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Vishay General Semiconductor - Diodes Division SMCJ14CAHM3/H
- Part No.:
- SMCJ14CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CAHM3/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,715
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Product details
Overview
SMCJ14CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust ESD and surge protection on signal/power lines. It features 14 V standoff voltage (VWM), 1500 W peak pulse power (10/1000 µs), clamping voltage of 23.2 V at 64.7 A IPPM, and operates from –55 °C to +150 °C - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ14CAHM3/H datasheet, SMCJ14CAHM3/H pinout, SMCJ14CAHM3/H application, or SMCJ14CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 8.0 mm × 8.0 mm copper pad layouts per JEDEC standards.
Technical Context
This device implements a silicon avalanche diode structure optimized for fast response (<1 ps) to transient overvoltages, with low incremental surge resistance enabling stable clamping under repetitive surges. Its bidirectional symmetry ensures identical VBR min/max (15.6 V / 17.2 V) and VC (23.2 V) in both polarities, meeting IEC 61000-4-2 (±30 kV contact) and IEC 61000-4-5 (4 kV 2 Ω/42 Ω ring wave) requirements.
The SMCJ14CAHM3/H uses glass-passivated junction technology and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Thermal resistance is RθJA = 75 °C/W (on recommended pads) and RθJL = 15 °C/W, supporting reliable operation up to TJ = 150 °C without derating below TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected line. |
| VBR (min/max) | 15.6 V / 17.2 V - breakdown voltage range at 1 mA test current; guarantees consistent turn-on across production lots. |
| VC @ IPPM | 23.2 V at 64.7 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - peak pulse power handling capacity; enables protection against high-energy transients like load dump or inductive kick. |
| ID @ VWM | 1.0 µA - reverse leakage at standoff voltage; ensures minimal power loss and signal integrity in low-current sensor paths. |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood automotive use and industrial environments with elevated ambient. |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMCJ14CAHM3/H is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case; terminals are symmetrical and interchangeable. The device mounts with cathode/anode leads soldered to PCB pads per JEDEC-standard 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper areas.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Interchangeable connection point; no polarity dependency - either terminal may connect to protected line or ground reference. |
| Terminal 2 | Anode/Cathode (bidirectional) | Interchangeable connection point; forms symmetric clamping path across differential or single-ended signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor modules per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC JS709E; eliminates brominated flame retardants and antimony trioxide in molding compound. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/60% RH; supports reflow soldering up to 260 °C peak without preconditioning. |
| Low clamping ratio (VC/VBR) | 1.48 - calculated as 23.2 V / 15.6 V; indicates efficient energy diversion with minimal overvoltage overshoot. |
| Glass passivated junction | Provides stable breakdown characteristics over temperature and lifetime; reduces parameter drift vs. epoxy-passivated alternatives. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump spikes and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground, responding within <1 ns to transients exceeding VWM. Use Value: Limits voltage seen by downstream ASIC to ≤23.2 V during 10/1000 µs surges up to 64.7 A, preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring exposed to relay coil flyback and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted across input terminals, conducting only during overvoltage events while remaining high-impedance during normal operation. Use Value: Maintains system uptime by absorbing 1500 W surge energy without degradation, verified over >1000 surges per IEC 61000-4-5. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
|
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from induced surges on long-distance twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level surge suppressor placed before series impedance, providing first-stage clamping ahead of secondary TVS or filter networks. Use Value: Achieves 4 kV IEC 61000-4-5 immunity with <100 ps response, reducing need for additional protection stages and board space. |
Use Scenario: Adding robust ESD immunity to USB 2.0 data lines (D+/D−) in smart home hubs where human-contact events exceed ±15 kV air discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 200 pF at 0 V) placed directly at connector, shunting ESD current away from PHY IC. Use Value: Passes IEC 61000-4-2 Level 4 (±30 kV contact) without signal distortion or bit errors, validated per USB-IF compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VC specs. | Suitable for space-constrained consumer electronics but not automotive-grade surge duty cycles. | Select when board area is critical and surge energy remains ≤400 W; verify thermal margin with reduced copper pad area. |
| SMCJ14AHE3/H | Unidirectional version with cathode band marking; identical VWM, VC, and PPPM; RoHS-compliant but not halogen-free. | Required where DC-biased lines (e.g., power rails) need asymmetric clamping with lower leakage in forward direction. | Choose for unidirectional protection with legacy compliance; avoid in new automotive designs requiring halogen-free mandate. |
Compared with SMCJ14CAHM3/H, SMAJ14CA offers smaller footprint but sacrifices surge endurance and thermal performance, while SMCJ14AHE3/H provides unidirectional behavior and non-halogen-free construction - making SMCJ14CAHM3/H the optimal choice for AEC-Q101-compliant, bidirectional, high-energy industrial and automotive protection.
Availability
SMCJ14CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line interfaces, and consumer USB port ESD protection requiring stable component supply and full traceability.
Supply support for SMCJ14CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure tolerance and long-term stability are mission-critical.
FAQ
What is the clamping voltage of SMCJ14CAHM3/H at its rated peak pulse current?
The SMCJ14CAHM3/H clamps to 23.2 V at its specified peak pulse current (IPPM) of 64.7 A under a 10/1000 µs waveform. This value is measured per JEDEC standards with the device mounted on 8.0 mm × 8.0 mm copper pads and represents the maximum voltage imposed on protected circuitry during worst-case surge events. The SMCJ14CAHM3/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMCJ14CAHM3/H suitable for automotive applications?
Yes, SMCJ14CAHM3/H is AEC-Q101 qualified and specifically designated for automotive use with the "HM3" suffix indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It meets stringent stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - making it appropriate for engine control units, body electronics, and ADAS sensor modules. The SMCJ14CAHM3/H also complies with MSL Level 1 for lead-free reflow assembly.
How does the bidirectional design of SMCJ14CAHM3/H affect its circuit implementation?
The bidirectional design of SMCJ14CAHM3/H means it functions identically in both polarities - no cathode marking is present, and either terminal can connect to signal or ground. This simplifies layout for AC-coupled or differential lines (e.g., RS-485, CAN FD) and eliminates orientation errors during placement. Unlike unidirectional variants such as SMCJ14AHE3/H, the SMCJ14CAHM3/H provides symmetrical clamping above ±14 V, ensuring protection regardless of transient polarity.
What is the thermal resistance of SMCJ14CAHM3/H, and how does it impact PCB layout?
The SMCJ14CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes standard FR-4 board material and no internal plane layers. To maintain TJ ≤ 150 °C under 6.5 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive trace length or isolation. The SMCJ14CAHM3/H also exhibits RθJL = 15 °C/W, confirming efficient heat transfer to solder joints.
Does SMCJ14CAHM3/H meet international surge immunity standards?
Yes, the SMCJ14CAHM3/H is validated to meet IEC 61000-4-2 (ESD ±30 kV contact), IEC 61000-4-4 (EFT 4 kV), and IEC 61000-4-5 (surge 4 kV line-earth, 2 kV line-line) when applied with proper PCB layout and grounding. Its 1500 W peak pulse power rating and low clamping ratio (VC/VBR = 1.48) enable compliance in Class 3 and Class 4 industrial and automotive immunity requirements. System-level validation of SMCJ14CAHM3/H performance requires adherence to the pad layout and decoupling guidelines specified in Vishay document 88394.
SMCJ14CAHM3/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:
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ14CAHM3/H FAQ
1.How can I place an order for SMCJ14CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CAHM3/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 SMCJ14CAHM3/H reliable?
The price and inventory of SMCJ14CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ14CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CAHM3/H?
SMCJ14CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CAHM3/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 SMCJ14CAHM3/H?
For technical support, including SMCJ14CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CAHM3/H requirements.
6.How does Aetrix verify that SMCJ14CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ14CAHM3/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 SMCJ14CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ14CAHM3/H?
All SMCJ14CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CAHM3/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 SMCJ14CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ14CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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