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Vishay General Semiconductor - Diodes Division SMBJ188AHE3_B/I
- Part No.:
- SMBJ188AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188AHE3_B/I.pdf
- Description:
- 600W,188V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ188AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR) at 1 mA, 328 V maximum clamping voltage (VC) at 2.0 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), suitable for protecting MOSFETs and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ188AHE3_B/I datasheet, SMBJ188AHE3_B/I pinout, SMBJ188AHE3_B/I application, or SMBJ188AHE3_B/I equivalent, key selection criteria include clamping performance under 2.0 A surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and compatibility with SMB (DO-214AA) PCB footprints in high-reliability embedded systems.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds its VBR range (209–231 V), with fast response time (<1 ns) and low incremental surge resistance to limit transient energy delivered to downstream circuitry. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surge stress.
The device is rated for 150 °C maximum junction temperature, derates linearly above 25 °C ambient per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is RoHS-compliant and AEC-Q101 qualified - indicated by the "HE3" suffix - making it suitable for automotive power electronics where transient immunity and process traceability are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC rail margin. |
| VBR (min/max) | 209 V / 231 V at 1.0 mA - guaranteed avalanche initiation window; determines minimum overvoltage threshold. |
| VC @ IPPM | 328 V at 2.0 A (10/1000 µs) - clamped voltage seen by protected IC during worst-case surge; sets downstream voltage stress limit. |
| PPPM | 600 W - peak transient power dissipation capability; enables protection against IEC 61000-4-5 Level 4 surges on 24/48 V systems. |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage; ensures negligible standby power loss in battery-powered applications. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty. |
| TJ max. | +150 °C - maximum allowable junction temperature; supports operation in under-hood automotive or industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-biased during clamping) | Connected to system ground or low-side reference; completes clamp path during overvoltage events. |
| Cathode | Avalanche conduction terminal (marked with band) | Connected to protected line (e.g., 188 V supply rail); conducts reverse current when V > VBR to shunt surge energy. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control and ADAS power stages. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 24–48 V industrial buses and automotive load-dump events without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage overshoot during clamping - critical for safeguarding 200 V-rated MOSFETs and gate drivers. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; reduces manufacturing complexity and cost in high-volume production. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity and thermal cycling stress in outdoor equipment. |
Applications
| Industrial Motor Drive Power Stage | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of high-side N-channel MOSFETs in 48 V BLDC motor inverters subjected to inductive kickback and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS placed between drain and ground to clamp flyback spikes exceeding 200 V. Use Value: Limits drain-source voltage to ≤328 V during 2.0 A surge, preventing MOSFET avalanche failure and ensuring >100,000-cycle reliability. |
Use Scenario: Input rail protection for microcontroller-based BCMs powered from vehicle battery with frequent alternator load dumps. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12–14 V input rail, triggered only during >188 V transients (e.g., ISO 7637-2 Pulse 5a). Use Value: Maintains <1 µA leakage at nominal voltage while clamping 100 V/ms surges to safe levels for 3.3 V logic supplies. |
| Telecom Remote Radio Unit (RRU) Power Supply | Factory Automation Sensor Hub Interface |
|
Use Scenario: DC feed line protection in 48 V PoE-like RRU power inputs exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters, sized for 600 W IEC 61000-4-5 combination wave. Use Value: Delivers 328 V clamping at 2.0 A with <1 ns response, preserving converter FETs and enabling compliance with EN 61000-4-5 Level 4. |
Use Scenario: Protection of analog input channels (e.g., 4–20 mA loops) connected to PLC backplanes in noisy factory environments. IC Role / Device Role / Timing Role: Rail-to-rail TVS on sensor supply line to suppress ESD and switching noise coupled from adjacent VFDs. Use Value: 1.0 µA leakage at 188 V ensures minimal offset error in precision current sensing; 100 °C/W RθJA allows use without heatsink on standard FR4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHM3_B/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs but different material composition. | Required where halogen-free compliance is mandated (e.g., EU public transport, aerospace wiring standards). | Select SMBJ188AHM3_B/I when halogen-free materials are specified in BOM; otherwise SMBJ188AHE3_B/I satisfies general automotive/industrial use. |
| SMCJ188AHE3_A/I | Larger SMC (DO-214AB) package, higher 1500 W PPPM rating, same VWM/VBR/VC specs, RθJA = 40 °C/W. | Better suited for high-duty-cycle or high-temperature environments where thermal management is critical. | Choose SMCJ188AHE3_A/I if board space permits and thermal derating margin is insufficient with SMB footprint; otherwise SMBJ188AHE3_B/I optimizes density and cost. |
Compared with SMBJ188AHM3_B/I, the SMBJ188AHE3_B/I offers identical protection performance with standard RoHS compliance; versus SMCJ188AHE3_A/I, it trades 2.5× lower thermal resistance for 40 % smaller PCB area and lower assembly cost - ideal for space-constrained 48 V control modules.
Availability
SMBJ188AHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom remote radio units, and factory automation sensor hubs requiring stable component supply across extended product lifecycles.
Supply support for SMBJ188AHE3_B/I 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 validation.
The SMBJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering AEC-Q101-qualified, low-leakage, fast-response TVS solutions in compact SMB packages.
FAQ
What is the maximum clamping voltage of the SMBJ188AHE3_B/I under a 10/1000 µs surge?
The SMBJ188AHE3_B/I has a maximum clamping voltage (VC) of 328 V when subjected to a 2.0 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ188AHE3_B/I maintains this clamping performance consistently across its qualified operating temperature range.
Is the SMBJ188AHE3_B/I AEC-Q101 qualified?
Yes, the SMBJ188AHE3_B/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and documented in Vishay's ordering information table (page 3). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and surge endurance - validating its suitability for automotive power electronics such as engine control units and body control modules.
What does the "B/I" suffix indicate in SMBJ188AHE3_B/I?
The "B/I" suffix in SMBJ188AHE3_B/I specifies packaging configuration: "B" denotes tape-and-reel packaging per Vishay's internal revision coding, and "I" indicates 13-inch diameter reels containing 3200 units. This format supports automated SMT placement and aligns with standard J-STD-033 handling requirements for moisture-sensitive devices.
How does the SMBJ188AHE3_B/I differ from bidirectional variants like SMBJ188CA?
The SMBJ188AHE3_B/I is unidirectional, meaning it conducts only in reverse bias above VBR and requires correct polarity installation (cathode toward protected line). In contrast, SMBJ188CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The SMBJ188AHE3_B/I offers lower leakage and is preferred for DC rail protection, whereas SMBJ188CA suits AC-coupled or differential signal lines.
What is the thermal resistance of the SMBJ188AHE3_B/I, and how does it affect layout?
The SMBJ188AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces effective RθJA. For reliable operation at elevated ambient temperatures or repetitive surges, PCB layout must allocate sufficient copper area to maintain TJ ≤ 150 °C - especially critical in enclosed industrial enclosures.
SMBJ188AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ188AHE3_B/I FAQ
1.How can I place an order for SMBJ188AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188AHE3_B/I 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 SMBJ188AHE3_B/I reliable?
The price and inventory of SMBJ188AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ188AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188AHE3_B/I?
SMBJ188AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188AHE3_B/I 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 SMBJ188AHE3_B/I?
For technical support, including SMBJ188AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ188AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ188AHE3_B/I 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 SMBJ188AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ188AHE3_B/I?
All SMBJ188AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188AHE3_B/I, 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 SMBJ188AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ188AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188AHE3_B/I Tags
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