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Vishay General Semiconductor - Diodes Division SMCJ188AHM3_A/I
- Part No.:
- SMCJ188AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188AHM3_A/I.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,941
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Product details
Overview
SMCJ188AHM3_A/I 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, 209–231 V breakdown range at 1 mA, and 1500 W peak pulse power rating under 10/1000 µs waveform. It clamps transients to ≤328 V at 4.6 A peak surge current and operates across –55 °C to +150 °C junction temperature, commonly used to protect power rails and signal lines in industrial motor drives.
For engineers reviewing the SMCJ188AHM3_A/I datasheet, SMCJ188AHM3_A/I pinout, SMCJ188AHM3_A/I application, or SMCJ188AHM3_A/I equivalent, key selection criteria include its 188 V stand-off voltage, unidirectional polarity, halogen-free RoHS-compliant HM3 suffix, AEC-Q101 qualification readiness, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its low incremental surge resistance ensures minimal voltage overshoot during clamping, while thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead) supports reliable operation under repetitive surge stress when mounted per recommended pad layout.
The device complies with ANSI/IEEE C62.35 for surge protector characterization and meets JESD201 Class 2 whisker resistance. Its MSL Level 1 rating (per J-STD-020) allows unlimited floor life before reflow, and the matte tin-plated leads ensure solderability per J-STD-002 and JESD22-B102.
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 at IT = 1 mA - Confirmed breakdown threshold range for design margining |
| VC @ IPPM | 328 V at 4.6 A - Clamped voltage during full 1500 W surge, defining protected circuit's max exposure |
| PPPM | 1500 W - Peak pulse power handling under standardized 10/1000 µs waveform |
| IFSM | 200 A - Single half-sine surge current rating (8.3 ms), critical for inductive load switching |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ188AHM3_A/I is housed in an SMC (DO-214AB) package: a rectangular, low-profile, surface-mount case with two coplanar matte tin-plated leads. Polarity is marked by a cathode band on the body; the banded end is the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts surge current to ground during overvoltage events |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental standards and JESD201 Class 2 whisker resistance |
| AEC-Q101 qualification ready | HM3 variant supports automotive-grade reliability validation without redesign |
| Low profile SMC package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment |
| Glass passivated junction | Ensures stable VBR over time and improved moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 | Allows indefinite storage and assembly without dry-pack or baking requirements |
Applications
| Industrial Motor Drives | Automotive Power Modules |
|---|---|
Use Scenario: Protection of DC bus inputs against back-EMF spikes from brushed/BLDC motor commutation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side switch output and ground to clamp inductive kickback. Use Value: Limits voltage excursion to ≤328 V during 200 A surge events, preventing gate oxide failure in MOSFETs rated for 400 V breakdown. | Use Scenario: Guarding 12 V/24 V battery-fed control circuits against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Standoff-rated TVS on power input rail upstream of LDOs and microcontrollers. Use Value: Withstands 1500 W pulses up to 328 V clamping, meeting automotive load dump immunity requirements without derating. |
| Telecom Power Supplies | Industrial PLC I/O Modules |
Use Scenario: Secondary-side surge protection on 48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between +48 V rail and chassis ground to shunt induced common-mode energy. Use Value: 188 V VWM avoids leakage during normal operation while clamping 10/1000 µs surges to safe levels for downstream DC-DC converters. | Use Scenario: Input protection for analog sensor channels (e.g., 4–20 mA loops) in factory automation cabinets. IC Role / Device Role / Timing Role: Low-leakage TVS on signal line to ground, leveraging <1 µA reverse leakage at VWM. Use Value: Prevents false triggering in precision current-loop receivers by limiting transient-induced offset without affecting baseline accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHM3_A/I | Lower PPPM (600 W), same VWM/VBR, SMB (DO-214AA) package | Reduced surge capacity; suitable only for lower-energy environments (e.g., non-industrial signal lines) | Select when board space is constrained and surge threat level is ≤600 W |
| SMCJ188AHE3_A/I | Same electrical specs, but E3 suffix indicates standard RoHS (non-halogen-free) and no AEC-Q101 qualification path | Acceptable for commercial/industrial use where halogen-free or automotive qualification is not mandated | Choose for cost-sensitive non-automotive designs requiring identical performance |
Compared with SMCJ188AHM3_A/I, SMBJ188AHM3_A/I trades surge robustness for smaller footprint, while SMCJ188AHE3_A/I retains full electrical equivalence but lacks halogen-free and AEC-Q101-ready status-making SMCJ188AHM3_A/I optimal for automotive-qualified, environmentally compliant, high-energy protection.
Availability
SMCJ188AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive power modules, and telecom power supplies requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMCJ188AHM3_A/I 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 industrial, automotive, and telecom systems where robust overvoltage protection is mission-critical.
FAQ
What is the clamping voltage of SMCJ188AHM3_A/I at its rated peak pulse current?
The SMCJ188AHM3_A/I has a maximum clamping voltage (VC) of 328 V when subjected to its peak pulse current (IPPM) of 4.6 A under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per datasheet conditions. The SMCJ188AHM3_A/I maintains this clamping performance across its specified operating temperature range.
Is SMCJ188AHM3_A/I qualified for automotive applications?
The SMCJ188AHM3_A/I carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and built to AEC-Q101 qualification readiness-meaning it meets the construction and test requirements for automotive-grade TVS diodes. While final AEC-Q101 certification requires customer-level qualification testing, the SMCJ188AHM3_A/I's material set, process controls, and thermal robustness align with automotive reliability expectations. Full qualification documentation is available upon request for SMCJ188AHM3_A/I.
What does the "HM3" suffix mean in SMCJ188AHM3_A/I?
The "HM3" suffix in SMCJ188AHM3_A/I denotes a halogen-free, RoHS-compliant version that also satisfies JESD201 Class 2 whisker resistance and MSL Level 1 handling requirements. It distinguishes the part from E3 (RoHS-compliant only) and HE3/HM3 variants intended for automotive qualification paths. The "_A/I" portion specifies packaging: "A" is the revision code, and "I" indicates 13-inch tape-and-reel delivery (3500 units per reel). This coding ensures precise material and logistics traceability for SMCJ188AHM3_A/I.
How does SMCJ188AHM3_A/I differ from bidirectional versions like SMCJ188CA?
The SMCJ188AHM3_A/I is unidirectional, featuring a cathode band and conducting only in reverse bias above VBR, whereas SMCJ188CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Electrically, SMCJ188AHM3_A/I has a forward voltage drop (~3.5 V at 100 A) and higher IFSM (200 A), while SMCJ188CA omits forward conduction capability and is used where AC or bipolar transients dominate. Selection depends on circuit topology-not interchangeability. SMCJ188AHM3_A/I is not a drop-in replacement for SMCJ188CA.
What is the thermal resistance of SMCJ188AHM3_A/I, and how does it affect layout?
The SMCJ188AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. These values assume mounting on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repeated surges, PCB layout must replicate this copper area and avoid thermal bottlenecks-such as narrow traces or insufficient inner-layer copper pours-since exceeding +150 °C junction temperature risks parametric shift or failure. Proper thermal design directly enables SMCJ188AHM3_A/I's rated 1500 W pulse capability.
SMCJ188AHM3_A/I 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/I FAQ
1.How can I place an order for SMCJ188AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188AHM3_A/I 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/I reliable?
The price and inventory of SMCJ188AHM3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMCJ188AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188AHM3_A/I?
SMCJ188AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188AHM3_A/I 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/I?
For technical support, including SMCJ188AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ188AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ188AHM3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMCJ188AHM3_A/I?
All SMCJ188AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188AHM3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMCJ188AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188AHM3_A/I Tags
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