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Vishay General Semiconductor - Diodes Division SMCJ11CAHE3/9AT
- Part No.:
- SMCJ11CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11CAHE3/9AT.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,806
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Product details
Overview
SMCJ11CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 11 V stand-off voltage (VWM), 18.2 V maximum clamping voltage (VC) at 82.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCJ11CAHE3/9AT datasheet, SMCJ11CAHE3/9AT pinout, SMCJ11CAHE3/9AT application, or SMCJ11CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VWM = 1.65), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
The SMCJ11CAHE3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage (VBR) ranges from 12.2 V to 13.5 V at 1 mA test current, with temperature coefficient of 0.080 %/°C - enabling stable transient suppression across -55 °C to +150 °C operating junction range.
It meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and exhibits low incremental surge resistance for fast response to ESD and lightning-induced surges - critical for protecting sensitive analog inputs and CAN/LIN bus nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 12.2 V / 13.5 V at 1 mA - ensures reliable avalanche conduction onset within tight tolerance for predictable protection threshold. |
| VC @ IPPM | 18.2 V at 82.4 A - clamping voltage under 10/1000 μs surge; limits downstream device stress to safe levels during transients. |
| PPPM | 1500 W - peak pulse power handling capacity; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
SMCJ11CAHE3/9AT is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case, as both terminals are functionally symmetric. The device mounts directly across protected lines (e.g., between signal and ground or supply rails).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity - enables line-to-line or line-to-ground protection without orientation constraints. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; symmetric construction allows placement across differential pairs or unidirectional rails without layout revision. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled signals, differential buses (e.g., RS-485), or dual-rail supplies without external polarity management. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces requiring long-term reliability under thermal and mechanical stress. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 82.4 A - exceeds IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) requirements for industrial and vehicle subsystems. |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage exposure to protected ICs - critical for safeguarding 12 V logic interfaces and low-voltage microcontrollers. |
| MSL Level 1 rating | Supports lead-free reflow soldering at 260 °C peak without moisture-induced damage, eliminating bake-out requirements in high-volume SMT production. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal and chassis ground to clamp ±100 V transients within 1 ns. Use Value: Prevents latch-up or gate oxide damage in op-amps and ADC front-ends by limiting voltage to ≤18.2 V during 82.4 A surge events. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Line-to-ground suppressor on each discrete input, absorbing repetitive 500 W surges per IEC 61000-4-4. Use Value: Extends field lifetime of optocoupler input stages by reducing cumulative stress from >100,000 switching cycles over 10-year service life. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Differential-mode suppressor across A/B bus lines, providing symmetrical clamping without signal distortion. Use Value: Maintains signal integrity below 10 Mbps by limiting inter-line voltage to <20 V during 1 kA surge events per ITU-T K.21. |
Use Scenario: Secondary-side overvoltage protection on 12 V/5 V USB-C PD adapter outputs prone to feedback loop failure. IC Role / Device Role / Timing Role: Clamp device between VOUT and GND, triggered only during abnormal regulation loss (e.g., optocoupler open). Use Value: Limits output excursion to ≤18.2 V during fault conditions, preventing connected devices from exceeding absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC11CA | Same VWM (11 V) and VC (18.2 V), but lower PPPM (600 W); SOD-123FL package (smaller footprint, lower thermal mass). | Limited to low-energy surges (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 or load-dump scenarios. | Select when board space is constrained and surge energy is limited to <100 mJ. |
| SMCJ11CAHM3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free molding compound (HM3 vs HE3). | No functional difference; required only where RoHS-compliant halogen-free materials are mandated by OEM environmental policy. | Choose HM3 version if compliance with IPC-1752A Tier 2 reporting or automotive ELV directive is contractually required. |
Compared with SAC11CA, SMCJ11CAHE3/9AT delivers 2.5× higher surge energy handling and superior thermal dissipation in SMC package; versus SMCJ11CAHM3/9AT, it offers identical protection performance with standard RoHS-compliant (non-halogen-free) construction - simplifying procurement where halogen-free is not mandated.
Availability
SMCJ11CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and consumer power adapter designs requiring stable component supply with full traceability and lifecycle support.
Supply support for SMCJ11CAHE3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where sustained surge immunity and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMCJ11CAHE3/9AT at its rated peak pulse current?
The SMCJ11CAHE3/9AT has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 82.4 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry remains below critical overvoltage thresholds during surge events. The SMCJ11CAHE3/9AT maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMCJ11CAHE3/9AT suitable for automotive applications?
Yes, SMCJ11CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and body electronics applications. Its construction includes glass-passivated junction, MSL Level 1 reflow compatibility, and validated performance across thermal cycling, high-temperature reverse bias, and ESD stress tests. The SMCJ11CAHE3/9AT is commonly deployed in engine control modules, battery management systems, and ADAS sensor interfaces where reliability under vibration and wide temperature swings is essential.
How does the bidirectional design of SMCJ11CAHE3/9AT affect its circuit placement?
The bidirectional design of SMCJ11CAHE3/9AT eliminates polarity sensitivity - it can be placed across any two nodes (e.g., signal-to-ground or line-to-line) without regard to orientation. This simplifies PCB layout, reduces BOM complexity, and enables protection of AC-coupled or differential signals such as RS-485, CAN, or audio lines. Unlike unidirectional TVS diodes, the SMCJ11CAHE3/9AT requires no cathode band alignment during assembly, supporting error-free automated placement.
What is the thermal resistance of SMCJ11CAHE3/9AT, and how does it impact power dissipation?
The SMCJ11CAHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended copper pads (0.31" × 0.31"), and junction-to-lead resistance (RθJL) of 15 °C/W. These values define its steady-state power handling: at TA = 50 °C, its continuous power dissipation (PD) is rated at 6.5 W. For transient suppression, the low RθJL ensures rapid heat transfer during short-duration surges, preserving clamping stability and preventing thermal runaway during repeated 10/1000 μs events.
Does SMCJ11CAHE3/9AT require derating at elevated ambient temperatures?
Yes, SMCJ11CAHE3/9AT must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Document Number: 88394). Its peak pulse power (PPPM) decreases linearly to 50% at TJ = 150 °C, and its DC power dissipation (PD) drops from 6.5 W at 50 °C to zero at 150 °C. Designers must apply the published derating curve when operating in high-ambient environments (e.g., near power converters or in sealed enclosures), ensuring junction temperature remains within -55 °C to +150 °C limits. The SMCJ11CAHE3/9AT's specified TJ max enables direct thermal modeling using its RθJA and RθJL values.
SMCJ11CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ11CAHE3/9AT FAQ
1.How can I place an order for SMCJ11CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11CAHE3/9AT 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 SMCJ11CAHE3/9AT reliable?
The price and inventory of SMCJ11CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ11CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11CAHE3/9AT?
SMCJ11CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11CAHE3/9AT 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 SMCJ11CAHE3/9AT?
For technical support, including SMCJ11CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ11CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ11CAHE3/9AT 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 SMCJ11CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ11CAHE3/9AT?
All SMCJ11CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11CAHE3/9AT, 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 SMCJ11CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ11CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11CAHE3/9AT Tags
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