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Vishay General Semiconductor - Diodes Division SMBG12C-E3/5B
- Part No.:
- SMBG12C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12C-E3/5B.pdf
- Description:
- TVS DIODE 12VWM 22VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,272
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Product details
Overview
SMBG12C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping voltage transients on signal or power lines. It features 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), and clamps to ≤19.9 V at 30.2 A peak surge current - used in automotive sensor interface protection.
For engineers reviewing the SMBG12C-E3/5B datasheet, SMBG12C-E3/5B pinout, SMBG12C-E3/5B application, or SMBG12C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with identical VBR min/max (13.3 V / 14.7 V) and VC (≤19.9 V) under 10/1000 μs surge. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and fast response time (<1 ns), critical for protecting sensitive analog inputs and CAN/LIN bus nodes.
The device meets AEC-Q101 stress requirements for automotive environments and is rated for -55 °C to +150 °C operation. Thermal resistance is RθJA = 100 °C/W (on 5.0 mm × 5.0 mm pads), enabling reliable power dissipation during repetitive transients up to 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (Breakdown Voltage) | 13.3–14.7 V at 1 mA - guaranteed conduction onset range for transient suppression |
| VC (Clamping Voltage) | ≤19.9 V at IPPM = 30.2 A - limits downstream voltage stress during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 600 W - sustains single 10/1000 μs transient without failure |
| ID (Reverse Leakage) | ≤1 μA at 12 V - negligible DC loading on protected signal lines |
| TJ max | +150 °C - supports under-hood automotive deployment with thermal margin |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for standard reflow profiles |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing, RoHS-compliant matte tin-plated leads. Bi-directional construction has no polarity marking; terminals are symmetrical anode/cathode pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Bi-directional surge path | Identical terminal function - either end accepts positive or negative transient energy |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Handles high-energy load dump or ESD events without degradation |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime and temperature extremes |
| MSL Level 1 rating | Eliminates bake-out requirement and enables direct placement into high-volume SMT lines |
| Low profile DO-215AA package | 0.235–0.255 inch length fits compact PCB layouts while maintaining thermal pad area |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from battery load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point before signal conditioning circuitry. Use Value: Limits transient voltage to ≤19.9 V, preventing damage to 5 V or 12 V rail-tied receivers while maintaining signal integrity. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and ground loop transients. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on dry-contact or 24 V DC input channels. Use Value: Absorbs 600 W surges without latch-up, preserving input logic thresholds and enabling >100 kV ESD immunity per IEC 61000-4-2. |
| Telecom Line Interface | Consumer Power Adapter Feedback Loop |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller pins from lightning-induced surges on unshielded twisted pair. IC Role / Device Role / Timing Role: Secondary-level protection after gas discharge tube (GDT), clamping residual overshoot. Use Value: Fast <1 ns response captures high-frequency ring components missed by slower primary protectors. |
Use Scenario: Securing optocoupler feedback path in isolated AC/DC adapters against transformer-coupled transients. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) bi-directional clamp across secondary-side error amplifier inputs. Use Value: Prevents false regulation tripping during line surges while adding <0.5 pF parasitic capacitance to control loop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Same VWM (12 V), higher PPPM (600 W), but larger DO-214AA (SMB) package (0.295" x 0.230") | Less board space efficiency; requires larger pad layout and higher RθJA (~120 °C/W) | Select when legacy SMB footprint compatibility is required and thermal margin is less constrained |
| 1.5KE12CA | Same VWM (12 V), higher PPPM (1500 W), but axial DO-201 package - not SMT-compatible | Requires through-hole assembly; unsuitable for automated high-density PCB production | Select only for prototyping or low-volume repair where manual soldering is acceptable |
Compared with SMBJ12CA and 1.5KE12CA, SMBG12C-E3/5B delivers identical electrical protection in a smaller, AEC-Q101-qualified SMT package optimized for automotive and industrial volume production - offering superior thermal performance per unit area and full reflow compatibility without derating.
Availability
SMBG12C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter feedback circuits requiring stable component supply and long-term lifecycle support.
Supply support for SMBG12C-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 leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and MOSFETs for high-reliability applications.
The SMBG series was engineered specifically for AEC-Q101-compliant, surface-mount transient suppression in space-constrained automotive and industrial systems - emphasizing robustness, repeatability, and SMT process compatibility.
FAQ
What is the clamping voltage of SMBG12C-E3/5B at its rated peak pulse current?
The SMBG12C-E3/5B clamps to a maximum of 19.9 V when subjected to its peak pulse current of 30.2 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees protection of downstream 12 V-rated ICs without exceeding safe voltage thresholds. The SMBG12C-E3/5B achieves this with low incremental surge resistance, ensuring consistent clamping across production lots.
Is SMBG12C-E3/5B suitable for automotive applications?
Yes, SMBG12C-E3/5B is AEC-Q101 qualified and rated for operation from -55 °C to +150 °C, making it suitable for under-hood and cabin automotive applications. Its bi-directional architecture protects against both positive and negative transients common in LIN, CAN, and sensor interfaces. The SMBG12C-E3/5B also meets MSL Level 1, supporting standard lead-free reflow without preconditioning.
How does the DO-215AA (SMBG) package of SMBG12C-E3/5B compare to DO-214AA (SMB)?
The DO-215AA (SMBG) package of SMBG12C-E3/5B is dimensionally smaller than DO-214AA (SMB), with a length of 0.235–0.255 inch versus 0.295 inch, enabling tighter PCB layouts. It maintains equivalent 600 W surge capability but offers lower thermal resistance (RθJA = 100 °C/W vs. ~120 °C/W for SMB) due to optimized leadframe design. The SMBG12C-E3/5B uses gull-wing leads compatible with fine-pitch SMT processes.
What is the reverse leakage current specification for SMBG12C-E3/5B at its stand-off voltage?
The SMBG12C-E3/5B exhibits a maximum reverse leakage current (ID) of 1 μA at its 12 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures minimal DC loading on protected signal paths - critical for high-impedance sensor inputs and precision analog circuits. The SMBG12C-E3/5B maintains this spec across its full operating temperature range due to glass passivation.
Does SMBG12C-E3/5B have polarity markings, and how is it oriented during placement?
No, SMBG12C-E3/5B is a bi-directional TVS and carries no polarity marking - both terminals are functionally identical. During PCB placement, orientation is arbitrary; either end may face the protected line or ground. This simplifies automated pick-and-place programming and eliminates orientation-related assembly errors. The SMBG12C-E3/5B's symmetry is confirmed in Vishay's datasheet Note: "no marking on bi-directional types".
SMBG12C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG12C-E3/5B FAQ
1.How can I place an order for SMBG12C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12C-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 SMBG12C-E3/5B reliable?
The price and inventory of SMBG12C-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 SMBG12C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG12C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12C-E3/5B?
SMBG12C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12C-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 SMBG12C-E3/5B?
For technical support, including SMBG12C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12C-E3/5B requirements.
6.How does Aetrix verify that SMBG12C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG12C-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 SMBG12C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG12C-E3/5B?
All SMBG12C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12C-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 SMBG12C-E3/5B part is unused and in its original packaging.
Return procedure for SMBG12C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12C-E3/5B Tags
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