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Vishay General Semiconductor - Diodes Division SMA5J14AHE3/5A
- Part No.:
- SMA5J14AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14AHE3/5A.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,868
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Product details
Overview
SMA5J14AHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR), 23.2 V clamping voltage at 21.6 A peak pulse current, 500 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J14AHE3/5A datasheet, SMA5J14AHE3/5A pinout, SMA5J14AHE3/5A application, or SMA5J14AHE3/5A equivalent, this page delivers verified electrical parameters, thermal derating behavior, junction-to-ambient thermal resistance (80 °C/W), polarity marking convention, and RoHS-compliant, halogen-free AEC-Q101 qualified supply chain details.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding to transients with sub-nanosecond turn-on time and low incremental surge resistance. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and robust ESD immunity up to ±30 kV (HBM).
Designed for 10/1000 μs waveform compliance per IEC 61000-4-5, it sustains non-repetitive surges up to 21.6 A while maintaining clamping below 23.2 V - critical for safeguarding 12 V automotive ECUs, CAN transceivers, and industrial sensor interfaces against load dump and inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before conduction begins; sets safe margin above 12 V nominal rail |
| VBR (min/max) | 15.6 V / 17.2 V at 1.0 mA - guaranteed breakdown threshold defining turn-on consistency across temperature and unit variation |
| VC @ IPPM | 23.2 V at 21.6 A - clamping voltage under full 500 W surge; determines protected circuit's maximum stress level |
| PPPM | 500 W - peak pulse power handling for 10/1000 μs waveform; defines single-event energy absorption capability |
| IFSM | 40 A - 8.3 ms half-sine surge current rating; supports high-current inductive switch-off events without failure |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient on standard 5 mm × 5 mm copper pads; informs PCB thermal layout requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to system ground or low-side reference; completes clamping loop during transient |
| Cathode | Reverse-biased terminal / protected line connection | Connected to line being protected (e.g., 12 V rail); conducts when VLINE exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, body electronics, and ADAS modules |
| Glass passivated junction | Ensures stable VBR tolerance and <1.0 μA leakage at 14 V across -55 °C to +150 °C operating range |
| MSL Level 1 (260 °C) | Compatible with standard SMT reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirement |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving protection margin for downstream ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator-induced surges. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground. Use Value: Clamps to ≤23.2 V during 21.6 A surge, preventing damage to 36 V-rated power management ICs and microcontrollers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC inputs against field-wiring induced transients. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used on single-ended DC-coupled signal lines. Use Value: Sub-ns response and 1.0 μA leakage preserve signal integrity while surviving repeated 1 kV/500 Ω surges (IEC 61000-4-5). |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Securing 12–24 V DC input of PoE-powered network switches and base stations against lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end clamp on bulk power entry point before DC-DC conversion. Use Value: 500 W rating and 80 °C/W RθJA enable sustained surge handling without thermal runaway on compact PCB layouts. | Use Scenario: Hardening 5–12 V DC input jacks of smart home hubs and set-top boxes against user-insertion ESD and AC adapter transients. IC Role / Device Role / Timing Role: Low-leakage, low-capacitance TVS placed directly at connector footprint. Use Value: 14 V VWM avoids false triggering during normal operation while clamping 8 kV contact ESD to <30 V peak. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14A-E3/5A | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical SMA package and pinout | Not qualified for automotive under-hood use; suitable for consumer/industrial indoor environments | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SMC5J14AHE3/5A | Same electrical specs but in larger SMC (DO-214AB) package; higher IPPM (31.5 A) and lower RθJA (50 °C/W) | Better thermal performance and surge margin; requires larger PCB area and different pad layout | Select when higher surge endurance or extended thermal headroom is required in space-tolerant designs |
Compared with SMA5J14A-E3/5A, the SMA5J14AHE3/5A adds AEC-Q101 qualification and halogen-free construction without sacrificing electrical performance; versus SMC5J14AHE3/5A, it trades thermal robustness and surge margin for smaller footprint and automated placement compatibility in space-constrained automotive modules.
Availability
SMA5J14AHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA5J14AHE3/5A 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 validation.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMA5J14AHE3/5A under maximum rated surge current?
The SMA5J14AHE3/5A clamps to 23.2 V at its peak pulse current (IPPM) of 21.6 A, measured with a 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet (Document Number: 88875, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMA5J14AHE3/5A maintains this clamping performance across its full operating temperature range.
Is the SMA5J14AHE3/5A suitable for automotive applications?
Yes, the SMA5J14AHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use, as confirmed by its "HE3" suffix and documentation in Vishay's official datasheet. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock testing. The SMA5J14AHE3/5A is commonly deployed in engine control modules, body control units, and infotainment power supplies where reliability under under-hood conditions is critical.
What does the "HE3" and "/5A" suffix mean in SMA5J14AHE3/5A?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification; "/5A" denotes packaging in 13-inch diameter plastic tape and reel with 7500 units per reel. This ordering code ensures traceable, automotive-grade supply chain compliance. The SMA5J14AHE3/5A is distinct from commercial variants like SMA5J14A-E3/5A, which lack AEC-Q101 validation despite identical electrical specs.
How does the thermal resistance of SMA5J14AHE3/5A affect PCB layout?
The SMA5J14AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C during repetitive surges, PCB layout must provide adequate copper area and minimize thermal bottlenecks. Reducing pad size or omitting thermal vias increases RθJA, risking premature thermal failure - a key design constraint for the SMA5J14AHE3/5A in high-duty-cycle applications.
Can SMA5J14AHE3/5A be used in bidirectional configurations?
No, SMA5J14AHE3/5A is a unidirectional TVS diode, as indicated by its "A" (not "CA") suffix and cathode band marking. Bidirectional operation requires the "CA" variant (e.g., SMA5J14CA). Using SMA5J14AHE3/5A in reverse-biased AC or floating signal paths risks catastrophic failure due to forward conduction during negative transients. Always verify polarity alignment in schematic and layout for the SMA5J14AHE3/5A.
SMA5J14AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 21.6A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J14AHE3/5A FAQ
1.How can I place an order for SMA5J14AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14AHE3/5A 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 SMA5J14AHE3/5A reliable?
The price and inventory of SMA5J14AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J14AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J14AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14AHE3/5A?
SMA5J14AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14AHE3/5A 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 SMA5J14AHE3/5A?
For technical support, including SMA5J14AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14AHE3/5A requirements.
6.How does Aetrix verify that SMA5J14AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J14AHE3/5A 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 SMA5J14AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J14AHE3/5A?
All SMA5J14AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14AHE3/5A, 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 SMA5J14AHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J14AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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