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Vishay General Semiconductor - Diodes Division SMCJ18CAHE3_A/H
- Part No.:
- SMCJ18CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ18CAHE3_A/H.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,654
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Product details
Overview
SMCJ18CAHE3_A/H 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 18 V standoff voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps transients to ≤29.2 V at 51.4 A IPPM - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ18CAHE3_A/H datasheet, SMCJ18CAHE3_A/H pinout, SMCJ18CAHE3_A/H application, or SMCJ18CAHE3_A/H equivalent, key selection criteria include bidirectional surge capability, AEC-Q101 qualification, 1500 W 10/1000 µs rating, low clamping ratio (VC/VBR ≈ 1.46), and RoHS-compliant HE3 automotive-grade construction.
Technical Context
This TVS diode operates as a voltage-clamping device across two terminals with symmetrical reverse/forward conduction behavior. Its silicon avalanche junction delivers sub-nanosecond response to ESD and lightning-induced transients, while maintaining <1.0 µA leakage at 18 V and supporting continuous operation up to +150 °C junction temperature.
The device uses glass-passivated chip construction and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its bidirectional architecture eliminates polarity concerns in AC-coupled or floating signal paths, and its 75 °C/W junction-to-ambient thermal resistance enables surface-mount placement without heatsinking under typical PCB copper pad layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuitry |
| VBR min/max | 20.0 V / 22.1 V at 1.0 mA - guaranteed avalanche onset window; ensures predictable turn-on during surges |
| VC @ IPPM | 29.2 V at 51.4 A - clamped voltage under 10/1000 µs surge; determines worst-case stress on downstream components |
| PPPM | 1500 W - peak transient power handling capacity; supports IEC 61000-4-5 Level 4 surge immunity |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated standoff; minimizes standby power loss and signal distortion |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pads; compatible with automated pick-and-place |
Pinout & Package
SMCJ18CAHE3_A/H is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case, and both terminals are functionally identical for transient suppression in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Common connection point for symmetrical clamping; no fixed polarity - connects to either side of protected line |
| Terminal 2 | Anode/Cathode (bidirectional) | Second connection point completing the bidirectional path; interchangeable with Terminal 1 in layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 1500 W 10/1000 µs rating | Withstands severe lightning-induced surges per IEC 61000-4-5 without degradation |
| Bidirectional symmetry | Eliminates need for orientation verification during assembly and supports AC or floating signal protection |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping, reducing risk of damage to downstream ICs and MOSFETs |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume manufacturing flow |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in vehicle body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at power entry point to limit transient excursions below IC absolute maximum ratings. Use Value: Clamps 1500 W surges to ≤29.2 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies downstream. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD events in factory-floor pressure and temperature transmitters. IC Role / Device Role / Timing Role: Bidirectional shunt protector across signal and return paths to divert fast transients before reaching precision DAC or op-amp circuitry. Use Value: Sub-nanosecond response and <1.0 µA leakage preserve signal integrity and measurement accuracy in millivolt-level analog systems. |
| Telecom Interface Surge Suppression | Consumer Device USB Port Protection |
Use Scenario: Shielding RS-485 transceiver I/O pins in networked building automation controllers from induced surges on long cable runs. IC Role / Device Role / Timing Role: Two-terminal bidirectional clamp bridging differential pair to ground, suppressing common-mode transients without affecting DC bias. Use Value: Symmetrical VBR (20.0–22.1 V) and low VC ensure compliance with ITU-T K.20 and IEC 61000-4-5 requirements for telecom infrastructure. | Use Scenario: Adding secondary overvoltage defense on VBUS line of USB-C ports in portable medical monitors and handheld test equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of USB power delivery controller to absorb hot-plug spikes and ESD events. Use Value: 18 V VWM allows normal 5 V operation while clamping 15 kV HBM ESD to safe levels, meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CAHE3_A/H | Lower PPPM (400 W), same VWM/VBR, SMA package (smaller footprint, higher RθJA) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges in space-constrained consumer designs | Select when board area is critical and surge threat level is ≤400 W. |
| SMCJ18AHE3_A/H | Unidirectional version; cathode band marking; identical VWM/VBR/PPPM but asymmetric conduction | Requires correct polarity orientation; unsuitable for AC or floating signals where bidirectional clamping is mandatory | Select only for DC rail protection with known polarity and no AC coupling. |
Compared with SMAJ18CAHE3_A/H and SMCJ18AHE3_A/H, SMCJ18CAHE3_A/H uniquely combines 1500 W surge capacity, bidirectional symmetry, and AEC-Q101 qualification - making it the only choice for high-reliability automotive and industrial applications demanding full-spectrum transient immunity without polarity constraints.
Availability
SMCJ18CAHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom infrastructure equipment, and consumer USB power protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ18CAHE3_A/H 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 is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against lightning, ESD, and load dump is mission-critical.
FAQ
What is the clamping voltage of SMCJ18CAHE3_A/H at its rated peak pulse current?
The SMCJ18CAHE3_A/H clamps to a maximum of 29.2 V at its specified peak pulse current of 51.4 A under a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects worst-case voltage seen by protected circuitry during surge events. The clamping performance is guaranteed across the full operating temperature range and forms the basis for downstream component voltage margining in designs using SMCJ18CAHE3_A/H.
Is SMCJ18CAHE3_A/H suitable for automotive applications?
Yes, SMCJ18CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets stringent requirements for temperature cycling, humidity resistance, and surge endurance required in engine control units, body electronics, and ADAS subsystems. Its 1500 W rating and +150 °C junction rating make SMCJ18CAHE3_A/H appropriate for under-hood and chassis-mounted applications where thermal and electrical stress are elevated.
How does the bidirectional design of SMCJ18CAHE3_A/H affect PCB layout?
The bidirectional design of SMCJ18CAHE3_A/H eliminates polarity constraints - no cathode band or orientation marking is present, and either terminal may connect to either side of the protected line. This simplifies layout, reduces assembly errors, and enables use in AC-coupled, floating, or differential signal paths. Layout requires only two symmetric thermal pads per the DO-214AB footprint, with no routing restrictions related to directionality - a key advantage over unidirectional alternatives like SMCJ18AHE3_A/H.
What is the maximum reverse leakage current for SMCJ18CAHE3_A/H at its standoff voltage?
The maximum reverse leakage current for SMCJ18CAHE3_A/H is 1.0 µA at its 18 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power loss in battery-powered systems. Leakage remains within specification across the full -55 °C to +150 °C operating junction temperature range, ensuring consistent performance in extreme environments where SMCJ18CAHE3_A/H is deployed.
Does SMCJ18CAHE3_A/H require special handling during reflow soldering?
No, SMCJ18CAHE3_A/H is rated MSL Level 1 per J-STD-020 and supports standard lead-free reflow profiles with a maximum peak temperature of 260 °C. It does not require pre-baking or dry pack handling, enabling direct integration into high-volume SMT assembly lines. The device's matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring reliable solder wetting and whisker resistance - critical for long-term reliability in automotive and industrial applications using SMCJ18CAHE3_A/H.
SMCJ18CAHE3_A/H 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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 51.4A
- 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)
SMCJ18CAHE3_A/H FAQ
1.How can I place an order for SMCJ18CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ18CAHE3_A/H 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 SMCJ18CAHE3_A/H reliable?
The price and inventory of SMCJ18CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ18CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ18CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ18CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ18CAHE3_A/H?
SMCJ18CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ18CAHE3_A/H 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 SMCJ18CAHE3_A/H?
For technical support, including SMCJ18CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ18CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ18CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ18CAHE3_A/H 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 SMCJ18CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ18CAHE3_A/H?
All SMCJ18CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ18CAHE3_A/H, 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 SMCJ18CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ18CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ18CAHE3_A/H Tags
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