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Vishay General Semiconductor - Diodes Division SMCJ188CAHM3/I
- Part No.:
- SMCJ188CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CAHM3/I.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,202
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Product details
Overview
SMCJ188CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection of sensitive electronics. It features a 188 V stand-off voltage (VWM), 328 A peak pulse current (IPPM) at 10/1000 μs, 328 V clamping voltage (VC), and 1500 W peak pulse power (PPPM). It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive applications.
For engineers reviewing the SMCJ188CAHM3/I datasheet, SMCJ188CAHM3/I pinout, SMCJ188CAHM3/I application, or SMCJ188CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, 188 V working voltage tolerance, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification for harsh-environment reliability.
Technical Context
The SMCJ188CAHM3/I operates as a voltage-clamping device that remains non-conductive below its 188 V stand-off voltage (VWM) and rapidly transitions to low-impedance conduction above its breakdown voltage range (209–231 V at 1 mA). Its bidirectional symmetry enables protection of AC-coupled or differential signal lines without polarity constraints.
It delivers 1500 W peak pulse power handling per the standardized 10/1000 μs waveform, with clamping voltage limited to 328 V under full surge current. The device uses glass-passivated junction technology and meets MSL Level 1 per J-STD-020, supporting lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 209 V / 231 V at 1 mA - Confirmed breakdown threshold ensures reliable turn-on during transients |
| VC @ IPPM | 328 V - Clamped voltage under 328 A surge limits downstream IC stress to safe levels |
| PPPM | 1500 W - Peak surge energy absorption capacity per 10/1000 μs waveform |
| RθJA | 75 °C/W - Thermal resistance defines derating behavior above 25 °C ambient |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal interface |
Pinout & Package
SMCJ188CAHM3/I is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case, consistent with bidirectional functionality. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive overvoltage events |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current into device during negative overvoltage events; symmetric with Anode in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal paths without external polarity management |
| AEC-Q101 qualification | Validated reliability for automotive powertrain, body control, and ADAS modules exposed to thermal cycling and vibration |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements including JEDEC J-STD-20 and IEC 61249-2-21 |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1 rating | Supports standard SMT reflow profiles with peak temperature up to 260 °C without moisture-induced failure |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple transients per ISO 16750-2. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Withstands 1500 W surges and clamps to ≤328 V, preventing damage to downstream 36 V-rated regulators and CAN transceivers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC inputs against ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential or single-ended sensor lines. Use Value: Symmetric 188 V stand-off and 328 V clamping preserve signal integrity while suppressing ±1 kV EFT bursts per IEC 61000-4-4. |
| Telecom Data Line Surge Suppression | Consumer Power Adapter Input Stage |
Use Scenario: Shielding Ethernet PHY interfaces or RS-485 transceivers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line transient suppressor on line-side PCB traces before isolation transformers or common-mode chokes. Use Value: 328 A peak current rating handles 10/1000 μs surges up to 4 kV (line-to-ground), meeting ITU-T K.21 basic protection level. | Use Scenario: Input-stage overvoltage protection in universal-input AC/DC adapters subjected to mains transients (IEC 61000-4-5). IC Role / Device Role / Timing Role: Secondary surge clamp after MOV-based primary protection, absorbing residual energy. Use Value: 1500 W PPPM rating complements MOV coordination, reducing let-through voltage to <350 V for bridge rectifier and bulk capacitor safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHM3/I | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM and VBR range | Reduced surge margin; suitable only for lower-energy threats (e.g., ESD-only, not load dump) | Select when board space is constrained and surge threat level is classified as IEC 61000-4-2 Level 4 only |
| SMCJ188AHE3/I | Unidirectional version; identical VWM, VBR, PPPM, and package; includes cathode band marking | Requires polarity-aware layout; unsuitable for AC or floating signals | Choose only for DC-biased rails where reverse conduction must be blocked |
Compared with SMCJ188CAHM3/I, SMBJ188CAHM3/I offers footprint reduction at the cost of 60% lower surge power handling, while SMCJ188AHE3/I provides identical surge performance but lacks bidirectional symmetry-requiring careful polarity alignment in design.
Availability
SMCJ188CAHM3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, telecom line interface, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ188CAHM3/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom systems where robustness against ISO 7637, IEC 61000-4-5, and AEC-Q101 stress conditions is mandatory.
FAQ
What is the clamping voltage of SMCJ188CAHM3/I at its rated peak pulse current?
The SMCJ188CAHM3/I has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current (IPPM) of 328 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuitry downstream of the SMCJ188CAHM3/I.
Is SMCJ188CAHM3/I suitable for automotive applications?
Yes, SMCJ188CAHM3/I is AEC-Q101 qualified and specifically designed for automotive use. Its halogen-free construction, MSL Level 1 rating, and guaranteed operation from –55 °C to +150 °C junction temperature make it appropriate for engine control units, body electronics, and ADAS modules where reliability under thermal cycling and electrical stress is critical. The SMCJ188CAHM3/I meets ISO 16750-2 load dump requirements when properly mounted.
How does the bidirectional nature of SMCJ188CAHM3/I affect its PCB layout?
The SMCJ188CAHM3/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional variants, it requires no cathode band alignment-simplifying layout for AC-coupled lines, differential buses (e.g., RS-485), or floating grounds. This symmetry avoids reverse-installation risk and reduces assembly verification steps for the SMCJ188CAHM3/I.
What is the thermal resistance of SMCJ188CAHM3/I, and how does it impact power derating?
The SMCJ188CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal. This value determines its power derating curve: above 25 °C ambient, its 6.5 W steady-state dissipation must be linearly reduced by 86.7 mW/°C. Accurate thermal modeling using this RθJA ensures safe operation of the SMCJ188CAHM3/I in enclosed or high-temperature enclosures.
Does SMCJ188CAHM3/I meet RoHS and halogen-free compliance standards?
Yes, SMCJ188CAHM3/I carries the "HM3" suffix, indicating it is both RoHS-compliant and halogen-free per JEDEC J-STD-20 and IEC 61249-2-21. It contains no brominated flame retardants, chlorine, or fluorine above threshold limits, and its molding compound meets UL 94 V-0 flammability rating-making it suitable for environmentally regulated markets and green manufacturing programs requiring the SMCJ188CAHM3/I.
SMCJ188CAHM3/I 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:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ188CAHM3/I FAQ
1.How can I place an order for SMCJ188CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CAHM3/I 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 SMCJ188CAHM3/I reliable?
The price and inventory of SMCJ188CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ188CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CAHM3/I?
SMCJ188CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CAHM3/I 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 SMCJ188CAHM3/I?
For technical support, including SMCJ188CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CAHM3/I requirements.
6.How does Aetrix verify that SMCJ188CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ188CAHM3/I 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 SMCJ188CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ188CAHM3/I?
All SMCJ188CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CAHM3/I, 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 SMCJ188CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ188CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188CAHM3/I Tags
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