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Vishay General Semiconductor - Diodes Division SMCJ51CA-E3/57T
- Part No.:
- SMCJ51CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ51CA-E3/57T.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
SMCJ51CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 51 V standoff voltage (VWM), 82.4 V maximum clamping voltage (VC) at 18.2 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), making it suitable for automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ51CA-E3/57T datasheet, SMCJ51CA-E3/57T pinout, SMCJ51CA-E3/57T application, or SMCJ51CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ51CA-E3/57T operates as a silicon avalanche diode with symmetrical breakdown in both polarities, enabling robust protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR (56.7–62.7 V at 1 mA) and low leakage (<1 µA at 51 V), while its low Rdyn supports fast clamping response under IEC 61000-4-5 surge conditions.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, allowing reliable operation up to TJ = 150 °C when mounted per recommended pad layout. The device meets MSL Level 1 (260 °C reflow peak) and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 56.7 V / 62.7 V at 1 mA - Ensures consistent breakdown threshold across production lots |
| VC @ IPPM | 82.4 V at 18.2 A - Limits downstream voltage stress during 10/1000 µs surges |
| PPPM | 1500 W - Withstands high-energy transients common in automotive load-dump and inductive switching |
| IPPM | 18.2 A - Peak surge current capability under standardized 10/1000 µs waveform |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 8.13 mm footprint and 3.20 mm height |
Pinout & Package
SMCJ51CA-E3/57T uses the SMC (DO-214AB) package: a surface-mount, bidirectional two-terminal device with no polarity marking. Terminals are matte tin-plated leads compatible with standard reflow profiles (MSL Level 1, 260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive surges and anode during negative surges - no fixed polarity |
| Cathode | Transient return path (bidirectional) | Identical electrical role to Anode; terminals are functionally symmetric for AC/DC line protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity requirements for industrial and automotive interfaces |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1 µA) over temperature and lifetime |
| Low incremental surge resistance | Minimizes clamping overshoot during fast-rising transients (e.g., ESD, lightning-induced spikes) |
| AEC-Q101 qualification option | Base P/NHE3 variant available for automotive applications requiring qualified TVS components |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and DC/DC converter input stage. Use Value: Clamps 12 V rail to ≤82.4 V during 1500 W surges, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential or single-ended signal traces near connector entry points. Use Value: Maintains signal integrity by limiting transient voltage to <82.4 V with sub-nanosecond response, avoiding latch-up in precision ADC front-ends. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to unshielded outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on data line pairs, coordinated with primary GDT or polymer PTC. Use Value: Provides precise 51 V standoff and symmetrical clamping to prevent false triggering while suppressing induced surges up to 1500 W. | Use Scenario: Input-stage surge suppression in wall-mounted AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: First-line defense on secondary-side DC output rails feeding USB-C PD controllers or PMICs. Use Value: Absorbs repetitive surges from mains transients without degradation, supporting >1000 surge events per MIL-STD-883H Method 3015.8. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC51CA | Lower PPPM (500 W), same VWM/VC, smaller SMA package | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade surge environments | Select when board space is constrained and surge energy is ≤500 W |
| 1.5KE51CA | Through-hole DO-201 package, identical VWM/VC, PPPM = 1500 W | Requires wave soldering or hand assembly; incompatible with high-speed SMT lines | Select only for legacy through-hole designs or prototyping where rework tolerance is prioritized |
Compared with SAC51CA and 1.5KE51CA, the SMCJ51CA-E3/57T delivers identical clamping performance in a RoHS-compliant, MSL Level 1 SMC package optimized for automated manufacturing, higher thermal dissipation, and automotive-grade reliability - making it the preferred choice for volume SMT production targeting industrial and automotive end equipment.
Availability
SMCJ51CA-E3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line interface surge suppression requiring stable component supply and full traceability.
Supply support for SMCJ51CA-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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2, IEC 61000-4-5, and AEC-Q101 stress conditions is mandatory.
FAQ
What is the standoff voltage rating of the SMCJ51CA-E3/57T?
The SMCJ51CA-E3/57T has a maximum reverse standoff voltage (VWM) of 51 V, meaning it remains non-conductive under normal operating conditions up to this DC or RMS voltage. This value is confirmed in the Vishay datasheet Document Number 88394, Table "ELECTRICAL CHARACTERISTICS", row for SMCJ51CA. The device begins clamping above this threshold, with guaranteed breakdown between 56.7 V and 62.7 V at 1 mA test current.
Is the SMCJ51CA-E3/57T suitable for automotive applications?
Yes - the SMCJ51CA-E3/57T is RoHS-compliant and manufactured to Vishay's commercial-grade specifications; an AEC-Q101-qualified version is available under ordering code SMCJ51CAHE3_A/H. While the -E3/57T suffix itself is not AEC-Q101 certified, its construction (glass-passivated junction, MSL Level 1, 150 °C TJ max) aligns with automotive environmental requirements, and many Tier 1 suppliers deploy it in non-safety-critical modules with internal qualification.
What is the clamping voltage of the SMCJ51CA-E3/57T at its rated peak pulse current?
The SMCJ51CA-E3/57T clamps to a maximum of 82.4 V at its rated peak pulse current of 18.2 A (10/1000 µs waveform), as specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay document 88394. This clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does the SMCJ51CA-E3/57T have polarity markings on the package?
No - the SMCJ51CA-E3/57T is a bidirectional TVS diode and carries no polarity marking (e.g., cathode band) on the SMC (DO-214AB) case. Its symmetrical construction means both terminals are electrically identical, allowing installation in either orientation on PCBs. This simplifies layout and eliminates risk of reverse installation errors in production.
What is the thermal resistance from junction to ambient for the SMCJ51CA-E3/57T?
The SMCJ51CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal), per Vishay Document 88394, "THERMAL CHARACTERISTICS" table. This value assumes still air convection and is used to calculate steady-state junction temperature rise under DC power dissipation (PD = 6.5 W).
SMCJ51CA-E3/57T 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):
- 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 (SMCJ)
SMCJ51CA-E3/57T FAQ
1.How can I place an order for SMCJ51CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ51CA-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 SMCJ51CA-E3/57T reliable?
The price and inventory of SMCJ51CA-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 SMCJ51CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ51CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ51CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ51CA-E3/57T?
SMCJ51CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ51CA-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 SMCJ51CA-E3/57T?
For technical support, including SMCJ51CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ51CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ51CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ51CA-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 SMCJ51CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ51CA-E3/57T?
All SMCJ51CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ51CA-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 SMCJ51CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ51CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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