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Vishay General Semiconductor - Diodes Division SMBJ188AHM3_B/H
- Part No.:
- SMBJ188AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188AHM3_B/H.pdf
- Description:
- 600W,188V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,503
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Product details
Overview
SMBJ188AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against high-energy transients such as inductive load switching and lightning-induced surges. 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.
For engineers reviewing the SMBJ188AHM3_B/H datasheet, SMBJ188AHM3_B/H pinout, SMBJ188AHM3_B/H application, or SMBJ188AHM3_B/H equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in industrial motor drives, telecom power supplies, and automotive ECUs where high clamping ratio and AEC-Q101 qualification are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified breakdown range (209–231 V). Its low incremental surge resistance ensures minimal voltage overshoot during transient events, while its fast response time (<1 ns) enables effective suppression of ESD and surge pulses before downstream components are damaged.
The SMBJ188AHM3_B/H is halogen-free and RoHS-compliant (HM3 suffix), qualified to AEC-Q101 for automotive use, and rated for operation from –55 °C to +150 °C junction temperature. It is mounted on standard 0.2" × 0.2" copper pads and meets MSL Level 1 per J-STD-020 with a 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 209–231 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on above nominal system voltage. |
| VC (Clamping Voltage) | 328 V at IPPM = 2.0 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability under standardized 10/1000 µs transient; validates protection level per IEC 61000-4-5. |
| IFSM (Surge Current) | 100 A - Single half-sine 8.3 ms forward surge rating; supports inrush and fault-current resilience in power supply inputs. |
| TJmax | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked with cathode band on the body end.
| 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 | Avalanche clamping terminal | Connected to protected line (e.g., 188 V DC rail); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated energy absorption capacity for IEC 61000-4-5 Level 3/4 surge immunity in industrial power inputs. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive under-hood applications including engine control modules and battery management systems. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEMs and industrial equipment without compromising thermal performance. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, reducing stress on MOSFETs and gate drivers. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure risk. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of 180–200 V DC bus lines in variable-frequency drives against switching transients from IGBT commutation. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across DC link capacitor to limit voltage spikes to ≤328 V during fault conditions. Use Value: Prevents overvoltage damage to gate drivers and current-sense amplifiers by clamping within 1 ns and sustaining 600 W surge energy. |
Use Scenario: Input-stage surge protection on 48 V or 54 V telecom rectifier outputs exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, coordinated with upstream MOVs and filters. Use Value: Maintains system uptime by absorbing 10/1000 µs surges up to 2.0 A without degradation, validated per GR-1089-CORE. |
| Automotive Body Control Modules | Industrial PLC I/O Modules |
|
Use Scenario: Protection of LIN bus power rails and microcontroller VDD inputs in BCMs subjected to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between 12 V supply and ground, leveraging AEC-Q101 qualification for automotive reliability. Use Value: Survives 12 V system load-dump pulses (ISO 7637-2 Pulse 5a) with no parameter shift after 1000 cycles due to stable silicon junction. |
Use Scenario: Field-side protection on 24 V digital input channels of programmable logic controllers interfacing with solenoids and sensors. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 188 V) used on isolated 24 V auxiliary rails feeding optocoupler bias supplies. Use Value: Enables >100 kV ESD immunity (IEC 61000-4-2) and 1 kV surge immunity (IEC 61000-4-5) without leakage-induced false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHE3_B/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred for commercial-grade industrial designs where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement and automotive qualification is still needed. |
| SMBJ180A-HM3 | Lower VWM = 180 V, VBR = 200–221 V, VC = 317 V; otherwise identical package, power, and qualification. | Suitable for 170–185 V nominal rails where tighter clamping margin is required. | Choose when system nominal voltage is closer to 180 V and margin below 188 V improves noise immunity. |
Compared with SMBJ188AHM3_B/H, the HE3 variant trades halogen-free construction for slightly lower cost while retaining AEC-Q101, whereas the SMBJ180A-HM3 offers reduced standoff and clamping for tighter voltage margins-both require validation of VWM headroom in the target application.
Availability
SMBJ188AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for SMBJ188AHM3_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, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and application-specific qualification.
The SMBJ series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability under thermal cycling are mandatory.
FAQ
What is the clamping voltage of SMBJ188AHM3_B/H at its rated peak pulse current?
The SMBJ188AHM3_B/H has a maximum clamping voltage (VC) of 328 V at a peak pulse current (IPPM) of 2.0 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMBJ188AHM3_B/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) without derating.
Is SMBJ188AHM3_B/H suitable for automotive applications?
Yes, SMBJ188AHM3_B/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for automotive under-hood and chassis applications including body control modules, battery management systems, and ADAS power domains. Its 150 °C junction rating and validated surge endurance support ISO 7637-2 and ISO 16750-2 compliance when properly mounted.
What does the "HM3" suffix indicate in SMBJ188AHM3_B/H?
The "HM3" suffix in SMBJ188AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from the "HE3" (RoHS-compliant, AEC-Q101, but not halogen-free) and standard "E3/M3" (commercial grade only) versions. The "B/H" indicates packaging in 7" tape-and-reel format with 750 units per reel.
How does SMBJ188AHM3_B/H compare to bidirectional TVS diodes like SMBJ188CA?
SMBJ188AHM3_B/H is unidirectional and intended for DC line protection where polarity is fixed, offering lower leakage and higher surge current capability in the forward direction. In contrast, SMBJ188CA is bidirectional and suited for AC or floating signal lines. The SMBJ188AHM3_B/H cannot replace SMBJ188CA in AC-coupled applications due to its inherent polarity dependence and lack of symmetrical clamping.
What is the thermal resistance of SMBJ188AHM3_B/H from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ188AHM3_B/H is 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes natural convection and is critical for calculating junction temperature rise under sustained power dissipation (e.g., during repetitive surges or elevated ambient conditions).
SMBJ188AHM3_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)
SMBJ188AHM3_B/H FAQ
1.How can I place an order for SMBJ188AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188AHM3_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 SMBJ188AHM3_B/H reliable?
The price and inventory of SMBJ188AHM3_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 SMBJ188AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ188AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188AHM3_B/H?
SMBJ188AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188AHM3_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 SMBJ188AHM3_B/H?
For technical support, including SMBJ188AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ188AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188AHM3_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 SMBJ188AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ188AHM3_B/H?
All SMBJ188AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188AHM3_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 SMBJ188AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ188AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188AHM3_B/H Tags
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