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Vishay General Semiconductor - Diodes Division SMBG188AHE3/5B
- Part No.:
- SMBG188AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG188AHE3/5B.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,942
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Product details
Overview
SMBG188AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMBG (DO-215AA) package, rated for 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), and 600 W peak pulse power (10/1000 μs). It provides robust overvoltage protection for automotive power lines and industrial sensor interfaces where high clamping efficiency and AEC-Q101 qualification are required.
For engineers reviewing the SMBG188AHE3/5B datasheet, SMBG188AHE3/5B pinout, SMBG188AHE3/5B application, or SMBG188AHE3/5B equivalent, this device is selected for high-voltage transient suppression in 24 V/48 V automotive subsystems, motor drive gate driver protection, and industrial I/O line hardening-where low leakage (<1.0 μA at VWM), fast response time, and 150 °C junction temperature capability are critical design constraints.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt surge current away from sensitive downstream circuitry during ESD or load-dump events. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, enabling consistent clamping at 328 V (VC) under 2.0 A peak pulse current (IPPM).
The SMBG188AHE3/5B is qualified to AEC-Q101, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Its thermal resistance (RθJA = 100 °C/W) is specified on 0.2" × 0.2" copper pads, supporting reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 24 V/48 V automotive supply rails. |
| VBR (min/max) | 209 V / 231 V at IT = 1 mA - Confirmed breakdown threshold with ±5 % tolerance; ensures predictable turn-on during transients. |
| VC @ IPPM | 328 V at 2.0 A (10/1000 μs) - Clamped voltage during worst-case surge; limits stress on protected MOSFETs or controllers. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in always-on systems. |
| PPPM | 600 W - Peak pulse power handling capacity; supports repetitive surges at 0.01 % duty cycle without degradation. |
| TJ max | +150 °C - Maximum junction temperature rating; enables deployment in under-hood automotive environments. |
| Package | SMBG (DO-215AA) - Low-profile SMD outline with 0.235" × 0.130" footprint; optimized for automated placement and high-density PCB layouts. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing lead form. Cathode identified by band marking on body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side reference; forms return path during clamping. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., battery rail); absorbs positive transients when referenced to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in engine control, ADAS, and body electronics. |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) surges up to 300 V without failure, assuming proper PCB layout and thermal management. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts), improving clamping precision and downstream IC survivability. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
Applications
| Automotive Load-Dump Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses ISO 7637-2 Pulse 5a (load dump) transients on 24 V vehicle battery rails feeding ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery input and DC/DC converter input stage. Use Value: Limits voltage seen by upstream regulators to ≤328 V, preventing latch-up or permanent damage during alternator field collapse events. | Use Scenario: Protects analog output lines of pressure/temperature sensors in factory automation PLC I/O modules exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between sensor output and ground, with VWM > max signal swing (e.g., 0–20 mA loop). Use Value: Clamps fast EFT bursts (IEC 61000-4-4) below 328 V while adding <1.0 μA leakage-preserving 16-bit DAC accuracy and long-term calibration stability. |
| MOSFET Gate Driver Protection | 48 V Telecom Power Interface |
Use Scenario: Shields high-side N-channel MOSFET gate drivers in motor control inverters from shoot-through-inducing voltage spikes during switching transitions. IC Role / Device Role / Timing Role: TVS placed between gate and source terminals to clamp Miller-induced dv/dt spikes. Use Value: Responds in <1 ns to limit gate-source voltage to ≤328 V, preventing unintended turn-on and reducing risk of cross-conduction failure. | Use Scenario: Safeguards primary-side controller ICs in 48 V telecom rectifier modules against lightning-induced surges on AC input lines. IC Role / Device Role / Timing Role: Primary-side unidirectional TVS mounted across bridge rectifier output, referenced to bulk capacitor ground. Use Value: Absorbs 600 W surges with 328 V clamping, maintaining system uptime during Category III surge events per IEC 61000-4-5. |
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/VC, but SMB (DO-214AA) package (larger footprint, higher RθJA = 125 °C/W) | Less suitable for ultra-dense layouts; lower power density due to larger pad area and thermal resistance. | Select SMBJ188A-E3/5B only if legacy board space allows larger SMB outline and thermal margin is sufficient. |
| SMAJ188AHE3/5B | Same electrical specs, but SMA (DO-214AC) package (smaller than SMBG, RθJA = 140 °C/W, lower IPPM derating) | Lower surge current handling at elevated ambient temperatures; not AEC-Q101 qualified. | Choose SMAJ188AHE3/5B only for cost-sensitive non-automotive applications where space is constrained and AEC-Q101 is not required. |
Compared with SMBJ188A-E3/5B and SMAJ188AHE3/5B, the SMBG188AHE3/5B delivers optimal balance of AEC-Q101 compliance, 600 W surge capability, and compact DO-215AA packaging-making it the preferred choice for new automotive and industrial designs requiring validated reliability and high power density.
Availability
SMBG188AHE3/5B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and 48 V telecom power supply surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG188AHE3/5B 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 optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBG Transient Voltage Suppressor family is engineered for high-energy surge immunity in harsh environments-targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low leakage, and precise clamping are mandatory.
FAQ
What is the maximum clamping voltage of SMBG188AHE3/5B under a 10/1000 μs surge?
The SMBG188AHE3/5B has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current of 2.0 A with a 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 standardized surge events.
Is SMBG188AHE3/5B suitable for bidirectional transient suppression?
No, SMBG188AHE3/5B is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in the part number. Bidirectional variants (e.g., SMBG188CA) are required for AC-coupled or symmetric surge protection; using SMBG188AHE3/5B in such configurations would result in forward conduction and potential failure.
Does SMBG188AHE3/5B meet automotive qualification standards?
Yes, SMBG188AHE3/5B is AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 09-Jan-2024 (Document Number 88456), Section "MECHANICAL DATA". The HE3 suffix explicitly denotes AEC-Q101 qualification, making it suitable for automotive powertrain, chassis, and body electronics applications.
What is the reverse leakage current specification for SMBG188AHE3/5B at its stand-off voltage?
At VWM = 188 V and TA = 25 °C, the SMBG188AHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage preserves signal fidelity in high-impedance sensor interfaces and minimizes quiescent power draw in always-on automotive modules.
What package type does SMBG188AHE3/5B use, and what are its key mechanical identifiers?
SMBG188AHE3/5B uses the SMBG (DO-215AA) package: a low-profile gull-wing SMD outline measuring 0.235" × 0.130" (5.97 mm × 3.30 mm), with cathode identified by a visible band. The "5B" suffix indicates 13" tape-and-reel packaging with 3200 units per reel.
SMBG188AHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG188AHE3/5B FAQ
1.How can I place an order for SMBG188AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG188AHE3/5B 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 SMBG188AHE3/5B reliable?
The price and inventory of SMBG188AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG188AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG188AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG188AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG188AHE3/5B?
SMBG188AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG188AHE3/5B 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 SMBG188AHE3/5B?
For technical support, including SMBG188AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG188AHE3/5B requirements.
6.How does Aetrix verify that SMBG188AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG188AHE3/5B 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 SMBG188AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG188AHE3/5B?
All SMBG188AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG188AHE3/5B, 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 SMBG188AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG188AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG188AHE3/5B Tags
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