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Vishay General Semiconductor - Diodes Division SMBG188CAHE3/52
- Part No.:
- SMBG188CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG188CAHE3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,245
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Product details
Overview
SMBG188CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 188 V stand-off voltage (VWM), 231 V minimum breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive electronics protection against inductive switching transients and ESD on signal lines.
For engineers reviewing the SMBG188CAHE3/52 datasheet, SMBG188CAHE3/52 pinout, SMBG188CAHE3/52 application, or SMBG188CAHE3/52 equivalent, this device is selected for high-voltage rail clamping in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression where bidirectional clamping, low leakage (<1.0 μA at VWM), and 150 °C junction temperature capability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR (209–231 V), VC = 328 V at IPPM = 2.0 A, and ultra-low clamping ratio (VC/VBR ≈ 1.42). Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
Designed for repetitive surge immunity, it sustains 600 W peak pulse power under 0.01% duty cycle, derates linearly above 25 °C per Fig. 2, and exhibits RθJA = 100 °C/W and RθJL = 20 °C/W for thermal management in compact PCB layouts with 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 180–190 V DC rails. |
| VBR (min/max) | 209 V / 231 V - Breakdown occurs within this range at 1 mA test current; ensures predictable clamping onset across production lot. |
| VC @ IPPM | 328 V - Clamped voltage at 2.0 A peak pulse current; limits downstream IC stress during 10/1000 μs surge events. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| ID @ VWM | <1.0 μA - Reverse leakage at full stand-off voltage; minimizes quiescent power loss in high-impedance sensor circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD per JESD22 standards. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant, halogen-free option available (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts surge current during negative voltage excursions; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive half-cycle) | Accepts surge current during positive voltage excursions; electrically identical to anode in bidirectional devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS sensor interface designs. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity limitations. |
| Glass passivated junction | Ensures stable VBR, low leakage, and long-term parameter stability under thermal cycling. |
Applications
| Automotive Sensor Interface | Industrial Fieldbus Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role: Bidirectional clamping element placed between bus line and ground, limiting voltage to ≤328 V during 10/1000 μs surges. Use Value: Prevents damage to ISO 11898-2/3 compliant transceivers by clamping at 328 V while maintaining <1.0 μA leakage at 188 V nominal rail. |
Use Scenario: Shielding RS-485/RS-422 differential pairs in PLC I/O modules exposed to lightning-induced surges. IC Role / Device Role: Line-to-ground TVS on each data line, leveraging symmetrical breakdown to handle ±231 V transients. Use Value: Enables compliance with IEC 61000-4-5 Level 4 (4 kV) testing using a single SMBG device per line without polarity constraints. |
| Telecom Line Card Surge Suppression | High-Voltage DC Power Rail Clamp |
Use Scenario: Protecting Ethernet PHY front-end circuitry in PoE-powered switches from induced surges on RJ45 ports. IC Role / Device Role: Secondary-level TVS after gas discharge tube (GDT), clamping residual transients to safe levels for magnetics and PHY ICs. Use Value: Delivers 328 V clamping at 2.0 A with sub-nanosecond response, reducing let-through energy to <10 mJ for downstream 3.3 V/5 V logic. |
Use Scenario: Safeguarding 170–190 V DC intermediate bus in industrial motor drives from regenerative voltage spikes. IC Role / Device Role: Parallel-connected TVS across bulk capacitor, absorbing short-duration overvoltage events exceeding 188 V. Use Value: Provides 600 W pulse power headroom and +150 °C operation to survive repeated 200 V transients in enclosed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA), slightly larger footprint (4.58 × 3.94 mm vs. 4.57 × 3.94 mm). | Less suitable for ultra-dense automotive modules due to 0.1 mm wider body and higher RθJA (110 °C/W). | Select SMBJ188CA only if existing layout accommodates SMB footprint and thermal margin permits higher junction rise. |
| SMCJ188CA | Same electrical specs, but larger SMC (DO-214AB) package: 7.11 × 6.22 mm, PPPM = 1500 W, RθJA = 50 °C/W. | Preferred for high-power industrial systems requiring >600 W surge handling or improved thermal dissipation. | Choose SMCJ188CA when board space allows and thermal design requires lower junction temperature rise under sustained surge conditions. |
Compared with SMBG188CAHE3/52, SMBJ188CA offers identical clamping performance in a marginally less space-efficient package, while SMCJ188CA trades miniaturization for 2.5× higher pulse power and superior thermal resistance-making SMBG188CAHE3/52 optimal for AEC-Q101-compliant, space-constrained automotive and telecom edge nodes.
Availability
SMBG188CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial fieldbus hardening, and telecom line-card surge suppression requiring stable component supply, AEC-Q101 qualification, and consistent 188 V stand-off performance.
Supply support for SMBG188CAHE3/52 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, automotive qualification, and high-volume manufacturability.
The SMBG series was developed specifically for space-constrained, high-reliability transient suppression in automotive and industrial environments-prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping behavior across temperature and life cycle.
FAQ
What is the maximum clamping voltage of SMBG188CAHE3/52 under surge conditions?
The SMBG188CAHE3/52 has a maximum clamping voltage (VC) of 328 V at 2.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during standardized surge events. The SMBG188CAHE3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBG188CAHE3/52 suitable for automotive applications?
Yes, SMBG188CAHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its HE3 suffix denotes RoHS compliance and AEC-Q101 qualification, and its 150 °C maximum junction temperature supports under-hood deployment. The SMBG188CAHE3/52 meets humidity, thermal cycling, and HTRB requirements defined in the AEC-Q101 stress test standard.
How does the bidirectional configuration of SMBG188CAHE3/52 affect its circuit placement?
The SMBG188CAHE3/52 has no polarity marking and functions identically in both directions, allowing placement between any two nodes requiring symmetrical overvoltage protection-such as differential signal lines, AC-coupled interfaces, or floating power domains. Unlike unidirectional TVS diodes, the SMBG188CAHE3/52 eliminates orientation errors during automated assembly and simplifies layout for balanced clamping without external biasing.
What is the reverse leakage current specification for SMBG188CAHE3/52 at its rated stand-off voltage?
At its 188 V stand-off voltage (VWM), the SMBG188CAHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per the Vishay datasheet (Document Number: 88456). This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and minimizes standby power loss in battery-operated systems using the SMBG188CAHE3/52.
Does SMBG188CAHE3/52 require special PCB layout considerations for thermal performance?
Yes-the SMBG188CAHE3/52 achieves its rated 600 W pulse power only when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the datasheet. Smaller pads increase thermal resistance (RθJA = 100 °C/W), risking junction overheating during repetitive surges. For reliable operation, the SMBG188CAHE3/52 must be routed with adequate copper area and avoid thermal isolation from ground planes.
SMBG188CAHE3/52 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:
- -
- 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)
SMBG188CAHE3/52 FAQ
1.How can I place an order for SMBG188CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG188CAHE3/52 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 SMBG188CAHE3/52 reliable?
The price and inventory of SMBG188CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG188CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG188CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG188CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG188CAHE3/52?
SMBG188CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG188CAHE3/52 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 SMBG188CAHE3/52?
For technical support, including SMBG188CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG188CAHE3/52 requirements.
6.How does Aetrix verify that SMBG188CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG188CAHE3/52 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 SMBG188CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG188CAHE3/52?
All SMBG188CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG188CAHE3/52, 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 SMBG188CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG188CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG188CAHE3/52 Tags
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