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Vishay General Semiconductor - Diodes Division SA11CHE3/73
- Part No.:
- SA11CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11CHE3/73.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
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Product details
Overview
SA11CHE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 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), 27.5 A peak pulse current (IPPM), and clamps to ≤18.2 V at rated IPPM - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SA11CHE3/73 datasheet, SA11CHE3/73 pinout, SA11CHE3/73 application, or SA11CHE3/73 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, DO-15 mechanical compatibility, 175 °C max junction temperature, and low incremental clamping voltage under transient stress.
Technical Context
This TVS diode operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions due to its bi-directional construction. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the 10/1000 μs waveform rating reflects standardized surge immunity testing per REA definitions.
The device complies with AEC-Q101 stress test requirements for automotive applications and supports soldering per J-STD-002 and JESD 22-B102. Its thermal derating curve allows operation up to 175 °C junction temperature, with steady-state power dissipation limited to 3.0 W on an infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse voltage before clamping begins; defines operating margin for protected circuitry |
| VBR (min/max) | 12.2 V / 13.5 V at IT = 1.0 mA - precise breakdown threshold ensuring predictable turn-on during overvoltage events |
| IPPM | 27.5 A - peak surge current it can safely divert without failure under 10/1000 μs waveform |
| VC | ≤18.2 V at IPPM - clamped voltage seen by downstream components, limiting stress on ICs or MOSFETs |
| PPPM | 500 W - transient energy absorption capacity, critical for lightning or ESD event handling |
| TJ max | +175 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with UL 94 V-0 molded epoxy housing |
Pinout & Package
SA11CHE3/73 is housed in a DO-204AC (DO-15) package with two unmarked axial leads - typical of bi-directional TVS diodes where polarity is non-applicable. The device has no cathode marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Either terminal serves as input/output for surge current; no polarity dependency in layout or placement |
| Lead 1 / Lead 2 | Connection to protected line and ground reference | Placed across sensitive node (e.g., CAN bus pair or sensor supply) to shunt excess energy to common return |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JEDEC standards |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature, critical for long-life systems |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) when properly mounted with low-inductance layout |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients, protecting 12 V logic interfaces and analog front-ends |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical deployments |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional TVS placed across sensor supply and ground to clamp ±100 V transients within 1 ns response time. Use Value: Prevents latch-up or permanent damage to Hall-effect or magnetoresistive sensing ICs operating at 5–12 V rails. | Use Scenario: Shielding PLC digital input modules from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Connected between 24 V DC input line and common return to suppress inductive kickback from solenoid valves and contactors. Use Value: Enables reliable operation without external series impedance or filtering, reducing BOM count and board space. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceivers in building management systems exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Installed differentially across A/B bus lines to limit differential-mode transients to <20 V peak. Use Value: Maintains signal integrity and prevents transceiver latch-up during 1 kV/0.5 μs fast-rising surges per IEC 61000-4-4. | Use Scenario: Suppressing commutation spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb back-EMF energy during PWM switching transitions. Use Value: Eliminates need for snubber RC networks, lowering cost and improving efficiency in Class B EMI-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CA | Same VWM (11 V), same DO-214AC package, lower PPPM (400 W), higher VC (18.2 V vs. 18.2 V - matched), RoHS-compliant but not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select SMAJ11CA only if AEC-Q101 compliance is not required and PCB space constraints favor SMD mounting |
| P6KE11CA | Same VWM (11 V), larger DO-15 package (same footprint), identical 500 W rating, higher VC (19.5 V), AEC-Q101 not claimed | Higher clamping voltage reduces protection margin for 12 V logic; legacy through-hole alternative | Choose P6KE11CA only for backward compatibility in existing DO-15 layouts where SA11CHE3/73's tighter VC spec is not critical |
Compared with SMAJ11CA and P6KE11CA, SA11CHE3/73 delivers identical clamping performance with certified automotive reliability, enabling single-source qualification for Tier 1 suppliers requiring AEC-Q101 traceability and JESD 201 Class 2 whisker resistance.
Availability
SA11CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, and telecom line interface applications requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SA11CHE3/73 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 protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SAxxCHE3/73 series belongs to Vishay's TRANSZORB® family of TVS diodes, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 compliance and stable clamping performance are mandatory.
FAQ
What is the breakdown voltage range for SA11CHE3/73?
The SA11CHE3/73 has a minimum breakdown voltage (VBR) of 12.2 V and a maximum of 13.5 V at a test current of 1.0 mA. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable design margins for 12 V system protection.
Is SA11CHE3/73 suitable for automotive applications?
Yes, SA11CHE3/73 carries the HE3 suffix indicating AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It is explicitly rated for automotive use, including under-hood environments with operating junction temperatures up to +175 °C.
Does SA11CHE3/73 have polarity markings?
No, SA11CHE3/73 is a bi-directional TVS diode and carries no polarity marking. Both leads are functionally identical, allowing flexible placement across protected nodes without orientation concerns - unlike uni-directional variants such as SA11A.
What is the clamping voltage of SA11CHE3/73 at maximum rated surge current?
At its rated peak pulse current (IPPM) of 27.5 A (10/1000 μs waveform), SA11CHE3/73 clamps to a maximum of 18.2 V. This value is guaranteed per datasheet Fig. 7 and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SA11CHE3/73 replace SA11A in a design?
No - SA11CHE3/73 is bi-directional while SA11A is uni-directional. Substituting them requires verifying circuit topology: SA11A includes a cathode band and conducts only in reverse bias, whereas SA11CHE3/73 clamps symmetrically and must be used where bidirectional surge paths exist, such as across differential buses or AC-coupled lines.
SA11CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- 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)
SA11CHE3/73 FAQ
1.How can I place an order for SA11CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11CHE3/73 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 SA11CHE3/73 reliable?
The price and inventory of SA11CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA11CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11CHE3/73?
SA11CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11CHE3/73 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 SA11CHE3/73?
For technical support, including SA11CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11CHE3/73 requirements.
6.How does Aetrix verify that SA11CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA11CHE3/73 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 SA11CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA11CHE3/73?
All SA11CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA11CHE3/73, 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 SA11CHE3/73 part is unused and in its original packaging.
Return procedure for SA11CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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