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Vishay General Semiconductor - Diodes Division SA7.5AHE3/54
- Part No.:
- SA7.5AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5AHE3/54.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,365
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Product details
Overview
SA7.5AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for overvoltage protection of sensitive electronics. It features 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 12.9 V clamping voltage (VC) at 50 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines against inductive switching transients.
For engineers reviewing the SA7.5AHE3/54 datasheet, SA7.5AHE3/54 pinout, SA7.5AHE3/54 application, or SA7.5AHE3/54 equivalent, this device is selected for robust ESD and surge immunity in automotive-grade (AEC-Q101 qualified), industrial, and telecom power rail and interface line protection where low-leakage (<50 μA at VWM) and fast response (<1 ns) are critical.
Technical Context
The SA7.5AHE3/54 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transient energy into ground. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, enabling consistent clamping performance across temperature (−55 °C to +175 °C).
It delivers 500 W peak pulse power per 10/1000 μs waveform at 0.01 % duty cycle, with 3.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C. The device meets AEC-Q101 qualification and JESD 201 Class 2 whisker resistance requirements due to its matte tin-plated leads and HE3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - defines precise avalanche onset window for reliable triggering |
| VC @ IPPM | 12.9 V at 50 A - clamped voltage during worst-case 10/1000 μs surge, limiting downstream stress |
| IPPM | 50 A - peak surge current capability under standardized transient waveform |
| PPPM | 500 W - transient energy absorption capacity without failure |
| ID @ VWM | <50 μA - ultra-low leakage preserves signal integrity and system quiescent current |
| TJ max. | +175 °C - extended junction temperature range supports under-hood and high-power industrial use |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, molded epoxy case with UL 94 V-0 flammability rating. Cathode indicated by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected circuit's ground or low-side return path in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., VCC, signal rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and long-term reliability under thermal cycling and humidity |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage margin between breakdown and clamping, improving protection headroom |
| Matte tin-plated leads | Enables reliable soldering per J-STD-002 and JESD 22-B102, with JESD 201 Class 2 whisker resistance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and chassis ground to shunt surges exceeding 7.5 V. Use Value: Clamps 12 V rail to ≤12.9 V during 50 A transients, preventing damage to MCU power inputs and LDO regulators. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS connected between signal line and ground to suppress ESD and inductive kickback from solenoid drivers. Use Value: Sub-50 μA leakage avoids loading 4–20 mA loop, while 12.9 V clamping prevents op-amp input saturation during 8 kV contact ESD events. |
| Telecom DC Power Input Protection | Consumer USB Port VBUS Protection |
Use Scenario: Safeguarding PoE-powered network switches' 48 V DC input stage against lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS on main DC input rail upstream of DC/DC converter, configured unidirectionally. Use Value: Withstands repetitive 500 W pulses without parameter drift, maintaining system uptime in outdoor deployments. | Use Scenario: Adding secondary overvoltage protection on USB 2.0 VBUS line in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance TVS placed between VBUS and GND to absorb hot-plug transients and ESD. Use Value: Fast <1 ns response and 7.5 V VWM allow safe operation with 5 V ±5 % tolerance, avoiding false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | Same VWM (7.5 V), but SMA package (surface-mount); lower IPPM (32.5 A) and PPPM (400 W) | Preferred for space-constrained PCBs; not suitable for high-energy 50 A surges | Select SMAJ7.5A only if board layout mandates SMD and surge energy is ≤400 W |
| 1.5KE7.5A | Higher PPPM (1500 W), DO-201 package; larger footprint and higher VC (12.0 V) | Used in legacy high-energy industrial systems; less optimal for tight VC margins | Choose 1.5KE7.5A when >500 W surge handling is required and board area allows DO-201 |
Compared with SMAJ7.5A and 1.5KE7.5A, the SA7.5AHE3/54 uniquely balances 500 W surge capability, 12.9 V clamping, AEC-Q101 qualification, and DO-15 through-hole compatibility - making it optimal for automotive and industrial designs requiring proven reliability and axial lead mechanical robustness.
Availability
SA7.5AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply and full traceability.
Supply support for SA7.5AHE3/54 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 reliability and automotive qualification.
The SAxxA series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and stable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the SA7.5AHE3/54 under a 50 A transient?
The SA7.5AHE3/54 has a maximum clamping voltage (VC) of 12.9 V when subjected to a 50 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C) and ensures downstream components see limited overvoltage during surge events. The SA7.5AHE3/54 maintains this clamping performance across its qualified temperature range.
Is the SA7.5AHE3/54 suitable for automotive applications?
Yes, the SA7.5AHE3/54 is AEC-Q101 qualified and carries the HE3 suffix, indicating compliance with automotive reliability standards including JESD 201 Class 2 whisker resistance and extended temperature operation (−55 °C to +175 °C). It is widely deployed in engine control modules, body electronics, and ADAS sensor interfaces. The SA7.5AHE3/54 meets stringent automotive surge immunity requirements without derating.
What does the "HE3" suffix indicate in SA7.5AHE3/54?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance for matte tin-plated leads. It distinguishes the SA7.5AHE3/54 from commercial-grade "E3" variants and confirms suitability for automotive and high-reliability industrial use. The SA7.5AHE3/54 also complies with UL 94 V-0 flammability requirements via its DO-15 epoxy molding compound.
How does the SA7.5AHE3/54 differ from bidirectional TVS diodes like SA7.5CA?
The SA7.5AHE3/54 is unidirectional and functions only in reverse bias, with polarity marked by a cathode band; SA7.5CA is bidirectional and symmetrical, lacking polarity marking. Unidirectional types offer lower leakage (<50 μA) and tighter VBR tolerance, making the SA7.5AHE3/54 preferable for DC power rail protection. The SA7.5AHE3/54 is not interchangeable with SA7.5CA without circuit redesign.
What is the thermal derating behavior of the SA7.5AHE3/54 above 25 °C ambient?
The SA7.5AHE3/54 follows a linear derating curve for peak pulse power: above TA = 25 °C, PPPM decreases by approximately 0.4 %/°C up to TJ = 175 °C. Steady-state power (PD = 3.0 W) derates from 75 °C lead temperature per Fig. 5. These curves are documented in Vishay's datasheet 88378 and apply directly to the SA7.5AHE3/54 without interpolation.
SA7.5AHE3/54 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- 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)
SA7.5AHE3/54 FAQ
1.How can I place an order for SA7.5AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5AHE3/54 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 SA7.5AHE3/54 reliable?
The price and inventory of SA7.5AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA7.5AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5AHE3/54?
SA7.5AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5AHE3/54 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 SA7.5AHE3/54?
For technical support, including SA7.5AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5AHE3/54 requirements.
6.How does Aetrix verify that SA7.5AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA7.5AHE3/54 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 SA7.5AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA7.5AHE3/54?
All SA7.5AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5AHE3/54, 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 SA7.5AHE3/54 part is unused and in its original packaging.
Return procedure for SA7.5AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.5AHE3/54 Tags
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