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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SA11C-E3/73

Name: SA11C-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA11C-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA11C-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SA11C-E3/73.pdf

Description:: TVS DIODE 11VWM 20.1VC DO204AC

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Product details

Overview

SA11C-E3/73 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 11 V stand-off voltage (V_WM), 12.2–13.5 V breakdown voltage (V_BR) at 1 mA, 500 W peak pulse power (10/1000 µs), 27.5 A peak pulse current (I_PPM), and clamps to ≤18.2 V at rated I_PPM. It is used in automotive sensor interfaces and industrial I/O protection where bidirectional surge immunity is required.

For engineers reviewing the SA11C-E3/73 datasheet, SA11C-E3/73 pinout, SA11C-E3/73 application, or SA11C-E3/73 equivalent, this page delivers verified electrical parameters, polarity-agnostic terminal behavior, AEC-Q101 qualification status, and direct replacement guidance for bi-directional TVS selection in 12 V rail protection.

Technical Context

The SA11C-E3/73 operates as a symmetrical avalanche diode with identical forward and reverse breakdown characteristics, enabling bidirectional transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable V_BR tolerance (±5 %) and low incremental surge resistance, critical for consistent clamping under repetitive 10/1000 µs surges.

Rated for -55 °C to +175 °C junction temperature and qualified to AEC-Q101, it supports automotive under-hood and industrial control environments. The device exhibits 1.0 µA max reverse leakage at V_WM, 18.2 V max clamping voltage at 27.5 A, and 5 %/°C V_BR temperature coefficient - all confirmed for the SA11C variant in the SAxxC family.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	11 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 12 V nominal systems.
V_BR (min/max)	12.2 V / 13.5 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during ESD or load-dump events without premature triggering.
I_PPM	27.5 A - Peak surge current capability under 10/1000 µs waveform; determines minimum trace width and PCB layout robustness.
V_C	≤18.2 V - Clamped voltage at I_PPM; must stay below IC absolute maximum ratings to prevent downstream damage.
P_PPM	500 W - Peak pulse power rating; enables protection against IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source).
T_J max	+175 °C - Maximum junction temperature; supports operation in high-ambient environments like engine control units.
AEC-Q101	Qualified - Validated for automotive applications per stress test requirements including HTGB, HTRB, and TCT.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads, solderable per J-STD-002/JESD 22-B102. Bi-directional construction - no polarity marking; terminals are electrically symmetrical.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Transient conduction path	Either lead serves as input/output; no cathode band - enables blind-mounting in PCB layouts for bi-directional line protection.
Leads (both)	Thermal and mechanical interface	Supports 275 °C solder dip (10 s); lead length ≥0.375" (9.5 mm) required for rated PD = 3.0 W derating per Fig. 5.

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable V_BR over lifetime and humidity exposure; eliminates risk of parametric shift in humid industrial enclosures.
500 W peak pulse power (10/1000 µs)	Meets IEC 61000-4-5 surge immunity requirements for industrial fieldbus and automotive LIN/CAN physical layers.
AEC-Q101 qualification	Validates reliability for automotive body electronics, ADAS sensor modules, and powertrain sub-systems.
Low clamping ratio (V_C/V_BR ≈ 1.4)	Minimizes let-through energy during transients - critical for protecting 16 V-tolerant microcontrollers and analog front-ends.
RoHS-compliant (E3 suffix)	Meets Directive 2011/65/EU; matte tin plating passes JESD 201 Class 1A whisker testing for long-term solder joint integrity.

Applications

Automotive Sensor Interface	Industrial PLC Analog Input
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing ±100 V transients without polarity biasing. Use Value: Maintains signal integrity by limiting voltage excursion to ≤18.2 V, preventing latch-up or gate oxide rupture in 3.3 V/5 V sensor ASICs.	Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from induced surges due to relay switching or lightning coupling. IC Role / Device Role / Timing Role: Standoff protector across input terminals, conducting only during >12.2 V excursions while remaining high-impedance during normal operation. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding series impedance or signal distortion.
Consumer Appliance Motor Control	Telecom Power Supply Input
Use Scenario: Safeguarding microcontroller GPIOs and H-bridge drivers in washing machine or HVAC fan modules from inductive kickback. IC Role / Device Role / Timing Role: Fast-response shunt clamp across motor driver supply rails, activated within <1 ns to suppress 600 V spikes. Use Value: Eliminates need for external RC snubbers - reduces BOM count and board space while maintaining 11 V system compatibility.	Use Scenario: Secondary-side transient suppression on 12 V DC outputs of telecom AC/DC adapters exposed to conducted surges via mains or data lines. IC Role / Device Role / Timing Role: Final-stage overvoltage limiter before PoE-powered devices or optical transceivers. Use Value: Limits output overshoot to <18.2 V during adapter fault conditions, preserving 12 V-rated Ethernet PHYs and SFP+ modules.

Automotive Sensor Interface

Industrial PLC Analog Input

Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ISO 7637-2 pulses in vehicle ECUs.

IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing ±100 V transients without polarity biasing.

Use Value: Maintains signal integrity by limiting voltage excursion to ≤18.2 V, preventing latch-up or gate oxide rupture in 3.3 V/5 V sensor ASICs.

Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from induced surges due to relay switching or lightning coupling.

IC Role / Device Role / Timing Role: Standoff protector across input terminals, conducting only during >12.2 V excursions while remaining high-impedance during normal operation.

Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding series impedance or signal distortion.

Consumer Appliance Motor Control

Telecom Power Supply Input

Use Scenario: Safeguarding microcontroller GPIOs and H-bridge drivers in washing machine or HVAC fan modules from inductive kickback.

IC Role / Device Role / Timing Role: Fast-response shunt clamp across motor driver supply rails, activated within <1 ns to suppress 600 V spikes.

Use Value: Eliminates need for external RC snubbers - reduces BOM count and board space while maintaining 11 V system compatibility.

Use Scenario: Secondary-side transient suppression on 12 V DC outputs of telecom AC/DC adapters exposed to conducted surges via mains or data lines.

IC Role / Device Role / Timing Role: Final-stage overvoltage limiter before PoE-powered devices or optical transceivers.

Use Value: Limits output overshoot to <18.2 V during adapter fault conditions, preserving 12 V-rated Ethernet PHYs and SFP+ modules.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ11CA	Same V_WM (11 V), higher P_PPM (600 W), SMA package (smaller footprint, lower thermal mass).	Preferred for space-constrained designs; requires tighter layout for thermal relief due to smaller pad area.	Select SMBJ11CA when board area is limited and 600 W surge margin is needed beyond IEC 61000-4-5 Level 4.
1.5KE11CA	Same V_WM (11 V), higher P_PPM (1500 W), DO-201AD package (larger, higher thermal inertia).	Better suited for high-energy, infrequent surges (e.g., AC mains input); less responsive than SA11C-E3/73 for fast ESD.	Choose 1.5KE11CA for primary-side AC/DC input protection where energy absorption dominates speed requirements.

Compared with SMBJ11CA and 1.5KE11CA, the SA11C-E3/73 offers optimal balance of AEC-Q101 qualification, DO-15 manufacturability, and 500 W capability - making it preferred for automotive and industrial mid-tier surge protection where reliability, legacy assembly compatibility, and cost are jointly prioritized.

Availability

SA11C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and consumer appliance motor controls requiring stable component supply and AEC-Q101 assurance.

Supply support for SA11C-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, MOSFETs, and passive components with emphasis on reliability and automotive-grade validation.

The SAxxC series is engineered for bi-directional transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where symmetric clamping and AEC-Q101 compliance are mandatory.

FAQ

What is the polarity configuration of SA11C-E3/73?

The SA11C-E3/73 is a bi-directional TVS diode with symmetrical anode/cathode terminals - no color band or marking is present. Either lead may connect to the protected line or ground, enabling simplified layout and eliminating orientation errors during automated assembly. This design directly supports differential signal protection and AC-coupled interfaces.

Does SA11C-E3/73 meet AEC-Q101 requirements?

Yes, SA11C-E3/73 is explicitly AEC-Q101 qualified per Vishay documentation (Document Number 88378, Revision 18-Sep-12). It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), confirming suitability for automotive under-hood and chassis applications.

What is the maximum clamping voltage for SA11C-E3/73 at its rated peak pulse current?

The maximum clamping voltage (V_C) for SA11C-E3/73 is 18.2 V at 27.5 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform. This value is measured per Figure 7/9 in the datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.

How does the SA11C-E3/73 differ from the uni-directional SA11A-E3/73?

The SA11C-E3/73 is bi-directional with symmetrical breakdown in both polarities, while SA11A-E3/73 is uni-directional and marked with a cathode band. SA11C-E3/73 has identical V_BR (12.2–13.5 V) and V_C (18.2 V) specs but supports AC or floating-line protection without polarity constraints - unlike SA11A-E3/73, which conducts only in reverse bias.

What is the RoHS and whisker-test status of SA11C-E3/73?

The "E3" suffix confirms SA11C-E3/73 is RoHS-compliant per Directive 2011/65/EU and meets JESD 201 Class 1A whisker testing requirements. Its matte tin-plated leads ensure solder joint reliability over time and thermal cycling, critical for automotive and industrial deployments exceeding 15-year service life.

SA11C-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:: -

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:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

SA11C-E3/73 FAQ

1.How can I place an order for SA11C-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA11C-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 SA11C-E3/73 reliable?

The price and inventory of SA11C-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 SA11C-E3/73 is usually 5 days.

3.What payment methods are accepted for SA11C-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11C-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA11C-E3/73?

SA11C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA11C-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 SA11C-E3/73?

For technical support, including SA11C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11C-E3/73 requirements.

6.How does Aetrix verify that SA11C-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA11C-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 SA11C-E3/73 meets industry standards.

7.What is the process for return or replacement of SA11C-E3/73?

All SA11C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA11C-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 SA11C-E3/73 part is unused and in its original packaging.

Return procedure for SA11C-E3/73:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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