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Vishay General Semiconductor - Diodes Division SA7.0HE3/73
- Part No.:
- SA7.0HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.0HE3/73.pdf
- Description:
- TVS DIODE 7VWM 13.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,735
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Product details
Overview
SA7.0HE3/73 from Vishay General Semiconductor is a unidirectional 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 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 41.7 V clamping voltage (VC) at 150 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA7.0HE3/73 datasheet, SA7.0HE3/73 pinout, SA7.0HE3/73 application, or SA7.0HE3/73 equivalent, this device is selected for robust ESD and surge immunity in automotive body control modules, industrial sensor interfaces, and 12 V supply rail protection where fast response (<1 ns), low clamping ratio, and high reliability under repetitive transients are required.
Technical Context
The SA7.0HE3/73 operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to voltage transients. Its clamping behavior is defined by a 10/1000 µs waveform, with 41.7 V maximum clamping voltage at 150 A IPPM and 3.5 V forward voltage at 100 A IFSM - critical for minimizing let-through energy during surge events.
Thermal performance is governed by a 175 °C max junction temperature and 3.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C. The device meets JESD 22-B106 solderability (275 °C, 10 s) and JESD 201 Class 2 whisker resistance, confirming suitability for automated assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before conduction begins; sets safe DC bias margin for 12 V systems. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - ensures predictable avalanche onset across process variation and temperature. |
| VC @ IPPM | 41.7 V at 150 A - limits transient voltage seen by downstream ICs during 10/1000 µs surges. |
| PPPM | 500 W - peak pulse power handling capability per standard 10/1000 µs waveform, duty cycle ≤ 0.01 %. |
| IFSM | 70 A - non-repetitive forward surge current rating (10 ms half-sine), supports load dump immunity. |
| TJ max | 175 °C - enables operation in under-hood automotive environments without derating penalties. |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with UL 94 V-0 molded epoxy and matte tin-plated leads. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, cylindrical epoxy body with cathode band marking. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Polarity: color band denotes cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference node | Connected to lower-potential side (e.g., ground or return path); defines unidirectional conduction direction. |
| Cathode (banded end) | Avalanche clamping node / transient sink | Connected to protected line (e.g., 12 V rail); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under thermal cycling and humidity stress. |
| 500 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 Level 3 surges without degradation. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, lighting modules, and infotainment power supplies. |
| Low incremental surge resistance | Minimizes VC – VBR differential (clamping ratio ~5.4× VWM), reducing stress on protected ICs. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability automotive assemblies over 15+ year service life. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and inductive switching transients in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground, clamping transients within 1 ns to prevent latch-up or gate oxide damage. Use Value: With 41.7 V clamping at 150 A and 7.0 V stand-off, it maintains LIN signal integrity while surviving repeated 12 V system surges up to 500 W. | Use Scenario: Safeguarding 4–20 mA current loop inputs in PLC analog input cards against field wiring faults and ESD. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the loop supply rail, positioned upstream of precision shunt regulators and op-amps. Use Value: 7.0 V VWM allows full compliance with 24 V nominal loop headroom; 500 W rating handles 200 V/1 A surge events per IEC 61000-4-4. |
| 12 V Automotive Power Rail Protection | Consumer Appliance Motor Driver Supply |
Use Scenario: Secondary protection on fused 12 V distribution lines feeding ADAS camera modules and radar power supplies. IC Role / Device Role / Timing Role: Fast-acting crowbar element that diverts surge energy away from LDOs and PMICs during battery reversal or jump-start events. Use Value: AEC-Q101 qualification and 175 °C TJ max ensure uninterrupted operation in hot under-hood locations; 70 A IFSM supports load dump immunity. | Use Scenario: Input-stage surge suppression for BLDC motor driver boards in smart washing machines and HVAC fans. IC Role / Device Role / Timing Role: Stand-off protector on the 12–24 V DC bus, absorbing commutation spikes from MOSFET half-bridges. Use Value: 500 W peak pulse rating and 41.7 V clamping limit MOSFET VDS stress during inductive kickback, extending FET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0AHE3/A | Same VWM (7.0 V), identical DO-214AC (SMA) package; 41.7 V VC at 150 A, but rated for 400 W PPPM. | Surface-mount alternative; requires PCB rework for SMT assembly; lower thermal mass than DO-15. | Select when board space is constrained and automated pick-and-place is preferred over through-hole mounting. |
| 1.5KE7.0A | Higher PPPM (1500 W), larger DO-201AD package; same VWM/VBR range but 12.0 V VC at 100 A - significantly higher clamping voltage. | Used in high-energy industrial AC line protection; less suitable for low-voltage DC rail clamping due to poor clamping ratio. | Select only if surge energy exceeds 500 W and system can tolerate >12 V clamping overshoot. |
Compared with SMAJ7.0AHE3/A and 1.5KE7.0A, the SA7.0HE3/73 offers optimal balance of clamping performance, AEC-Q101 qualification, and through-hole manufacturability for 12 V automotive and industrial DC systems - delivering precise 7.0 V standoff with minimal let-through voltage under standardized surge conditions.
Availability
SA7.0HE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer appliance power supply protection requiring stable component supply and long-term lifecycle support.
Supply support for SA7.0HE3/73 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturing.
The SAxxA series is engineered specifically for robust transient suppression in 12 V and 24 V automotive and industrial power systems, prioritizing low clamping voltage, fast response, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of the SA7.0HE3/73 under a 10/1000 µs surge?
The SA7.0HE3/73 has a maximum clamping voltage (VC) of 41.7 V at 150 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and reflects the voltage seen by protected circuitry during worst-case transient events. The SA7.0HE3/73 maintains this clamping performance across its qualified temperature range and after repeated surge exposures.
Is the SA7.0HE3/73 suitable for automotive applications?
Yes, the SA7.0HE3/73 is AEC-Q101 qualified and explicitly rated for automotive use per Vishay documentation. Its DO-204AC package, 175 °C max junction temperature, JESD 201 Class 2 whisker resistance, and compliance with ISO 7637-2 surge test profiles make it appropriate for body control modules, lighting drivers, and infotainment power rails. The SA7.0HE3/73 meets all stress requirements for under-hood and cabin-mounted electronic control units.
What does the "HE3" suffix indicate in SA7.0HE3/73?
The "HE3" suffix in SA7.0HE3/73 denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. Per Vishay's ordering nomenclature, "H" indicates AEC-Q101 qualification, "E3" specifies RoHS-compliant matte tin plating, and the "73" denotes tape-and-reel packaging in 7-inch reels (4000 pcs). The SA7.0HE3/73 is not a commercial-grade part - it is fully automotive-qualified.
How does the SA7.0HE3/73 differ from the bi-directional SA7.0CA variant?
The SA7.0HE3/73 is unidirectional, with a cathode band marking and forward conduction capability, whereas SA7.0CA is bi-directional and unmarked. Electrically, SA7.0HE3/73 has asymmetric behavior: it blocks 7.0 V in reverse and conducts forward above ~0.7 V, while SA7.0CA clamps equally in both directions starting at ~7.78 V. The SA7.0HE3/73 is used on DC rails with defined polarity; SA7.0CA suits AC-coupled or bidirectional signal lines like CAN or USB.
What is the maximum steady-state power dissipation for the SA7.0HE3/73?
The SA7.0HE3/73 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C, per Figure 5 in datasheet 88378. This rating applies to continuous DC leakage or low-duty-cycle operation - not transient suppression. For reliable long-term operation, design must ensure junction temperature remains ≤175 °C using appropriate PCB copper area or heatsinking, especially in enclosed automotive enclosures.
SA7.0HE3/73 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 37.6A
- 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)
SA7.0HE3/73 FAQ
1.How can I place an order for SA7.0HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.0HE3/73 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 SA7.0HE3/73 reliable?
The price and inventory of SA7.0HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.0HE3/73 is usually 5 days.
3.What payment methods are accepted for SA7.0HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.0HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.0HE3/73?
SA7.0HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.0HE3/73 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 SA7.0HE3/73?
For technical support, including SA7.0HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.0HE3/73 requirements.
6.How does Aetrix verify that SA7.0HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA7.0HE3/73 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 SA7.0HE3/73 meets industry standards.
7.What is the process for return or replacement of SA7.0HE3/73?
All SA7.0HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.0HE3/73, 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 SA7.0HE3/73 part is unused and in its original packaging.
Return procedure for SA7.0HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.0HE3/73 Tags
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