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Vishay General Semiconductor - Diodes Division SMBJ188AHE3_B/H
- Part No.:
- SMBJ188AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188AHE3_B/H.pdf
- Description:
- 600W,188V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,700
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Product details
Overview
SMBJ188AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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, and 600 W peak pulse power dissipation with a 10/1000 µs waveform - deployed in industrial power supplies and automotive ECUs to safeguard MOSFETs and microcontrollers against inductive switching transients.
For engineers reviewing the SMBJ188AHE3_B/H datasheet, SMBJ188AHE3_B/H pinout, SMBJ188AHE3_B/H application, or SMBJ188AHE3_B/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and packaging details for production-grade ESD and surge protection design-in.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior under transient stress. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of high-energy transients induced by inductive load switching or lightning surges on DC power rails and signal lines.
The SMBJ188AHE3_B/H is rated for 5.0 W steady-state power dissipation at TA = 50 °C and supports repetitive surge duty cycles up to 0.01 %, with derating above 25 °C per Figure 2. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive applications - confirmed by the "HE3" suffix and ordering code "B/H" denoting 7" tape-and-reel delivery with RoHS-compliant, AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V/48 V industrial systems. |
| VBR (min/max) | 209–231 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 328 V at 2.0 A (10/1000 µs) - Clamping voltage limits downstream IC stress; enables protection of 300 V-rated components. |
| PPPM | 600 W - Peak pulse power handling capacity for transient suppression in harsh environments like motor drives and telecom power. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance determines required PCB copper area (0.2" × 0.2") for thermal management under sustained surge conditions. |
| TJ Range | −55 to +150 °C - Full automotive-grade operating and storage temperature range validated per AEC-Q101 requirements. |
| Leakage ID | 1.0 µA max at VWM - Ultra-low reverse leakage preserves system efficiency and prevents false triggering in high-impedance circuits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by a band on the body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line (e.g., +VIN); conducts surge current to ground when VIN exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and ECU applications with extended temperature cycling and humidity testing. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil de-energization or load dump without degradation. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress and thermal cycling. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces downstream. |
Applications
| Industrial Motor Drives | Automotive Power Distribution Units |
|---|---|
|
Use Scenario: Protection of gate drivers and bus voltage sensing circuits against inductive kickback from brushed DC motors. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive transients on 24 V supply rails during motor commutation. Use Value: Limits voltage excursion to ≤328 V, preventing latch-up or permanent damage to 40 V-rated MOSFETs and op-amps. |
Use Scenario: Surge suppression on fused battery feed lines in PDU modules exposed to ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role / Timing Role: Primary front-end transient suppressor placed upstream of DC-DC converters and CAN transceivers. Use Value: Withstands 600 W pulses while maintaining <1 µA leakage at 188 V - preserving sleep-mode current budgets. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control Boards |
|
Use Scenario: Overvoltage hardening of -48 V telecom rectifier outputs subjected to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS on input stage to absorb differential-mode transients before they reach PMICs and FPGAs. Use Value: 328 V clamping voltage allows safe operation with 300 V-rated secondary-side components and avoids cascaded failure. |
Use Scenario: Protection of isolated gate drive signals and auxiliary 12 V control rails in solar string inverters operating in high-lightning-risk regions. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated DC bias supplies feeding optocouplers and bootstrap circuits. Use Value: AEC-Q101 qualification ensures reliability across −40 to +125 °C ambient, matching inverter thermal profiles. |
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/H | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs but different material composition. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ188AHM3_B/H if halogen-free materials are required; otherwise SMBJ188AHE3_B/H satisfies standard RoHS and AEC-Q101 needs. |
| SMCJ188AHE3_A/H | Larger SMC (DO-214AB) package with higher RθJA (65 °C/W), same VWM/VC, but 1500 W PPPM. | Used where higher surge energy absorption is needed and PCB space permits larger footprint. | Select SMCJ188AHE3_A/H only when >600 W pulse handling is required; SMBJ188AHE3_B/H offers optimal size/power balance for space-constrained designs. |
Compared with SMBJ188AHM3_B/H, the SMBJ188AHE3_B/H provides identical surge performance with standard RoHS compliance; versus SMCJ188AHE3_A/H, it trades 900 W lower pulse rating for 40 % smaller PCB area and compatibility with fine-pitch automated placement.
Availability
SMBJ188AHE3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution units, and telecom DC power feeds requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ188AHE3_B/H 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability under surge stress are mandatory.
FAQ
What is the clamping voltage of SMBJ188AHE3_B/H at its rated peak pulse current?
The SMBJ188AHE3_B/H has a maximum clamping voltage (VC) of 328 V at 2.0 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings. The SMBJ188AHE3_B/H achieves this clamping performance while maintaining low leakage and stable breakdown characteristics across temperature.
Is SMBJ188AHE3_B/H qualified for automotive applications?
Yes, SMBJ188AHE3_B/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers temperature cycling, humidity testing, and mechanical stress validation required for under-hood and ECU use. The SMBJ188AHE3_B/H is specifically intended for automotive power distribution, body control modules, and ADAS subsystems where transient immunity and long-term reliability are essential.
What does the "B/H" suffix mean in SMBJ188AHE3_B/H?
The "B/H" suffix in SMBJ188AHE3_B/H indicates packaging configuration: "B" denotes the product revision level, and "H" specifies the preferred package code for 7-inch diameter plastic tape-and-reel delivery with 750 units per reel. This format aligns with Vishay's ordering nomenclature and ensures compatibility with standard SMT pick-and-place equipment. The SMBJ188AHE3_B/H is supplied in this configuration with full traceability and AEC-Q101 certification documented per lot.
How does SMBJ188AHE3_B/H differ from bidirectional variants like SMBJ188CA?
The SMBJ188AHE3_B/H is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where surge polarity is known (e.g., +VIN to GND). In contrast, SMBJ188CA is bidirectional, offering symmetrical clamping for AC or floating signal lines - but with no polarity marking and double the leakage current specification at VWM. The SMBJ188AHE3_B/H provides tighter leakage (<1.0 µA) and optimized forward conduction for DC-centric applications, making it unsuitable as a drop-in replacement for bidirectional use cases.
What PCB layout guidance applies to SMBJ188AHE3_B/H for optimal thermal performance?
Vishay specifies mounting SMBJ188AHE3_B/H on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated RθJA of 100 °C/W. Minimizing trace length between the SMBJ188AHE3_B/H and ground plane reduces inductance and improves clamping speed. Thermal vias under pads enhance heat dissipation in multi-layer boards. Deviation from this layout increases junction temperature rise during surge events - potentially reducing lifetime or causing thermal runaway under repetitive stress.
SMBJ188AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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/H FAQ
1.How can I place an order for SMBJ188AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188AHE3_B/H 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/H reliable?
The price and inventory of SMBJ188AHE3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ188AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188AHE3_B/H?
SMBJ188AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188AHE3_B/H 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/H?
For technical support, including SMBJ188AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ188AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188AHE3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ188AHE3_B/H?
All SMBJ188AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188AHE3_B/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ188AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188AHE3_B/H Tags
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