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Vishay General Semiconductor - Diodes Division SMCJ188CAHM3_A/H
- Part No.:
- SMCJ188CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CAHM3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,559
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Product details
Overview
SMCJ188CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 188 V standoff voltage (VWM), and clamping voltage of 328 V at 4.6 A peak pulse current. It protects sensitive signal lines and power rails in automotive sensor interfaces, industrial I/O modules, and telecom line cards against lightning-induced transients and inductive switching spikes.
For engineers reviewing the SMCJ188CAHM3_A/H datasheet, SMCJ188CAHM3_A/H pinout, SMCJ188CAHM3_A/H application, or SMCJ188CAHM3_A/H equivalent, this device is selected for robust bidirectional ESD/surge protection where AEC-Q101 qualification, low incremental surge resistance, and MSL Level 1 moisture sensitivity are required - especially in 12/24 V automotive subsystems and industrial fieldbus interfaces.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ns) to transient events per IEEE C62.35 standards.
Thermal design relies on low RθJL = 15 °C/W (junction-to-lead) and requires mounting on 8.0 mm × 8.0 mm copper pads per Vishay's recommended layout to sustain full 1500 W PPPM rating. The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC bias. |
| VBR min/max | 209 V / 231 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 328 V at 4.6 A (10/1000 μs) - Clamping voltage during worst-case surge; defines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing. |
| ID @ VWM | 1.0 μA - Reverse leakage at rated standoff; negligible loading on high-impedance sensor or communication lines. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated pick-and-place. |
Pinout & Package
SMCJ188CAHM3_A/H uses a 2-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional functionality. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band marking; enables placement without orientation check. |
| Case (body) | Thermal and mechanical interface | Exposed copper pad area required per datasheet fig. - critical for thermal dissipation and surge current path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., RS-485), and ungrounded systems without polarity constraints. |
| AEC-Q101 qualification | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock per stress test requirements. |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking - simplifies manufacturing for high-reliability production lines. |
| Glass-passivated junction | Ensures stable VBR over time and temperature; eliminates parameter drift seen in epoxy-passivated alternatives. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin. |
Applications
| Automotive Sensor Protection | Industrial Fieldbus Interface |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential pair or supply rail to shunt surge energy before it reaches PHY layer. Use Value: Maintains signal integrity during 12 V system surges up to 35 V and suppresses >1 kV transients without latch-up or degradation. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on twisted-pair data lines to absorb coupled inductive kickback. Use Value: Prevents permanent damage to transceiver ESD structures while preserving <10 pF capacitance impact on 10 Mbps signaling. |
| Telecom Line Card Surge Protection | Power Supply Input Stage |
Use Scenario: Front-end protection for PoE-powered Ethernet switches subjected to lightning-induced surges on Ethernet ports. IC Role / Device Role / Timing Role: Primary surge arrestor on 48 V DC input side of PD controller, coordinated with secondary TVS and fuse. Use Value: Absorbs 1500 W peak energy per IEC 61000-4-5, limiting voltage to ≤328 V and preventing upstream converter shutdown. |
Use Scenario: Input rail protection for 24 V industrial SMPS feeding programmable logic controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor input to clamp switching transients and back-EMF from adjacent relays. Use Value: Withstands repeated 10/1000 μs surges up to 4.6 A without parameter shift, ensuring long-term reliability in harsh electrical environments. |
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_A/H | Lower PPPM (600 W), same VWM (188 V), SMB package (smaller footprint, higher RθJA). | Restricted to lower-energy surges (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 Level 3+. | Select when board space is constrained and surge threat level is limited to sub-1 kV events. |
| SMCJ188AHE3_A/H | Unidirectional version; identical VWM, PPPM, and package; includes cathode band marking. | Requires polarity-aware layout; used only where DC bias direction is fixed and reverse conduction must be blocked. | Choose only for single-polarity rails (e.g., +12 V supply) where reverse leakage must be minimized below 1 μA. |
Compared with SMCJ188CAHM3_A/H, SMBJ188CAHM3_A/H trades surge capacity for compactness, while SMCJ188AHE3_A/H sacrifices bidirectionality for tighter reverse leakage control - making the original the optimal choice for general-purpose, polarity-agnostic 188 V surge protection.
Availability
SMCJ188CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial fieldbus nodes, telecom line cards, and 24 V power supply inputs requiring stable component supply with AEC-Q101 assurance and long-lifecycle support.
Supply support for SMCJ188CAHM3_A/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, 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 infrastructure where robustness, consistency, and qualification compliance are non-negotiable.
FAQ
What is the clamping voltage of SMCJ188CAHM3_A/H at its rated peak pulse current?
The SMCJ188CAHM3_A/H has a maximum clamping voltage (VC) of 328 V when subjected to its specified peak pulse current of 4.6 A using the standard 10/1000 μs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on protected circuitry during a full-rated surge event. The SMCJ188CAHM3_A/H maintains this clamping performance across its qualified operating temperature range.
Is SMCJ188CAHM3_A/H suitable for automotive applications?
Yes, SMCJ188CAHM3_A/H is AEC-Q101 qualified and specifically designed for automotive use, including under-hood environments. Its construction meets halogen-free, RoHS-compliant requirements, and it is rated for operation from –55 °C to +150 °C. The SMCJ188CAHM3_A/H is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where immunity to load dump and ISO 7637-2 transients is mandatory.
How does the bidirectional nature of SMCJ188CAHM3_A/H affect PCB layout?
The bidirectional design of SMCJ188CAHM3_A/H eliminates polarity constraints - there is no cathode band marking, and either terminal may connect to any node in a differential or AC-coupled path. This simplifies layout, reduces assembly errors, and allows flexible placement across signal pairs or supply rails. The SMCJ188CAHM3_A/H requires symmetric 8.0 mm × 8.0 mm copper pads per terminal for thermal and surge-current handling, as specified in Vishay's recommended mounting footprint.
What is the maximum reverse leakage current for SMCJ188CAHM3_A/H at its standoff voltage?
At its rated standoff voltage (VWM) of 188 V and ambient temperature of 25 °C, the SMCJ188CAHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA. This low leakage ensures minimal power loss and signal loading on high-impedance circuits such as sensor bridges or precision reference lines. The SMCJ188CAHM3_A/H maintains this specification across its full operating temperature range, with leakage increasing predictably per datasheet derating curves.
Does SMCJ188CAHM3_A/H require special handling or baking prior to reflow?
No - SMCJ188CAHM3_A/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be placed directly into reflow without pre-baking. Its moisture-sensitive level classification is confirmed by Vishay's qualification testing, and the SMCJ188CAHM3_A/H supports standard lead-free reflow profiles with peak temperatures up to 260 °C. This eliminates process overhead in high-volume manufacturing.
SMCJ188CAHM3_A/H 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:
- -
- 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_A/H FAQ
1.How can I place an order for SMCJ188CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CAHM3_A/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 SMCJ188CAHM3_A/H reliable?
The price and inventory of SMCJ188CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ188CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CAHM3_A/H?
SMCJ188CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CAHM3_A/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 SMCJ188CAHM3_A/H?
For technical support, including SMCJ188CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CAHM3_A/H requirements.
6.How does Aetrix verify that SMCJ188CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ188CAHM3_A/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 SMCJ188CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ188CAHM3_A/H?
All SMCJ188CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CAHM3_A/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 SMCJ188CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ188CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188CAHM3_A/H Tags
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