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Vishay General Semiconductor - Diodes Division SMCJ188A-E3/9AT
- Part No.:
- SMCJ188A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188A-E3/9AT.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,085
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Product details
Overview
SMCJ188A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 188 V stand-off voltage (VWM), 328 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps transients to 328 V at rated surge, housed in an SMC (DO-214AB) package with matte tin-plated leads. It is used to protect MOSFETs, IGBTs, and sensor interfaces in industrial motor drives and automotive power modules.
For engineers reviewing the SMCJ188A-E3/9AT datasheet, SMCJ188A-E3/9AT pinout, SMCJ188A-E3/9AT application, or SMCJ188A-E3/9AT equivalent, key selection criteria include clamping voltage (VC = 328 V), breakdown voltage range (209–231 V), unidirectional polarity, 1500 W peak pulse power rating, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The SMCJ188A-E3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its reverse stand-off voltage (VWM = 188 V), limiting transient overvoltages before they damage downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance across temperature.
With a thermal resistance of RθJA = 75 °C/W and RθJL = 15 °C/W, it supports reliable operation up to TJ = +150 °C when mounted on 8.0 mm × 8.0 mm copper pads per terminal. Its fast response time (<1.0 ps) and low incremental surge resistance enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR min/max | 209 V / 231 V - Breakdown occurs within this range at IT = 1.0 mA; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 328 V - Clamped voltage at 328 A peak pulse current (10/1000 µs); determines maximum stress seen by protected IC or transistor. |
| PPPM | 1500 W - Peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| ID @ VWM | ≤1.0 µA - Reverse leakage at rated stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMCJ188A-E3/9AT uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, cathode identified by a band on the body. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference in unidirectional TVS configuration. | Provides return path during clamping; must be routed with low-inductance trace to minimize voltage overshoot during surge events. |
| Cathode | Protected line connection; marked by band on package body. | Connected to the line being safeguarded (e.g., 188 V DC bus); conducts avalanche current to Anode when transient exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against high-energy transients per IEC 61000-4-5, reducing need for cascaded protection stages. |
| Clamping voltage ≤328 V at 328 A | Ensures protected MOSFETs or gate drivers remain below their absolute maximum VDS or VGS ratings during surge events. |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free PCB assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Delivers stable VBR and low leakage over lifetime and temperature, critical for long-term reliability in industrial deployments. |
| RoHS-compliant, halogen-free option available | Meets environmental compliance mandates for global OEMs while maintaining identical electrical performance. |
Applications
| Industrial Motor Drives | Automotive Power Modules |
|---|---|
|
Use Scenario: Protection of IGBT gate drivers and DC-link sensing circuits against voltage spikes from inductive load switching in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and IGBT gate, clamping negative-going transients induced by Miller effect or shoot-through. Use Value: Limits gate-source voltage to ≤328 V, preventing gate oxide rupture and ensuring >100,000-cycle reliability under repeated 1500 W surge stress. |
Use Scenario: Surge suppression on 12 V/24 V battery-fed control lines in engine control units (ECUs) and body control modules (BCMs). IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN/CAN power rails and sensor supply lines, absorbing load-dump and jump-start transients. Use Value: Withstands 188 V stand-off and clamps to 328 V, allowing downstream LDOs and microcontrollers to operate safely during ISO 7637-2 Pulse 5a (120 V, 100 ms) events. |
| Telecom Power Feeds | Renewable Energy Inverters |
|
Use Scenario: Input-stage protection for PoE-powered equipment and remote radio units exposed to lightning-induced surges on Ethernet or DC feed lines. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input, coordinated with upstream GDTs or MOVs to handle multi-kA threats. Use Value: 1500 W PPPM and 328 A IPPM allow coordination with secondary protection without thermal runaway, meeting GR-1089-CORE Level 3 requirements. |
Use Scenario: DC-link overvoltage suppression in solar string inverters where PV array transients couple into MPPT controller inputs and DC bus monitoring circuits. IC Role / Device Role / Timing Role: Unidirectional clamp on 600–1000 V DC bus sense lines, referenced to local ground to avoid common-mode failure modes. Use Value: 209–231 V VBR range ensures precise triggering above nominal bus ripple, minimizing false clamping while guaranteeing response before 328 V threshold is breached. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188A-E3/52T | Same VWM (188 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for high-current motor drive snubbing. | Select when board space is constrained and surge threat level is ≤600 W; verify thermal derating at TJ > 100 °C. |
| SMCJ188CA-E3/9AT | Bidirectional variant; identical VWM (188 V), VC (328 V), and PPPM (1500 W), but symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN FD) where polarity reversal may occur. | Choose only if bidirectional protection is mandated; unidirectional SMCJ188A-E3/9AT offers lower cost and simpler grounding in DC systems. |
Compared with SMBJ188A-E3/52T, the SMCJ188A-E3/9AT delivers 2.5× higher surge power handling and superior thermal performance, making it suitable for demanding industrial and automotive applications; versus SMCJ188CA-E3/9AT, it provides optimized cost and layout simplicity for grounded DC rail protection where polarity is fixed.
Availability
SMCJ188A-E3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, automotive power modules, telecom power feeds, and renewable energy inverters requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ188A-E3/9AT 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 SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against repetitive surge stress is mandatory.
FAQ
What is the clamping voltage of the SMCJ188A-E3/9AT at its rated peak pulse current?
The SMCJ188A-E3/9AT clamps to a maximum of 328 V when subjected to its rated peak pulse current of 328 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream components in the protected circuit.
Is the SMCJ188A-E3/9AT RoHS-compliant and lead-free?
Yes, the SMCJ188A-E3/9AT carries the "E3" suffix, indicating full RoHS compliance and lead-free construction per EU Directive 2011/65/EU. The matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the device passes JESD 201 Class 2 whisker testing.
Can the SMCJ188A-E3/9AT be used in automotive applications?
The base SMCJ188A-E3/9AT is commercial-grade, but Vishay offers AEC-Q101 qualified versions under ordering codes like SMCJ188AHE3_A/I. For automotive use, specify the HE3 or HM3 suffix to ensure qualification to AEC-Q101 stress tests including temperature cycling, HTRB, and ESD, while retaining identical electrical specs as the SMCJ188A-E3/9AT.
What is the thermal resistance of the SMCJ188A-E3/9AT, and how does it affect PCB layout?
The SMCJ188A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under full 1500 W surge, designers must provide adequate copper area and consider airflow or heatsinking-reducing pad size increases RθJA and risks thermal failure during repetitive surges.
How does the SMCJ188A-E3/9AT differ from the SMCJ188CA-E3/9AT?
The SMCJ188A-E3/9AT is unidirectional with cathode marking and protects against positive transients only, while the SMCJ188CA-E3/9AT is bidirectional with no polarity marking and suppresses surges of either polarity. Both share identical VWM (188 V), VC (328 V), and PPPM (1500 W), but the CA version is required for AC or floating differential lines such as CAN or RS-485.
SMCJ188A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 4.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ188A-E3/9AT FAQ
1.How can I place an order for SMCJ188A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188A-E3/9AT 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 SMCJ188A-E3/9AT reliable?
The price and inventory of SMCJ188A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ188A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188A-E3/9AT?
SMCJ188A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188A-E3/9AT 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 SMCJ188A-E3/9AT?
For technical support, including SMCJ188A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ188A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ188A-E3/9AT 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 SMCJ188A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ188A-E3/9AT?
All SMCJ188A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188A-E3/9AT, 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 SMCJ188A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ188A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188A-E3/9AT Tags
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