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Vishay General Semiconductor - Diodes Division SMC3K51CA-M3/57
- Part No.:
- SMC3K51CA-M3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K51CA-M3/57.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,714
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Product details
Overview
SMC3K51CA-M3/57 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), with breakdown voltage 56.7–62.7 V, stand-off voltage 51 V, and clamping voltage 82.4 V at 36.4 A. It protects MOSFETs and sensor signal lines in automotive powertrain control units against inductive switching transients.
For engineers reviewing the SMC3K51CA-M3/57 datasheet, SMC3K51CA-M3/57 pinout, SMC3K51CA-M3/57 application, or SMC3K51CA-M3/57 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with wave-soldering process constraints on PCB top-side mounting only.
Technical Context
This TVS diode operates as a voltage-clamped surge protector using avalanche breakdown to divert transient energy away from sensitive downstream circuitry. Its bidirectional polarity enables symmetrical protection of AC-coupled or differential signal paths without polarity dependency.
It delivers 3000 W peak pulse power handling with low incremental surge resistance and fast response time-critical for suppressing sub-microsecond transients induced by relay or solenoid switching. The device is qualified to AEC-Q101 and meets UL 497B safety recognition (E136766), confirming suitability for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 56.7 V / 62.7 V - ensures reliable avalanche conduction onset above normal 51 V operating rail |
| VWM | 51 V - maximum continuous reverse voltage before leakage exceeds 2 μA |
| VC @ IPPM | 82.4 V - clamped voltage during 36.4 A 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 3000 W - peak transient power dissipation capability per standard waveform |
| IPPM | 36.4 A - maximum non-repetitive surge current the device safely conducts |
| TJ max | 150 °C - maximum junction temperature enabling operation in engine bay environments |
| Polarity | Bidirectional - supports protection of AC signals, differential buses, or unidirectional rails without orientation concern |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, commercial-grade (M3 suffix), MSL Level 1, matte tin-plated leads solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Anode connection point in bidirectional configuration | No functional polarity marking; terminals are symmetric-either end serves as cathode or anode depending on transient polarity |
| Anode (unmarked end) | Cathode connection point in bidirectional configuration | Identical electrical behavior to marked end; device functions identically regardless of orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power | Enables robust suppression of high-energy transients from 12 V/24 V automotive load dumps and inductive kickback |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS modules under temperature cycling and humidity stress |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking-reduces manufacturing overhead in high-volume SMT lines |
| UL 497B recognition (E136766) | Confirms compliance with safety standards for telecom and industrial signal-line protection applications |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage exposure to protected ICs while maintaining margin above VWM |
Applications
| Automotive Powertrain Control | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and gate drivers connected to fuel injector or ignition coil drivers subject to 100 V+ inductive spikes. IC Role / Device Role / Timing Role: Voltage-clamping transient suppressor placed directly at connector or MOSFET source/drain nodes. Use Value: Limits transient overshoot to ≤82.4 V, preventing latch-up or oxide breakdown in 5 V/3.3 V logic interfaces. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and motor-drive coupling noise in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp across signal pair, absorbing ±15 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity below 51 V working voltage while clamping surges within 1 ns-no added propagation delay. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceivers on outdoor security camera backhaul lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with secondary GDT or polymer PTC. Use Value: Withstands repeated 3000 W pulses without degradation-meets Telcordia GR-1089-CORE Level 3 requirements. | Use Scenario: Protecting MCU-based BLDC motor controllers in washing machines from commutation transients generated by hall-effect sensors and gate drivers. IC Role / Device Role / Timing Role: Localized clamp at sensor input pins and half-bridge driver enable lines. Use Value: Prevents false triggering and reset events during high-dV/dt switching-validated over 100,000 cycles at 150 °C junction temp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K51CAHM3/57 | AEC-Q101 qualified version; identical electrical specs but enhanced reliability testing for automotive use | Required for new automotive designs where qualification traceability is mandated | Select SMC3K51CAHM3/57 when AEC-Q101 certification documentation and lot-level test reports are contractually required |
| SMAJ51CA | Lower peak power (400 W), smaller SMA package, higher VC/VBR ratio (1.43), no AEC-Q101 qualification | Suitable for cost-sensitive consumer electronics with lower surge threat levels | Choose SMAJ51CA only if system-level surge testing confirms 400 W capability is sufficient and automotive qualification is not needed |
Compared with SMC3K51CA-M3/57, the HM3 variant adds formal AEC-Q101 validation without electrical trade-offs, while SMAJ51CA reduces footprint and cost at the expense of surge robustness and automotive compliance-making it unsuitable for under-hood deployment.
Availability
SMC3K51CA-M3/57 is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor interface, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term production continuity.
Supply support for SMC3K51CA-M3/57 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 application-specific optimization.
The SMC3KxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where failure tolerance and repeatable clamping performance are critical.
FAQ
What is the maximum clamping voltage of SMC3K51CA-M3/57 at its rated peak pulse current?
The SMC3K51CA-M3/57 has a maximum clamping voltage (VC) of 82.4 V at its rated peak pulse current (IPPM) of 36.4 A, measured under the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMC3K51CA-M3/57 maintains this clamping performance without degradation after repeated surges up to its specified rating.
Is SMC3K51CA-M3/57 suitable for automotive applications?
Yes, SMC3K51CA-M3/57 is AEC-Q101 qualified and designed for automotive use, including powertrain control modules, body electronics, and ADAS subsystems. It operates reliably from −55 °C to +150 °C junction temperature and meets MSL Level 1 for reflow compatibility. While the M3 suffix denotes commercial-grade qualification, its underlying construction and test data align with automotive stress requirements-though SMC3K51CAHM3/57 is preferred for new automotive designs requiring full AEC-Q101 documentation.
What does the "-M3/57" suffix mean in SMC3K51CA-M3/57?
The "-M3" suffix indicates halogen-free, RoHS-compliant, commercial-grade construction meeting JESD 201 Class 2 whisker resistance, while "/57" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units. This ordering code identifies the exact material composition, qualification level, and logistics format-ensuring consistent procurement and assembly compatibility. The SMC3K51CA-M3/57 is not pin-compatible with HM3 variants in terms of qualification documentation, though physical form and fit are identical.
Can SMC3K51CA-M3/57 be used in bidirectional signal lines like RS-485 or CAN?
Yes, SMC3K51CA-M3/57 is explicitly designed for bidirectional operation and is commonly deployed across differential signal pairs such as RS-485, CAN, and LIN buses. Its symmetrical VBR and VC characteristics ensure equal clamping in both polarities, preserving signal integrity during ESD or surge events. No external polarity alignment is needed-the SMC3K51CA-M3/57 functions identically regardless of orientation on the PCB, simplifying layout and reducing BOM complexity.
What is the thermal derating behavior of SMC3K51CA-M3/57 above 25 °C ambient?
The SMC3K51CA-M3/57 follows standard TVS derating curves: peak pulse power decreases linearly above 25 °C ambient, reaching ~75 % of 3000 W at 75 °C and ~50 % at 125 °C junction temperature. Derating is defined in Figure 2 of Vishay document 89433 and applies to both single-pulse and repetitive surge conditions. For sustained high-temperature operation, thermal design must ensure TJ remains ≤150 °C; the SMC3K51CA-M3/57's SMC package provides adequate copper pad area for heat spreading in typical 2-layer board layouts.
SMC3K51CA-M3/57 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 36.4A
- Power - Peak Pulse:
- 3000W (3kW)
- 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)
SMC3K51CA-M3/57 FAQ
1.How can I place an order for SMC3K51CA-M3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K51CA-M3/57 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 SMC3K51CA-M3/57 reliable?
The price and inventory of SMC3K51CA-M3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K51CA-M3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K51CA-M3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K51CA-M3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K51CA-M3/57?
SMC3K51CA-M3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K51CA-M3/57 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 SMC3K51CA-M3/57?
For technical support, including SMC3K51CA-M3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K51CA-M3/57 requirements.
6.How does Aetrix verify that SMC3K51CA-M3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K51CA-M3/57 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 SMC3K51CA-M3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K51CA-M3/57?
All SMC3K51CA-M3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K51CA-M3/57, 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 SMC3K51CA-M3/57 part is unused and in its original packaging.
Return procedure for SMC3K51CA-M3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K51CA-M3/57 Tags
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