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Vishay General Semiconductor - Diodes Division SMCJ188AHE3_A/H
- Part No.:
- SMCJ188AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188AHE3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,369
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Product details
Overview
SMCJ188AHE3_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 (VWM), 209–231 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 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, targeting automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ188AHE3_A/H datasheet, SMCJ188AHE3_A/H pinout, SMCJ188AHE3_A/H application, or SMCJ188AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge rating, 188 V stand-off capability, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance to minimize clamping overshoot. Its unidirectional configuration provides cathode-banded polarity alignment for DC-biased lines such as automotive battery feeds and industrial 24 V control inputs.
The device meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and delivers stable clamping performance under repetitive surges when mounted on minimum recommended pad layout-0.31" × 0.31" (8.0 mm × 8.0 mm) copper per terminal-with thermal resistance RθJA = 75 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line's nominal DC bias. |
| VBR min/max | 209 V / 231 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above VWM with margin against false triggering. |
| VC @ IPPM | 328 V at 4.6 A - Clamped voltage during 10/1000 μs surge; defines worst-case overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm body and 2.06 mm height; compatible with JEDEC MS-013AC footprint. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for engine control, ADAS, and body electronics. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage events; must be routed with low-inductance path to chassis or system ground. |
| Anode (non-banded end) | Reference node | Typically tied to system ground or negative rail; completes conduction path during clamping; requires solid grounding to sustain 1500 W dissipation without thermal runaway. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe transients like load dump (ISO 7637-2 Pulse 5a) without cascaded TVS stages. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including temperature cycling, humidity, and mechanical shock exposure. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and consistent VBR over lifetime, critical for low-power sensor interfaces. |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating moisture sensitivity handling constraints. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected components-e.g., 328 V clamp vs. 226 V typical VBR reduces MOSFET VDSS derating burden. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protection of 24 V supply lines feeding ECUs, lighting modules, and actuators against ISO 7637-2 load dump pulses (up to 60 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDOs or DC-DC converters. Use Value: Withstands 1500 W peak power and operates up to +150 °C, enabling direct placement near connectors without thermal derating penalties. |
Use Scenario: Guarding analog outputs (4–20 mA) and digital I/O (CAN, LIN) of PLC modules against field-induced surges from motor drives or solenoid switching. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines to suppress fast transients (IEC 61000-4-4, 40 A, 5/50 ns) while maintaining <1 μA leakage at 188 V. Use Value: Low capacitance (<50 pF) and precise VBR ensure minimal signal distortion on high-impedance sensor inputs and fast digital edges. |
| Telecom Power Feeds | Renewable Energy Controllers |
|
Use Scenario: Safeguarding PoE-powered equipment (IEEE 802.3af/at) and remote radio units from lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary-level TVS on input stage of DC-DC converter, coordinated with upstream fuses and secondary MOVs. Use Value: 188 V VWM matches telecom rectified bus voltages; 328 V VC limits stress on 400 V-rated input capacitors and FETs. |
Use Scenario: Protecting MPPT controller inputs connected to solar panel strings (open-circuit voltage up to 1000 V) from induced surges during grid faults or lightning. IC Role / Device Role / Timing Role: Secondary-stage TVS on DC link monitoring circuits and microcontroller supply rails after primary isolation. Use Value: AEC-Q101 qualification ensures resilience in outdoor, high-UV, wide-temperature environments where failure modes are mission-critical. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHE3_A/H | Same VWM (188 V), lower PPPM (600 W), SMB (DO-214AA) package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained PCBs with lower surge threat levels (e.g., IEC 61000-4-5 Level 2); not rated for automotive load dump. | Select when board area is limited and peak surge energy does not exceed 600 W; verify thermal margin with reduced copper pad area. |
| SMCJ188CAHE3_A/H | Bidirectional variant; identical VWM (188 V), same PPPM (1500 W), but symmetric clamping in both polarities (no cathode marking) | Required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY) where polarity reversal or differential surges occur. | Choose only if bidirectional protection is mandated; unidirectional SMCJ188AHE3_A/H offers better leakage and tighter VBR tolerance for DC rails. |
Compared with SMBJ188AHE3_A/H, the SMCJ188AHE3_A/H delivers 2.5× higher surge power handling and superior thermal performance for automotive and industrial mains-connected systems; versus SMCJ188CAHE3_A/H, it provides optimized unidirectional clamping with lower reverse leakage and defined polarity for grounded DC applications.
Availability
SMCJ188AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom power feeds, and renewable energy controllers requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCJ188AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMCJ series was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and repeatable clamping behavior are non-negotiable.
FAQ
What is the maximum clamping voltage of the SMCJ188AHE3_A/H under a 10/1000 μs surge?
The SMCJ188AHE3_A/H clamps to a maximum of 328 V when subjected to its rated peak pulse current of 4.6 A using the standardized 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 represents the highest overvoltage that downstream circuitry will experience during a full-power transient event. The SMCJ188AHE3_A/H maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is the SMCJ188AHE3_A/H qualified for automotive applications?
Yes, the SMCJ188AHE3_A/H carries AEC-Q101 qualification, confirming its suitability for automotive electronic systems including engine control units, body electronics, and ADAS modules. This qualification covers stress tests such as high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST). The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction, making the SMCJ188AHE3_A/H appropriate for under-hood and cabin-mounted designs operating from –55 °C to +150 °C.
How does the SMCJ188AHE3_A/H differ from the bidirectional SMCJ188CAHE3_A/H?
The SMCJ188AHE3_A/H is unidirectional with a marked cathode band and optimized for DC-biased lines, exhibiting <1 μA reverse leakage at 188 V and tighter VBR tolerance (209–231 V). In contrast, the SMCJ188CAHE3_A/H is bidirectional-lacking polarity marking-with symmetric clamping in both directions and double the ID limit (2 μA) for VWM ≤10 V devices (not applicable here). For the SMCJ188AHE3_A/H, the unidirectional design delivers lower leakage and more predictable turn-on behavior on grounded 24 V or 48 V rails, whereas the CA version suits AC or floating differential signals like RS-485.
What is the thermal resistance and recommended mounting for optimal performance of the SMCJ188AHE3_A/H?
The SMCJ188AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To achieve rated 1500 W pulse power and avoid thermal runaway, use full-surface copper pours connected to internal ground planes via multiple vias. Avoid narrow traces or isolated pads-the SMCJ188AHE3_A/H relies on copper mass for heat spreading during transient events. Its RθJL of 15 °C/W further supports efficient conduction to PCB copper.
Can the SMCJ188AHE3_A/H replace older SMCJ188A variants without design changes?
Yes, the SMCJ188AHE3_A/H is a direct replacement for legacy SMCJ188A parts with E3/M3/HE3/HM3 suffixes, sharing identical electrical specifications, SMC (DO-214AB) package dimensions, pinout, and thermal characteristics. The "_A/H" revision code indicates updated manufacturing and qualification per the 09-Jan-2024 datasheet (Doc. #88394), with no functional or mechanical deviations. Engineers may substitute the SMCJ188AHE3_A/H into existing layouts without PCB or firmware modifications, retaining full compliance with AEC-Q101 and UL 497B recognition.
SMCJ188AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ188AHE3_A/H FAQ
1.How can I place an order for SMCJ188AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188AHE3_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 SMCJ188AHE3_A/H reliable?
The price and inventory of SMCJ188AHE3_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 SMCJ188AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ188AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188AHE3_A/H?
SMCJ188AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188AHE3_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 SMCJ188AHE3_A/H?
For technical support, including SMCJ188AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ188AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ188AHE3_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 SMCJ188AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ188AHE3_A/H?
All SMCJ188AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188AHE3_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 SMCJ188AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ188AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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