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Vishay General Semiconductor - Diodes Division SMCG51A-M3/57T
- Part No.:
- SMCG51A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG51A-M3/57T.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,977
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Product details
Overview
SMCG51A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features a 51 V stand-off voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 82.4 V maximum clamping voltage at 18.2 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG51A-M3/57T datasheet, SMCG51A-M3/57T pinout, SMCG51A-M3/57T application, or SMCG51A-M3/57T equivalent, this device is selected for robust overvoltage protection in DC power rails, automotive sensor interfaces, and industrial I/O circuits where low clamping voltage, high surge current capability, and halogen-free RoHS compliance are required.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior under repetitive surge stress. Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–55 °C to +150 °C) support operation on standard PCB copper pads (8.0 mm × 8.0 mm per terminal) without forced cooling.
The SMCG51A-M3/57T delivers sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of inductive switching spikes and lightning-induced surges per IEC 61000-4-5. Its M3 suffix confirms halogen-free, RoHS-compliant construction and JESD201 Class 2 whisker resistance - critical for automotive and industrial long-life deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - Tight breakdown window ensures predictable turn-on and minimal overvoltage exposure during transients. |
| VC @ IPPM | 82.4 V at 18.2 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to <83 V during worst-case 1500 W events. |
| PPPM | 1500 W - Peak pulse power handling per standard 10/1000 µs waveform; supports Level 4 IEC 61000-4-5 (4 kV line-to-ground). |
| ID @ VWM | 1.0 µA - Ultra-low leakage at rated stand-off; avoids measurable power loss or bias shift in high-impedance sensor circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with gull-wing leads; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
SMCG51A-M3/57T uses the SMCG (DO-215AB) surface-mount package: 2-terminal gull-wing configuration, 7.11 mm × 3.17 mm body, 1.02 mm max height, matte tin-plated leads compliant with J-STD-002 solderability. Polarity is marked by a cathode band on the anode-end side; cathode connects to protected circuit ground or return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (input side) | Connected to line being protected (e.g., 48 V supply rail); conducts surge current toward cathode during overvoltage. |
| Cathode | Clamp reference node | Connected to system ground or low-impedance return; establishes clamping threshold relative to reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails per stress test requirements. |
| Halogen-free & RoHS compliant (M3) | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance - suitable for green manufacturing and export compliance. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 25.7 V) versus competing TVS devices, reducing voltage overshoot across protected ICs. |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture sensitivity concerns - eliminates baking requirement and streamlines SMT production. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature, with minimal parameter drift after 1000+ surge cycles at rated PPPM. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load-dump and jump-start transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤82.4 V during 1500 W surges, preventing damage to downstream 65 V-rated MOSFETs and controllers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 24 V sensor supply line, located adjacent to connector entry point. Use Value: Sub-ns response and 1.0 µA leakage preserve signal integrity and avoid loading of high-impedance ratiometric sensor bridges. |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
Use Scenario: Safeguarding -48 V telecom rectifier outputs against lightning-induced common-mode surges on central office equipment. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail, referenced to chassis ground with low-inductance layout. Use Value: 1500 W rating meets GR-1089-CORE Level 3 (2 kV/10 Ω) requirements while maintaining <100 V clamping ceiling. |
Use Scenario: Protecting gate-drive signals (e.g., PWM inputs to half-bridge drivers) from cross-talk and inductive kickback in BLDC inverters. IC Role / Device Role / Timing Role: Local TVS on isolated gate driver supply or logic input, mounted within 5 mm of IC pin. Use Value: DO-215AB footprint enables placement directly at connector or header, minimizing loop inductance and preserving fast edge fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/57T (Vishay) | Same VWM/VBR/VC specs but in SMA (DO-214AC) package; RθJA = 85 °C/W vs. 75 °C/W; no AEC-Q101 qualification. | Limited to industrial/commercial use; less suitable for under-hood automotive due to lower thermal performance and qualification gap. | Select when cost-sensitive non-automotive designs require legacy SMA footprint compatibility and reduced thermal demands. |
| 1.5SMC51A (ON Semiconductor) | Identical electrical specs (VWM = 51 V, VC = 82.4 V), same DO-215AB package, but rated at 1500 W with MSL Level 1 and RoHS - not AEC-Q101 qualified. | Acceptable for industrial automation and telecom where automotive qualification is not mandated. | Choose for second-source assurance in non-automotive BOMs; verify traceability and lot-level compliance documentation. |
Compared with SMAJ51A-E3/57T and 1.5SMC51A, SMCG51A-M3/57T uniquely combines AEC-Q101 qualification, halogen-free construction, and superior thermal resistance (75 °C/W) - making it the only option qualified for mission-critical automotive power rail protection without derating.
Availability
SMCG51A-M3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SMCG51A-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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific validation.
The SMCG series was engineered for high-energy transient suppression in space-constrained, high-reliability applications - particularly automotive power distribution, industrial I/O protection, and telecom infrastructure where AEC-Q101 and thermal robustness are mandatory.
FAQ
What is the clamping voltage of SMCG51A-M3/57T at its rated peak pulse current?
The SMCG51A-M3/57T has a maximum clamping voltage (VC) of 82.4 V at its specified peak pulse current (IPPM) of 18.2 A under the standard 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, ensuring realistic thermal conditions. The clamping performance is guaranteed across the full operating temperature range (–55 °C to +150 °C), and SMCG51A-M3/57T maintains this specification without derating up to TJ = 125 °C.
Is SMCG51A-M3/57T suitable for automotive applications?
Yes, SMCG51A-M3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor power supplies. Its halogen-free (M3) construction, MSL Level 1 rating, and guaranteed operation from –55 °C to +150 °C meet stringent automotive environmental and process requirements. The SMCG51A-M3/57T datasheet includes full qualification test reports per AEC-Q101 Rev D, confirming reliability under temperature cycling, humidity, and mechanical shock.
How does the SMCG51A-M3/57T differ from the SMAJ51A-E3/57T?
While both devices share identical VWM (51 V), VBR (56.7–62.7 V), and VC (82.4 V) specifications, SMCG51A-M3/57T uses the larger DO-215AB (SMCG) package with lower thermal resistance (RθJA = 75 °C/W vs. 85 °C/W), is AEC-Q101 qualified, and carries the halogen-free M3 suffix. In contrast, SMAJ51A-E3/57T uses the smaller DO-214AC (SMA) package and lacks automotive qualification. SMCG51A-M3/57T also features improved surge robustness due to its optimized chip junction and leadframe design.
What is the maximum leakage current of SMCG51A-M3/57T at its stand-off voltage?
The SMCG51A-M3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 51 V and TA = 25 °C. This ultra-low leakage remains below 5 µA even at +125 °C, ensuring minimal impact on high-impedance sensor bias networks or battery-powered circuits. The specification is verified per ANSI/IEEE C62.35 and confirmed in the Vishay 88457 datasheet Table on page 2.
Can SMCG51A-M3/57T be used in bidirectional configurations?
No, SMCG51A-M3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode-band marking. For bidirectional operation, Vishay offers the SMCG51CA variant (e.g., SMCG51CA-M3/57T), which provides symmetrical clamping in both polarities with identical VWM and VC ratings. Using SMCG51A-M3/57T in reverse-biased AC applications would result in forward conduction and potential failure; always match device polarity to circuit topology.
SMCG51A-M3/57T 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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- 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)
SMCG51A-M3/57T FAQ
1.How can I place an order for SMCG51A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG51A-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 SMCG51A-M3/57T reliable?
The price and inventory of SMCG51A-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 SMCG51A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG51A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG51A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG51A-M3/57T?
SMCG51A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG51A-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 SMCG51A-M3/57T?
For technical support, including SMCG51A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG51A-M3/57T requirements.
6.How does Aetrix verify that SMCG51A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG51A-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 SMCG51A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG51A-M3/57T?
All SMCG51A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG51A-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 SMCG51A-M3/57T part is unused and in its original packaging.
Return procedure for SMCG51A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG51A-M3/57T Tags
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