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Vishay General Semiconductor - Diodes Division SMCJ188AHE3_A/I
- Part No.:
- SMCJ188AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188AHE3_A/I.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
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Product details
Overview
SMCJ188AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It features a 188 V stand-off voltage (VWM), 328 A peak pulse current (IPPM) at 10/1000 µs, and clamps transients to 328 V maximum, making it suitable for automotive power supply input protection and industrial DC bus surge suppression.
For engineers reviewing the SMCJ188AHE3_A/I datasheet, SMCJ188AHE3_A/I pinout, SMCJ188AHE3_A/I application, or SMCJ188AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 1500 W peak pulse power rating, low 0.108 %/°C VBR temperature coefficient, and SMC (DO-214AB) surface-mount package compatibility with automated assembly.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 188 V stand-off voltage and rapidly transitions to low-impedance conduction when exposed to overvoltage events exceeding its 209–231 V breakdown range. Its glass-passivated junction ensures stable leakage performance and fast response time under transient stress.
Designed for unidirectional operation, the SMCJ188AHE3_A/I exhibits a maximum reverse leakage of 1.0 µA at VWM and a clamping voltage of 328 V at 328 A IPPM - critical for protecting downstream MOSFETs and controllers in 24 V and 48 V industrial systems without compromising steady-state efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 150–200 V DC bus applications. |
| VBR min/max | 209 V / 231 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on behavior across temperature and lot variation. |
| VC @ IPPM | 328 V - Clamped voltage during 10/1000 µs surge at rated peak current; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing in properly designed layouts. |
| IPPM | 328 A - Peak surge current capacity at 10/1000 µs waveform; enables robust protection against lightning-induced surges on long cables or inductive switching events. |
| TJ max | +150 °C - Maximum junction temperature rating; allows operation in under-hood automotive environments and enclosed industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with IPC-7351B land patterns and reflow profiles. |
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) | Anode-side connection point in unidirectional configuration | Connected to protected line (e.g., +VIN); conducts surge current toward ground when voltage exceeds VBR. |
| Anode (non-banded end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for under-hood and ADAS power rail protection. |
| 1500 W peak pulse power | Enables single-device protection against severe transients per ISO 7637-2 Pulse 5a (load dump) without parallel staging. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (< 1 ns rise time), improving protection margin for sensitive gate drivers. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates bake requirements pre-assembly. |
| Glass passivated junction | Provides stable leakage current (< 1 µA at VWM) and long-term parameter stability under thermal and humidity stress. |
Applications
| Automotive Power Input Protection | Industrial DC Bus Surge Suppression |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump transients up to 35 V and ISO 7637-2 Pulse 5a events. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and input filter capacitor. Use Value: Limits voltage seen by downstream DC/DC converters to ≤328 V, preventing catastrophic failure during 12 V system load dump. | Use Scenario: Safeguarding 48 V telecom rectifier outputs against lightning-induced surges on outdoor cable runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on output side of isolated DC/DC stage. Use Value: Absorbs up to 1500 W of transient energy without degradation, maintaining system uptime in harsh field deployments. |
| Motor Drive Gate Driver Protection | PLC Analog Input Channel Protection |
Use Scenario: Shielding high-side gate drivers in BLDC inverters from shoot-through-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Fast-clamping TVS across gate-source terminals of SiC MOSFETs. Use Value: Responds in <1 ps to limit VGS excursion to safe levels, preserving gate oxide integrity during fault conditions. | Use Scenario: Guarding 4–20 mA analog input circuits in programmable logic controllers against ESD and field wiring faults. IC Role / Device Role / Timing Role: Low-leakage (1 µA) TVS on signal line before precision op-amp front-end. Use Value: Maintains measurement accuracy while diverting >8 kV HBM ESD pulses away from sensitive instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHE3_A/I | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM and VBR range | Reduced surge handling for space-constrained consumer electronics where full 1500 W is not required | Select when board area is limited and surge threat level is lower (e.g., IEC 61000-4-2 only). |
| SMCJ188CAHE3_A/I | Bidirectional variant with identical VWM/VBR specs but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, CAN FD) | Choose for bidirectional protection needs; note that unidirectional SMCJ188AHE3_A/I cannot replace it in AC applications. |
Compared with SMBJ188AHE3_A/I and SMCJ188CAHE3_A/I, the SMCJ188AHE3_A/I delivers higher surge immunity in a standardized SMC footprint while maintaining AEC-Q101 compliance - making it optimal for automotive and industrial DC power rail protection where robustness and qualification are mandatory.
Availability
SMCJ188AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom power system integration requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ188AHE3_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, MOSFETs, and protection devices 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 automotive, industrial, and telecom infrastructure - balancing clamping performance, thermal robustness, and AEC-Q101 compliance.
FAQ
What is the maximum clamping voltage of the SMCJ188AHE3_A/I under a 10/1000 µs surge?
The SMCJ188AHE3_A/I has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current of 328 A using the standard 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 surge events. The SMCJ188AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is the SMCJ188AHE3_A/I suitable for automotive applications?
Yes, the SMCJ188AHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HE3. It meets rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD immunity - making it appropriate for engine control units, body electronics, and ADAS power supplies. The SMCJ188AHE3_A/I also complies with MSL Level 1 for lead-free reflow assembly.
How does the SMCJ188AHE3_A/I differ from the bidirectional SMCJ188CAHE3_A/I?
The SMCJ188AHE3_A/I is unidirectional and conducts only in reverse bias above VBR, while the SMCJ188CAHE3_A/I is bidirectional with symmetrical clamping in both polarities. Their VWM (188 V), VBR (209–231 V), and PPPM (1500 W) are identical, but the SMCJ188AHE3_A/I cannot protect AC or polarity-reversing signals. Use the SMCJ188AHE3_A/I for DC power rails; select SMCJ188CAHE3_A/I for differential buses like CAN FD or RS-485.
What is the thermal resistance of the SMCJ188AHE3_A/I in typical PCB mounting?
The SMCJ188AHE3_A/I 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" copper pads per terminal). Its junction-to-lead resistance (RθJL) is 15 °C/W, supporting effective heat transfer to PCB copper planes. These values enable reliable operation at full power dissipation up to +125 °C ambient when used with adequate copper area.
Does the SMCJ188AHE3_A/I require derating at elevated temperatures?
Yes, the SMCJ188AHE3_A/I must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet 88394. At +85 °C ambient, its peak pulse power capability reduces to approximately 70 % of rated 1500 W, and at +125 °C, it drops to ~40 %. Derating ensures junction temperature remains below the +150 °C maximum. The SMCJ188AHE3_A/I's 0.108 %/°C VBR temperature coefficient also affects precise clamping threshold stability across temperature.
SMCJ188AHE3_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:
- -
- 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/I FAQ
1.How can I place an order for SMCJ188AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188AHE3_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 SMCJ188AHE3_A/I reliable?
The price and inventory of SMCJ188AHE3_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 SMCJ188AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ188AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188AHE3_A/I?
SMCJ188AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188AHE3_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 SMCJ188AHE3_A/I?
For technical support, including SMCJ188AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ188AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ188AHE3_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 SMCJ188AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ188AHE3_A/I?
All SMCJ188AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188AHE3_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 SMCJ188AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ188AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188AHE3_A/I Tags
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