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Vishay General Semiconductor - Diodes Division SMCG51CA-M3/57T
- Part No.:
- SMCG51CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG51CA-M3/57T.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,994
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Product details
Overview
SMCG51CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on signal and power lines. It features a 51 V standoff voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 82.4 V at 18.2 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG51CA-M3/57T datasheet, SMCG51CA-M3/57T pinout, SMCG51CA-M3/57T application, or SMCG51CA-M3/57T equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line cards where bidirectional clamping, low leakage (<1 μA at VWM), and MSL Level 1 reflow compatibility are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (VBR min/max = 56.7 V / 62.7 V at 1 mA) and clamping characteristics. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns) to transients per ANSI/IEEE C62.35 standards.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets JESD201 Class 2 whisker resistance and is halogen-free (M3 suffix), RoHS-compliant, and UL 497B recognized (QVGQ2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 82.4 V at 18.2 A - Clamped voltage under 10/1000 µs surge; limits stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 1500 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity when properly laid out. |
| ID @ VWM | <1 μA - Ultra-low reverse leakage at rated standoff; prevents signal distortion or bias shift in high-impedance sensor paths. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package with 8.0 mm × 8.0 mm copper pad layout; optimized for automated placement and thermal dissipation. |
Pinout & Package
SMCG51CA-M3/57T uses the SMCG (DO-215AB) surface-mount package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking and functions identically in either orientation. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Conducts surge current during positive transients; connects to line being protected. |
| Cathode | Transient current entry point (negative half-cycle) | Conducts surge current during negative transients; connects to same line as anode-no directional routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns-ideal for CAN, LIN, RS-485, and sensor bridges. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring zero-failure reliability under thermal cycling and humidity. |
| Halogen-free (M3) | Meets IPC-1752A material declaration requirements and EU RoHS Annex II; eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a); improves clamping precision versus higher-Rsurge alternatives. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during PCB assembly. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Module |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp ±100 V transients before reaching ADC input or signal conditioner. Use Value: Maintains signal integrity below 82.4 V clamping while surviving 1500 W surges-enabling compliance with ISO 16750-2 and reducing need for secondary filtering. |
Use Scenario: Safeguarding 24 V DC digital inputs on PLC backplanes exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary surge suppression element across input terminals, coordinated with series impedance to limit let-through energy. Use Value: Withstands 200 A IFSM (unidirectional reference) and delivers consistent clamping across temperature, extending system uptime in factory automation settings. |
| Telecom Line Card Protection | Consumer USB Port ESD Hardening |
|
Use Scenario: Shielding RS-485 transceiver bus lines in outdoor base station equipment against lightning-induced surges up to 4 kV. IC Role / Device Role / Timing Role: First-line defense in multi-stage protection scheme-clamps common-mode transients before gas discharge tube or MOV stages. Use Value: 1 ns response time and 1500 W PPPM allow it to absorb initial surge energy faster than slower secondary protectors, improving overall system immunity. |
Use Scenario: Adding robust ESD protection to USB 2.0 data lines (D+/D−) in portable medical devices where human-body-model (HBM) >15 kV is required. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to connector to shunt ESD strikes before reaching USB PHY. Use Value: Sub-1 μA leakage preserves signal rise/fall times; 82.4 V VC ensures no false triggering during normal 3.3 V/5 V signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same VWM (51 V) and PPPM (1500 W), but SMA (DO-214AC) package; 20% larger footprint and higher RθJA (100 °C/W). | Limited to non-automotive industrial use due to lack of AEC-Q101 qualification; unsuitable for under-hood deployment. | Select when board space allows larger package and automotive qualification is not required. |
| SMCJ51CA | Higher PPPM (3000 W), same VWM and DO-214AB package; 50% higher clamping voltage (93 V) and no M3 halogen-free option. | Better for extreme surge environments (e.g., utility metering), but compromises signal-level protection due to elevated VC. | Choose only when 3000 W surge margin is mandatory and 93 V clamping is acceptable for protected ICs. |
Compared with SMAJ51CA and SMCJ51CA, SMCG51CA-M3/57T uniquely combines AEC-Q101 qualification, halogen-free construction, and optimized thermal resistance (RθJL = 15 °C/W) in the compact SMCG outline-making it the preferred choice for space-constrained, thermally demanding automotive and industrial designs.
Availability
SMCG51CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG51CA-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 SMCG series was engineered specifically for high-power, surface-mount transient suppression in automotive and industrial systems-balancing low clamping voltage, fast response, and rugged packaging for harsh-environment deployment.
FAQ
What is the clamping voltage of SMCG51CA-M3/57T and how is it measured?
The SMCG51CA-M3/57T has a maximum clamping voltage (VC) of 82.4 V, measured at a peak pulse current (IPPM) of 18.2 A using a standardized 10/1000 µs double-exponential waveform. This value reflects the actual voltage seen by protected circuitry during a surge event and is confirmed per ANSI/IEEE C62.35 test conditions. The SMCG51CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is SMCG51CA-M3/57T suitable for automotive applications?
Yes, SMCG51CA-M3/57T is AEC-Q101 qualified and explicitly rated for automotive use-including engine control, body electronics, and ADAS sensor interfaces. Its construction includes halogen-free molding compound (M3 suffix), matte tin-plated leads compliant with J-STD-002, and guaranteed operation from –55 °C to +150 °C. The SMCG51CA-M3/57T also carries UL 497B recognition for protector classification.
How does the bidirectional nature of SMCG51CA-M3/57T affect PCB layout?
The SMCG51CA-M3/57T has no polarity marking and functions identically in either orientation, simplifying PCB layout for AC-coupled or floating lines such as CAN bus, RS-485 differential pairs, or bridge sensor outputs. Layout requires symmetric 8.0 mm × 8.0 mm copper pads per terminal per Vishay's recommended footprint-no anode/cathode routing distinction is needed. The SMCG51CA-M3/57T eliminates the risk of incorrect orientation during assembly.
What is the meaning of the "M3" and "57T" suffixes in SMCG51CA-M3/57T?
The "M3" suffix indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, while "57T" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This configuration ensures compatibility with high-speed pick-and-place equipment and supports standard SMT reflow profiles up to 260 °C peak (MSL Level 1). The SMCG51CA-M3/57T is fully traceable and certified for industrial and automotive production.
Can SMCG51CA-M3/57T replace unidirectional TVS diodes in existing designs?
SMCG51CA-M3/57T can replace unidirectional TVS diodes only if the circuit topology is inherently symmetric or AC-coupled-for example, differential buses or transformer-isolated interfaces. In DC-biased circuits (e.g., 5 V power rail protection), a unidirectional device provides lower leakage and tighter clamping near VWM. The SMCG51CA-M3/57T offers no advantage in such cases and may increase standby current; verify signal polarity and bias conditions before substitution.
SMCG51CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCG51CA-M3/57T FAQ
1.How can I place an order for SMCG51CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG51CA-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 SMCG51CA-M3/57T reliable?
The price and inventory of SMCG51CA-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 SMCG51CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG51CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG51CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG51CA-M3/57T?
SMCG51CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG51CA-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 SMCG51CA-M3/57T?
For technical support, including SMCG51CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG51CA-M3/57T requirements.
6.How does Aetrix verify that SMCG51CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG51CA-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 SMCG51CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG51CA-M3/57T?
All SMCG51CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG51CA-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 SMCG51CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG51CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG51CA-M3/57T Tags
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