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Vishay General Semiconductor - Diodes Division SMCJ13CA-E3/9AT
- Part No.:
- SMCJ13CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ13CA-E3/9AT.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,848
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Product details
Overview
SMCJ13CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 13 V standoff voltage (VWM), 21.5 V maximum clamping voltage (VC) at 69.8 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ13CA-E3/9AT datasheet, SMCJ13CA-E3/9AT pinout, SMCJ13CA-E3/9AT application, or SMCJ13CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.65), AEC-Q101 qualification eligibility, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 14.4–15.9 V (min/max) under 1 mA test current. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time (<1 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching transients before downstream ICs are damaged.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient, on recommended pad layout) and RθJL = 15 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's normal operating range. |
| VBR (min/max) | 14.4 V / 15.9 V - Breakdown occurs within this band at 1 mA; defines threshold where TVS transitions from high-impedance to low-impedance clamping state. |
| VC @ IPPM | 21.5 V - Clamped voltage across terminals at 69.8 A peak pulse; determines maximum stress imposed on protected load during surge. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; enables survival of high-energy transients without failure. |
| IPPM | 69.8 A - Corresponding peak pulse current at VC; used with PCB trace width and fuse coordination to ensure system-level surge resilience. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.13 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal dissipation via copper pads. |
Pinout & Package
SMCJ13CA-E3/9AT uses the standard SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking. Both terminals are electrically symmetrical; neither is designated anode or cathode. The molded case has matte tin-plated leads compatible with lead-free reflow profiles up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connected across protected line (e.g., CAN_H/CAN_L, RS-485 A/B, or DC supply rail); conducts surge current bidirectionally to ground or rail. |
| Terminal 2 | Transient input/output node | Second connection point completing the parallel protection path; identical electrical role to Terminal 1 due to bidirectional symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential buses (e.g., CAN, RS-485) without polarity concerns or external diode pairing. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when mounted on 8 mm × 8 mm copper pads. |
| Low clamping ratio (1.65) | VC/VWM = 21.5/13 ensures minimal overvoltage overshoot during clamping - critical for safeguarding 12 V logic and microcontroller I/O. |
| AEC-Q101 qualification path | Base P/NHE3 suffix variants are AEC-Q101 qualified; SMCJ13CA-E3/9AT shares identical die and construction, enabling automotive-grade qualification with minor suffix change. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied control modules from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Parallel-connected TVS that clamps transients above 13 V to ≤21.5 V, shielding MCU power inputs and LDO regulators. Use Value: Prevents latch-up or permanent damage to 12 V-rated silicon during 120 V/400 ms load dump events without requiring series impedance. | Use Scenario: Safeguarding analog output lines (4–20 mA) and digital sensor interfaces (I²C, SPI) in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional shunt element placed at connector entry point to divert ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Maintains signal integrity with <1 µA leakage at 13 V, while clamping fast transients (<1 ns response) before they propagate into precision ADC front-ends. |
| Telecom Data Line Surge Suppression | Consumer Device USB Port Protection |
Use Scenario: Hardening RS-485 communication links in outdoor security cameras exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode protector across A/B lines, leveraging bidirectional symmetry to handle polarity-reversing surges without rectification. Use Value: Delivers 1500 W surge handling per line pair - exceeds IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) requirements for Class B equipment. | Use Scenario: Adding secondary overvoltage protection on VBUS and D+/D− lines of USB-C ports in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) shunt clamp that activates only during overvoltage events, avoiding signal distortion during normal 5 V operation. Use Value: Enables robust ESD immunity (±15 kV air, ±8 kV contact) while maintaining USB 2.0 signal rise/fall times and eye diagram compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC13CA | Same VWM (13 V) and VC (21.5 V), but lower PPPM = 500 W and smaller SMA package (DO-214AC); higher RθJA = 120 °C/W. | Restricted to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for IEC 61000-4-5 or load dump. | Select SAC13CA only for space-constrained consumer designs where 1500 W rating is unnecessary. |
| SMCJ13A-E3/9AT | Unidirectional variant with identical VWM, VBR, VC, and PPPM; includes cathode band marking and forward conduction capability. | Requires correct polarity orientation; usable in DC-biased rails where reverse conduction must be blocked. | Choose SMCJ13A-E3/9AT when protecting unidirectional supplies (e.g., 12 V input to buck converter) and reverse leakage must be minimized below 1 µA. |
Compared with SAC13CA, SMCJ13CA-E3/9AT delivers triple the surge power handling and superior thermal dissipation for harsh environments; versus SMCJ13A-E3/9AT, it eliminates polarity dependency - simplifying layout and enabling universal use on AC-coupled or differential signal paths.
Availability
SMCJ13CA-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom data line hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ13CA-E3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637, IEC 61000-4-5, and ESD events is non-negotiable.
FAQ
What is the clamping voltage of SMCJ13CA-E3/9AT at its rated peak pulse current?
The SMCJ13CA-E3/9AT clamps to a maximum of 21.5 V when subjected to its rated peak pulse current of 69.8 A using a 10/1000 µs waveform. This value is measured across the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ13CA-E3/9AT maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMCJ13CA-E3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
SMCJ13CA-E3/9AT uses the same die, package, and process as AEC-Q101-qualified variants (e.g., SMCJ13CAHE3_A/I). While the -E3/9AT suffix denotes RoHS-compliant commercial grade, the underlying construction meets AEC-Q101 stress test requirements. For production automotive use, specify the HE3 suffix; SMCJ13CA-E3/9AT serves as a drop-in evaluation and industrial alternative with identical electrical behavior. The SMCJ13CA-E3/9AT datasheet confirms MSL Level 1 and 260 °C reflow compatibility required for automotive assembly.
How does the bidirectional nature of SMCJ13CA-E3/9AT affect its use on differential signal lines like RS-485?
The bidirectional design of SMCJ13CA-E3/9AT allows it to protect both conductors of a differential pair (e.g., RS-485 A and B) with a single device placed across the pair - eliminating the need for two unidirectional TVS diodes and associated layout complexity. During a surge, it clamps equally in either polarity, suppressing common-mode and differential-mode transients without polarity misalignment risk. This makes SMCJ13CA-E3/9AT ideal for protecting full-duplex industrial buses where signal inversion or floating grounds may occur. The SMCJ13CA-E3/9AT achieves this with no markings or orientation constraints.
What is the thermal resistance of SMCJ13CA-E3/9AT, and how does it impact PCB layout?
SMCJ13CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes FR-4 board material and still-air conditions. To maintain TJ ≤ 150 °C during repetitive surges, designers must allocate sufficient copper area and consider airflow or nearby heat sources. Reducing pad size increases RθJA, directly raising junction temperature - potentially derating PPPM. The SMCJ13CA-E3/9AT thermal model is validated per JEDEC standards and referenced in Vishay Document 88394.
Can SMCJ13CA-E3/9AT replace SMCJ13A-E3/9AT in an existing design without layout changes?
Yes - SMCJ13CA-E3/9AT is physically identical to SMCJ13A-E3/9AT in SMC (DO-214AB) package, pinout, and mounting dimensions, enabling direct substitution without PCB modifications. The only functional difference is polarity: SMCJ13A-E3/9AT is unidirectional (cathode-banded) and conducts forward current, while SMCJ13CA-E3/9AT is bidirectional with no marking and symmetrical clamping. If the original design relies on forward conduction (e.g., reverse-polarity protection), retain SMCJ13A-E3/9AT; otherwise, SMCJ13CA-E3/9AT offers greater flexibility. Both share identical VWM, VC, and PPPM ratings.
SMCJ13CA-E3/9AT 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 69.8A
- 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)
SMCJ13CA-E3/9AT FAQ
1.How can I place an order for SMCJ13CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ13CA-E3/9AT 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 SMCJ13CA-E3/9AT reliable?
The price and inventory of SMCJ13CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ13CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ13CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ13CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ13CA-E3/9AT?
SMCJ13CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ13CA-E3/9AT 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 SMCJ13CA-E3/9AT?
For technical support, including SMCJ13CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ13CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ13CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ13CA-E3/9AT 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 SMCJ13CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ13CA-E3/9AT?
All SMCJ13CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ13CA-E3/9AT, 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 SMCJ13CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ13CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ13CA-E3/9AT Tags
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