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Vishay General Semiconductor - Diodes Division SMBJ188AHE3/5B
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- Part No.:
- SMBJ188AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188AHE3/5B.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,057
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Product details
Overview
SMBJ188AHE3/5B 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 (IPPM), and 600 W peak pulse power capability with a 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom infrastructure.
For engineers reviewing the SMBJ188AHE3/5B datasheet, SMBJ188AHE3/5B pinout, SMBJ188AHE3/5B application, or SMBJ188AHE3/5B 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 RoHS-compliant packaging details to support ESD/surge protection design validation and BOM selection.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches rapidly (<1 ns response time) to divert surge energy away from downstream ICs or MOSFETs. Its low incremental surge resistance ensures stable clamping under high-current transients, while the glass-passivated junction enhances reliability under repetitive stress.
The SMBJ188AHE3/5B is rated for 600 W peak pulse power (10/1000 µs), 5.0 W steady-state power dissipation at 50 °C, and 100 A non-repetitive forward surge current (8.3 ms half-sine). It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 - confirming suitability for automotive-grade power supply and sensor interface protection where long-term surge immunity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 209 V / 231 V at IT = 1 mA - guaranteed avalanche initiation window; defines minimum overvoltage threshold for protection activation. |
| VC @ IPPM | 328 V at IPPM = 2.0 A (10/1000 µs) - clamped voltage seen by protected circuit during worst-case surge; determines stress on downstream components. |
| PPPM | 600 W - peak transient power handling capacity; validates capability against IEC 61000-4-5 Level 4 surges (4 kV line-to-line). |
| TJ max. | +150 °C - maximum junction temperature; enables use in high-ambient environments like enclosed industrial enclosures or engine bays. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty cycles. |
| AEC-Q101 | Qualified - validated for automotive applications including powertrain control modules and body electronics requiring extended reliability and temperature cycling performance. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events (e.g., reverse polarity faults). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 188 V rail); avalanches into conduction when reverse voltage exceeds VBR to clamp transients. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity without derating on standard PCB layouts. |
| AEC-Q101 qualification | Validates long-term reliability for automotive power supply inputs and CAN/LIN bus protection in harsh thermal and vibration environments. |
| Glass passivated junction | Reduces leakage drift and improves stability over temperature and lifetime versus epoxy-passivated alternatives. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorning or delamination risks. |
| RoHS-compliant & halogen-free option available | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709C material restrictions for green electronics manufacturing. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of DC bus voltage sensing circuits against switching transients generated by IGBT gate drivers and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between high-side sense node and ground to clamp overshoots above 188 V. Use Value: Limits sensed voltage excursion to ≤328 V during 2.0 A surges, preserving ADC input integrity and preventing false overvoltage trips. |
Use Scenario: Input-stage surge suppression on –48 V telecom rectifier outputs exposed to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across output rails to absorb 600 W transients without degradation over 10⁵+ events. Use Value: Maintains system uptime by preventing latch-up or burnout in downstream DC/DC controllers during repeated 10/1000 µs surges. |
| Automotive Body Control Modules | Industrial PLC Analog Inputs |
|
Use Scenario: Protection of LIN bus transceiver power pins against load dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional TVS tied between VCC and GND to clamp spikes up to 328 V within <1 ns. Use Value: Ensures functional safety compliance (ISO 16750-2) by limiting voltage stress on transceiver ICs during 12 V system load dump events. |
Use Scenario: Guarding 4–20 mA current loop receiver inputs against ESD and field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: High-VWM TVS placed across input terminals to prevent damage during hot-plug or cable discharge events. Use Value: Enables uninterrupted analog measurement by clamping transients before they exceed the ±30 V absolute maximum rating of precision op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHM3/5B | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | Required where halogen-free compliance (IEC 61249-2-21) is mandated for PCB assembly or end-product environmental certification. | Select SMBJ188AHM3/5B when halogen-free materials are specified in your manufacturing or regulatory requirements. |
| SMCJ188AHE3/5B | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Better suited for higher-energy surges or thermally constrained designs needing lower junction temperature rise per watt. | Choose SMCJ188AHE3/5B only if 1500 W surge margin or improved thermal performance justifies larger footprint and layout change. |
Compared with SMBJ188AHE3/5B, SMBJ188AHM3/5B offers identical protection performance with halogen-free construction, while SMCJ188AHE3/5B trades compactness for higher surge capacity and better thermal dissipation - making SMBJ188AHE3/5B optimal for space-constrained, AEC-Q101-compliant 600 W protection needs.
Availability
SMBJ188AHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and PLC analog input protection requiring stable component supply and full traceability.
Supply support for SMBJ188AHE3/5B 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance across temperature, lifetime, and surge repetition rates.
FAQ
What is the maximum clamping voltage of SMBJ188AHE3/5B under a 10/1000 µs surge?
The SMBJ188AHE3/5B 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 IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMBJ188AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ188AHE3/5B qualified for automotive applications?
Yes, SMBJ188AHE3/5B is AEC-Q101 qualified, having passed stress tests including temperature cycling, humidity bias, and high-temperature operating life per the AEC-Q101 standard. This qualification confirms its suitability for automotive power supply, lighting, and body electronics applications where long-term reliability under thermal and mechanical stress is mandatory. The "HE3" suffix explicitly denotes AEC-Q101 compliance.
What does the "5B" in SMBJ188AHE3/5B indicate?
The "5B" in SMBJ188AHE3/5B specifies the packaging format: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This delivery mode supports high-volume automated SMT placement and is compatible with standard pick-and-place equipment. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "5B" governs physical logistics and handling.
How does SMBJ188AHE3/5B differ from bidirectional variants like SMBJ188CA?
SMBJ188AHE3/5B is unidirectional and features a cathode band marking; it conducts only in reverse breakdown and forward conduction, making it ideal for DC rail protection. In contrast, SMBJ188CA is bidirectional with no polarity marking and symmetrical clamping in both directions - used for AC lines or differential signal protection. Their VBR and VC values differ accordingly, and they are not interchangeable without circuit redesign.
What is the thermal resistance of SMBJ188AHE3/5B, and how does it affect layout?
The SMBJ188AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA, lowering junction temperature during repeated surges. For continuous 5.0 W dissipation, ambient must remain below ~50 °C unless enhanced cooling is applied.
SMBJ188AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 (SMBJ)
SMBJ188AHE3/5B FAQ
1.How can I place an order for SMBJ188AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188AHE3/5B 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 SMBJ188AHE3/5B reliable?
The price and inventory of SMBJ188AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ188AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188AHE3/5B?
SMBJ188AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188AHE3/5B 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 SMBJ188AHE3/5B?
For technical support, including SMBJ188AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188AHE3/5B requirements.
6.How does Aetrix verify that SMBJ188AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ188AHE3/5B 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 SMBJ188AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ188AHE3/5B?
All SMBJ188AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188AHE3/5B, 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 SMBJ188AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ188AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188AHE3/5B Tags
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