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Vishay General Semiconductor - Diodes Division SMCJ188AHM3/H
- Part No.:
- SMCJ188AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188AHM3/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,690
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Product details
Overview
SMCJ188AHM3/H 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), 1500 W peak pulse power (PPPM), and 4.6 A peak pulse current (IPPM) at 10/1000 µs waveform-designed for robust overvoltage protection of DC power rails and signal lines in industrial motor drives.
For engineers reviewing the SMCJ188AHM3/H datasheet, SMCJ188AHM3/H pinout, SMCJ188AHM3/H application, or SMCJ188AHM3/H equivalent, key selection criteria include clamping voltage (VC = 328 V), low incremental surge resistance, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under standard PCB pad layout.
Technical Context
This TVS diode operates as a unidirectional clamping device, triggered when reverse voltage exceeds its VBR range (209–231 V), limiting transient energy via avalanche breakdown. It features glass-passivated junction, low-profile SMC package, and meets MSL level 1 per J-STD-020 with 260 °C reflow peak.
Designed for single-pulse transients (e.g., inductive switching, ESD, lightning surges), it delivers fast response time (<1 ns), low clamping ratio (VC/VBR ≈ 1.42), and stable temperature coefficient of VBR (0.108 %/°C). Polarity is marked by cathode band; no marking on bidirectional variants.
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 - verified breakdown threshold at 1 mA test current; defines turn-on window |
| VC @ IPPM | 328 V - clamped voltage during 4.6 A 10/1000 µs surge; determines protected circuit stress level |
| PPPM | 1500 W - peak transient power handling capability under standardized waveform |
| ID @ VWM | 1.0 µA - leakage current at full standoff voltage; ensures minimal standby power loss |
| TJ max | +150 °C - maximum junction temperature; supports operation in high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance to ambient on standard 8 mm × 8 mm copper pads; guides heatsinking needs |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., +188 V rail); band-marked end absorbs positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC J-STD-201 Class 2 whisker resistance and environmental regulations |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio ~1.42) and reduced let-through energy during fast transients |
| MSL Level 1 rating | Allows unlimited floor life and standard 260 °C reflow without moisture sensitivity concerns |
| Glass passivated junction | Improves long-term stability and reduces parameter drift under thermal and electrical stress |
Applications
| Industrial Motor Drives | Automotive Power Modules |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC-link sensing circuits against switching-induced voltage spikes. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across DC bus or gate resistor network to limit transient overvoltage. Use Value: With VC = 328 V and VWM = 188 V, it safeguards 200 V-rated components while maintaining margin against normal operating ripple. | Use Scenario: Surge suppression on 12 V/24 V battery-fed control inputs in engine control units (ECUs) and body controllers. IC Role / Device Role / Timing Role: Standoff protection element connected between supply rail and ground, activated only during load-dump or ISO 7637-2 Pulse 5a events. Use Value: AEC-Q101 qualification and 1500 W PPPM ensure compliance with automotive transient immunity requirements without derating. |
| Telecom Power Supplies | Renewable Energy Inverters |
Use Scenario: Input-stage protection of AC/DC front-end converters exposed to lightning-induced surges on primary-side rectifier outputs. IC Role / Device Role / Timing Role: Primary-side TVS mounted across bulk capacitor terminals to clamp fast-rising common-mode transients. Use Value: 328 V clamping voltage allows safe operation with 300 VDC nominal input designs while meeting IEC 61000-4-5 Level 4 immunity. | Use Scenario: DC-link overvoltage suppression in solar string inverters where PV array open-circuit voltage can reach 1000 V+. IC Role / Device Role / Timing Role: Secondary-level TVS used in auxiliary bias supply protection, guarding isolated gate drivers and MCU power rails. Use Value: Halogen-free HM3 construction supports sustainability requirements; 150 °C TJ max enables deployment near heat-generating power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHM3 | Lower PPPM (600 W), same VWM/VBR, SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for 1500 W surge events | Select only if system-level testing confirms 600 W clamping suffices and space constraints favor SMB size |
| SMCJ188AHE3 | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free or AEC-Q101 qualification | Not approved for automotive use; lacks whisker resistance certification per JESD 201 Class 2 | Prefer for cost-sensitive industrial applications where AEC-Q101 and halogen-free are not mandated |
Compared with SMCJ188AHM3/H, SMBJ188AHM3 offers smaller size but reduced surge capacity, while SMCJ188AHE3 matches performance but omits automotive qualification and halogen-free assurance-making SMCJ188AHM3/H the optimal choice for safety-critical, high-reliability deployments.
Availability
SMCJ188AHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive power modules, and telecom power supplies requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMCJ188AHM3/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 part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and renewable energy systems-where consistent clamping performance and long-term stability are critical.
FAQ
What is the clamping voltage of SMCJ188AHM3/H under a 10/1000 µs surge?
The SMCJ188AHM3/H has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current (IPPM = 4.6 A) using the standard 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMCJ188AHM3/H qualified for automotive applications?
Yes, SMCJ188AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet revision 09-Jan-2024. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD, making SMCJ188AHM3/H suitable for use in automotive power modules, ECUs, and ADAS subsystems where reliability under thermal and electrical stress is mandatory.
What does the "HM3" suffix indicate for SMCJ188AHM3/H?
The "HM3" suffix in SMCJ188AHM3/H denotes halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance, and AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3 versions and confirms compliance with automotive and green manufacturing standards-critical for Tier 1 suppliers and sustainability-driven design programs.
How does the thermal resistance of SMCJ188AHM3/H affect PCB layout?
The SMCJ188AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under full-power surge duty, designers must ensure adequate copper area and avoid excessive local heating-especially important in compact industrial inverters where multiple SMCJ188AHM3/H devices may operate in proximity.
Can SMCJ188AHM3/H be used in bidirectional configurations?
No, SMCJ188AHM3/H is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and cathode band marking. For bidirectional protection, Vishay specifies the SMCJ188CA family variant. Using SMCJ188AHM3/H in reverse-biased AC applications would result in forward conduction and potential failure; always match device polarity to circuit topology and transient directionality.
SMCJ188AHM3/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:
- 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:
- 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)
SMCJ188AHM3/H FAQ
1.How can I place an order for SMCJ188AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188AHM3/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 SMCJ188AHM3/H reliable?
The price and inventory of SMCJ188AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ188AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188AHM3/H?
SMCJ188AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188AHM3/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 SMCJ188AHM3/H?
For technical support, including SMCJ188AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188AHM3/H requirements.
6.How does Aetrix verify that SMCJ188AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ188AHM3/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 SMCJ188AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ188AHM3/H?
All SMCJ188AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188AHM3/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 SMCJ188AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ188AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188AHM3/H Tags
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