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Vishay General Semiconductor - Diodes Division SA11HE3/73
- Part No.:
- SA11HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11HE3/73.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,740
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Product details
Overview
SA11HE3/73 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 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 18.2 V maximum clamping voltage at 27.5 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA11HE3/73 datasheet, SA11HE3/73 pinout, SA11HE3/73 application, or SA11HE3/73 equivalent, this device is selected for robust ESD and surge protection in 12 V automotive subsystems, industrial sensor interfaces, and low-voltage DC power inputs where fast response (<1 ns), low clamping ratio, and high surge current tolerance are required.
Technical Context
This TVS diode operates as a shunt-clamping protector: under normal bias it presents high impedance (>1 µA leakage at 11 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤18.2 V at 27.5 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
The SA11HE3/73 is rated for 70 A non-repetitive forward surge (IFSM), supports continuous power dissipation of 3.0 W on infinite heatsink, and maintains operation across –55 °C to +175 °C junction temperature - enabling deployment in under-hood automotive environments and industrial control cabinets without derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail margin for 12 V systems. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Tight breakdown window ensures predictable turn-on with minimal variation across production lots. |
| VC @ IPPM | 18.2 V at 27.5 A - Clamping voltage during 10/1000 µs surge; limits protected IC voltage stress to <1.7× VWM. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1/2/5a transients. |
| TJ max. | +175 °C - Enables placement near heat sources (e.g., power MOSFETs, motor drivers) without thermal shutdown risk. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥8 kV. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets JESD 201 class 2 whisker test (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during positive transients. |
| Cathode | Protected line connection / transient sensing node | Connected to line being protected (e.g., 12 V rail, CAN_H); color band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over time and temperature; eliminates surface degradation risks in humid or contaminated environments. |
| 500 W peak pulse power (10/1000 µs) | Withstands automotive load-dump surges (ISO 7637-2 Pulse 5a) without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping - critical for protecting 13.5 V absolute-maximum-rated ICs. |
| AEC-Q101 qualification | Validates reliability for automotive ECUs, body controllers, and ADAS sensor modules requiring zero-failure field performance. |
| DO-204AC mechanical robustness | Withstands 275 °C solder dip (10 s) and mechanical shock per JESD22-B110; suitable for wave and reflow assembly. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from battery line transients during ignition switching and alternator load dump. IC Role / Device Role / Timing Role: Shunt clamping TVS placed between LIN line and chassis ground, triggered within <1 ns to clamp spikes to ≤18.2 V. Use Value: Prevents latch-up or gate oxide damage in 5 V/3.3 V logic ICs exposed to ±100 V/50 ms transients per ISO 7637-2. |
Use Scenario: Safeguarding analog outputs of 4–20 mA current-loop sensors against induced surges from nearby AC motor switching. IC Role / Device Role / Timing Role: Connected across sensor output and return, clamping voltage excursions before they reach precision DAC or op-amp stages. Use Value: Maintains signal integrity by limiting transient-induced offset error to <0.5% full scale during 27.5 A surge events. |
| DC Power Input Protection | Automotive Infotainment USB Port |
Use Scenario: Front-end protection for 12 V input stage of industrial SMPS, absorbing energy from inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Placed upstream of input capacitor and rectifier, conducting surge current away from bulk capacitors and controller ICs. Use Value: Extends system MTBF by preventing electrolytic capacitor venting and MOSFET avalanche failure during repeated 500 W pulses. |
Use Scenario: Secondary-level ESD and surge suppression on VBUS line of automotive-grade USB 2.0 ports in head units. IC Role / Device Role / Timing Role: Paired with polymer PTC and common-mode choke; clamps fast ESD (IEC 61000-4-2 ±15 kV) and slower surges (ISO 10605). Use Value: Enables compliance with CISPR 25 Class 5 emissions while maintaining USB enumeration stability after repeated ±8 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/52 (Vishay) | Same VWM (11 V), same DO-214AC (SMA) package, lower PPPM (400 W), higher VC (18.5 V at 23.5 A). | Surface-mount alternative; requires PCB rework; less robust for high-energy automotive pulses. | Select SMAJ11A-E3/52 only if board space constraints prohibit axial DO-15 placement and surge energy is limited to <400 W. |
| P6SMB11A (Littelfuse) | Identical VWM (11 V), same DO-214AA (SMB) package, same 500 W rating, slightly higher VC (19.0 V at 26.3 A), no AEC-Q101 listing. | Drop-in SMT replacement but lacks automotive qualification; not recommended for safety-critical ECUs. | Choose P6SMB11A only for cost-sensitive industrial applications where AEC-Q101 is not mandated and SMB footprint is preferred. |
Compared with SMAJ11A-E3/52 and P6SMB11A, the SA11HE3/73 offers superior automotive reliability via AEC-Q101 qualification and axial-lead mechanical stability, making it the preferred choice for under-hood and chassis-mounted protection where vibration, thermal cycling, and long-term surge endurance are critical.
Availability
SA11HE3/73 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor conditioning, and DC power input protection requiring stable component supply, long-lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for SA11HE3/73 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 passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where fast response, low clamping, and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the SA11HE3/73 under standard surge conditions?
The SA11HE3/73 exhibits a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 27.5 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and reflects worst-case voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 13.5 V absolute-maximum-rated ICs in automotive applications.
Is the SA11HE3/73 suitable for bi-directional transient protection?
No, the SA11HE3/73 is a uni-directional TVS diode, indicated by the "A" suffix (not "CA"). It protects against positive transients on the cathode side relative to anode (ground). For bi-directional protection - such as AC lines or differential buses like RS-485 - a part like SA11CA would be required; the SA11HE3/73 must be used with correct polarity orientation in DC circuits only.
Does the SA11HE3/73 meet automotive qualification standards?
Yes, the SA11HE3/73 carries the HE3 suffix, which denotes AEC-Q101 qualification per Vishay's documentation. This includes testing for high-temperature operating life, temperature cycling, mechanical shock, and ESD (HBM ≥8 kV), confirming suitability for automotive electronic control units, lighting modules, and infotainment systems deployed in production vehicles.
What is the meaning of the "HE3" and "73" in SA11HE3/73?
In SA11HE3/73, "HE3" indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 class 2 whisker resistance; "73" is Vishay's internal packaging code denoting 7-inch reel with 3000-piece quantity. The base part SA11A defines the 11 V stand-off rating and uni-directional functionality - all parameters confirmed in Document Number 88378.
Can the SA11HE3/73 replace the older SA11A without design changes?
Yes, the SA11HE3/73 is a direct replacement for SA11A in both electrical and mechanical terms: identical VWM (11 V), VBR (12.2–13.5 V), VC (18.2 V), DO-204AC package, and pinout. The HE3 suffix adds AEC-Q101 qualification and enhanced plating - no PCB or schematic modifications are needed, and it improves long-term reliability in automotive and industrial deployments.
SA11HE3/73 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 24.9A
- 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)
SA11HE3/73 FAQ
1.How can I place an order for SA11HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11HE3/73 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 SA11HE3/73 reliable?
The price and inventory of SA11HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11HE3/73 is usually 5 days.
3.What payment methods are accepted for SA11HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11HE3/73?
SA11HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11HE3/73 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 SA11HE3/73?
For technical support, including SA11HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11HE3/73 requirements.
6.How does Aetrix verify that SA11HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA11HE3/73 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 SA11HE3/73 meets industry standards.
7.What is the process for return or replacement of SA11HE3/73?
All SA11HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA11HE3/73, 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 SA11HE3/73 part is unused and in its original packaging.
Return procedure for SA11HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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