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Vishay General Semiconductor - Diodes Division SMCJ14CAHE3/57T
- Part No.:
- SMCJ14CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CAHE3/57T.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,838
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Product details
Overview
SMCJ14CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 23.2 V maximum clamping voltage at 64.7 A peak pulse current and 14 V standoff voltage. It provides robust protection for automotive-grade signal lines and power rails against ESD, lightning, and inductive switching surges.
For engineers reviewing the SMCJ14CAHE3/57T datasheet, SMCJ14CAHE3/57T pinout, SMCJ14CAHE3/57T application, or SMCJ14CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
The SMCJ14CAHE3/57T operates as a silicon avalanche diode with symmetrical breakdown in both directions, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage (<1.0 µA at 14 V) and fast response time (<1.0 ps), critical for protecting high-speed sensor interfaces and CAN/LIN bus lines.
Thermally, it features RθJA = 75 °C/W (on standard 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive under-hood and infotainment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 14 V - Maximum continuous reverse voltage before clamping begins; defines operating margin for 12 V automotive systems. |
| Breakdown Voltage (VBR) | 15.6 V min / 17.2 V max at 1.0 mA - Confirmed symmetric avalanche threshold for bidirectional conduction. |
| Clamping Voltage (VC) | 23.2 V at 64.7 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables safe margin for 24 V logic inputs. |
| Peak Pulse Power (PPPM) | 1500 W - Sustains high-energy transients such as ISO 7637-2 Pulse 5a without degradation. |
| Leakage Current (ID) | <1.0 µA at 14 V - Negligible standby power loss and no signal integrity impact on high-impedance sensor nodes. |
| Operating Temperature | -55 °C to +150 °C - Validated for engine control units, ADAS modules, and industrial motor drives. |
| AEC-Q101 Qualified | Yes - Certified for automotive electronics per stress test requirements including HTOL, TC, and HAST. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix). Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative surges; forms symmetrical path with cathode for full-wave clamping. |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive surges; paired with anode to enable bidirectional protection without external polarity routing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics under temperature cycling, humidity, and lifetime stress conditions. |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events in 12 V/24 V vehicle architectures. |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage stress on downstream ICs-critical for 3.3 V/5 V microcontrollers interfacing with protected buses. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking; compatible with standard lead-free solder profiles (260 °C peak). |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and MCU ADC input to limit transient excursions beyond absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs during ISO 16750-2 transient tests while maintaining <1 µA leakage at 14 V system bias. |
Use Scenario: Shielding high-speed CAN FD physical layer transceivers (e.g., TJA1044) from ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance (typ. 190 pF at 0 V) bidirectional suppressor across CAN_H/CAN_L differential pair, preserving signal integrity up to 5 Mbps. Use Value: Clamps common-mode surges to ≤23.2 V without distorting edge timing-verified per ISO 11898-2 EMC immunity requirements. |
| Industrial PLC I/O Protection | Telecom Power Rail Clamp |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers subjected to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary surge limiter on field-side input terminals, coordinated with upstream PTC and downstream optocoupler isolation. Use Value: Absorbs 1500 W pulses without failure, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance testing. |
Use Scenario: Protecting PoE-powered Ethernet switches' 48 V DC input rails against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary MOV-based protection, providing precise voltage limiting at 48 V nominal. Use Value: Limits rail overshoot to 23.2 V × (48/14) ≈ 79.7 V (scaled), preventing overvoltage shutdown of DC-DC controllers like LM5017. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CAHE3/A | Lower PPPM (400 W), same VWM/VC, SMA package (smaller footprint, higher RθJA) | Suitable only for lower-energy transients (IEC 61000-4-2 ESD, not ISO 7637-2) | Select when board space is constrained and surge energy does not exceed 400 W. |
| SMCJ14AHE3/57T | Unidirectional version; identical VWM, VBR, VC, and PPPM but requires correct polarity placement. | Applicable where circuit topology enforces known polarity (e.g., single-rail power input with ground-referenced surge path). | Choose only if layout allows strict cathode/anode orientation and no AC or differential signals are present. |
Compared with SMAJ14CAHE3/A and SMCJ14AHE3/57T, the SMCJ14CAHE3/57T uniquely delivers 1500 W bidirectional clamping in AEC-Q101-qualified SMC packaging-making it the sole option for automotive 12 V CAN or LIN bus protection requiring full-spectrum surge immunity without polarity dependency.
Availability
SMCJ14CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power supplies, and high-reliability sensor interface designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ14CAHE3/57T 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 automotive-grade qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where robustness against ISO 7637, IEC 61000-4-5, and AEC-Q101 stress conditions is mandatory.
FAQ
What is the clamping voltage of the SMCJ14CAHE3/57T at its rated peak pulse current?
The SMCJ14CAHE3/57T has a maximum clamping voltage (VC) of 23.2 V at 64.7 A peak pulse current using the standardized 10/1000 µs waveform. This value is measured under defined test conditions (mounted on 8.0 mm × 8.0 mm copper pads) and ensures predictable overvoltage limiting for downstream ICs. The SMCJ14CAHE3/57T maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMCJ14CAHE3/57T suitable for automotive applications?
Yes, the SMCJ14CAHE3/57T is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction-glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature-meets stringent automotive reliability requirements. The SMCJ14CAHE3/57T is referenced in Vishay's automotive ordering codes (HE3 suffix) and supports ISO 7637-2 and ISO 16750-2 compliance testing.
How does the bidirectional design of the SMCJ14CAHE3/57T affect circuit layout?
The SMCJ14CAHE3/57T has no polarity marking and conducts identically in both directions, eliminating the need for orientation-aware placement on PCBs. This simplifies layout for differential or AC-coupled lines (e.g., CAN, RS-485) and avoids errors from reversed mounting. Unlike unidirectional variants such as SMCJ14AHE3/57T, the SMCJ14CAHE3/57T requires no cathode alignment-reducing assembly risk and enabling direct replacement in existing bidirectional protection schemes.
What is the thermal resistance profile of the SMCJ14CAHE3/57T?
The SMCJ14CAHE3/57T exhibits RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient, measured on 8.0 mm × 8.0 mm copper pads). These values enable efficient heat dissipation during repetitive surge events and support sustained operation at TJ = +150 °C. The low RθJL confirms effective thermal coupling to PCB copper, making the SMCJ14CAHE3/57T suitable for high-power-density automotive modules where heatsinking is limited.
Does the SMCJ14CAHE3/57T meet RoHS and halogen-free requirements?
Yes, the SMCJ14CAHE3/57T carries the HE3 suffix, indicating RoHS-compliance and AEC-Q101 qualification. Per Vishay documentation, HE3 devices are halogen-free and conform to JEDEC JS709B and IPC-1752A material declarations. The molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin-plated per J-STD-002, ensuring compatibility with lead-free reflow processes and environmental compliance mandates for automotive and industrial markets. The SMCJ14CAHE3/57T fully satisfies these requirements without derating or special handling.
SMCJ14CAHE3/57T 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 64.7A
- 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)
SMCJ14CAHE3/57T FAQ
1.How can I place an order for SMCJ14CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CAHE3/57T 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 SMCJ14CAHE3/57T reliable?
The price and inventory of SMCJ14CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ14CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CAHE3/57T?
SMCJ14CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CAHE3/57T 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 SMCJ14CAHE3/57T?
For technical support, including SMCJ14CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ14CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ14CAHE3/57T 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 SMCJ14CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ14CAHE3/57T?
All SMCJ14CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CAHE3/57T, 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 SMCJ14CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ14CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14CAHE3/57T Tags
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