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Vishay General Semiconductor - Diodes Division SMCJ15CA-E3/9AT
- Part No.:
- SMCJ15CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CA-E3/9AT.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ15CA-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 15 V standoff voltage (VWM), 24.4 V clamping voltage (VC) at 61.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed across automotive sensor lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the SMCJ15CA-E3/9AT datasheet, SMCJ15CA-E3/9AT pinout, SMCJ15CA-E3/9AT application, or SMCJ15CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3 suffix variants), thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the SMC package supports high surge current handling (200 A IFSM for unidirectional equivalents) and meets MSL Level 1 per J-STD-020.
The device complies with ANSI/IEEE C62.35 for surge protector characterization and delivers consistent clamping performance across -55 °C to +150 °C operating junction temperature range. Its 0.088 %/°C temperature coefficient of VBR ensures predictable voltage drift under thermal stress in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line operating margin. |
| VBR min/max | 16.7 V / 18.5 V at 1.0 mA - Verified breakdown threshold range ensuring reliable turn-on during transients. |
| VC @ IPPM | 24.4 V at 61.5 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables survival of high-energy lightning-induced surges. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for sustained surge duty cycles. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and high-temperature industrial enclosures. |
| ID @ VWM | 1.0 µA - Reverse leakage at standoff voltage; ensures minimal signal loading on high-impedance sensor or data lines. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative-going transients; symmetrical with cathode in bidirectional mode. |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive-going transients; functionally identical to anode in CA-type devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal paths without external polarity management. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 8 mm × 8 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping - critical for safeguarding 3.3 V and 5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking preconditioning. |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring validated reliability per stress test standards. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Standoff-mode TVS placed directly at connector interface to shunt surge energy before reaching ASIC or microcontroller input pins. Use Value: Maintains 15 V VWM margin below typical 12 V automotive supply rails while clamping to 24.4 V - preserving signal integrity and preventing latch-up in downstream ICs. | Use Scenario: Shielding digital and analog inputs/outputs of programmable logic controllers against EFT (IEC 61000-4-4) and surge (IEC 61000-4-5) events in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-wire terminals, coordinated with upstream GDTs or gas arrestors for staged protection. Use Value: 1500 W PPPM rating sustains repeated 2 kV/1 kA surges per IEC 61000-4-5 Ed. 3, reducing need for redundant protection stages. |
| Telecom Line Interface Protection | Consumer USB/DisplayPort ESD Hardening |
Use Scenario: Safeguarding Ethernet PHYs, DSL line drivers, and base station RF front-end bias lines from lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Secondary surge suppressor after primary gas discharge tube, limiting residual clamping voltage to sub-30 V levels. Use Value: 24.4 V VC ensures compliance with GR-1089-CORE surge immunity requirements for NEBS Level 3 equipment. | Use Scenario: Adding robust system-level ESD and surge resilience to USB 2.0/3.0, HDMI, and DisplayPort receptacles in laptops and docking stations. IC Role / Device Role / Timing Role: Board-level TVS placed adjacent to connector to absorb contact discharge (IEC 61000-4-2 ±15 kV) and cable discharge events. Use Value: Low 1.0 µA ID at 15 V VWM prevents signal attenuation on high-speed differential pairs while enabling fast (<1 ps) response to ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC15CA | Same VWM (15 V) and VC (24.4 V), but lower PPPM (600 W); SOD-123FL package (smaller footprint, higher RθJA). | Best suited for space-constrained consumer ports where surge threat level is limited to IEC 61000-4-2 only. | Select SAC15CA only when board area is critical and peak surge energy does not exceed 600 W capability. |
| 1.5KE15CA | Same electrical specs (VWM = 15 V, VC = 24.4 V, PPPM = 1500 W), but axial DO-201AE package - incompatible with SMT assembly. | Used in legacy through-hole designs or repair scenarios where rework of SMT pads is impractical. | Choose 1.5KE15CA only for prototyping, repair, or non-SMT production environments - not for new SMT designs. |
Compared with SAC15CA and 1.5KE15CA, the SMCJ15CA-E3/9AT uniquely balances high-power surge handling (1500 W), SMT manufacturability (SMC package), and thermal performance (RθJA = 75 °C/W), making it optimal for volume automotive and industrial PCBs requiring automated assembly and repeatable surge immunity.
Availability
SMCJ15CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ15CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure tolerance and surge survivability are mission-critical.
FAQ
What is the clamping voltage of SMCJ15CA-E3/9AT at its rated peak pulse current?
The SMCJ15CA-E3/9AT has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 61.5 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and verified at TA = 25 °C with specified mounting conditions - confirming the device limits transient voltage to a safe level for downstream 24 V-rated components. The SMCJ15CA-E3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCJ15CA-E3/9AT suitable for automotive applications?
Yes, the SMCJ15CA-E3/9AT is suitable for automotive applications as part of Vishay's AEC-Q101 qualified SMCJ family. While the E3/9AT suffix denotes commercial-grade RoHS-compliant packaging, the same die is used in HE3-suffixed variants (e.g., SMCJ15CAHE3_A/I) that are fully AEC-Q101 qualified. Engineers may use SMCJ15CA-E3/9AT for prototyping and non-safety-critical systems, then migrate to HE3 versions for production automotive ECUs requiring certified reliability.
What is the standoff voltage (VWM) and why is it important for SMCJ15CA-E3/9AT?
The standoff voltage (VWM) of SMCJ15CA-E3/9AT is 15 V - the maximum DC or continuous peak reverse voltage the device can withstand without entering avalanche conduction. This parameter ensures the SMCJ15CA-E3/9AT remains non-conductive during normal operation, minimizing leakage (1.0 µA) and avoiding interference with signal integrity. Selecting a VWM ≥15 V guarantees compatibility with 12 V automotive and 15 V industrial supply rails while retaining sufficient margin before clamping activation.
How does the SMC (DO-214AB) package of SMCJ15CA-E3/9AT impact thermal performance?
The SMC (DO-214AB) package of SMCJ15CA-E3/9AT provides a thermal resistance of RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15 °C/W (junction-to-lead) under standard mounting conditions. Its large copper pad footprint (8.0 mm × 8.0 mm per terminal) enables efficient heat dissipation during repetitive surge events. This makes the SMCJ15CA-E3/9AT more thermally robust than smaller packages like SOD-123FL, supporting sustained operation in high-temperature environments such as engine control units or industrial motor drives.
Can SMCJ15CA-E3/9AT be used in bidirectional signal lines like RS-485 or CAN bus?
Yes, SMCJ15CA-E3/9AT is explicitly designed for bidirectional signal line protection, as indicated by the "CA" suffix. Its symmetrical breakdown characteristics (VBR min/max = 16.7 V / 18.5 V in both directions) ensure equal clamping for positive and negative transients - ideal for differential buses like RS-485, CAN, or LIN. Unlike unidirectional TVS diodes, the SMCJ15CA-E3/9AT requires no external polarity consideration and fits seamlessly into balanced line topologies without additional components.
SMCJ15CA-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 61.5A
- 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)
SMCJ15CA-E3/9AT FAQ
1.How can I place an order for SMCJ15CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CA-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 SMCJ15CA-E3/9AT reliable?
The price and inventory of SMCJ15CA-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 SMCJ15CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ15CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CA-E3/9AT?
SMCJ15CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CA-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 SMCJ15CA-E3/9AT?
For technical support, including SMCJ15CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ15CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ15CA-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 SMCJ15CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ15CA-E3/9AT?
All SMCJ15CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CA-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 SMCJ15CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ15CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15CA-E3/9AT Tags
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