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Vishay General Semiconductor - Diodes Division SMCJ188CAHM3/H
- Part No.:
- SMCJ188CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CAHM3/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,237
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Product details
Overview
SMCJ188CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 188 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), and 328 A peak pulse current (IPPM) under 10/1000 µs waveform. It protects sensitive signal lines and power rails in automotive sensor interfaces and industrial control systems against inductive switching transients.
For engineers reviewing the SMCJ188CAHM3/H datasheet, SMCJ188CAHM3/H pinout, SMCJ188CAHM3/H application, or SMCJ188CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) for surface-mount reliability in high-temperature environments.
Technical Context
The SMCJ188CAHM3/H operates as a voltage-clamping device that enters avalanche breakdown when reverse voltage exceeds its 209–231 V breakdown range (VBR at IT = 1 mA), limiting transient-induced overvoltage to ≤328 V (VC at IPPM). Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-dependent layout constraints.
Constructed with glass-passivated junctions and mounted on 8.0 mm × 8.0 mm copper pads, it delivers low incremental surge resistance and fast response time (<1 ns), meeting MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
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 - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 328 V - Clamped voltage during 1500 W surge, limiting downstream voltage stress |
| PPPM | 1500 W - Peak transient energy absorption capability with 10/1000 µs waveform |
| ID @ VWM | 1.0 µA - Low leakage ensures minimal standby power loss and signal integrity |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient, critical for power derating above 25 °C |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking; case dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional operation | Shared terminal for symmetrical clamping-no cathode band marking required |
| Cathode | Current exit terminal in forward bias; common node in bidirectional operation | Electrically identical to Anode in bidirectional mode; terminals interchangeable for layout flexibility |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for modern automotive and industrial PCB assembly |
| Low RθJL = 15 °C/W | Enables efficient heat transfer from junction to PCB copper, supporting sustained surge handling |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture sensitivity concerns |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical automotive and industrial applications |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus signal lines and analog sensor inputs (e.g., pressure, temperature) from load-dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector interface to shunt transients before reaching signal conditioning ICs. Use Value: With 328 V clamping at 1500 W, it prevents latch-up or damage to 5 V or 12 V rail-connected microcontrollers and ADCs during ISO 7637-2 Pulse 5a surges. | Use Scenario: Safeguarding digital input/output channels of programmable logic controllers exposed to motor drive noise and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS installed across isolated 24 V DC input terminals to clamp induced spikes up to 1 kV. Use Value: 188 V VWM allows compatibility with 24 V industrial systems while maintaining margin against normal operating transients and ensuring long-term reliability. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding PoE-powered Ethernet switch ports and base station power supplies from lightning-induced surges on AC/DC front-ends. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC distribution rail upstream of DC/DC converters and PMICs. Use Value: 1500 W PPPM rating enables survival of IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) surges up to 4 kV without degradation. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-motor TVS connected between terminals to absorb inductive kickback during MOSFET/FET switching. Use Value: Bidirectional symmetry eliminates need for orientation verification during automated placement, reducing manufacturing error rate in high-volume appliance production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHM3 | Lower PPPM (600 W), same VWM and VBR range, SMB (DO-214AA) package (smaller footprint) | Reduced surge capacity limits use to lower-energy transients; suitable for space-constrained consumer electronics | Select when board area is constrained and surge threat level is below 600 W |
| SMCJ188CAHE3 | Same electrical specs but commercial-grade (non-AEC-Q101), RoHS-compliant E3 suffix (not halogen-free) | Lacks automotive qualification and halogen-free certification; acceptable for industrial/commercial non-automotive use | Select when AEC-Q101 and halogen-free requirements are not mandated |
Compared with SMCJ188CAHM3/H, SMBJ188CAHM3 trades surge robustness for compactness, while SMCJ188CAHE3 retains full electrical performance but omits automotive qualification and halogen-free compliance-making SMCJ188CAHM3/H the sole choice for AEC-Q101-compliant, environmentally regulated automotive designs.
Availability
SMCJ188CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rails, and consumer appliance motor controls requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ188CAHM3/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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robust overvoltage protection and AEC-Q101 validation are mandatory.
FAQ
What does the "HM3" suffix indicate for SMCJ188CAHM3/H?
The HM3 suffix on SMCJ188CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards and environmental regulations, distinguishing it from commercial-grade variants like SMCJ188CAE3. This makes SMCJ188CAHM3/H suitable for under-hood and safety-critical automotive applications where material content and qualification are strictly controlled.
Is SMCJ188CAHM3/H unidirectional or bidirectional?
SMCJ188CAHM3/H is a bidirectional transient voltage suppressor, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping in both polarities with identical VBR (209–231 V), VC (328 V), and IPPM (328 A) characteristics-eliminating polarity marking and enabling flexible PCB layout without orientation dependency.
What is the maximum clamping voltage of SMCJ188CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SMCJ188CAHM3/H is 328 V at its rated peak pulse current (IPPM) of 328 A, tested with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-power transient event, ensuring downstream components rated for ≤350 V withstand the surge without failure.
Can SMCJ188CAHM3/H be used in place of a unidirectional TVS like SMCJ188A?
No-SMCJ188CAHM3/H is bidirectional and cannot replace unidirectional SMCJ188A in circuits requiring forward conduction or polarity-sensitive clamping. While both share VWM (188 V) and PPPM (1500 W), SMCJ188A has a defined cathode band and conducts forward current, whereas SMCJ188CAHM3/H blocks in both directions until breakdown. Substitution requires verifying circuit topology and transient polarity requirements.
What PCB pad layout is recommended for optimal thermal performance of SMCJ188CAHM3/H?
Vishay specifies mounting SMCJ188CAHM3/H on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal derating. This layout minimizes thermal resistance (RθJA = 75 °C/W) and supports reliable operation at elevated ambient temperatures. Smaller pads reduce surge capability and accelerate junction temperature rise, risking premature failure during repetitive transients.
SMCJ188CAHM3/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:
- 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/H FAQ
1.How can I place an order for SMCJ188CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CAHM3/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/H reliable?
The price and inventory of SMCJ188CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMCJ188CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CAHM3/H?
SMCJ188CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CAHM3/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/H?
For technical support, including SMCJ188CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CAHM3/H requirements.
6.How does Aetrix verify that SMCJ188CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ188CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMCJ188CAHM3/H?
All SMCJ188CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CAHM3/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/H part is unused and in its original packaging.
Return procedure for SMCJ188CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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