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Vishay General Semiconductor - Diodes Division SMCJ188AHE3/9AT
- Part No.:
- SMCJ188AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188AHE3/9AT.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,881
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Product details
Overview
SMCJ188AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 188 V standoff voltage (VWM), 209–231 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 µs. It clamps transients to ≤328 V at 4.6 A surge current and operates from –55 °C to +150 °C, used for protecting automotive power rails and industrial sensor interfaces against inductive switching surges.
For engineers reviewing the SMCJ188AHE3/9AT datasheet, SMCJ188AHE3/9AT pinout, SMCJ188AHE3/9AT application, or SMCJ188AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1.0 µA max reverse leakage at VWM, 75 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device functions as a clamping-type overvoltage protector, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to transients induced by load switching or ESD events.
Designed for unidirectional operation, SMCJ188AHE3/9AT features a cathode band marking and supports surge currents up to 4.6 A (IPPM) under standardized 10/1000 µs waveform conditions. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use, with matte tin-plated leads compliant to J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 209 V / 231 V - guaranteed breakdown range at 1.0 mA test current, defining turn-on threshold |
| VC @ IPPM | 328 V - clamped voltage during 4.6 A 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient power handling capability under standard waveform, critical for IEC 61000-4-5 compliance |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage ensures minimal standby power loss in high-impedance circuits |
| TJ max | +150 °C - extended junction temperature rating enables use in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance informs heatsinking requirements when operating near PD = 6.5 W limit |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; polarity indicated by cathode band on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides return path during clamping; must be routed with low-inductance trace to minimize voltage overshoot |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line | Receives transient energy from upstream rail; cathode connection determines clamping polarity relative to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring long-term reliability under thermal cycling |
| Glass passivated junction | Ensures consistent VBR stability across temperature and lifetime, reducing parameter drift in harsh environments |
| MSL Level 1 rating | Enables direct placement without baking; compatible with standard reflow profiles peaking at 260 °C |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for 12 V/24 V systems |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for safety-critical industrial and automotive assemblies |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Clamping TVS diode placed between power rail and ground, activated within nanoseconds of overvoltage event. Use Value: Limits voltage to ≤328 V during 4.6 A surge, preventing damage to MCU power inputs rated for 36 V absolute maximum. | Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional shunt protector on 0–10 V output line, absorbing coupling noise from adjacent motor drives. Use Value: Maintains signal integrity with only 1.0 µA leakage at 188 V standoff, avoiding DC offset errors in precision measurement paths. |
| Telecom Line Card Surge Suppression | Renewable Energy Inverter DC Link Protection |
Use Scenario: Front-end protection for PoE-powered base station controllers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input, coordinated with GDT and MOV stages in multi-stage architecture. Use Value: Delivers 1500 W peak power handling without degradation, meeting ITU-T K.20 and IEC 61000-4-5 Level 4 requirements. | Use Scenario: Overvoltage clamp on photovoltaic string combiner box DC bus operating up to 1000 V. IC Role / Device Role / Timing Role: Secondary protection element after fuse and pre-charge circuit, guarding inverter gate drivers from grid-switching spikes. Use Value: Withstands repeated 10/1000 µs surges up to 4.6 A while maintaining <0.1 %/°C VBR drift, ensuring long-term stability in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ188AHE3/9AT | Lower PPPM (400 W vs. 1500 W); same VWM/VBR; SMA package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics with lower surge exposure | Select when board area is critical and surge threat level is below IEC 61000-4-5 Level 2 |
| SMCJ188CAHE3/9AT | Bidirectional variant; identical VWM/VBR/PPPM but symmetrical clamping in both polarities | Required for AC-coupled lines or differential signal pairs where polarity reversal may occur | Choose only if bidirectional protection is mandated by signal architecture or safety standard |
Compared with SMAJ188AHE3/9AT and SMCJ188CAHE3/9AT, the SMCJ188AHE3/9AT offers optimal balance of high-power surge handling and unidirectional polarity for DC power rail protection-enabling robust 1500 W clamping without sacrificing AEC-Q101 qualification or thermal performance in automotive and industrial designs.
Availability
SMCJ188AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom line card designs requiring stable component supply and AEC-Q101-compliant transient protection.
Supply support for SMCJ188AHE3/9AT 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in demanding automotive, industrial, and telecom power systems where clamping accuracy and surge endurance are critical.
FAQ
What is the breakdown voltage range for SMCJ188AHE3/9AT?
The SMCJ188AHE3/9AT has a guaranteed breakdown voltage (VBR) range of 209 V to 231 V at 1.0 mA test current, measured per ANSI/IEEE C62.35 standards. This range defines the minimum and maximum voltage at which the device enters avalanche conduction, ensuring predictable clamping behavior across manufacturing lots and temperature extremes. The SMCJ188AHE3/9AT maintains this specification under specified test conditions and is validated per AEC-Q101 stress testing protocols.
Is SMCJ188AHE3/9AT suitable for automotive applications?
Yes, SMCJ188AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HE3. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and mechanical shock-to ensure reliability in engine control units, body electronics, and ADAS modules. The SMCJ188AHE3/9AT also meets MSL Level 1 and UL 94 V-0 flammability requirements, supporting compliance with ISO/TS 16949 and automotive safety standards.
What does the "HE3" suffix indicate in SMCJ188AHE3/9AT?
"HE3" denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade E3 variants. The SMCJ188AHE3/9AT uses halogen-free molding compound and matte tin-plated leads qualified to JESD 201 Class 2 whisker resistance. This suffix confirms that the SMCJ188AHE3/9AT meets automotive reliability requirements while maintaining full compatibility with lead-free reflow processes and automated SMT assembly lines.
How is thermal performance characterized for SMCJ188AHE3/9AT?
The SMCJ188AHE3/9AT 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 JEDEC standards. Its junction-to-lead resistance (RθJL) is 15 °C/W, indicating efficient heat transfer to PCB traces. These values define derating curves for continuous power dissipation (PD = 6.5 W at TA = 50 °C) and inform layout decisions-such as pad size and copper thickness-to maintain TJ ≤ 150 °C under sustained surge duty cycles.
Can SMCJ188AHE3/9AT be used in bidirectional configurations?
No, SMCJ188AHE3/9AT is strictly unidirectional, with polarity defined by the cathode band. For bidirectional protection, the functionally matched part is SMCJ188CAHE3/9AT, which provides symmetrical clamping in both directions and identical VWM/VBR/PPPM ratings. Using SMCJ188AHE3/9AT in reverse-biased AC applications would result in forward conduction and potential failure. Always verify polarity alignment in schematic capture and PCB layout for the SMCJ188AHE3/9AT.
SMCJ188AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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):
- 4.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ188AHE3/9AT FAQ
1.How can I place an order for SMCJ188AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188AHE3/9AT 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 SMCJ188AHE3/9AT reliable?
The price and inventory of SMCJ188AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ188AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188AHE3/9AT?
SMCJ188AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188AHE3/9AT 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 SMCJ188AHE3/9AT?
For technical support, including SMCJ188AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ188AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ188AHE3/9AT 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 SMCJ188AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ188AHE3/9AT?
All SMCJ188AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188AHE3/9AT, 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 SMCJ188AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ188AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188AHE3/9AT Tags
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