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Vishay General Semiconductor - Diodes Division SMCJ188A-M3/57T
- Part No.:
- SMCJ188A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188A-M3/57T.pdf
- Description:
- TVS DIODE 188VWM DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,818
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Product details
Overview
SMCJ188A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power 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, protecting sensitive MOSFETs, ICs, and sensor interfaces in industrial and automotive systems.
For engineers reviewing the SMCJ188A-M3/57T datasheet, SMCJ188A-M3/57T pinout, SMCJ188A-M3/57T application, or SMCJ188A-M3/57T equivalent, key selection criteria include its 1500 W peak pulse power rating, 1.0 µA max reverse leakage at VWM, SMC (DO-214AB) package compatibility with automated placement, and halogen-free RoHS-compliant construction per M3 suffix.
Technical Context
The SMCJ188A-M3/57T operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 209–231 V breakdown range (VBR) at 1 mA test current. Its glass-passivated junction ensures stable clamping performance and low incremental surge resistance under repetitive transient stress.
Designed for PCB-level protection against inductive switching spikes and lightning-induced surges, it delivers sub-nanosecond response time and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 188 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 209–231 V at 1 mA - Confirmed avalanche initiation range for reliable overvoltage detection |
| VC (Clamping Voltage) | 328 V at 4.6 A IPPM - Peak voltage seen by protected circuit during full-rated 1500 W transient |
| PPPM (Peak Pulse Power) | 1500 W - Sustains 10/1000 µs waveform without failure; defines surge energy handling capability |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and matte tin leads |
| Operating Temperature | -55 °C to +150 °C - Supports under-hood automotive and industrial environments without derating |
Pinout & Package
SMCJ188A-M3/57T uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two coplanar terminals. Polarity is marked by a cathode band; the banded end is the cathode (K), and the unmarked end is the anode (A). Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines polarity-sensitive clamping direction |
| Cathode (K) | Avalanche conduction terminal / Clamping output | Banded terminal; sinks surge current to ground or return path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without derating on standard PCB pads |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for 200 V-class electronics |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEMs without compromising thermal or electrical performance |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow processing at 260 °C peak without baking or special handling |
| Glass passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against back-EMF spikes from relay and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or signal inputs to clamp inductive kick to safe levels. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining <1 µA leakage at 188 V system rail. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 1500 W pulses without degradation during ISO 7637-2 Test 5a/b events. Use Value: Enables compliance with AEC-Q101 stress requirements when paired with HM3 variants; M3 version supports commercial-grade BOM flexibility. |
| Telecom Power Feeds | Renewable Energy Inverters |
|
Use Scenario: Input-stage protection for PoE-powered equipment subjected to lightning-induced common-mode surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary clamping device on DC input rails upstream of DC/DC converters and PHY ICs. Use Value: Limits transient voltage to ≤328 V during 10/1000 µs surges, preserving 200 V-rated input capacitors and controller ICs. |
Use Scenario: DC-link overvoltage suppression in solar string inverters during rapid grid disconnection or arc-fault events. IC Role / Device Role / Timing Role: Parallel-connected TVS array on 1000 V DC bus to absorb localized energy bursts before crowbar activation. Use Value: Delivers 328 V clamping at 4.6 A with 0.108 %/°C VBR tempco, ensuring predictable coordination with downstream overvoltage protection. |
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-M3 | Lower PPPM (600 W), same VWM/VBR range, SMB (DO-214AA) package (smaller footprint, higher RθJA) | Reduced surge margin; suitable only for lower-energy transients or space-constrained layouts where 1500 W is not required | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 |
| SMCJ188CA-M3 | Bidirectional variant; identical VWM/VBR/PPPM but symmetric clamping in both polarities; no polarity marking | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN) where reverse polarity surges occur | Choose for bidirectional protection needs; not interchangeable without circuit redesign due to polarity and layout differences |
Compared with SMBJ188A-M3, SMCJ188A-M3/57T provides 2.5× higher surge energy handling in the same mounting style; versus SMCJ188CA-M3, it offers optimized unidirectional clamping with tighter leakage control for DC-biased rails.
Availability
SMCJ188A-M3/57T is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply and halogen-free compliance.
Supply support for SMCJ188A-M3/57T 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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMCJ188A-M3/57T at its rated peak pulse current?
The SMCJ188A-M3/57T has a maximum clamping voltage (VC) of 328 V at its rated peak pulse current of 4.6 A (10/1000 µs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during full-rated surge events. The SMCJ188A-M3/57T maintains this clamping performance across its operational temperature range.
Is SMCJ188A-M3/57T suitable for automotive applications?
SMCJ188A-M3/57T is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the HM3-suffixed variant (e.g., SMCJ188A-HM3/57T) which carries AEC-Q101 qualification. The SMCJ188A-M3/57T remains appropriate for commercial-grade automotive subsystems where formal qualification is not mandated, such as non-safety-critical infotainment power rails.
What does the "M3" suffix indicate in SMCJ188A-M3/57T?
The "M3" suffix in SMCJ188A-M3/57T denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It distinguishes the part from the "E3" (RoHS-compliant, non-halogen-free) and "HM3" (AEC-Q101 qualified + halogen-free) variants. The SMCJ188A-M3/57T is intended for commercial and industrial applications requiring environmentally compliant packaging without automotive qualification.
How does the SMCJ188A-M3/57T compare to SMCJ188CA-M3/57T?
The SMCJ188A-M3/57T is unidirectional with a cathode band marking and optimized for DC-biased protection, whereas SMCJ188CA-M3/57T is bidirectional with symmetric clamping in both polarities and no polarity marking. Their VWM (188 V), VBR (209–231 V), and PPPM (1500 W) are identical, but they are not functionally interchangeable without verifying circuit topology and surge polarity requirements. The SMCJ188A-M3/57T exhibits 1.0 µA max reverse leakage at VWM, while the CA version specifies doubled ID for VWM ≤10 V only.
What is the thermal resistance of SMCJ188A-M3/57T under standard mounting conditions?
The SMCJ188A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per the Vishay datasheet. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values define power derating above 25 °C ambient and inform heatsinking decisions for sustained surge duty cycles. The SMCJ188A-M3/57T must be routed with adequate copper area to maintain safe junction temperatures below 150 °C.
SMCJ188A-M3/57T 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):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- 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 (SMC)
SMCJ188A-M3/57T FAQ
1.How can I place an order for SMCJ188A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ188A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ188A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188A-M3/57T?
SMCJ188A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188A-M3/57T 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-M3/57T?
For technical support, including SMCJ188A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188A-M3/57T requirements.
6.How does Aetrix verify that SMCJ188A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ188A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ188A-M3/57T?
All SMCJ188A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ188A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188A-M3/57T Tags
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