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Vishay General Semiconductor - Diodes Division SMCJ17CA-M3/57T
- Part No.:
- SMCJ17CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CA-M3/57T.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,473
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Product details
Overview
SMCJ17CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 17 V standoff voltage (VWM), and 27.6 V clamping voltage (VC) at 54.3 A peak pulse current. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ17CA-M3/57T datasheet, SMCJ17CA-M3/57T pinout, SMCJ17CA-M3/57T application, or SMCJ17CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W 10/1000 µs surge rating, -55 °C to +150 °C operating junction temperature, and halogen-free RoHS-compliant M3 termination.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transients exceeding 17 V reverse standoff (VWM), it avalanches to clamp voltage at ≤27.6 V while diverting up to 54.3 A (10/1000 µs waveform). Its bidirectional symmetry ensures identical clamping in both polarities, eliminating polarity sensitivity in AC-coupled or floating signal paths.
Constructed with glass-passivated silicon junction and mounted on 8.0 mm × 8.0 mm copper pads, the device achieves low incremental surge resistance and fast response time (<1 ns), meeting MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 18.9 V / 20.9 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 27.6 V - Clamped voltage at 54.3 A peak pulse current; determines maximum stress on protected circuit |
| PPPM | 1500 W - Peak pulse power handling (10/1000 µs waveform); defines surge energy absorption capacity |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement |
| Polarity | Bidirectional - No cathode marking; symmetric clamping behavior for AC or differential signal protection |
Pinout & Package
SMCJ17CA-M3/57T uses the standard SMC (DO-214AB) package: two-terminal, surface-mount, unmarked bidirectional configuration. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during positive transient | One side of symmetrical PN junction; conducts when voltage exceeds +20.9 V or falls below -20.9 V |
| Cathode | Current entry terminal during negative transient | Other side of symmetrical PN junction; functionally identical to Anode in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR (18.9–20.9 V) and VC (27.6 V) in both directions, enabling protection of AC-coupled or floating interfaces without polarity concerns |
| 1500 W surge rating | Handles high-energy transients from inductive load switching or lightning-induced surges on power rails and data lines |
| Halogen-free M3 termination | Meets RoHS and JEDEC JESD201 Class 2 whisker resistance requirements; suitable for commercial and industrial production |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-related failure; eliminates bake requirement prior to assembly |
| Low thermal resistance | RθJL = 15 °C/W junction-to-lead enables efficient heat transfer to PCB copper pads during repetitive surge events |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt TVS placed across input rail to clamp spikes above 17 V before they reach downstream DC/DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤27.6 V during 54.3 A surges, preventing latch-up or gate oxide damage in automotive-grade ICs rated for 30 V absolute maximum. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across signal pair to suppress ±15 kV contact ESD per IEC 61000-4-2 without polarity alignment. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amps or ADC inputs experience overvoltage, preserving measurement integrity. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding Ethernet PHY interface transformers and PoE controllers from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS connected line-to-line and line-to-ground to absorb common-mode and differential-mode transients per IEC 61000-4-5. Use Value: 1500 W rating sustains multiple 10/1000 µs surges up to 4 kV (line-earth), maintaining isolation barrier integrity in telecom infrastructure. | Use Scenario: Front-end surge suppression in universal-input AC/DC adapters subjected to mains-borne transients per IEC 61000-4-4. IC Role / Device Role / Timing Role: Secondary-side TVS across bulk capacitor to prevent overvoltage propagation to primary-side controller during fast-rising line disturbances. Use Value: 17 V VWM aligns with 12–15 V DC bus levels, allowing normal operation while clamping >20 V spikes that could trigger OVP shutdown or damage optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (100 °C/W) | Restricted to lower-energy transients; unsuitable for load dump or high-current industrial surges | Select only where board space is critical and surge threat level is limited to IEC 61000-4-2 ESD only |
| SMCJ17A-M3/57T | Unidirectional variant; includes cathode band marking; same VWM, VC, and PPPM but asymmetric conduction | Requires polarity-aware layout; cannot protect AC signals or floating grounds without external diode pairing | Choose only for DC rails with known polarity and no need for bidirectional symmetry |
Compared with SMCJ17CA-M3/57T, SMAJ17CA-E3/57T trades surge robustness for compactness, while SMCJ17A-M3/57T sacrifices bidirectionality for marginally lower cost-neither offers drop-in replacement capability due to differing package thermal performance or polarity constraints.
Availability
SMCJ17CA-M3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal conditioning, telecom line interface protection, and consumer power adapter input stage applications requiring stable component supply and halogen-free compliance.
Supply support for SMCJ17CA-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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and AEC-Q qualification.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where 1500 W surge immunity and extended temperature operation are mandatory.
FAQ
What is the clamping voltage of SMCJ17CA-M3/57T at its rated peak pulse current?
The SMCJ17CA-M3/57T has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 54.3 A under the standard 10/1000 µs waveform. This value is measured at 25 °C ambient and confirms the device's ability to limit transient overvoltage to a safe level for downstream 30 V-rated components. The SMCJ17CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is SMCJ17CA-M3/57T suitable for automotive applications?
Yes, SMCJ17CA-M3/57T is suitable for automotive applications as a commercial-grade part; however, the AEC-Q101 qualified version requires the HM3 suffix (e.g., SMCJ17CAHM3_X). The SMCJ17CA-M3/57T itself meets MSL Level 1, operates from -55 °C to +150 °C, and handles load dump transients per ISO 7637-2, but formal automotive qualification requires the HM3 variant. Always verify qualification status for safety-critical vehicle subsystems using the SMCJ17CA-M3/57T.
How does the bidirectional design of SMCJ17CA-M3/57T affect PCB layout?
The bidirectional design of SMCJ17CA-M3/57T eliminates polarity marking-no cathode band is present-and allows placement across any two nodes without orientation concern. This simplifies layout for AC-coupled interfaces, differential pairs, or floating grounds, reducing risk of misorientation during assembly. Unlike unidirectional variants such as SMCJ17A-M3/57T, the SMCJ17CA-M3/57T avoids the need for duplicate devices or external series diodes to achieve symmetrical protection.
What is the thermal resistance from junction to ambient for SMCJ17CA-M3/57T?
The typical thermal resistance from junction to ambient (RθJA) for SMCJ17CA-M3/57T is 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pad per terminal. This value assumes standard FR-4 PCB with no internal planes; actual RθJA improves significantly with additional copper area or internal ground/power planes. For thermal design validation, use RθJL = 15 °C/W (junction-to-lead) as the more stable metric when heatsinking via PCB traces.
Does SMCJ17CA-M3/57T meet RoHS and halogen-free requirements?
Yes, SMCJ17CA-M3/57T is halogen-free and RoHS-compliant, indicated by the "M3" suffix per Vishay's ordering nomenclature. It satisfies JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability for the molding compound. The device contains no brominated flame retardants or chlorine-based additives, making it compliant with major environmental directives including EU RoHS Directive 2011/65/EU and China RoHS II.
SMCJ17CA-M3/57T 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 54.3A
- 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 (SMC)
SMCJ17CA-M3/57T FAQ
1.How can I place an order for SMCJ17CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CA-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 SMCJ17CA-M3/57T reliable?
The price and inventory of SMCJ17CA-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 SMCJ17CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ17CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CA-M3/57T?
SMCJ17CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CA-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 SMCJ17CA-M3/57T?
For technical support, including SMCJ17CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ17CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ17CA-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 SMCJ17CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ17CA-M3/57T?
All SMCJ17CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CA-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 SMCJ17CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ17CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CA-M3/57T Tags
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