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Vishay General Semiconductor - Diodes Division SMCJ188A-E3/57T
- Part No.:
- SMCJ188A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188A-E3/57T.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,508
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Product details
Overview
SMCJ188A-E3/57T 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 stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 µs. It clamps transients to ≤328 V at 4.6 A peak pulse current and operates across –55 °C to +150 °C junction temperature, commonly used to protect power rails and I/O lines in industrial motor drives.
For engineers reviewing the SMCJ188A-E3/57T datasheet, SMCJ188A-E3/57T pinout, SMCJ188A-E3/57T application, or SMCJ188A-E3/57T equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ188A-E3/57T employs a glass-passivated silicon junction optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs transients, while thermal resistance of 75 °C/W (junction-to-ambient) supports operation without forced cooling when mounted per recommended pad layout.
This device functions as a shunt-type overvoltage protector: during normal operation it presents high impedance (>1 GΩ) below VWM; upon exceeding VBR, it avalanches into low-impedance conduction, diverting surge current away from downstream ICs or MOSFETs while maintaining VC ≤ 328 V at rated IPPM.
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 1.0 mA - Confirmed avalanche onset range defining reliable turn-on threshold |
| VC @ IPPM | 328 V at 4.6 A - Clamped voltage during full 1500 W surge, limiting stress on protected circuitry |
| PPPM | 1500 W - Peak surge energy handling capability per 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ range | –55 °C to +150 °C - Enables deployment in under-hood automotive or industrial ambient environments |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ188A-E3/57T uses the SMC (DO-214AB) package: a 2-terminal surface-mount case with cathode band marking. Terminals are matte tin-plated leads compliant with J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). Polarity is unidirectional; the marked band denotes the cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for reverse-biased protection path | Connected to protected line (e.g., DC bus); conducts surge current to ground when voltage exceeds VBR |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping loop during transient events |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment for automated manufacturing |
| Glass-passivated junction | Ensures long-term reliability and stable VBR performance under thermal cycling and humidity exposure |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking, reducing production overhead and moisture-related defects |
| 1500 W peak pulse power | Provides robust immunity against severe transients including IEC 61000-4-5 Level 4 (4 kV line-earth) |
| RoHS-compliant E3 suffix | Meets global environmental regulations with matte tin plating and halogen-free molding compound |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC link capacitors and gate drivers against switching spikes and load dump surges in variable-frequency drives. IC Role / Device Role / Timing Role: Shunt TVS placed across input bus or between gate driver output and power MOSFET source. Use Value: Limits transient overvoltage to ≤328 V, preventing destructive avalanche failure in 600 V IGBTs and maintaining system uptime. | Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary clamping device on secondary side of isolation transformer, upstream of DC-DC converters. Use Value: Absorbs 1500 W pulses without degradation, ensuring uninterrupted service during Category B/C surge events per GR-1089-CORE. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: Reverse battery and load dump protection on 12 V supply inputs of BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-input rail, activated only during positive overvoltage events. Use Value: Withstands 200 A surge current (IFSM) and clamps to safe levels within nanoseconds, preserving AEC-Q100 qualified components. | Use Scenario: Field-side analog input protection against induced surges from solenoid valve switching in factory automation systems. IC Role / Device Role / Timing Role: Front-end TVS on 0–10 V or 4–20 mA sensor interface lines, placed before precision op-amp conditioning stages. Use Value: Ultra-low 1.0 µA leakage avoids measurement offset errors, while 328 V clamping prevents ADC saturation and front-end damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188A-E3/52T | Lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for lower-energy surges or space-constrained designs where 1500 W headroom is unnecessary | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 2 |
| SMCJ188CA-E3/57T | Bidirectional variant; identical VWM/VBR/PPPM but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where negative transients must also be suppressed | Choose only if bidirectional protection is mandated by circuit topology or standards (e.g., RS-485, CAN FD) |
Compared with SMBJ188A-E3/52T and SMCJ188CA-E3/57T, the SMCJ188A-E3/57T delivers optimal balance of high-energy clamping, thermal performance, and unidirectional efficiency for DC power rail protection-without sacrificing manufacturability or regulatory compliance.
Availability
SMCJ188A-E3/57T is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial PLC I/O cards requiring stable component supply and long-term production continuity.
Supply support for SMCJ188A-E3/57T 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, power efficiency, and automotive-grade qualification.
The SMCJ series is engineered specifically for high-power transient suppression in harsh environments, targeting applications demanding AEC-Q101 readiness, high surge robustness, and consistent clamping performance across wide temperature ranges.
FAQ
What is the maximum clamping voltage of the SMCJ188A-E3/57T under rated surge conditions?
The SMCJ188A-E3/57T has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current (IPPM) of 4.6 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions and defines the upper voltage limit imposed on protected circuitry during a full-power transient event. The SMCJ188A-E3/57T maintains this clamping performance consistently across its operational temperature range.
Is the SMCJ188A-E3/57T suitable for automotive applications?
The SMCJ188A-E3/57T is RoHS-compliant and manufactured to commercial-grade specifications; however, it is not AEC-Q101 qualified. For automotive use, Vishay offers the SMCJ188AHE3 variant (with HE3 suffix), which undergoes additional stress testing and qualification per AEC-Q101. The SMCJ188A-E3/57T may be used in non-safety-critical automotive subsystems only after thorough system-level validation. Always verify qualification status via the official Vishay ordering code before automotive deployment.
How does the SMCJ188A-E3/57T differ from the SMCJ188CA-E3/57T?
The SMCJ188A-E3/57T is unidirectional, meaning it conducts only during positive overvoltage events relative to its cathode, while the SMCJ188CA-E3/57T is bidirectional and provides symmetrical clamping for both polarities. Both share identical VWM (188 V), VBR (209–231 V), PPPM (1500 W), and package (SMC). The SMCJ188A-E3/57T is appropriate for DC power rail protection, whereas the SMCJ188CA-E3/57T is required for AC signals or floating nodes where negative transients occur.
What is the thermal resistance and recommended mounting for optimal performance of the SMCJ188A-E3/57T?
The SMCJ188A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To ensure reliable operation at full 1500 W surge rating, use adequate copper area and avoid excessive trace length between the SMCJ188A-E3/57T and ground plane. Thermal derating is required above TA = 25 °C per Figure 2 in the Vishay datasheet 88394. The SMCJ188A-E3/57T achieves best thermal performance with symmetric pad layout and no thermal relief on anode/cathode connections.
Does the SMCJ188A-E3/57T require external current-limiting components in series?
No, the SMCJ188A-E3/57T is a passive shunt device that does not require series current-limiting resistors for basic surge suppression. Its low dynamic impedance during clamping allows it to safely divert surge current directly to ground. However, in circuits with sustained overvoltage (e.g., failed upstream regulator), a fuse or polyfuse is recommended upstream to prevent thermal runaway. The SMCJ188A-E3/57T's 6.5 W steady-state power dissipation rating applies only to continuous DC conditions-not transient events-and is not a design constraint for surge-only applications.
SMCJ188A-E3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ188A-E3/57T FAQ
1.How can I place an order for SMCJ188A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188A-E3/57T 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 SMCJ188A-E3/57T reliable?
The price and inventory of SMCJ188A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ188A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188A-E3/57T?
SMCJ188A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188A-E3/57T 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 SMCJ188A-E3/57T?
For technical support, including SMCJ188A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188A-E3/57T requirements.
6.How does Aetrix verify that SMCJ188A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ188A-E3/57T 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 SMCJ188A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ188A-E3/57T?
All SMCJ188A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188A-E3/57T, 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 SMCJ188A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ188A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188A-E3/57T Tags
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