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Vishay General Semiconductor - Diodes Division SMA5J14-E3/5A
- Part No.:
- SMA5J14-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14-E3/5A.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,326
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Product details
Overview
SMA5J14-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown range (VBR), 23.2 V clamping voltage at 21.6 A peak pulse current (IPPM), and 500 W peak pulse power rating with 10/1000 µs waveform. It is widely deployed in automotive power supply inputs to protect MOSFETs and microcontrollers from load-dump transients.
For engineers reviewing the SMA5J14-E3/5A datasheet, SMA5J14-E3/5A pinout, SMA5J14-E3/5A application, or SMA5J14-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C maximum junction temperature, AEC-Q101 qualification, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a silicon avalanche diode optimized for transient suppression in DC circuits. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 14 V), while its low incremental surge resistance enables tight clamping during fast-rising surges (e.g., ISO 7637-2 Pulse 5a). The DO-214AC package supports thermal dissipation up to 80 °C/W junction-to-ambient under defined pad layout.
It is rated for non-repetitive 8.3 ms half-sine forward surge current up to 40 A and complies with ANSI/IEEE C62.35 for transient suppressor definitions. The E3 suffix confirms JESD201 Class 1A whisker resistance and RoHS compliance for commercial-grade use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; sets minimum system rail margin for reliable standby operation. |
| VBR (min/max) | 15.6 V / 17.2 V - Measured at 1 mA test current; defines guaranteed avalanche onset window for design margining against tolerance stack-up. |
| VC @ IPPM | 23.2 V - Clamped voltage at 21.6 A peak pulse current (10/1000 µs); determines maximum stress imposed on protected downstream ICs. |
| PPPM | 500 W - Peak pulse power handling capability; validates suitability for automotive load-dump (ISO 7637-2) and industrial switching surge standards. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without derating below full power. |
| RθJA | 80 °C/W - Thermal resistance junction-to-ambient on standard 5 mm × 5 mm copper pads; informs PCB thermal layout requirements for sustained surge duty cycles. |
Pinout & Package
DO-214AC (SMA) surface-mount package with molded epoxy body, matte tin-plated leads, and cathode band marking. Dimensions: 4.93 mm × 2.92 mm × 2.29 mm (L × W × H); compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; forms return path during transient conduction. |
| Cathode (banded end) | High-side surge clamp node | Connected to protected line (e.g., 12 V rail); conducts avalanche current when line voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift due to moisture or contamination ingress. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units, body electronics, and ADAS power domains. |
| MSL Level 1 (260 °C peak) | Enables single-reflow soldering without preconditioning; compatible with standard lead-free reflow profiles. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients; critical for protecting low-voltage logic interfaces (e.g., CAN, LIN) sharing same rail. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to ISO 7637-2 Pulse 5a load-dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and chassis ground to shunt surge energy before it reaches LDOs and MCUs. Use Value: Limits clamped voltage to ≤23.2 V, preserving 3.3 V/5 V logic supply integrity and avoiding latch-up in downstream ASICs. | Use Scenario: 24 V analog sensor outputs (e.g., pressure, temperature) routed across noisy factory floors with motor drive EMI coupling. IC Role / Device Role / Timing Role: Low-capacitance transient clamp on differential signal pair, referenced to local ground plane. Use Value: Suppresses sub-µs ESD events (IEC 61000-4-2) and repetitive switching noise without distorting 0–10 V analog output fidelity. |
| Consumer USB Power Port Protection | Telecom DC Feeder Surge Suppression |
Use Scenario: 5 V USB-C power delivery ports in portable docking stations subjected to hot-plug inrush and cable-induced transients. IC Role / Device Role / Timing Role: Primary unidirectional TVS on VBUS line, upstream of USB PD controller and load switch. Use Value: Withstands 500 W peak pulses while maintaining <1 µA leakage at 5 V, ensuring no impact on USB enumeration or power negotiation timing. | Use Scenario: -48 V DC telecom feeder lines entering base station cabinets exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level surge protector mounted at cabinet entry point, coordinated with upstream GDTs. Use Value: Provides precise 23.2 V clamping to protect PoE controllers and Ethernet PHYs without triggering upstream overvoltage shutdowns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14AHE3/5A | AEC-Q101 qualified variant with identical electrical specs; uses HE3 suffix denoting enhanced whisker resistance (JESD201 Class 2). | Required for automotive safety-critical modules where extended whisker reliability is mandated beyond standard AEC-Q101. | Select SMA5J14AHE3/5A when qualifying for ASIL-B systems or long-life under-hood deployments exceeding 15 years. |
| SMCJ14A-E3/57T | Higher 1500 W PPPM, DO-214AB (SMC) package (larger footprint), 23.2 V VC at 64.5 A IPPM; otherwise identical VWM/VBR ratings. | Suitable for higher-energy surge environments (e.g., industrial motor drives) where PCB space allows larger SMC package. | Choose SMCJ14A-E3/57T only if system-level testing confirms >500 W surge exposure and layout accommodates 7.11 mm × 6.22 mm footprint. |
Compared with SMA5J14-E3/5A, SMA5J14AHE3/5A offers identical surge performance with enhanced mechanical reliability for automotive, while SMCJ14A-E3/57T trades smaller size for triple the power handling-making SMA5J14-E3/5A optimal for space-constrained, cost-sensitive 500 W-class protection.
Availability
SMA5J14-E3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer USB power delivery systems requiring stable component supply and full traceability.
Supply support for SMA5J14-E3/5A 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 transient suppressors with emphasis on reliability, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained DC systems, targeting automotive, industrial, and telecom applications where robustness against ISO 7637, IEC 61000-4-5, and ESD events is mandatory.
FAQ
What is the polarity configuration of the SMA5J14-E3/5A?
The SMA5J14-E3/5A is a unidirectional transient voltage suppressor diode. Its cathode is marked by a visible band on the DO-214AC package body, and it conducts only when the cathode is at a higher potential than the anode-making it suitable for DC rail protection where reverse voltage is not expected. This differs from bi-directional variants like SMA5J14CA, which lack polarity marking and suppress surges in both directions.
Does the SMA5J14-E3/5A meet automotive reliability standards?
Yes, the SMA5J14-E3/5A is RoHS-compliant and meets JESD201 Class 1A whisker resistance requirements. While the base E3 suffix denotes commercial-grade qualification, the identical-specification SMA5J14AHE3/5A variant carries full AEC-Q101 qualification. For automotive designs requiring formal AEC-Q101 certification, that HE3-suffixed part must be selected-SMA5J14-E3/5A itself is not AEC-Q101 certified.
What is the maximum clamping voltage of the SMA5J14-E3/5A under surge conditions?
The SMA5J14-E3/5A has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 21.6 A using the standard 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and represents the upper bound of voltage seen by protected circuitry during worst-case surge events.
Can the SMA5J14-E3/5A be used in bidirectional signal line protection?
No, the SMA5J14-E3/5A is strictly unidirectional and unsuitable for bidirectional signal lines such as RS-485, CAN, or USB D+/D−. Using it on AC or bipolar signals would result in forward conduction during negative half-cycles, causing malfunction or damage. For such applications, a bi-directional variant like SMA5J14CA must be selected-its symmetric VBR and absence of polarity marking enable suppression in both voltage polarities.
What is the thermal resistance specification for the SMA5J14-E3/5A?
The SMA5J14-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and defines the temperature rise above ambient per watt of average power dissipated-critical for estimating safe operating area during repetitive surge events or elevated ambient temperatures in enclosed enclosures.
SMA5J14-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J14-E3/5A FAQ
1.How can I place an order for SMA5J14-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14-E3/5A 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 SMA5J14-E3/5A reliable?
The price and inventory of SMA5J14-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J14-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J14-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14-E3/5A?
SMA5J14-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14-E3/5A 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 SMA5J14-E3/5A?
For technical support, including SMA5J14-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14-E3/5A requirements.
6.How does Aetrix verify that SMA5J14-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J14-E3/5A 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 SMA5J14-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J14-E3/5A?
All SMA5J14-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14-E3/5A, 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 SMA5J14-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J14-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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