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Vishay General Semiconductor - Diodes Division SMBG188A-E3/5B
- Part No.:
- SMBG188A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG188A-E3/5B.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,190
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Product details
Overview
SMBG188A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for high-energy surge protection on power and signal lines. It features 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), 2.0 A maximum reverse leakage at VWM, and clamps transients to ≤328 V at 2.0 A peak pulse current - deployed in automotive power supply rails and industrial sensor interfaces.
For engineers reviewing the SMBG188A-E3/5B datasheet, SMBG188A-E3/5B pinout, SMBG188A-E3/5B application, or SMBG188A-E3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and packaging details for reliable board-level ESD/surge design validation.
Technical Context
This unidirectional TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its specified VBR (209–231 V), limiting transient energy with low incremental surge resistance and fast response time (<1 ns). Its glass-passivated junction ensures stable breakdown characteristics under repetitive surge stress.
Rated for 600 W peak pulse power (10/1000 μs waveform, 0.01% duty cycle), it supports surge currents up to 2.0 A under defined test conditions and maintains clamping voltage ≤328 V. The device is qualified to AEC-Q101 and meets MSL Level 1 (260 °C reflow peak), making it suitable for automotive under-hood and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 209 V / 231 V - Breakdown occurs within this range at 1 mA test current; defines precise clamping onset threshold. |
| VC @ IPPM | ≤328 V - Clamped voltage at 2.0 A peak pulse current; determines worst-case overvoltage seen by protected ICs. |
| PPPM | 600 W - Peak surge power handling capability with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports protection during high-current load dump events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial settings. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Surge input node | Connected to protected line (e.g., 24 V rail or sensor output); conducts avalanche current when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring long-term reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 combination wave surges up to ±2 kV (open-circuit) / ±1 kA (short-circuit) without degradation. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift across temperature and lifetime, critical for precision protection circuits. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving clamping fidelity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and chassis ground to shunt surge energy away from downstream regulators and microcontrollers. Use Value: Limits transient voltage to ≤328 V during 100 A load dump events, preventing damage to 36 V-rated DC/DC converters and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Standoff-mode protector on 4–20 mA current loop outputs, triggered only during cable ESD or inductive switching spikes. Use Value: Maintains <2.0 μA leakage at 188 V, ensuring minimal impact on loop accuracy while clamping 1 kV ESD pulses to safe levels. |
| Telecom Line Card Surge Suppression | Renewable Energy Inverter DC Link Protection |
Use Scenario: Secondary surge protection on AC/DC converter outputs feeding telecom base station backplane logic. IC Role / Device Role / Timing Role: Coordinated clamping stage downstream of GDT or MOV primary protectors, absorbing residual energy with precise VBR. Use Value: Tight 209–231 V VBR window enables staged protection architecture with predictable coordination margins versus upstream devices. |
Use Scenario: Overvoltage suppression on photovoltaic string inputs of solar inverters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-VWM TVS connected across DC bus capacitors to clamp fast transients before they stress IGBT gate drivers. Use Value: 188 V VWM allows operation across wide MPPT voltage ranges (up to 1500 VDC systems) while maintaining margin to system max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188A-E3/5B | Same VWM/VBR ratings but lower PPPM (600 W vs. SMBG's 600 W), identical SMB package; differs in thermal resistance (RθJA = 110 °C/W vs. 100 °C/W). | Less effective heat dissipation under sustained surge duty cycles; not recommended for automotive under-hood use above 105 °C ambient. | Select SMBG188A-E3/5B where tighter thermal performance and AEC-Q101 qualification are required. |
| 1.5SMC188A | Same VWM/VBR and PPPM, but larger SMC (DO-214AB) package; higher IFSM (200 A vs. 100 A), RθJA = 60 °C/W. | Better surge endurance and thermal headroom, but requires larger PCB area and incompatible footprint. | Choose 1.5SMC188A only when board space permits and higher single-pulse surge margin is needed. |
Compared with SMBJ188A-E3/5B and 1.5SMC188A, SMBG188A-E3/5B offers optimal balance of AEC-Q101 compliance, SMBG footprint compatibility, and thermal performance for space-constrained automotive and industrial designs - neither drop-in nor footprint-compatible with the alternatives.
Availability
SMBG188A-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge suppression, and renewable energy inverter DC link protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBG188A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-profile packaging, and precise clamping performance.
FAQ
What is the maximum clamping voltage of the SMBG188A-E3/5B under rated surge conditions?
The SMBG188A-E3/5B exhibits a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current (IPPM) of 2.0 A using the 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during transient events. Designers must verify that downstream components tolerate this clamped level with appropriate safety margin. The SMBG188A-E3/5B achieves this performance while maintaining 188 V stand-off capability.
Is the SMBG188A-E3/5B suitable for automotive applications?
Yes, the SMBG188A-E3/5B is AEC-Q101 qualified and rated for operation from −55 °C to +150 °C junction temperature, making it suitable for under-hood and powertrain applications. Its glass-passivated junction, MSL Level 1 reflow compatibility, and 100 A IFSM support robustness against load dump and ISO 7637-2 pulses. The SMBG188A-E3/5B is explicitly listed in Vishay's AEC-Q101 qualified portfolio (document 88456, footnote 1), confirming its suitability for automotive ECUs and body control modules.
What does the "E3/5B" suffix indicate in SMBG188A-E3/5B?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format supports high-volume automated assembly and is distinct from the "52" variant (7-inch reel, 750 units). The SMBG188A-E3/5B ordering code ensures traceable, standardized logistics for production programs requiring consistent reel configuration and compliance documentation.
How does the SMBG188A-E3/5B differ from bidirectional TVS diodes like SMBG188CA?
The SMBG188A-E3/5B is unidirectional and features a cathode band marking; it conducts only in reverse avalanche mode and blocks forward current beyond ~3.5 V. In contrast, SMBG188CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. The SMBG188A-E3/5B is intended for DC line protection where polarity is fixed (e.g., 24 V supply rails), whereas SMBG188CA suits AC-coupled or differential signal lines. Their VBR and VC values are identical, but conduction behavior differs fundamentally.
What PCB layout considerations apply to the SMBG188A-E3/5B?
Per Vishay's datasheet, the SMBG188A-E3/5B must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal and surge performance. Trace inductance between the device and protected node must be minimized - ideally <5 mm - to prevent voltage overshoot during fast transients. Ground connections should be low-impedance and thermally robust; the SMBG188A-E3/5B's RθJA of 100 °C/W assumes this pad layout. Avoid routing sensitive traces near the SMBG188A-E3/5B anode/cathode paths.
SMBG188A-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):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 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)
SMBG188A-E3/5B FAQ
1.How can I place an order for SMBG188A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG188A-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 SMBG188A-E3/5B reliable?
The price and inventory of SMBG188A-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 SMBG188A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG188A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG188A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG188A-E3/5B?
SMBG188A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG188A-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 SMBG188A-E3/5B?
For technical support, including SMBG188A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG188A-E3/5B requirements.
6.How does Aetrix verify that SMBG188A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG188A-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 SMBG188A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG188A-E3/5B?
All SMBG188A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG188A-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 SMBG188A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG188A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG188A-E3/5B Tags
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