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Vishay General Semiconductor - Diodes Division SA7.5-E3/54
- Part No.:
- SA7.5-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5-E3/54.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,830
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Product details
Overview
SA7.5-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of sensitive electronics. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V maximum clamping voltage (VC) at 38.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SA7.5-E3/54 datasheet, SA7.5-E3/54 pinout, SA7.5-E3/54 application, or SA7.5-E3/54 equivalent, key selection criteria include its unidirectional polarity, 70 A IFSM surge capability, -55 °C to +175 °C operating junction temperature range, RoHS-compliant matte tin-plated leads, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The SA7.5-E3/54 operates as a silicon avalanche diode that enters controlled reverse breakdown during transient overvoltage events, diverting surge current away from protected circuitry. Its glass-passivated chip junction ensures stable leakage and consistent clamping behavior across temperature and lifetime.
It is rated for 500 W peak pulse power per 10/1000 μs waveform at TA = 25 °C, with derating above 25 °C per published curves. The device exhibits low incremental surge resistance and fast response time-typical of planar passivated TVS diodes-enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown threshold range; ensures reliable triggering within defined tolerance. |
| VC @ IPPM | 12.9 V at 38.8 A - Maximum clamped voltage seen by protected IC/MOSFET during worst-case 500 W transient event. |
| IPPM | 38.8 A - Peak surge current the device safely conducts without failure under 10/1000 μs waveform. |
| PPPM | 500 W - Peak pulse power handling capacity; defines energy absorption capability for standardized surge testing. |
| TJ max. | +175 °C - Maximum junction temperature; enables use in high-ambient environments such as engine compartments or industrial controls. |
| Leakage ID | 50 μA max at VWM - Low reverse leakage preserves signal integrity and minimizes standby power loss in always-on circuits. |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or bias conditions. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., power rail or signal); avalanches into conduction when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and low long-term parameter drift under thermal cycling and humidity stress. |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-line, 2 kV line-to-ground) in industrial and automotive systems. |
| AEC-Q101 qualified | Validated for automotive applications including body control modules, infotainment power rails, and sensor interfaces requiring extended temperature and reliability compliance. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance; suitable for lead-free reflow and wave soldering up to 275 °C for 10 s. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping-critical for protecting 5 V logic, microcontrollers, and MOSFET gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5 V supply lines feeding ECUs, lighting controllers, or CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp positive transients while blocking reverse leakage during normal operation. Use Value: Limits voltage excursion to ≤12.9 V during 38.8 A surge, preventing latch-up or oxide damage in downstream 5 V regulators and microcontrollers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops or 0–10 V sensors) from ESD and field wiring transients in factory automation. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-signal line to suppress both positive-going spikes and negative coupling artifacts. Use Value: Clamps transients within nanoseconds while adding <10 pF capacitance-preserving bandwidth and accuracy of millivolt-level sensor signals. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding USB VBUS and D+/D− lines in portable chargers, docking stations, and peripherals against human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: Used in conjunction with series resistors and filtering capacitors to form a low-cost, discrete ESD protection network. Use Value: Withstands ±15 kV contact discharge per IEC 61000-4-2 while maintaining <50 μA leakage at 5 V-ensuring no impact on USB enumeration or data integrity. | Use Scenario: Front-end protection of AC/DC power inputs and Ethernet PHY interfaces on DSLAMs, base station controllers, and remote radio units. IC Role / Device Role / Timing Role: Mounted at board edge to shunt lightning-induced surges (>1 kV) before they reach upstream rectifiers, fuses, or DC-DC converters. Use Value: Delivers 500 W pulse handling with 175 °C max junction temperature-supporting sustained operation in outdoor telecom enclosures with minimal 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 |
|---|---|---|---|
| SMAJ7.5A | Same VWM (7.5 V), slightly higher VC (13.4 V @ 36.5 A); SMA package (surface-mount, smaller footprint). | Preferred where PCB space is constrained and reflow assembly is used; lacks axial lead mechanical robustness for high-vibration environments. | Select SMAJ7.5A for compact SMT designs; verify thermal relief pad design due to lower PD (3.0 W same, but smaller thermal mass). |
| 1.5KE7.5A | Higher PPPM (1500 W), larger DO-201 package; identical VWM/VBR specs but slower response due to higher junction capacitance. | Better suited for high-energy lightning surges (IEC 61000-4-5) where clamping speed is secondary to energy absorption. | Choose 1.5KE7.5A when system-level surge tests exceed 500 W requirements; accept larger board area and reduced high-frequency performance. |
Compared with SMAJ7.5A and 1.5KE7.5A, the SA7.5-E3/54 offers optimal balance of axial-mount ruggedness, AEC-Q101 qualification, and precise 12.9 V clamping-making it preferred for automotive and industrial applications where mechanical reliability and tight voltage margins are critical.
Availability
SA7.5-E3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and consumer USB port ESD protection requiring stable component supply and full traceability.
Supply support for SA7.5-E3/54 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, cost-effective overvoltage protection in automotive, industrial, and communications infrastructure where repeatable clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the SA7.5-E3/54 under standard test conditions?
The SA7.5-E3/54 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 38.8 A using the 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry will not experience voltage excursions beyond this level during specified surge events. The SA7.5-E3/54 maintains this clamping performance across its full operating temperature range.
Is the SA7.5-E3/54 suitable for automotive applications?
Yes, the SA7.5-E3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, matte tin-plated leads, and operation up to +175 °C junction temperature-meets stringent automotive reliability requirements. The SA7.5-E3/54 is commonly deployed in engine control units, body electronics, and infotainment power supplies where load dump and ISO 7637-2 transient immunity are critical.
What does the "E3/54" suffix indicate in SA7.5-E3/54?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance; "54" refers to the preferred package code for DO-204AC (DO-15) in 13-inch paper tape and reel packaging with 4000 units per reel. This ordering code ensures correct material compliance, plating specification, and logistics configuration for automated assembly. The SA7.5-E3/54 is not AEC-Q101 qualified unless marked with HE3.
How does the SA7.5-E3/54 differ from bi-directional TVS diodes like SA7.5CA?
The SA7.5-E3/54 is unidirectional and functions only as a reverse-biased clamp-its anode must be tied to ground or low potential, and it blocks forward current above ~3.5 V. In contrast, SA7.5CA is bi-directional with symmetrical clamping in both polarities and no polarity marking. The SA7.5-E3/54 provides tighter leakage control (<50 μA) and lower forward voltage drop, making it preferable for DC power rail protection where polarity is fixed.
Can the SA7.5-E3/54 replace the older SA7.5A without design changes?
Yes, the SA7.5-E3/54 is a direct replacement for SA7.5A in terms of electrical specifications, package (DO-204AC), and pinout. Both share identical VWM, VBR, VC, and IPPM values. The E3 suffix adds RoHS compliance and enhanced whisker resistance, but requires no PCB or schematic modifications. The SA7.5-E3/54 retains full compatibility with legacy SA7.5A designs while improving environmental and reliability compliance.
SA7.5-E3/54 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 35A
- 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)
SA7.5-E3/54 FAQ
1.How can I place an order for SA7.5-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5-E3/54 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 SA7.5-E3/54 reliable?
The price and inventory of SA7.5-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5-E3/54 is usually 5 days.
3.What payment methods are accepted for SA7.5-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5-E3/54?
SA7.5-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5-E3/54 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 SA7.5-E3/54?
For technical support, including SA7.5-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5-E3/54 requirements.
6.How does Aetrix verify that SA7.5-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA7.5-E3/54 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 SA7.5-E3/54 meets industry standards.
7.What is the process for return or replacement of SA7.5-E3/54?
All SA7.5-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5-E3/54, 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 SA7.5-E3/54 part is unused and in its original packaging.
Return procedure for SA7.5-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.5-E3/54 Tags
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