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Vishay General Semiconductor - Diodes Division SMCJ188AHM3_A/H
- Part No.:
- SMCJ188AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188AHM3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,971
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Product details
Overview
SMCJ188AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 188 V standoff voltage, 328 A peak pulse current (10/1000 µs), and 1500 W peak pulse power dissipation. It protects MOSFETs, ICs, and sensor signal lines in automotive power systems and industrial control interfaces.
For engineers reviewing the SMCJ188AHM3_A/H datasheet, SMCJ188AHM3_A/H pinout, SMCJ188AHM3_A/H application, or SMCJ188AHM3_A/H equivalent, key selection criteria include clamping voltage (328 V at IPPM), unidirectional polarity, AEC-Q101 qualification status, and halogen-free RoHS compliance per HM3 suffix - critical for automotive-grade ESD/surge resilience in 12 V/24 V board-level designs.
Technical Context
The SMCJ188AHM3_A/H employs a glass-passivated silicon junction optimized for low incremental surge resistance and sub-nanosecond response to transient overvoltages. Its breakdown voltage range (209–231 V at 1 mA test current) ensures precise triggering above normal operating rails while maintaining tight thermal derating up to 150 °C junction temperature.
Designed for mounting on 8.0 mm × 8.0 mm copper pads per JEDEC standard, it delivers stable clamping performance under repetitive surge stress, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation without active cooling in space-constrained automotive ECUs and industrial I/O modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 188 V - maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 209–231 V at 1 mA - guaranteed conduction threshold for transient suppression |
| Clamping Voltage (VC) | 328 V at 328 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPPM) | 1500 W - energy-handling capacity for standardized lightning/surge transients |
| Peak Pulse Current (IPPM) | 328 A - maximum non-repetitive surge current the device safely clamps |
| Junction Temperature Range | −55 to +150 °C - supports operation in under-hood automotive and factory-floor environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ188AHM3_A/H uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two terminals and cathode band marking. Polarity is unidirectional; the marked band denotes the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, 24 V rail); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling and HTRB |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental standards and enables lead-free reflow soldering per J-STD-020 |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH - no baking required prior to SMT assembly |
| Glass passivated junction | Ensures long-term reliability and stable VBR across lifetime under thermal cycling |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in body control modules against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp surges before regulator stage. Use Value: Clamps 328 V at 328 A, limiting downstream voltage stress to <330 V and preserving 40 V-rated input capacitors and controllers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in PLC analog I/O cards. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt transients before signal conditioning op-amps. Use Value: Sub-nanosecond response prevents latch-up in precision amplifiers; 1.0 µA leakage at 188 V preserves loop accuracy. |
| On-Board Charger (OBC) Input Stage | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding AC/DC front-end rectifier outputs in EV on-board chargers exposed to grid surges and regenerative spikes. IC Role / Device Role / Timing Role: Unidirectional TVS across bulk capacitor input to absorb 1500 W pulses without degradation. Use Value: Withstands ≥1000 surges at rated PPPM; 150 °C max junction temperature allows placement near heat-generating PFC stages. | Use Scenario: Protecting isolated gate driver ICs (e.g., SiC MOSFET drivers) from Miller-induced voltage spikes during high-dV/dt switching. IC Role / Device Role / Timing Role: TVS placed across driver output pins to clamp transient overshoot exceeding gate oxide rating. Use Value: 328 V clamping voltage stays below 350 V absolute max rating of common gate drivers, preventing destructive failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ188AHE3/A | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range | Not suitable for >500 W surge events; limited thermal mass for repeated surges | Select when board space is constrained and surge energy is ≤400 W (e.g., low-power sensor nodes) |
| SMCJ188AHE3_A/H | Same electrical specs but commercial-grade (non-AEC-Q101), E3 suffix instead of HM3 | Lacks automotive qualification; not approved for under-hood or safety-critical ECUs | Select for cost-sensitive industrial applications where AEC-Q101 is not mandated |
Compared with SMCJ188AHM3_A/H, SMAJ188AHE3/A offers reduced surge handling in a smaller footprint, while SMCJ188AHE3_A/H provides identical clamping performance without automotive qualification - making the HM3 variant essential for production vehicles and Tier-1 supply chains requiring traceable halogen-free compliance.
Availability
SMCJ188AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, on-board charger input stages, and motor drive gate driver protection requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMCJ188AHM3_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, efficiency, and application-specific validation.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom infrastructure where robustness against ISO 7637, IEC 61000-4-5, and load-dump events is mandatory.
FAQ
What is the clamping voltage of the SMCJ188AHM3_A/H under full-rated surge current?
The SMCJ188AHM3_A/H has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current of 328 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events, ensuring compatibility with 350 V-rated downstream components.
Is SMCJ188AHM3_A/H qualified for automotive use?
Yes, SMCJ188AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes stress testing including HTGB, HTRB, and temperature cycling to meet automotive reliability requirements for under-hood and chassis-mounted electronics.
What does the "HM3" suffix indicate in SMCJ188AHM3_A/H?
The "HM3" suffix in SMCJ188AHM3_A/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It also indicates compliance with JESD201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity - enabling direct placement into lead-free reflow processes without pre-baking.
How does SMCJ188AHM3_A/H differ from bidirectional variants like SMCJ188CA?
SMCJ188AHM3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where reverse conduction must be blocked. In contrast, SMCJ188CA is bidirectional, symmetric in both directions, and used in AC-coupled or differential signal lines (e.g., RS-485) - they are not interchangeable without circuit redesign.
What PCB layout guidance applies to SMCJ188AHM3_A/H for optimal thermal and surge performance?
Per Vishay's datasheet, SMCJ188AHM3_A/H must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve rated 1500 W pulse power and proper thermal dissipation. Trace width should exceed 2.0 mm, and thermal vias under pads are recommended to enhance heat transfer to inner layers or ground planes in multilayer boards.
SMCJ188AHM3_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:
- 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_A/H FAQ
1.How can I place an order for SMCJ188AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188AHM3_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 SMCJ188AHM3_A/H reliable?
The price and inventory of SMCJ188AHM3_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 SMCJ188AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ188AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188AHM3_A/H?
SMCJ188AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188AHM3_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 SMCJ188AHM3_A/H?
For technical support, including SMCJ188AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ188AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ188AHM3_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 SMCJ188AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ188AHM3_A/H?
All SMCJ188AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188AHM3_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 SMCJ188AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ188AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188AHM3_A/H Tags
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