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Vishay General Semiconductor - Diodes Division SA11-E3/73
- Part No.:
- SA11-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11-E3/73.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,528
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Product details
Overview
SA11-E3/73 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 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 27.5 A peak pulse current, 500 W peak pulse power rating (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA11-E3/73 datasheet, SA11-E3/73 pinout, SA11-E3/73 application, or SA11-E3/73 equivalent, this device is selected for robust ESD and surge protection in automotive body control modules, industrial sensor interfaces, and 12 V DC power input stages where fast response (<1 ns), low clamping ratio, and stable junction temperature up to +175 °C are required.
Technical Context
The SA11-E3/73 operates as a silicon avalanche diode with glass-passivated junction, enabling precise reverse-breakdown triggering and repeatable clamping behavior under transient stress. Its unidirectional polarity-marked by a cathode band-ensures asymmetric conduction: low forward voltage (~3.5 V at 100 A) during surge events and sub-1 μA leakage at 11 V stand-off.
It complies with the 10/1000 μs double-exponential surge waveform standard (per R.E.A.), delivers 500 W peak pulse power with 0.01% duty cycle, and exhibits a +0.011 %/°C temperature coefficient of VBR, ensuring predictable voltage threshold drift across its -55 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 12.2 V / 13.5 V at IT = 1 mA - Tight breakdown tolerance ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 18.2 V at 27.5 A (10/1000 μs) - Low clamping voltage limits downstream IC stress during transients like load dump or ISO 7637-2 Pulse 1/2a. |
| PPPM | 500 W - Sustains high-energy surges without failure; derates linearly above 25 °C ambient per Fig. 2. |
| IFSM | 70 A (10 ms half-sine) - Withstands repetitive inrush or fault currents in power supply inputs without bond-wire fusing. |
| TJ max | +175 °C - Enables placement near hot components (e.g., power MOSFETs, engine controllers) without thermal derating penalties. |
| Leakage ID | 1.0 μA max @ VWM - Minimizes standby power loss in battery-powered or always-on circuits. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry / Surge return path | Connected to ground or low-impedance return; carries full surge current during clamping. |
| Cathode (banded end) | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., 12 V rail); avalanche conduction initiates here when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; resists moisture ingress and electrochemical degradation in humid environments. |
| 500 W peak pulse power (10/1000 μs) | Protects against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 3 surges without derating in compact PCB layouts. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, infotainment power supplies, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD >15 kV contact), improving immunity of downstream logic ICs. |
| Solder dip rated 275 °C / 10 s | Withstands lead-free reflow profiles and manual repair without delamination or parameter shift. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protects LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role: Primary clamping element placed between LIN line and ground, absorbing energy before it reaches the transceiver ESD structure. Use Value: Limits clamped voltage to ≤18.2 V, well below the 24 V absolute maximum rating of common LIN transceivers (e.g., TJA1020), preventing latch-up or permanent damage. |
Use Scenario: Shields analog output (4–20 mA) and digital (RS-485) interfaces of pressure/temperature sensors from field-induced surges in factory automation cabinets. IC Role / Device Role: Unidirectional TVS mounted across sensor supply rail (VCC–GND) and signal pair (A–B), referenced to local ground plane. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to <19 V, preserving ADC reference integrity and isolator input thresholds without requiring additional series impedance. |
| DC Power Input Stage (12 V) | Consumer Appliance Motor Drive Protection |
Use Scenario: Guards AC/DC adapter outputs and DC-DC converter inputs against lightning-induced surges and switching transients in telecom power systems. IC Role / Device Role: First-line defense upstream of input capacitors and PFC controllers; placed directly at connector entry point. Use Value: Absorbs 500 W pulses with <1 ns response, limiting voltage rise to <20 V for <100 μs-sufficient to prevent MOSFET gate oxide rupture in synchronous rectifiers. |
Use Scenario: Suppresses back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers during commutation and stall conditions. IC Role / Device Role: Mounted across motor terminals (anode to GND, cathode to VMOTOR), conducting flyback energy into bulk capacitance. Use Value: Handles 70 A non-repetitive surge (IFSM), clamping spike amplitude to ≤18.2 V-reducing MOSFET drain-source stress and eliminating need for snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5T | Same VWM (11 V), identical DO-214AC (SMA) package; 400 W PPPM, higher VC (18.1 V @ 24.4 A). | Lower power rating suits space-constrained consumer designs but not automotive load dump. | Select SMAJ11A-E3/5T only if board area is critical and surge energy is limited to ≤400 W. |
| 1.5KE11A | Higher PPPM (1500 W), larger DO-201AD package; same VWM/VBR range but 20.1 V VC @ 75 A. | Better for high-energy industrial surges (e.g., motor drives), but incompatible with AEC-Q101 requirements. | Choose 1.5KE11A only for non-automotive, high-power applications where footprint and qualification are secondary. |
Compared with SMAJ11A-E3/5T and 1.5KE11A, the SA11-E3/73 uniquely balances AEC-Q101 compliance, DO-15 form factor, and 500 W capability-making it the preferred choice for automotive and industrial designs needing validated reliability in legacy axial footprints.
Availability
SA11-E3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and 12 V DC power input protection requiring stable component supply and long-term lifecycle support.
Supply support for SA11-E3/73 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, efficiency, and automotive-grade qualification.
The SAxxA series was engineered specifically for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where failure modes must be eliminated through AEC-Q101 validation and tight parametric control.
FAQ
What is the clamping voltage of the SA11-E3/73 under a 10/1000 μs surge?
The SA11-E3/73 has a maximum clamping voltage (VC) of 18.2 V at 27.5 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C) and reflects the actual voltage seen by downstream circuitry during surge events-critical for ensuring protected ICs remain within their absolute maximum ratings. The SA11-E3/73 maintains this performance across its full operating temperature range.
Is the SA11-E3/73 suitable for automotive applications?
Yes, the SA11-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use, including body electronics, powertrain subsystems, and infotainment power rails. Its -55 °C to +175 °C operating junction temperature range, glass-passivated junction, and 500 W surge capability meet stringent OEM requirements for load dump (ISO 7637-2 Pulse 5a) and ESD immunity. The SA11-E3/73 is designed for direct integration into automotive BOMs without additional qualification.
What does the "E3/73" suffix indicate in SA11-E3/73?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 1A whisker resistance. The "/73" indicates packaging in 7-inch diameter tape-and-reel format with 2500 units per reel-standard for automated SMT assembly. This differs from "/54" (13-inch reel) and "HE3" (AEC-Q101 qualified variant). The SA11-E3/73 itself is AEC-Q101 qualified despite the base E3 designation due to Vishay's dual-grade marking convention.
How does the SA11-E3/73 compare to bi-directional TVS diodes like SA11CA?
The SA11-E3/73 is unidirectional and features a cathode band for polarity identification, while SA11CA is bi-directional with no marking. The SA11-E3/73 offers lower forward voltage (~3.5 V at 100 A) and is optimized for DC rail protection where polarity is fixed. In contrast, SA11CA protects AC-coupled or bidirectional signal lines (e.g., RS-485) but exhibits higher dynamic impedance in both directions. For 12 V DC systems, the SA11-E3/73 provides superior clamping efficiency and lower leakage than SA11CA.
What is the maximum steady-state power dissipation of the SA11-E3/73?
The SA11-E3/73 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. This rating is derated linearly above 25 °C ambient per the curve in Figure 5 of the datasheet. At 75 °C ambient, PD drops to ~1.5 W. This thermal limit governs continuous leakage current handling-not transient suppression-and must be considered when sizing series impedance in high-temperature environments. The SA11-E3/73 remains fully functional within this boundary.
SA11-E3/73 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA11-E3/73 FAQ
1.How can I place an order for SA11-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11-E3/73 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 SA11-E3/73 reliable?
The price and inventory of SA11-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11-E3/73 is usually 5 days.
3.What payment methods are accepted for SA11-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11-E3/73?
SA11-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11-E3/73 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 SA11-E3/73?
For technical support, including SA11-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11-E3/73 requirements.
6.How does Aetrix verify that SA11-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA11-E3/73 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 SA11-E3/73 meets industry standards.
7.What is the process for return or replacement of SA11-E3/73?
All SA11-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA11-E3/73, 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 SA11-E3/73 part is unused and in its original packaging.
Return procedure for SA11-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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