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Vishay General Semiconductor - Diodes Division SMC3K51CAHM3/57
- Part No.:
- SMC3K51CAHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K51CAHM3/57.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,356
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Product details
Overview
SMC3K51CAHM3/57 from Vishay General Semiconductor is a bidirectional surface-mount 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 at 1 mA test current, clamping voltage 82.4 V at 36.4 A peak pulse current, and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SMC3K51CAHM3/57 datasheet, SMC3K51CAHM3/57 pinout, SMC3K51CAHM3/57 application, or SMC3K51CAHM3/57 equivalent, key selection considerations include bidirectional clamping capability, 82.4 V max clamping under 36.4 A surge, AEC-Q101 qualification, RoHS/halogen-free HM3 suffix, and compatibility with automated SMT assembly per J-STD-002 and JESD 22-B102.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its bidirectional structure enables symmetrical clamping across both polarities without external polarity management.
Designed for high-energy transients, it delivers 3000 W peak pulse power with low incremental surge resistance and meets MSL level 1 per J-STD-020. The junction temperature range spans –55 °C to +150 °C, supporting under-hood automotive environments and industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy surges without failure in automotive load-dump or industrial switching scenarios |
| Breakdown Voltage VBR | 56.7–62.7 V at 1 mA - defines precise voltage threshold where clamping initiates |
| Stand-off Voltage VWM | 51 V - maximum continuous reverse working voltage before leakage exceeds 2 μA |
| Clamping Voltage VC | 82.4 V at 36.4 A IPPM - limits downstream IC/MOSFET voltage stress during worst-case surge |
| Operating Temperature Range | –55 °C to +150 °C - supports engine compartment and industrial ambient conditions |
| Qualification | AEC-Q101 qualified - validated for automotive reliability including temperature cycling and HTRB |
| Package | SMC (DO-214AB) - industry-standard 8.0 mm × 8.0 mm copper pad footprint, compatible with standard reflow profiles |
Pinout & Package
SMC3K51CAHM3/57 uses the SMC (DO-214AB) surface-mount package with two terminals: cathode and anode. As a bidirectional device, it has no polarity marking and functions identically regardless of orientation on PCB. Leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during positive transient | One side of symmetrical PN junction pair; connects to protected line without polarity constraint |
| Cathode | Current entry point during negative transient | Other side of symmetrical PN junction pair; completes bidirectional clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external diode pairing |
| 3000 W peak pulse rating | Handles severe load-dump transients per ISO 7637-2 and IEC 61000-4-5 Level 4 |
| AEC-Q101 qualification | Validated for automotive use including HTGB, TCT, and UHAST - reduces qualification burden for Tier 1 designs |
| Halogen-free, RoHS-compliant HM3 suffix | Meets global environmental compliance requirements and JESD201 Class 2 whisker resistance |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life before reflow; eliminates bake-out requirement for production |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails in body control modules against ISO 7637-2 load-dump pulses up to 120 V. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed upstream of DC/DC converters and microcontrollers. Use Value: Clamps peak voltage to ≤82.4 V at 36.4 A, preventing latch-up or gate oxide damage in downstream silicon. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential or single-ended signal lines exposed to relay coil flyback. Use Value: Sub-nanosecond response ensures clamping occurs before sensitive ADC inputs exceed absolute maximum ratings. |
| Telecom Power Feeding Protection | Consumer Device USB/Type-C Port Protection |
Use Scenario: Securing PoE-powered equipment (e.g., IP cameras) against surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan PSE output, coordinated with secondary TVS stages. Use Value: 3000 W rating absorbs multiple 10/1000 μs surges without degradation, extending field service life. |
Use Scenario: Adding robust ESD and surge immunity to USB Type-C receptacles in portable monitors and docking stations. IC Role / Device Role / Timing Role: Board-level bidirectional TVS placed at connector entry point, before EMI filters and USB controller. Use Value: 82.4 V clamping prevents damage to USB PD controllers during hot-plug or cable discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K51CAHM3_A/57 | Same electrical specs and AEC-Q101 qualification; updated suffix denotes revised internal revision control and traceability | No functional difference; intended for new designs replacing legacy SMC3K51CAHM3/57 | Select when sourcing newly released production lots with enhanced lot traceability |
| SMAJ51CA | Lower 400 W peak pulse power; SMA package (smaller footprint, lower thermal mass); same VBR range but higher clamping (93.6 V) | Suitable for space-constrained consumer or non-automotive applications with lower surge severity | Choose only if system-level surge testing confirms 400 W rating suffices and board layout cannot accommodate SMC size |
Compared with SMC3K51CAHM3/57, SMC3K51CAHM3_A/57 offers identical protection performance with improved manufacturing traceability, while SMAJ51CA trades surge robustness and thermal capacity for smaller size-making it unsuitable for automotive or industrial 3000 W surge environments.
Availability
SMC3K51CAHM3/57 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom PoE input staging, and consumer USB-C port surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K51CAHM3/57 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, efficiency, and application-specific optimization.
The SMC3KxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 3000 W surge handling are mandatory.
FAQ
What is the clamping voltage of SMC3K51CAHM3/57 at its rated peak pulse current?
The SMC3K51CAHM3/57 has a maximum clamping voltage (VC) of 82.4 V at 36.4 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during surge events, protecting downstream components such as microcontrollers and power MOSFETs from overvoltage stress.
Is SMC3K51CAHM3/57 suitable for automotive applications?
Yes, SMC3K51CAHM3/57 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS sensors. Its 150 °C maximum junction temperature, MSL Level 1 rating, and halogen-free HM3 construction meet stringent automotive reliability and environmental requirements-making SMC3K51CAHM3/57 appropriate for under-hood and cabin-mounted systems.
What does the "HM3" suffix mean in SMC3K51CAHM3/57?
The "HM3" suffix in SMC3K51CAHM3/57 indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It distinguishes this grade from commercial "M3" variants and confirms compliance with automotive-grade material and process standards-critical for SMC3K51CAHM3/57 deployment in safety-relevant vehicle subsystems.
Can SMC3K51CAHM3/57 be used in bidirectional signal line protection?
Yes, SMC3K51CAHM3/57 is inherently bidirectional and requires no polarity marking or orientation-dependent placement. It provides symmetrical clamping for AC-coupled interfaces, differential buses (e.g., CAN, RS-485), or floating sensor outputs-enabling simplified layout and eliminating the need for dual unidirectional TVS devices in SMC3K51CAHM3/57 implementations.
What is the standoff voltage rating for SMC3K51CAHM3/57?
The standoff voltage (VWM) for SMC3K51CAHM3/57 is 51 V, meaning it remains in high-impedance state with ≤2 μA leakage current up to this DC or RMS voltage. This allows reliable operation on 48 V industrial or 54 V telecom power rails while ensuring minimal standby power loss and no false triggering during normal operation of SMC3K51CAHM3/57.
SMC3K51CAHM3/57 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K51CAHM3/57 FAQ
1.How can I place an order for SMC3K51CAHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K51CAHM3/57 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 SMC3K51CAHM3/57 reliable?
The price and inventory of SMC3K51CAHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K51CAHM3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K51CAHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K51CAHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K51CAHM3/57?
SMC3K51CAHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K51CAHM3/57 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 SMC3K51CAHM3/57?
For technical support, including SMC3K51CAHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K51CAHM3/57 requirements.
6.How does Aetrix verify that SMC3K51CAHM3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K51CAHM3/57 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 SMC3K51CAHM3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K51CAHM3/57?
All SMC3K51CAHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K51CAHM3/57, 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 SMC3K51CAHM3/57 part is unused and in its original packaging.
Return procedure for SMC3K51CAHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K51CAHM3/57 Tags
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