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Vishay General Semiconductor - Diodes Division SMCJ15C-E3/9AT
- Part No.:
- SMCJ15C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15C-E3/9AT.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,843
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Product details
Overview
SMCJ15C-E3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for clamping voltage transients on signal or power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 61.5 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line cards against ESD and inductive switching surges.
For engineers reviewing the SMCJ15C-E3/9AT datasheet, SMCJ15C-E3/9AT pinout, SMCJ15C-E3/9AT application, or SMCJ15C-E3/9AT equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification for automotive use, RoHS-compliant matte tin plating, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ15C-E3/9AT operates as a silicon avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
It delivers sub-nanosecond response time to transients and maintains low incremental surge resistance (typical Rdyn < 0.4 Ω), critical for limiting let-through energy during fast-rising ESD events (e.g., IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5). Thermal resistance is specified at RθJA = 75 °C/W (on recommended pad layout) and RθJL = 15 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system supply or signal swing. |
| VBR (min/max) | 16.7 V / 18.5 V at IT = 1 mA - Breakdown voltage range where avalanche conduction initiates; ensures consistent turn-on across production lots. |
| VC @ IPPM | 24.4 V at 61.5 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case surge; determines downstream component voltage stress. |
| PPPM | 1500 W - Peak transient power the device can absorb without failure; enables robust protection against high-energy surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; negligible loading on high-impedance sensor or communication lines. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or industrial environments. |
| MSL Level | Level 1 (per J-STD-020) - No floor life limitation; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-directional configuration with no polarity marking - terminals are symmetric and interchangeable. Case meets UL 94 V-0 flammability rating; leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals serve identical roles; bidirectional conduction allows placement without orientation check on PCB. |
| Cathode Band (absent) | Polarity indicator | Not present on bi-directional variants like SMCJ15C-E3/9AT - eliminates risk of incorrect orientation during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Enhances long-term stability of breakdown voltage and leakage current under thermal cycling and humidity stress. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs like CAN transceivers or ADC front-ends. |
| RoHS-compliant, matte tin plating | Ensures reliable solder wetting and intermetallic formation in lead-free reflow processes without whisker risk (JESD 201 Class 1A). |
| 1500 W peak pulse power | Supports compliance with IEC 61000-4-5 Level 4 (4 kV line-to-ground) when used with appropriate series impedance. |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point to shunt surge energy before reaching MCU analog input or LIN transceiver. Use Value: Withstand 1500 W surges while clamping to ≤24.4 V ensures MCU GPIOs and sensor signal conditioning circuits remain within absolute maximum ratings. |
Use Scenario: Safeguarding 24 V digital input channels on PLC modules subjected to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact inputs, working in conjunction with series resistor and optocoupler isolation barrier. Use Value: 1.0 µA leakage at 15 V VWM prevents false triggering of high-impedance input comparators; AEC-Q101 qualification adds reliability assurance for industrial deployments. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Transient suppression on RS-485 differential pairs in base station remote units connected to outdoor cabling. IC Role / Device Role / Timing Role: Paired bi-directional TVS devices (one per line) referenced to common ground, absorbing common-mode surges induced by nearby lightning strikes. Use Value: Symmetrical 16.7–18.5 V VBR ensures balanced clamping on both A/B lines, preserving signal integrity and differential noise immunity during surge events. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer-based TVS, targeting IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bi-directional clamp placed adjacent to USB connector to limit voltage excursion before reaching PHY IC. Use Value: 24.4 V clamping at 61.5 A provides sufficient headroom above 5.25 V USB VBUS while maintaining signal rise/fall times unaffected by excessive junction capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC15C-TB | Same VWM (15 V) and PPPM (1500 W), but in smaller DO-214AA (SMB) package; lower IPPM (52.5 A) and higher VC (27.7 V). | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 due to higher clamping voltage. | Select SAC15C-TB only when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| 1.5KE15CA | Through-hole TO-218 package; same VWM and VC specs, but higher thermal mass and slower mounting process. | Not suitable for automated SMT lines; requires wave solder or hand assembly; incompatible with high-density layouts. | Choose 1.5KE15CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SAC15C-TB and 1.5KE15CA, the SMCJ15C-E3/9AT offers optimal balance of high surge capability, SMT manufacturability, AEC-Q101 qualification, and bi-directional symmetry - making it preferred for new automotive and industrial designs requiring production scalability and compliance assurance.
Availability
SMCJ15C-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ15C-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, efficiency, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and repeatable clamping performance are mandatory.
FAQ
What does the "C" suffix indicate in SMCJ15C-E3/9AT?
The "C" suffix in SMCJ15C-E3/9AT denotes a bi-directional configuration, meaning the device provides symmetrical transient suppression in both polarities - unlike uni-directional variants (e.g., SMCJ15A) that require correct cathode orientation. This eliminates polarity concerns during PCB layout and assembly, simplifying design for AC-coupled or floating signal lines.
Is SMCJ15C-E3/9AT suitable for automotive applications?
Yes, SMCJ15C-E3/9AT is AEC-Q101 qualified and rated for operating junction temperatures up to +150 °C, making it suitable for under-hood and cabin-mounted automotive systems. Its bi-directional clamping, low leakage, and robust 1500 W surge rating align with requirements for protecting LIN, CAN FD, and sensor signal paths in modern vehicle ECUs.
How does the 10/1000 µs waveform relate to real-world surge threats?
The 10/1000 µs waveform used to specify SMCJ15C-E3/9AT's PPPM and IPPM represents a standardized lightning-induced surge per IEC 61000-4-5. It models the rise time (10 µs) and decay to 50% (1000 µs) of a high-energy transient - enabling direct comparison with system-level immunity test requirements and ensuring the device can handle worst-case line-to-ground surges in industrial and telecom installations.
What is the significance of the "E3/9AT" suffix in the full part number?
The "E3" indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance, while "9AT" specifies packaging in 13-inch plastic tape-and-reel format with 3500 units per reel - optimized for high-volume SMT placement. This ensures compatibility with automated pick-and-place equipment and supports lean manufacturing workflows.
Can SMCJ15C-E3/9AT be used in place of a uni-directional TVS like SMCJ15A?
No - SMCJ15C-E3/9AT is bi-directional and lacks polarity marking, whereas SMCJ15A is uni-directional with a cathode band. Substituting them requires verifying circuit topology: SMCJ15C-E3/9AT is appropriate for AC signals or floating references, but SMCJ15A must be used where DC bias polarity is fixed and forward conduction must be blocked. Using SMCJ15C-E3/9AT in a uni-directional DC path may cause unintended conduction.
SMCJ15C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 55.8A
- 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)
SMCJ15C-E3/9AT FAQ
1.How can I place an order for SMCJ15C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15C-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 SMCJ15C-E3/9AT reliable?
The price and inventory of SMCJ15C-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 SMCJ15C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ15C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15C-E3/9AT?
SMCJ15C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15C-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 SMCJ15C-E3/9AT?
For technical support, including SMCJ15C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ15C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ15C-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 SMCJ15C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ15C-E3/9AT?
All SMCJ15C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15C-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 SMCJ15C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ15C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15C-E3/9AT Tags
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