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Vishay General Semiconductor - Diodes Division SMBG188A-E3/52
- Part No.:
- SMBG188A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG188A-E3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,148
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Product details
Overview
SMBG188A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for high-energy surge protection with 188 V stand-off voltage, 209–231 V breakdown voltage at 1 mA, 328 V clamping voltage at 2.0 A peak pulse current, and 600 W peak pulse power capability under 10/1000 μs waveform. It protects automotive power electronics and industrial control signal lines against inductive switching transients.
For engineers reviewing the SMBG188A-E3/52 datasheet, SMBG188A-E3/52 pinout, SMBG188A-E3/52 application, or SMBG188A-E3/52 equivalent, key selection criteria include clamping voltage margin relative to system rail, junction temperature derating above 25 °C, unidirectional polarity marking (cathode band), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (209–231 V), it avalanches to limit transient energy by diverting surge current to ground. Its low incremental surge resistance ensures minimal voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a).
Designed for surface-mount automated placement on PCBs with 0.2" × 0.2" copper pads per terminal, it meets MSL level 1 (260 °C peak reflow) and supports junction temperatures from –55 °C to +150 °C. The glass-passivated junction enables stable performance across automotive thermal cycling profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; sets upper limit for protected line's nominal DC rail. |
| VBR @ IT = 1 mA | 209–231 V - guaranteed avalanche initiation range; defines minimum overvoltage threshold for clamping action. |
| VC @ IPPM = 2.0 A | 328 V - maximum clamped voltage during 10/1000 μs surge; determines worst-case stress on downstream ICs. |
| PPPM | 600 W - peak pulse power handling under standardized waveform; validates robustness against common automotive load-dump surges. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood environments without thermal shutdown. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard pad layout; informs PCB copper area requirements for sustained surge duty. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002/JESD 22-B102. Polarity marked by cathode band on case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | Protected line interface | Connected to line being protected (e.g., 12 V battery rail); band-marked end indicates polarity for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring zero-failure reliability over lifetime thermal cycles. |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) up to 40 V superimposed on 14 V nominal system, enabling single-device protection without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning, supporting high-yield SMT assembly in Tier-1 automotive manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping device placed between battery rail and ground, activated within <1 ns upon overvoltage detection. Use Value: Limits peak voltage to 328 V, preventing damage to 36 V-rated power management ICs and ensuring functional safety compliance. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SMBG188A-E3/52 is unidirectional, used with series resistor for bidirectional effect) on 24 V signal lines. Use Value: Clamps 1 kV/μs transients to ≤328 V within nanoseconds, preserving ADC input integrity and avoiding system resets. |
| Telecom Power Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered Ethernet switch ports from lightning-induced surges coupled via AC mains or data lines. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input stage, coordinated with secondary GDT or MOV for staged energy absorption. Use Value: Absorbs 600 W peak energy without degradation, maintaining isolation barrier integrity and meeting IEC 61000-4-5 Level 4 immunity. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Unidirectional clamp across motor terminals or H-bridge supply rails, triggered only during negative-going transients. Use Value: Prevents MOSFET drain-source breakdown by limiting voltage to 328 V, extending power stage lifetime and reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG188A-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No difference in circuit function or layout; selected where halogen-free material compliance is mandated. | Choose SMBG188A-M3/52 when environmental compliance requires halogen-free construction without sacrificing performance. |
| SMBG188AHM3/52 | Halogen-free and AEC-Q101 qualified; same VWM, VBR, VC, PPPM, and thermal specs as SMBG188A-E3/52. | Identical automotive suitability; differs only in packaging suffix and material certification scope. | Select SMBG188AHM3/52 when both halogen-free and AEC-Q101 qualifications are required simultaneously. |
Compared with SMBG188A-E3/52, the M3-suffix variant offers identical protection performance with halogen-free molding compound, while the HM3-suffix part adds dual compliance-making it suitable for next-generation automotive platforms demanding stricter material declarations without redesign.
Availability
SMBG188A-E3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom power interface hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMBG188A-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, efficiency, and automotive-grade qualification.
The SMBG series was developed specifically for high-power transient suppression in space-constrained automotive and industrial environments, balancing clamping performance, thermal robustness, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMBG188A-E3/52 at its rated peak pulse current?
The SMBG188A-E3/52 has a maximum clamping voltage (VC) of 328 V at a peak pulse current (IPPM) of 2.0 A under the 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events. The SMBG188A-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMBG188A-E3/52 suitable for automotive applications?
Yes, SMBG188A-E3/52 is AEC-Q101 qualified and rated for junction temperatures from –55 °C to +150 °C, making it suitable for under-hood and chassis-mounted automotive electronics. Its 600 W peak pulse power rating and low clamping ratio meet ISO 7637-2 Pulse 5a requirements. The SMBG188A-E3/52 is commonly deployed in battery management systems and body control modules.
How does the SMBG188A-E3/52 differ from bidirectional variants like SMBG188CA?
The SMBG188A-E3/52 is unidirectional, with polarity indicated by a cathode band, and conducts only in reverse breakdown. In contrast, SMBG188CA is bidirectional, symmetrical in both directions, and lacks polarity marking. Electrical parameters (VWM, VBR, VC) are identical, but SMBG188A-E3/52 must be oriented correctly in-circuit, whereas SMBG188CA can be placed without orientation concern.
What is the thermal resistance of SMBG188A-E3/52, and how does it affect layout?
The SMBG188A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain safe junction temperature during repetitive surges, PCB layout must provide adequate copper area and thermal vias. Reducing RθJA improves surge endurance-critical for applications with frequent transients. The SMBG188A-E3/52 datasheet specifies exact pad dimensions for optimal thermal performance.
Does SMBG188A-E3/52 require derating at elevated ambient temperatures?
Yes, SMBG188A-E3/52 must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88456). At 85 °C ambient, its peak pulse power drops to approximately 420 W (70 % of 600 W). Derating ensures junction temperature remains below 150 °C during surge events. Designers must apply this curve when sizing SMBG188A-E3/52 for high-temperature enclosures or densely packed boards.
SMBG188A-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:
- 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-E3/52 FAQ
1.How can I place an order for SMBG188A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG188A-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 SMBG188A-E3/52 reliable?
The price and inventory of SMBG188A-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 SMBG188A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG188A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG188A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG188A-E3/52?
SMBG188A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG188A-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 SMBG188A-E3/52?
For technical support, including SMBG188A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG188A-E3/52 requirements.
6.How does Aetrix verify that SMBG188A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG188A-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 SMBG188A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG188A-E3/52?
All SMBG188A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG188A-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 SMBG188A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG188A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG188A-E3/52 Tags
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