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Vishay General Semiconductor - Diodes Division SA14HE3/54
- Part No.:
- SA14HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14HE3/54.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,978
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Product details
Overview
SA14HE3/54 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive use. It protects MOSFETs and ICs against inductive switching transients in engine control units and power supply rails.
For engineers reviewing the SA14HE3/54 datasheet, SA14HE3/54 pinout, SA14HE3/54 application, or SA14HE3/54 equivalent, key selection criteria include clamping voltage (23.2 V at 21.6 A), low incremental surge resistance, fast response time, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability standards.
Technical Context
The SA14HE3/54 operates as a uni-directional avalanche diode with glass-passivated junction, delivering precise voltage clamping during transient events. Its 10/1000 μs waveform rating supports repetitive surge handling up to 0.01% duty cycle, and its 175 °C maximum junction temperature enables operation in under-hood automotive environments.
Designed for unidirectional polarity, it features a cathode band marking, 3.5 V maximum forward voltage at 100 A, and 70 A non-repetitive peak forward surge current (IFSM). The device complies with AEC-Q101 stress testing and meets UL 94 V-0 flammability requirements via its molded epoxy case.
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 1.0 mA - Ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPPM | 23.2 V at 21.6 A - Clamping voltage limits downstream component stress during 500 W transient |
| PPPM | 500 W - Peak pulse power handling capability per 10/1000 μs standard waveform |
| IFSM | 70 A - Withstands 10 ms half-sine surge without degradation, critical for load-dump protection |
| TJ max | 175 °C - Enables deployment in high-temperature automotive zones (e.g., powertrain modules) |
| Leakage (ID) | 1.0 μA at 14 V - Minimal standby current preserves battery life in always-on systems |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case with UL 94 V-0 rating; matte tin-plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; conducts during forward surge or bias |
| Cathode (banded end) | Avalanche clamping terminal | Connected to higher-potential rail; initiates clamping when reverse voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR over temperature and long-term reliability in harsh environments |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| 500 W peak pulse power (10/1000 μs) | Provides robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges |
| Low incremental clamping resistance | Minimizes voltage overshoot during fast transients, reducing risk of IC latch-up or gate oxide damage |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance, suitable for high-reliability solder-reflow processes |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital I/O Module |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load-dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role: Uni-directional TVS placed between VBAT and ground, clamping transients above 14 V. Use Value: Limits clamped voltage to 23.2 V at 21.6 A, preventing damage to 3.3 V/5 V logic and ensuring ASIL-B compliance. | Use Scenario: Shields 24 V DC digital input circuits from relay coil flyback and field wiring ESD in factory automation cabinets. IC Role / Device Role: Standoff-rated TVS on input line, absorbing 500 W surges induced by contactor switching. Use Value: Fast response and low leakage (<1 μA) maintain signal integrity while enabling fail-safe open-circuit detection. |
| Telecom Power Supply Input Stage | Consumer Appliance Motor Drive Board |
Use Scenario: Safeguards AC-DC front-end rectifiers and PFC controllers against lightning-induced surges on primary-side inputs. IC Role / Device Role: Secondary-side uni-directional clamp on +12 V bias rail feeding PWM controllers and optocouplers. Use Value: 175 °C TJ max allows placement near heat-generating transformers without derating loss. | Use Scenario: Protects H-bridge gate drivers and MCU reset lines from commutation spikes in BLDC fan or pump modules. IC Role / Device Role: Localized TVS on 5 V logic rail adjacent to motor driver ICs. Use Value: 23.2 V clamping ensures gate oxide safety margin for 20 V-rated MOSFETs and prevents false resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/52 | Same VWM (14 V), identical DO-214AC package, but lower PPPM (400 W) and higher VC (23.2 V → 25.8 V) | Less robust for sustained surge events; suited for space-constrained PCBs where DO-214AC footprint is mandatory | Select SMAJ14A-E3/52 only if board layout prohibits axial DO-15 and surge energy remains below 400 W |
| 1.5KE14A | Higher PPPM (1500 W), larger DO-201AD package, same VWM/VBR range, but no AEC-Q101 qualification | Used in industrial power supplies requiring higher energy absorption, not automotive-qualified | Choose 1.5KE14A for non-automotive high-energy surge zones; avoid where AEC-Q101 or lead-free whisker resistance is required |
Compared with SMAJ14A-E3/52 and 1.5KE14A, SA14HE3/54 uniquely combines AEC-Q101 qualification, DO-15 form factor, 500 W capability, and JESD 201 Class 2 whisker resistance-making it optimal for automotive-grade compact designs needing certified reliability.
Availability
SA14HE3/54 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power supplies, and consumer appliance motor drives requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SA14HE3/54 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 automotive, industrial, and computing applications.
The SAxx series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-speed, high-energy transient suppression in demanding environments where clamping precision, thermal stability, and qualification compliance are critical.
FAQ
What is the clamping voltage of SA14HE3/54 and how is it measured?
The SA14HE3/54 has a maximum clamping voltage (VC) of 23.2 V at 21.6 A peak pulse current (IPPM), tested using the standardized 10/1000 μs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during a 500 W transient event, directly measured across the device terminals under specified test conditions defined in the Vishay datasheet 88378.
Is SA14HE3/54 suitable for automotive applications?
Yes, SA14HE3/54 is AEC-Q101 qualified and manufactured with HE3 suffix indicating compliance with JESD 201 Class 2 whisker resistance and RoHS requirements. Its 175 °C maximum junction temperature, glass-passivated junction, and validated surge performance make it suitable for engine control units, body control modules, and ADAS power domains where automotive-grade reliability is mandated.
What does the "HE3/54" suffix mean in SA14HE3/54?
The "HE3" suffix denotes AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, while "/54" specifies the preferred packaging code: 4000-piece 13-inch paper tape and reel. This full designation confirms the part meets automotive reliability standards and ships in industry-standard surface-mount compatible carrier format despite its axial DO-15 package.
How does SA14HE3/54 differ from bi-directional TVS diodes like SA14CA?
SA14HE3/54 is uni-directional with cathode band marking and conducts forward current up to 70 A (IFSM); SA14CA is bi-directional with no polarity marking and symmetric clamping in both directions. SA14HE3/54 is used where DC bias exists (e.g., VBAT lines), whereas SA14CA suits AC-coupled or floating signal lines-SA14HE3/54 cannot replace SA14CA without circuit redesign.
What is the thermal derating behavior of SA14HE3/54 above 25 °C ambient?
SA14HE3/54 follows Vishay's standard derating curve: peak pulse power remains at 100% up to 25 °C, then linearly decreases to ~50% at 125 °C ambient, and reaches zero at 175 °C junction temperature. Steady-state power dissipation (PD = 3.0 W) also derates from 75 °C lead temperature per Figure 5 in datasheet 88378, requiring appropriate PCB copper area for thermal management in high-power applications.
SA14HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA14HE3/54 FAQ
1.How can I place an order for SA14HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14HE3/54 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 SA14HE3/54 reliable?
The price and inventory of SA14HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14HE3/54 is usually 5 days.
3.What payment methods are accepted for SA14HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14HE3/54?
SA14HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14HE3/54 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 SA14HE3/54?
For technical support, including SA14HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14HE3/54 requirements.
6.How does Aetrix verify that SA14HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA14HE3/54 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 SA14HE3/54 meets industry standards.
7.What is the process for return or replacement of SA14HE3/54?
All SA14HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA14HE3/54, 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 SA14HE3/54 part is unused and in its original packaging.
Return procedure for SA14HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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