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Vishay General Semiconductor - Diodes Division SMCJ188CAHE3_A/H
- Part No.:
- SMCJ188CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CAHE3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,608
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Product details
Overview
SMCJ188CAHE3_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 188 V standoff voltage (VWM), 209–231 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) under 10/1000 µs waveform. It clamps transients to ≤328 V at 4.6 A peak pulse current and operates across –55 °C to +150 °C junction temperature, targeting automotive-grade ESD and lightning surge protection on power rails and signal lines.
For engineers reviewing the SMCJ188CAHE3_A/H datasheet, SMCJ188CAHE3_A/H pinout, SMCJ188CAHE3_A/H application, or SMCJ188CAHE3_A/H equivalent, this device is selected for robust bidirectional clamping in AEC-Q101-compliant systems where precise VWM tolerance, low leakage (<1 µA at VWM), and MSL Level 1 reflow compatibility are required.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to provide symmetrical clamping in both directions, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR over life and temperature, while the low incremental surge resistance supports fast energy dissipation during transient events.
The device is rated for 1500 W peak pulse power with a 10/1000 µs waveform and exhibits a maximum clamping voltage of 328 V at 4.6 A IPPM - critical for safeguarding downstream MOSFETs or ICs with 330 V absolute maximum ratings. Thermal resistance RθJA is 75 °C/W, requiring appropriate PCB copper area per Vishay's recommended 0.31" × 0.31" pad layout for full derating compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 200 V nominal DC bus protection. |
| VBR min/max | 209 V / 231 V at 1 mA - Confirmed breakdown range ensures predictable turn-on within 10% tolerance for consistent system-level surge response. |
| VC @ IPPM | 328 V at 4.6 A - Clamping voltage under full-rated 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; enables compliance with IEC 61000-4-5 Level 4 (4 kV/2 Ω) when properly mounted. |
| ID @ VWM | <1 µA - Reverse leakage at standoff voltage; minimizes standby power loss and avoids false triggering in high-impedance sensing nodes. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments and industrial enclosures. |
| 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 and reflow. |
Pinout & Package
SMCJ188CAHE3_A/H is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case, as conduction occurs symmetrically across both terminals. The device has no internal anode/cathode designation - both leads serve as interchangeable surge-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Surge Input/Output Node | Interchangeable connection point for bidirectional transient suppression; connects directly across protected line and return (e.g., CAN_H/CAN_L, RS-485 A/B, or DC+ / DC−). |
| Terminal 2 | Surge Input/Output Node | Electrically identical to Terminal 1; forms symmetrical clamping path with no directional bias requirement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Bidirectional clamping | Enables single-device protection of AC signals or differential buses (e.g., CAN, LIN, RS-485) without external polarity management or dual-diode configurations. |
| MSL Level 1 | Rated for peak reflow temperatures up to 260 °C - eliminates moisture sensitivity concerns and allows standard lead-free assembly without baking. |
| Glass passivated junction | Provides long-term stability of VBR and leakage performance across thermal cycling and humidity exposure, critical for 15-year automotive service life. |
| Low clamping ratio (VC/VBR) | 1.57 (328 V / 209 V) - indicates efficient energy diversion with minimal overvoltage overshoot during surge events. |
Applications
| Automotive Power Rail Protection | Industrial RS-485 Data Line Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 16750-2) and alternator-induced surges up to 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp transients before they reach DC-DC converters or microcontrollers. Use Value: Withstands 1500 W pulses and maintains <1 µA leakage at 188 V, ensuring no impact on sleep-mode current while providing fail-safe protection during ignition cycles. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation networks exposed to EFT bursts and ground potential differences. IC Role / Device Role / Timing Role: Placed differentially across A/B lines to suppress common-mode surges without distorting signal integrity or adding capacitance. Use Value: Symmetrical 328 V clamping limits differential overvoltage to safe levels for transceivers rated to ±35 V, preventing latch-up or permanent damage during cable hot-plug events. |
| Telecom AC Adapter Input Stage | Consumer Appliance Motor Drive Snubbing |
Use Scenario: Secondary-side surge suppression in universal-input AC/DC adapters subjected to lightning-induced surges on SELV outputs. IC Role / Device Role / Timing Role: Connected across output rails to absorb residual transients escaping primary-side MOVs and Y-capacitors. Use Value: 188 V VWM aligns with 24 V/48 V telecom output standards; 1500 W rating handles multiple IEC 61000-4-5 surges without degradation. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp back-EMF spikes generated during PWM commutation or abrupt shutdown. Use Value: Fast response time and low clamping voltage prevent MOSFET drain-source avalanche failure, extending power stage lifetime under repeated switching stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ188CA | Same VWM (188 V), identical SMC package, but rated for 400 W PPPM (vs. 1500 W); lower clamping voltage (300 V @ 4.6 A). | Suitable for lower-energy transients (IEC 61000-4-4 EFT only); not recommended for IEC 61000-4-5 Level 4 or automotive load dump. | Select when cost sensitivity outweighs surge energy requirement and board space permits parallel devices for higher power handling. |
| ON Semiconductor 1.5SMC188CA | Identical electrical specs (188 V VWM, 1500 W PPPM, 328 V VC), same SMC package, but AEC-Q101 qualification not documented in public datasheet. | Acceptable for industrial/commercial use; requires additional validation for automotive deployment due to missing AEC-Q101 evidence. | Choose if AEC-Q101 compliance is not mandatory and supply chain diversification is prioritized over certified qualification status. |
Compared with SMCJ188CAHE3_A/H, SMAJ188CA offers lower surge capacity but tighter clamping, while 1.5SMC188CA matches key ratings but lacks publicly verified AEC-Q101 certification - making SMCJ188CAHE3_A/H the preferred choice for automotive-grade designs requiring documented reliability assurance.
Availability
SMCJ188CAHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial communication interfaces, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for SMCJ188CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive qualification.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against repetitive surges and long-term parametric stability are essential.
FAQ
What is the maximum clamping voltage of SMCJ188CAHE3_A/H and under what test condition?
The maximum clamping voltage of SMCJ188CAHE3_A/H is 328 V, measured at a peak pulse current (IPPM) of 4.6 A using a 10/1000 µs double-exponential surge waveform. This value is specified in the Vishay datasheet (Document Number: 88394, Revision: 09-Jan-2024) and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. SMCJ188CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMCJ188CAHE3_A/H suitable for automotive applications?
Yes, SMCJ188CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use, as confirmed by the "HE3" suffix and documentation in the Vishay datasheet. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD qualification. SMCJ188CAHE3_A/H is deployed in engine control units, body control modules, and ADAS sensor interfaces where sustained reliability under thermal and electrical stress is mandatory.
Does SMCJ188CAHE3_A/H have polarity markings on the package?
No, SMCJ188CAHE3_A/H has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCJ188A), the CA version conducts identically in both directions and features no cathode band or other orientation indicators. Both terminals are functionally interchangeable, simplifying layout and eliminating risk of incorrect orientation during assembly.
What is the thermal resistance and recommended PCB layout for SMCJ188CAHE3_A/H?
The typical junction-to-ambient thermal resistance (RθJA) of SMCJ188CAHE3_A/H is 75 °C/W, measured on a standard 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. Vishay specifies this pad size in the datasheet as the minimum for achieving rated power dissipation. Reducing pad area increases thermal impedance and requires derating of PPPM; SMCJ188CAHE3_A/H must be mounted per these guidelines to sustain 1500 W surge capability without junction overheating.
How does the "HE3" suffix in SMCJ188CAHE3_A/H affect its compliance and packaging?
The "HE3" suffix in SMCJ188CAHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade "E3" variants. It is supplied in 7" plastic tape-and-reel format (package code H, base quantity 850), with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. SMCJ188CAHE3_A/H also meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability requirements for the molding compound.
SMCJ188CAHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ188CAHE3_A/H FAQ
1.How can I place an order for SMCJ188CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CAHE3_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 SMCJ188CAHE3_A/H reliable?
The price and inventory of SMCJ188CAHE3_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 SMCJ188CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ188CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CAHE3_A/H?
SMCJ188CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CAHE3_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 SMCJ188CAHE3_A/H?
For technical support, including SMCJ188CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ188CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ188CAHE3_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 SMCJ188CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ188CAHE3_A/H?
All SMCJ188CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CAHE3_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 SMCJ188CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ188CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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