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Vishay General Semiconductor - Diodes Division SA54A-E3/73
- Part No.:
- SA54A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA54A-E3/73.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,565
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Product details
Overview
SA54A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on power and signal lines. It features 54 V standoff voltage (VWM), 60–66.3 V breakdown range (VBR at 1 mA), 87.1 V max clamping voltage at 5.7 A (10/1000 μs), 500 W peak pulse power, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA54A-E3/73 datasheet, SA54A-E3/73 pinout, SA54A-E3/73 application, or SA54A-E3/73 equivalent, this device is selected for robust overvoltage protection in DC power rails, sensor interfaces, and MOSFET gate drivers where fast response (<1 ns), low clamping ratio, and stable junction temperature up to +175 °C are required.
Technical Context
The SA54A-E3/73 employs a glass-passivated silicon junction optimized for transient suppression with minimal incremental surge resistance. Its unidirectional polarity enables asymmetric clamping-forward conduction only during reverse overvoltage events-making it suitable for DC-biased lines where forward voltage drop must be minimized during normal operation.
It operates across -55 °C to +175 °C junction temperature, supports 70 A non-repetitive forward surge current (10 ms half-sine), and maintains stable clamping performance under repetitive 0.01% duty cycle pulses. The 3.0 W steady-state power dissipation rating requires thermal management at lead temperature ≤75 °C per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR (min/max) | 60.0 / 66.3 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on within design tolerance. |
| VC @ IPPM | 87.1 V at 5.7 A (10/1000 μs) - Peak clamped voltage during worst-case surge; determines protected circuit's maximum stress level. |
| PPPM | 500 W - Peak pulse power handling capability; validates immunity to IEC 61000-4-5 Level 4 surges. |
| IFSM | 70 A - Non-repetitive forward surge current rating; supports inrush or fault-current events without failure. |
| TJ max | +175 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | DO-15 (DO-204AC) - Standard axial-leaded through-hole package; compatible with legacy PCB layouts and wave soldering. |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads; cathode indicated by color band on body. Leads conform to J-STD-002 and JESD 22-B102 solderability standards; rated for solder dip at 275 °C max for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to lower-potential side of protected line; conducts during reverse overvoltage events only when cathode is at higher potential. |
| Cathode (banded end) | Clamping reference terminal | Connected to higher-potential rail (e.g., VCC); defines clamping voltage relative to this node during transients. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable leakage current (<1.0 µA at VWM) and long-term reliability under thermal cycling and humidity. |
| 500 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 surge immunity testing up to 4 kV open-circuit voltage with appropriate source impedance. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Low incremental clamping resistance | Ensures tight VC–VBR spread (ΔV = 27.1 V), minimizing voltage overshoot during fast-rising transients. |
| Fast response time (<1 ns) | Clamps before sensitive downstream ICs (e.g., microcontrollers, CAN transceivers) experience damaging overvoltage. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and chassis ground to clamp reverse-polarity spikes and inductive kickback. Use Value: Limits peak voltage to ≤87.1 V during 5.7 A surges, preventing damage to 60 V-rated power management ICs and gate drivers. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS connected across signal and ground to suppress ESD (IEC 61000-4-2) and cable discharge events. Use Value: Sub-1 ns response and <1.0 µA leakage at 54 V preserve signal integrity and offset accuracy in 16-bit ADC front-ends. |
| MOSFET Gate Driver Protection | DC Power Supply Input Stage |
Use Scenario: Safeguarding high-side N-channel MOSFET gates driven by isolated gate drivers in motor inverters. IC Role / Device Role / Timing Role: Clamps Miller-induced voltage spikes on gate-to-source path during switching transitions. Use Value: With 60–66.3 V VBR, it prevents gate oxide breakdown while allowing full 12–15 V drive swing during normal operation. | Use Scenario: Front-end protection for 48 V telecom rectifier modules exposed to lightning-induced surges on AC input lines. IC Role / Device Role / Timing Role: Primary TVS in series with MOV and fuse on secondary DC bus to absorb residual energy after upstream suppression. Use Value: 500 W PPPM and 70 A IFSM enable single-device handling of combined surge and inrush events without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/5A | Same VWM (54 V), but SMA package (surface-mount); lower IPPM (5.4 A vs. 5.7 A); same VC (87.1 V). | Requires PCB rework for SMT layout; better suited for space-constrained designs with automated assembly. | Select SMAJ54A-E3/5A when board real estate is limited and thermal pad access allows adequate power dissipation. |
| 1.5KE54A | Higher PPPM (1500 W), larger DO-201 package; VC = 93.6 V at 16.1 A; not AEC-Q101 qualified. | Used in industrial power supplies where higher surge margin is needed but automotive qualification is unnecessary. | Choose 1.5KE54A only if system-level surge testing exceeds 500 W requirements and AEC-Q101 is not mandated. |
Compared with SMAJ54A-E3/5A and 1.5KE54A, the SA54A-E3/73 offers optimal balance of automotive qualification, through-hole manufacturability, and precise 54 V clamping for 48 V system protection-without requiring PCB redesign or sacrificing reliability in harsh environments.
Availability
SA54A-E3/73 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, DC power supply inputs, and MOSFET gate driver circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SA54A-E3/73 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 automotive-grade qualification.
The SAxxA series is engineered specifically for robust transient suppression in 12 V, 24 V, and 48 V automotive and industrial power systems-delivering consistent clamping performance across extreme temperature and surge conditions.
FAQ
What is the maximum clamping voltage of the SA54A-E3/73 under standard test conditions?
The SA54A-E3/73 has a maximum clamping voltage (VC) of 87.1 V when subjected to a 10/1000 μs waveform at 5.7 A peak pulse current. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The SA54A-E3/73 maintains this clamping performance across its full operating temperature range.
Is the SA54A-E3/73 suitable for automotive applications?
Yes, the SA54A-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, DO-15 package with matte tin leads, and operation from -55 °C to +175 °C-meets stringent automotive reliability requirements. The SA54A-E3/73 is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces.
How does the SA54A-E3/73 differ from bidirectional TVS diodes like SA54CA?
The SA54A-E3/73 is unidirectional and features polarity marking (cathode band), enabling asymmetric clamping ideal for DC-biased lines. In contrast, SA54CA is bidirectional with no polarity marking and identical clamping in both directions. The SA54A-E3/73 exhibits lower leakage at VWM and supports forward conduction, whereas SA54CA does not conduct in forward bias.
What is the steady-state power dissipation rating for the SA54A-E3/73?
The SA54A-E3/73 has a steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. Derating is required above this temperature per Figure 5 in the datasheet. This rating governs continuous power handling during sustained overvoltage or leakage conditions-not transient suppression.
Can the SA54A-E3/73 be used in parallel for higher surge current handling?
No-parallel connection of SA54A-E3/73 devices is not recommended due to parameter mismatch (VBR tolerance ±5%) causing uneven current sharing and potential thermal runaway. For higher surge capacity, select a single higher-rated device such as 1.5KE54A or use coordinated staged protection with MOVs and gas discharge tubes upstream of the SA54A-E3/73.
SA54A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA54A-E3/73 FAQ
1.How can I place an order for SA54A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA54A-E3/73 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 SA54A-E3/73 reliable?
The price and inventory of SA54A-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA54A-E3/73 is usually 5 days.
3.What payment methods are accepted for SA54A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA54A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA54A-E3/73?
SA54A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA54A-E3/73 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 SA54A-E3/73?
For technical support, including SA54A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA54A-E3/73 requirements.
6.How does Aetrix verify that SA54A-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA54A-E3/73 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 SA54A-E3/73 meets industry standards.
7.What is the process for return or replacement of SA54A-E3/73?
All SA54A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA54A-E3/73, 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 SA54A-E3/73 part is unused and in its original packaging.
Return procedure for SA54A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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