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Vishay General Semiconductor - Diodes Division SMCJ14AHM3/H
- Part No.:
- SMCJ14AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14AHM3/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,265
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Product details
Overview
SMCJ14AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V clamping voltage (VC) at 64.7 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor controllers.
For engineers reviewing the SMCJ14AHM3/H datasheet, SMCJ14AHM3/H pinout, SMCJ14AHM3/H application, or SMCJ14AHM3/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ14AHM3/H operates as a silicon avalanche diode that enters controlled breakdown above its VBR to shunt transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping performance under repetitive surge conditions.
Designed for unidirectional protection, it exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD, inductive switching spikes, and lightning-induced transients per IEC 61000-4-2/4-4/4-5. The device is rated for MSL level 1 and withstands 260 °C lead-free reflow per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - guaranteed avalanche initiation range defining turn-on threshold |
| VC @ IPPM | 23.2 V at 64.7 A - clamped voltage during 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient power handling capacity under standardized surge waveform |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - extended thermal operating range supporting under-hood automotive and high-temperature industrial use |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ14AHM3/H uses the SMC (DO-214AB) package: a two-terminal, surface-mount plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for unidirectional TVS operation | Connected to protected line (e.g., VBUS or signal); clamps to cathode when voltage exceeds VBR |
| Anode (non-banded end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete surge current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock per AEC standard |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial supply chains without brominated flame retardants |
| Low-profile SMC package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment for high-volume manufacturing |
| 1500 W peak pulse power | Provides robust protection against severe transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V systems |
| Glass-passivated junction | Ensures long-term parameter stability and reduced parameter drift across temperature and lifetime stress conditions |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping transients before they reach LDO input. Use Value: Limits voltage seen by downstream regulators to ≤23.2 V during 1500 W surges, preventing latch-up or permanent damage. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure or temperature sensors) connected to ADC inputs in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point on signal line, referenced to local ground plane. Use Value: Clamps ESD events (±8 kV contact) and inductive kickback to <23.2 V within nanoseconds, preserving signal fidelity and ADC accuracy. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line Protection |
Use Scenario: Securing -48 V telecom rectifier outputs feeding backplane distribution networks. IC Role / Device Role / Timing Role: Unidirectional TVS installed on each output rail, oriented to clamp positive-going transients only. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W while maintaining <1.0 μA leakage at -48 V standoff, minimizing standby loss. | Use Scenario: Adding secondary overvoltage protection on VBUS lines in USB-C PD sink designs where primary protection resides upstream. IC Role / Device Role / Timing Role: Secondary clamping device placed after EMI filter but before buck converter input capacitor. Use Value: Provides fail-safe clamping at 23.2 V if upstream protection fails, compatible with 20 V PD 3.0 specifications and automated SMT assembly. |
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), SMA package (smaller footprint, lower thermal mass), same VWM/VBR range | Not suitable for 1500 W load dump; limited to lower-energy transients like ESD or data-line surges | Select when space-constrained layout and moderate surge immunity suffice |
| SMCJ14AHE3/H | Same electrical specs and SMC package, but commercial-grade (HE3) without AEC-Q101 qualification or halogen-free assurance | Lacks automotive qualification and halogen-free compliance required for Tier 1 OEM programs | Select for cost-sensitive industrial or consumer applications where AEC-Q101 is not mandated |
Compared with SMAJ14AHE3/A and SMCJ14AHE3/H, the SMCJ14AHM3/H uniquely combines 1500 W surge capability, AEC-Q101 qualification, and halogen-free construction - making it the only option among the three validated for under-hood automotive deployment with full regulatory traceability.
Availability
SMCJ14AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom power distribution systems, and consumer USB-C power delivery modules requiring stable component supply across multi-year production cycles.
Supply support for SMCJ14AHM3/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, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is non-negotiable.
FAQ
What is the clamping voltage of the SMCJ14AHM3/H under a 10/1000 µs surge?
The SMCJ14AHM3/H has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 64.7 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the voltage imposed on protected circuitry will not exceed 23.2 V during standardized surge events - critical for safeguarding 24 V-tolerant ICs in automotive and industrial systems.
Is the SMCJ14AHM3/H qualified for automotive applications?
Yes, the SMCJ14AHM3/H carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, highly accelerated stress testing (HAST), and mechanical shock - confirming suitability for under-hood and chassis-mounted automotive electronics per Tier 1 OEM requirements.
What does the "HM3" suffix mean in SMCJ14AHM3/H?
The "HM3" suffix in SMCJ14AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., HE3) and confirms compliance with automotive environmental and reliability standards - including JESD201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity rating.
Can SMCJ14AHM3/H be used in bidirectional protection circuits?
No, SMCJ14AHM3/H is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and presence of a cathode band. For bidirectional protection, Vishay specifies the SMCJ14CA family - which lacks polarity marking and clamps symmetrically in both directions. Using SMCJ14AHM3/H in bidirectional configurations risks improper clamping and potential device failure.
What is the thermal resistance of SMCJ14AHM3/H from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMCJ14AHM3/H is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes still air convection and informs derating calculations - for example, at 75 °C ambient, maximum continuous power dissipation drops to ~3.25 W to maintain TJ ≤ 150 °C.
SMCJ14AHM3/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:
- 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/H FAQ
1.How can I place an order for SMCJ14AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14AHM3/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 SMCJ14AHM3/H reliable?
The price and inventory of SMCJ14AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ14AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14AHM3/H?
SMCJ14AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14AHM3/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 SMCJ14AHM3/H?
For technical support, including SMCJ14AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14AHM3/H requirements.
6.How does Aetrix verify that SMCJ14AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ14AHM3/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 SMCJ14AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ14AHM3/H?
All SMCJ14AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14AHM3/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 SMCJ14AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ14AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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