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Vishay General Semiconductor - Diodes Division SMBG188CAHE3/5B
- Part No.:
- SMBG188CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG188CAHE3/5B.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,507
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Product details
Overview
SMBG188CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for high-energy surge protection on signal and power lines. It features 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), clamping voltage of 328 V at 2.0 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG188CAHE3/5B datasheet, SMBG188CAHE3/5B pinout, SMBG188CAHE3/5B application, or SMBG188CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, junction temperature range (–55 °C to +150 °C), low incremental surge resistance, UL 94 V-0 molding compound, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low RθJA of 100 °C/W supports thermal management under repetitive surge conditions.
The device complies with ANSI/IEEE C62.35 for surge protector definitions and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak. It is rated for 8.3 ms half-sine surge current up to 100 A (unidirectional only - not applicable here), but as a bidirectional part, it delivers symmetrical clamping across ±328 V at rated IPPM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 209 V / 231 V at 1.0 mA - guaranteed breakdown threshold range for reliable turn-on |
| VC @ IPPM | 328 V at 2.0 A - clamped voltage during 600 W surge, defining protected circuit's max stress level |
| PPPM | 600 W (10/1000 μs waveform) - peak surge energy handling capacity per transient event |
| TJ Range | –55 °C to +150 °C - operational and storage temperature envelope supporting under-hood automotive use |
| Qualification | AEC-Q101 qualified - validated for automotive electronics reliability including temperature cycling and HTRB |
| Package | SMBG (DO-215AA) - surface-mount outline with 0.235" × 0.130" footprint and 0.077" height for automated placement |
Pinout & Package
Two-terminal bidirectional device in SMBG (DO-215AA) package; no polarity marking. Terminals are matte tin-plated leads compatible with J-STD-002 soldering standards. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per datasheet fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Surge current path | Identical terminals - bidirectional conduction enables clamp-on-both-polarity transients without orientation dependency |
| Case (SMBG body) | Thermal and mechanical interface | UL 94 V-0 molded compound provides flame resistance; low RθJL = 20 °C/W aids heat transfer to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Combination Wave (1.2/50 μs & 8/20 μs) |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 μA at VWM) over temperature and lifetime |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard lead-free reflow profiles up to 260 °C peak |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC/DC converters and microcontrollers. Use Value: Limits voltage to ≤328 V during 600 W surges, preventing damage to downstream 36 V-rated input stages. | Use Scenario: Safeguarding analog front-ends of pressure, temperature, or position sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential RS-485 or CAN FD signal pairs exposed to ESD and inductive switching noise. Use Value: Symmetrical clamping preserves signal integrity on floating lines while meeting IEC 61000-4-2 Level 4 (±15 kV contact discharge). |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Front-end protection of DSL or POTS line interface circuits subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS on tip/ring inputs, coordinated with GDT or MOV secondary protection. Use Value: Fast <1 ns response and 328 V clamping prevent latch-up in SLIC ICs during 10/1000 μs transients up to 600 W. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Across-motor terminals or between motor and H-bridge MOSFETs to clamp inductive kickback. Use Value: Handles repetitive 2.0 A surge current events with minimal derating up to +125 °C ambient, extending board lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG188CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free materials are mandated by OEM or regional regulations | Choose SMBG188CA-M3/5B when compliance with JEDEC J-STD-202 Method 212 (halogen content) is required. |
| SMAJ188CA-E3/5B | Same VWM/VBR/VC, but in smaller SMA (DO-214AC) package; lower PPPM = 400 W; RθJA = 135 °C/W | Lower surge margin and higher thermal resistance limit use to less severe environments or lower duty cycles | Use SMAJ188CA-E3/5B only if board space constraints prohibit SMBG footprint and surge energy remains ≤400 W. |
Compared with SMBG188CAHE3/5B, the M3/5B alternative offers identical protection performance with halogen-free construction, while the SMAJ188CA-E3/5B trades package size for reduced surge capability and thermal performance - making SMBG188CAHE3/5B optimal for high-reliability automotive and industrial deployments requiring full 600 W margin and AEC-Q101 validation.
Availability
SMBG188CAHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom line cards, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBG188CAHE3/5B 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 optimization.
The SMBG TRANSZORB® series is engineered for robust transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom systems where high-energy surges, thermal cycling, and long service life are critical design requirements.
FAQ
What is the clamping voltage of SMBG188CAHE3/5B and how is it measured?
The SMBG188CAHE3/5B has a maximum clamping voltage (VC) of 328 V, measured at a peak pulse current (IPPM) of 2.0 A using a 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value defines the upper voltage limit imposed on protected circuitry during a surge event and is confirmed per datasheet page 3, table "ELECTRICAL CHARACTERISTICS" for SMBG188A.
Is SMBG188CAHE3/5B unidirectional or bidirectional?
SMBG188CAHE3/5B is a bidirectional TVS diode, indicated by the "CA" suffix per Vishay's naming convention. It provides symmetrical clamping for both positive and negative transients without polarity dependence, and carries no cathode band marking - unlike unidirectional variants such as SMBG188A.
Does SMBG188CAHE3/5B meet automotive qualification standards?
Yes, SMBG188CAHE3/5B is AEC-Q101 qualified (noted in Mechanical Data section and footnote 1 on page 3), confirming its suitability for automotive applications including engine control, body electronics, and ADAS subsystems. The HE3 suffix explicitly denotes AEC-Q101 qualification per Vishay's ordering information table.
What is the package type and mounting requirement for SMBG188CAHE3/5B?
SMBG188CAHE3/5B uses the SMBG (DO-215AA) surface-mount package with dimensions 0.235" × 0.130". Per datasheet page 5, it requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for optimal thermal dissipation and surge current handling - critical to maintain rated 600 W PPPM.
How does the "HE3/5B" suffix in SMBG188CAHE3/5B affect its specifications?
"HE3" indicates RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads; "5B" specifies 13" diameter tape-and-reel packaging with 3200 units per reel. These suffixes do not alter electrical parameters - all ratings (VWM, VBR, VC, PPPM) match the base SMBG188CA family as defined in the primary datasheet.
SMBG188CAHE3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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-215AA (SMBG)
SMBG188CAHE3/5B FAQ
1.How can I place an order for SMBG188CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG188CAHE3/5B 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 SMBG188CAHE3/5B reliable?
The price and inventory of SMBG188CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG188CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG188CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG188CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG188CAHE3/5B?
SMBG188CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG188CAHE3/5B 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 SMBG188CAHE3/5B?
For technical support, including SMBG188CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG188CAHE3/5B requirements.
6.How does Aetrix verify that SMBG188CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG188CAHE3/5B 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 SMBG188CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG188CAHE3/5B?
All SMBG188CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG188CAHE3/5B, 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 SMBG188CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG188CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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