where full 600 W capability and AEC-Q101 qualification are required |
| SMCJ12A-E3/57T | Larger SMC (DO-214AB) package, same electrical specs, higher 1500 W PPPM, 1.5× footprint area | Acceptable where board space allows and higher surge margin is needed; not drop-in due to pad layout change | Choose SMBG12A-E3/5B when space-constrained layouts demand SMBG's smaller 0.255" × 0.155" outline |
Compared with SMBJ12A-E3/5B and SMCJ12A-E3/57T, SMBG12A-E3/5B uniquely balances 600 W surge capability, AEC-Q101 qualification, and compact SMBG footprint - making it optimal for automotive and industrial modules where both reliability and density are critical.
Availability
SMBG12A-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, motor drive gate protection, and automotive CAN transceiver protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBG12A-E3/5B 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on automotive, industrial, and computing applications.
The SMBG series was engineered specifically for high-reliability transient suppression in space-constrained, thermally demanding environments - targeting automotive ECUs, industrial drives, and sensor signal conditioning circuits.
FAQ
What is the clamping voltage of SMBG12A-E3/5B at its rated peak pulse current?
The SMBG12A-E3/5B has a maximum clamping voltage (VC) of 19.9 V at its specified peak pulse current (IPPM) of 30.2 A, measured using the standard 10/1000 µs waveform. This value ensures protected circuits remain within safe voltage limits during surge events, and is confirmed in Vishay's official datasheet revision 09-Jan-2024, page 2.
Is SMBG12A-E3/5B suitable for automotive applications?
Yes, SMBG12A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments up to +150 °C junction temperature. Its construction - glass-passivated junction, MSL Level 1 reflow compatibility, and 600 W surge capability - meets ISO 7637-2 and ISO 16750-2 requirements, making SMBG12A-E3/5B appropriate for body control modules and gateway ECUs.
What does the "E3/5B" suffix indicate in SMBG12A-E3/5B?
The "E3" denotes RoHS-compliant, industrial-grade matte tin plating per J-STD-002, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This differs from "52" (7-inch reel, 750 units). The full part number SMBG12A-E3/5B thus identifies both environmental compliance and logistics configuration.
How does SMBG12A-E3/5B differ from bidirectional TVS diodes like SMBG12CA?
SMBG12A-E3/5B is unidirectional and features a cathode band for polarity identification, whereas SMBG12CA is bidirectional with no marking and symmetrical clamping in both directions. SMBG12A-E3/5B offers lower leakage (5.0 µA vs. up to 10 µA for CA types at same VWM) and is intended for DC-biased lines; SMBG12CA suits AC-coupled or differential signal paths.
What is the thermal resistance of SMBG12A-E3/5B under standard mounting conditions?
The SMBG12A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay's datasheet page 3. This value assumes standard FR-4 PCB with minimal copper pour; actual RθJA improves with enhanced thermal land design.
SMBG12A-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBG12A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12A-E3/5B 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-E3/5B reliable?
The price and inventory of SMBG12A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG12A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12A-E3/5B?
SMBG12A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12A-E3/5B 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-E3/5B?
For technical support, including SMBG12A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12A-E3/5B requirements.
6.How does Aetrix verify that SMBG12A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG12A-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG12A-E3/5B?
All SMBG12A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12A-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBG12A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12A-E3/5B Tags
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