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Vishay General Semiconductor - Diodes Division SMCG188A-E3/57T
- Part No.:
- SMCG188A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG188A-E3/57T.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,318
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Product details
Overview
SMCG188A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with 188 V standoff voltage (VWM), 209–231 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 4.6 A peak pulse current (IPPM) at 10/1000 µs waveform - designed for robust overvoltage protection of automotive power rails and industrial DC bus lines.
For engineers reviewing the SMCG188A-E3/57T datasheet, SMCG188A-E3/57T pinout, SMCG188A-E3/57T application, or SMCG188A-E3/57T equivalent, key selection criteria include clamping voltage (VC = 328 V), AEC-Q101 qualification, MSL Level 1 rating, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 188 V stand-off voltage enables use on 150 V nominal DC systems, while the 328 V clamping voltage at 4.6 A ensures safe voltage limiting during transients such as load dump or inductive switching.
The SMCG188A-E3/57T is rated for TJ = –55 °C to +150 °C, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements. It is RoHS-compliant (E3 suffix), industrial-grade, and qualified to AEC-Q101 for automotive under-hood applications.
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 = 1.0 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 328 V at IPPM = 4.6 A (10/1000 µs) - clamped voltage seen by protected circuit during surge |
| PPPM | 1500 W - peak transient power it can absorb without failure under standard waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage ensuring minimal standby power loss in high-impedance circuits |
| TJ max. | +150 °C - junction temperature limit enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance indicating need for adequate PCB copper area (8.0 mm × 8.0 mm per pad) for power dissipation |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount gull-wing lead frame with cathode band marking on unidirectional devices. Dimensions: 10.16 mm × 7.87 mm × 2.41 mm (L × W × H); lead pitch: 2.54 mm; terminals are matte tin-plated for solderability and whisker resistance (JESD 201 Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Must be tied to lowest potential node in protected circuit to enable proper clamping action |
| Cathode | Current exit point in forward bias; marked with band; connected to protected line | Band identifies polarity; connects to line being protected (e.g., 150 V DC bus) to shunt surges to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream MOSFETs or controllers |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation required for safety-critical industrial and automotive enclosures |
Applications
| Automotive Load Dump Protection | Industrial DC Bus Clamping |
|---|---|
Use Scenario: Protecting engine control unit (ECU) power input against ISO 7637-2 Pulse 5a load dump transients up to 120 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECU input capacitor to clamp voltage spikes above 188 V. Use Value: Limits peak voltage to 328 V during 4.6 A surge, preventing damage to 40 V-rated input regulators and gate drivers. | Use Scenario: Safeguarding 150 V DC link in motor drives from inductive kickback during IGBT switching. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across DC bus to absorb repetitive switching transients. Use Value: Withstands 1500 W pulses and maintains <1 µA leakage at 188 V, preserving bus efficiency and stability. |
| Telecom Power Supply Surge Protection | Renewable Energy Inverter DC Input |
Use Scenario: Shielding 48 V telecom rectifier outputs from lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC output, upstream of DC/DC converters. Use Value: Fast response (<1 ns) and 328 V clamping prevent latch-up in downstream PMICs during 10/1000 µs transients. | Use Scenario: Protecting solar inverter DC input stage from grid-switching transients and PV array fault currents. IC Role / Device Role / Timing Role: High-energy TVS mounted directly across MPPT input terminals to divert surge energy to chassis ground. Use Value: 1500 W PPPM rating and +150 °C TJ max support continuous operation in desert-mounted inverters with ambient >85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ188A-E3/57T | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM/VBR range | Not AEC-Q101 qualified; limited to consumer/industrial, not automotive | Select when space-constrained layouts require smaller footprint and surge energy is ≤400 W |
| SMCJ188A-E3/57T | Same DO-214AB package as SMCG but higher PPPM (1500 W), identical VWM/VBR, no AEC-Q101 | Lacks automotive qualification; thermal resistance higher (RθJA = 11 °C/W vs. 75 °C/W) due to different mounting | Choose if AEC-Q101 is not required and board layout supports larger SMC footprint |
Compared with SMAJ188A-E3/57T and SMCJ188A-E3/57T, the SMCG188A-E3/57T uniquely combines AEC-Q101 qualification, DO-215AB gull-wing geometry for improved thermal conduction via copper pads, and industrial-grade reliability - making it the only option validated for under-hood automotive deployment where both surge robustness and long-term environmental stability are mandatory.
Availability
SMCG188A-E3/57T is available at Aetrix Electronics and suitable for automotive load dump protection, industrial DC bus clamping, and telecom power supply surge protection requiring stable component supply across extended production lifecycles.
Supply support for SMCG188A-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, precision, and automotive-grade qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and renewable energy systems where failure modes must be eliminated through rigorous qualification and proven field performance.
FAQ
What is the clamping voltage of SMCG188A-E3/57T and how is it measured?
The clamping voltage (VC) of SMCG188A-E3/57T is 328 V, measured at a peak pulse current (IPPM) of 4.6 A using the standardized 10/1000 µs double-exponential waveform. This value represents the maximum voltage that appears across the device during surge conduction and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMCG188A-E3/57T achieves this clamping level while maintaining low incremental resistance, which stabilizes VC across varying surge amplitudes.
Is SMCG188A-E3/57T suitable for automotive applications?
Yes, SMCG188A-E3/57T is AEC-Q101 qualified and explicitly rated for automotive under-hood use. Its construction includes glass-passivated junction, matte tin-plated leads compliant with JESD 22-B102, MSL Level 1 reflow compatibility, and operation up to +150 °C junction temperature - all verified per AEC-Q101 stress test conditions. The SMCG188A-E3/57T is commonly deployed in engine control units, body control modules, and ADAS power supplies where load dump and jump-start transients occur.
What does the "E3/57T" suffix mean in SMCG188A-E3/57T?
The "E3" suffix indicates RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 2 whisker resistance. The "57T" denotes packaging: 7-inch diameter plastic tape and reel containing 850 units, optimized for high-speed pick-and-place assembly. This configuration ensures consistent feeding, traceability, and compliance with IPC-7351 land pattern standards for the DO-215AB outline.
How does SMCG188A-E3/57T differ from bidirectional variants like SMCG188CA?
SMCG188A-E3/57T is unidirectional, with polarity marked by a cathode band and intended for DC line-to-ground protection; SMCG188CA is bidirectional, unmarked, and used for AC or differential-line protection where surges may occur in either polarity. Electrically, SMCG188CA has identical VWM (188 V) and VBR (209–231 V) but double the ID limit (2.0 µA) for VWM ≤10 V - irrelevant here since 188 V exceeds that threshold. The SMCG188A-E3/57T cannot substitute for SMCG188CA in AC-coupled signal paths.
What PCB layout guidance applies to SMCG188A-E3/57T for optimal thermal and electrical performance?
For optimal performance, SMCG188A-E3/57T must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, as specified in the datasheet for thermal derating and PPPM validation. Traces to the device should be short and wide to minimize inductance; ground connections must be low-impedance and directly tied to a solid ground plane. Avoid thermal relief on pads - full copper connection is required to achieve the stated RθJA of 75 °C/W and sustain 1500 W surge capability without junction overheating.
SMCG188A-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- 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 (SMCG)
SMCG188A-E3/57T FAQ
1.How can I place an order for SMCG188A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG188A-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 SMCG188A-E3/57T reliable?
The price and inventory of SMCG188A-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 SMCG188A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG188A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG188A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG188A-E3/57T?
SMCG188A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG188A-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 SMCG188A-E3/57T?
For technical support, including SMCG188A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG188A-E3/57T requirements.
6.How does Aetrix verify that SMCG188A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG188A-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 SMCG188A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG188A-E3/57T?
All SMCG188A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG188A-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 SMCG188A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG188A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG188A-E3/57T Tags
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