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Vishay General Semiconductor - Diodes Division SMCJ14AHM3/I
- Part No.:
- SMCJ14AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14AHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,702
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Product details
Overview
SMCJ14AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 64.7 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive power supply inputs and industrial sensor interface circuits.
For engineers reviewing the SMCJ14AHM3/I datasheet, SMCJ14AHM3/I pinout, SMCJ14AHM3/I application, or SMCJ14AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), low incremental surge resistance, and verified clamping performance under repetitive transients per IEC 61000-4-5.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds the breakdown threshold (15.6–17.2 V at 1 mA), it avalanches to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable leakage (<1.0 µA at 14 V) and fast response (<1 ns), critical for protecting MOSFET gates and microcontroller I/O pins.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient, with thermal resistance of 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads. Its unidirectional polarity-marked by cathode band-enables precise placement in DC-biased protection paths without reverse conduction concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail (e.g., 12 V automotive). |
| VBR min/max | 15.6 V / 17.2 V - Breakdown occurs within this range at 1 mA test current; defines turn-on consistency across production lot. |
| VC | 23.2 V - Clamped voltage at 64.7 A peak pulse; determines maximum stress imposed on protected circuit during surge. |
| IPPM | 64.7 A - Peak surge current capability with 10/1000 µs waveform; validates immunity to IEC 61000-4-5 Level 4 (4 kV) transients. |
| PPPM | 1500 W - Peak pulse power handling; enables single-device protection for high-energy inductive switch-off events. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
SMCJ14AHM3/I uses the SMC (DO-214AB) package: a rectangular surface-mount case with two coplanar matte tin-plated leads. Polarity is marked by a cathode band on the body end; the banded terminal is the cathode (anode is unmarked). Leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., +12 V rail); conducts avalanche current to ground during overvoltage. |
| Anode (unmarked end) | Reference/return node | Typically tied to system ground or low-impedance return path; completes clamping loop during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and JEDEC JS709B; eliminates brominated flame retardants for safer recycling. |
| Low incremental surge resistance | Enables tighter clamping (23.2 V @ 64.7 A) versus higher-resistance alternatives, reducing voltage overshoot on sensitive loads. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Provides stable leakage current (<1.0 µA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and chassis ground; clamps transients within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and MCUs to ≤23.2 V, preventing latch-up or gate oxide damage. | Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional clamp on 4–20 mA current loop output line, referenced to local ground. Use Value: Maintains signal integrity during ESD events (IEC 61000-4-2 ±8 kV contact) while adding <0.5 pF capacitance. |
| DC-DC Converter Input Stage | Telecom Line Card Surge Suppression |
Use Scenario: Input protection for 24 V input buck converters in railway signaling equipment. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input filter capacitor and controller IC. Use Value: Absorbs 1500 W surges without degradation, preserving converter startup behavior after repeated transients. | Use Scenario: Secondary-side protection on -48 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on feed line to voltage supervisor and monitoring ICs. Use Value: Withstands 64.7 A pulses (10/1000 µs) while maintaining <1.0 µA leakage at -48 V nominal bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs. | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy transients in space-constrained consumer designs. | Select when board area is critical and surge energy is ≤400 W; verify thermal margin on small pads. |
| SMCJ14AHE3/I | Same electrical specs and SMC package, but RoHS-compliant commercial grade (E3) without halogen-free certification. | Lacks halogen-free material declaration; acceptable for non-automotive industrial use where HM3 is not mandated. | Choose for cost-sensitive non-automotive programs where halogen-free compliance is not required. |
Compared with SMCJ14AHM3/I, SMAJ14AHE3/A offers reduced surge capacity in a smaller footprint, while SMCJ14AHE3/I provides identical protection performance without halogen-free assurance-making SMCJ14AHM3/I the preferred choice for AEC-Q101 and green-materials-compliant automotive designs.
Availability
SMCJ14AHM3/I is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, and telecom line card protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ14AHM3/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, and protection devices with emphasis on reliability and automotive-grade validation.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments, targeting ISO 7637-2 and IEC 61000-4-5 compliance in automotive and industrial power systems.
FAQ
What is the clamping voltage of SMCJ14AHM3/I at its rated peak pulse current?
The SMCJ14AHM3/I has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 64.7 A using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuits. The SMCJ14AHM3/I maintains this clamping performance across its qualified operating temperature range.
Is SMCJ14AHM3/I suitable for automotive applications?
Yes, SMCJ14AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets stress test requirements for temperature cycling, humidity, and mechanical shock, and is specified for operation from –55 °C to +150 °C. The SMCJ14AHM3/I is explicitly recommended for engine control, body electronics, and infotainment power rail protection.
How does the HM3 suffix differ from the E3 suffix in SMCJ14A part numbering?
The HM3 suffix denotes halogen-free, RoHS-compliant construction meeting JEDEC JS709B, while E3 indicates RoHS-compliant but not necessarily halogen-free. Both meet JESD 201 Class 2 whisker resistance and MSL Level 1, but only HM3-certified parts like SMCJ14AHM3/I satisfy strict automotive material declarations. The SMCJ14AHM3/I is functionally identical to E3 variants except for material composition.
What is the thermal resistance of SMCJ14AHM3/I, and how does it affect layout design?
The SMCJ14AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes minimum recommended pad layout; reducing pad size increases thermal resistance and reduces safe surge repetition rate. For high-duty-cycle applications, the SMCJ14AHM3/I benefits from additional thermal relief or localized ground plane expansion to maintain TJ ≤ 150 °C.
Can SMCJ14AHM3/I be used in bidirectional configurations?
No, SMCJ14AHM3/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMCJ14CA). Using SMCJ14AHM3/I in AC or floating-bias applications risks forward conduction during negative half-cycles. For bidirectional protection, select SMCJ14CAHM3/I or equivalent-never substitute unidirectional SMCJ14AHM3/I in such roles.
SMCJ14AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ14AHM3/I FAQ
1.How can I place an order for SMCJ14AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14AHM3/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 SMCJ14AHM3/I reliable?
The price and inventory of SMCJ14AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ14AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14AHM3/I?
SMCJ14AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14AHM3/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 SMCJ14AHM3/I?
For technical support, including SMCJ14AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14AHM3/I requirements.
6.How does Aetrix verify that SMCJ14AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ14AHM3/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 SMCJ14AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ14AHM3/I?
All SMCJ14AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14AHM3/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 SMCJ14AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ14AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14AHM3/I Tags
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