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Vishay General Semiconductor - Diodes Division SMCJ14CAHM3/I
- Part No.:
- SMCJ14CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CAHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,472
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Product details
Overview
SMCJ14CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust ESD and surge protection of DC power rails and signal lines. It features 14 V standoff voltage (VWM), 23.2 V clamping voltage (VC) at 64.7 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), with AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCJ14CAHM3/I datasheet, SMCJ14CAHM3/I pinout, SMCJ14CAHM3/I application, or SMCJ14CAHM3/I equivalent, this device serves as a halogen-free, RoHS-compliant, bidirectional TVS for high-energy transient suppression in automotive infotainment power supplies, industrial sensor interfaces, and telecom line cards where stable clamping performance and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMCJ14CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±15.6 V (min VBR) and below ±17.2 V (max VBR) in both polarities. Its glass-passivated junction ensures low leakage (<1.0 µA at VWM) and fast response time (<1 ns), enabling protection against ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance and matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected circuitry. |
| VBR (min/max) | 15.6 V / 17.2 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 23.2 V - Clamped voltage during 10/1000 µs 64.7 A surge; determines maximum stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; enables survival of high-energy transients without failure. |
| IPPM | 64.7 A - Maximum non-repetitive surge current (10/1000 µs); sets minimum trace width and PCB copper pad requirements. |
| TJ max | +150 °C - Maximum junction temperature rating; supports under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm thermal pads; compatible with automated placement and reflow. |
Pinout & Package
SMCJ14CAHM3/I uses the standard SMC (DO-214AB) package: a 2-terminal, bidirectional device with no polarity marking. Both terminals are electrically symmetrical; neither is designated anode or cathode. The case is molded epoxy meeting UL 94 V-0 flammability rating, with matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connected across protected line and ground (or between differential lines); carries full surge current during clamping. |
| Terminal 2 | Transient input/output node | Electrically identical to Terminal 1; bidirectional symmetry allows flexible PCB layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors, with extended temperature cycling and humidity testing. |
| Halogen-free (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-020; eliminates brominated flame retardants for safer end-of-life processing. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/85 % RH; supports standard SMT assembly without baking or dry pack requirements. |
| Low incremental surge resistance | Enables tighter VC–VBR margin (ΔV = 7.6 V), reducing voltage overshoot during fast-rising transients. |
| Glass passivated junction | Provides stable leakage performance (<1.0 µA at 14 V) over lifetime and temperature, critical for low-power sensor nodes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed infotainment head unit power inputs from load dump (ISO 16750-2) and jump-start spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VBAT and GND, clamping transients up to ±100 V within nanoseconds. Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤23.2 V, preventing latch-up or gate oxide damage. | Use Scenario: Shielding 4–20 mA current loop transmitters in factory automation PLC modules from induced surges on long field wiring. IC Role / Device Role / Timing Role: Connected across loop terminals (T+–T−), absorbing common-mode and differential transients. Use Value: Maintains loop integrity during 1 kV/500 A surge events (IEC 61000-4-5), avoiding signal dropout or calibration drift. |
| Telecom Line Card Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding Ethernet PHY power pins (3.3 V, 5 V) on telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Placed on VDD-to-GND path adjacent to PHY IC, with minimal trace inductance. Use Value: Clamps 10/1000 µs surges to ≤23.2 V while dissipating 1500 W, preserving PHY functionality after repeated strikes. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 VBUS lines in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional TVS between VBUS and GND, complementing integrated USB transceiver ESD diodes. Use Value: Handles >30 kV contact ESD (IEC 61000-4-2) without degradation, extending product field life in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC14CA | Lower PPPM (600 W), smaller SMA package, higher VC (25.5 V at 23.5 A) | Not suitable for high-energy load dump; limited to low-power signal lines. | Select when board space is constrained and surge energy is <600 W. |
| SMCJ14AHE3/I | Unidirectional version; same VWM/VC/PPPM, but requires correct polarity orientation and lacks negative-voltage clamping. | Only usable on DC-biased lines with known polarity; unsuitable for AC or floating signals. | Choose only if circuit topology guarantees unidirectional transients and polarity alignment is assured. |
Compared with SAC14CA and SMCJ14AHE3/I, the SMCJ14CAHM3/I delivers superior 1500 W surge handling in a robust SMC package with bidirectional symmetry and automotive qualification-making it the preferred choice for high-reliability power rail protection where polarity independence and energy margin are essential.
Availability
SMCJ14CAHM3/I is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor modules, and telecom line cards requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMCJ14CAHM3/I 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 ESD, lightning, and inductive switching surges is mandatory.
FAQ
What is the clamping voltage of the SMCJ14CAHM3/I under a 10/1000 µs surge?
The SMCJ14CAHM3/I clamps to a maximum of 23.2 V when subjected to its rated 64.7 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The clamping performance remains consistent across both polarities due to its bidirectional design, making SMCJ14CAHM3/I suitable for protecting balanced or floating circuits.
Is the SMCJ14CAHM3/I suitable for automotive applications?
Yes, the SMCJ14CAHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in Vishay's ordering information table. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and mechanical shock-to meet automotive reliability standards. The device is explicitly recommended for use in engine control units, body electronics, and infotainment systems, and SMCJ14CAHM3/I supports junction temperatures from –55 °C to +150 °C, covering under-hood and cabin environments.
How does the HM3 suffix differ from the M3 or E3 suffix in the SMCJ14CAHM3/I part number?
The HM3 suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification, whereas M3 indicates halogen-free RoHS compliance without automotive qualification, and E3 specifies standard RoHS compliance only. All three share the same SMC package and electrical specs, but SMCJ14CAHM3/I is uniquely validated for automotive use and meets JESD 201 Class 2 whisker resistance. This distinction makes SMCJ14CAHM3/I appropriate for safety-critical automotive designs where material content and qualification are audited.
What is the maximum reverse leakage current for the SMCJ14CAHM3/I at its standoff voltage?
The maximum reverse leakage current (ID) for the SMCJ14CAHM3/I is 1.0 µA at its 14 V standoff voltage (VWM), measured at TA = 25 °C. This low leakage ensures minimal power loss in always-on circuits such as automotive wake-up receivers or battery-backed sensors. The specification is verified per the electrical characteristics table in Vishay's SMCJ5.0A–SMCJ188CA datasheet, and SMCJ14CAHM3/I maintains this performance across its full operating temperature range due to its glass-passivated junction.
Can the SMCJ14CAHM3/I be used in bidirectional AC signal paths?
Yes, the SMCJ14CAHM3/I is specifically designed for bidirectional operation, with symmetrical breakdown (15.6 V to 17.2 V) and clamping in both polarities. It is commonly deployed across differential data lines (e.g., RS-485, CAN FD), AC power inputs, and floating sensor bridges where voltage transients may occur with either polarity. Unlike unidirectional variants, SMCJ14CAHM3/I requires no polarity marking or orientation during placement, simplifying layout and eliminating risk of reverse installation.
SMCJ14CAHM3/I 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/I FAQ
1.How can I place an order for SMCJ14CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CAHM3/I 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/I reliable?
The price and inventory of SMCJ14CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ14CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CAHM3/I?
SMCJ14CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CAHM3/I 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/I?
For technical support, including SMCJ14CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CAHM3/I requirements.
6.How does Aetrix verify that SMCJ14CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ14CAHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of SMCJ14CAHM3/I?
All SMCJ14CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CAHM3/I, 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/I part is unused and in its original packaging.
Return procedure for SMCJ14CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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