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

Vishay General Semiconductor - Diodes Division SA11A-E3/54

Name: SA11A-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA11A-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA11A-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA11A-E3/54.pdf

Description:: TVS DIODE 11VWM 18.2VC DO204AC

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Product details

Overview

SA11A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for overvoltage protection of sensitive electronics. It features a 11 V stand-off voltage (V_WM), 12.2–13.5 V breakdown voltage (V_BR) at 1.0 mA, 18.2 V clamping voltage (V_C) at 27.5 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in industrial sensor interfaces.

For engineers reviewing the SA11A-E3/54 datasheet, SA11A-E3/54 pinout, SA11A-E3/54 application, or SA11A-E3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal mapping, AEC-Q101 qualification status, thermal derating curves, and direct alternatives for automotive-grade transient suppression design.

Technical Context

The SA11A-E3/54 operates as a unidirectional avalanche diode, clamping transients above its breakdown threshold while maintaining low leakage (<1.0 μA at 11 V) below V_WM. Its glass-passivated junction ensures stable V_BR tolerance (±5%) and fast response time (<1.0 ns), enabling protection against ESD, lightning-induced surges, and inductive switching spikes.

Thermal performance is defined by a 175 °C maximum junction temperature and 3.0 W steady-state power dissipation at 75 °C lead temperature. The device is rated for 70 A non-repetitive forward surge current (10 ms half-sine) and exhibits a +11 mV/°C temperature coefficient of V_BR, supporting predictable behavior across automotive and industrial ambient ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	11 V - Maximum continuous reverse operating voltage before clamping begins
V_BR (min/max)	12.2 V / 13.5 V at 1.0 mA - Ensures reliable turn-on within tight tolerance for precise overvoltage thresholding
V_C @ I_PPM	18.2 V at 27.5 A - Limits downstream voltage stress during 500 W transient events
I_PPM	27.5 A (10/1000 μs) - Peak surge current handling capacity under standardized surge waveform
P_PPM	500 W - Sustains high-energy transients without failure, critical for industrial motor drive I/O protection
T_J max.	175 °C - Enables operation in under-hood automotive and high-temperature industrial enclosures
AEC-Q101	Qualified - Validated for automotive electronic systems per stress test requirements

Pinout & Package

Package: DO-15 (DO-204AC), axial-leaded, epoxy-molded case with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction path	Connected to lower-potential side (e.g., ground or return line) in unidirectional TVS configuration
Cathode	Clamping node	Connected to protected line (e.g., 12 V rail or sensor output); color band identifies this terminal

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable V_BR and long-term reliability under thermal cycling and humidity exposure
500 W peak pulse power (10/1000 μs)	Protects against high-energy transients common in 12 V automotive power distribution and industrial PLC backplanes
AEC-Q101 qualification	Validates robustness for automotive body control modules, infotainment power supplies, and ADAS sensor interfaces
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients, improving clamping precision for CMOS-level ICs
RoHS-compliant E3 suffix	Meets JESD 201 Class 1A whisker resistance, suitable for high-reliability automated assembly

Applications

Automotive Body Control Module (BCM)	Industrial Sensor Signal Conditioning
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in vehicle BCMs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between LIN line and ground, absorbing negative-going transients and limiting positive excursions to ≤18.2 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic inputs during ISO 7637-2 Pulse 1/2a/5a events.	Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loop drivers) in factory-floor pressure/temperature sensors from EFT and surge coupling. IC Role / Device Role / Timing Role: Standoff-connected TVS on output line, conducting only during >12.2 V transients while remaining high-impedance during normal operation. Use Value: Maintains signal integrity with <1.0 μA leakage at 11 V, avoiding offset errors in precision current sources.
Telecom Power Supply Input	Consumer Appliance Motor Drive Interface
Use Scenario: Safeguarding primary-side controller ICs and MOSFET gates in AC/DC adapters subjected to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Primary-side TVS connected across bulk capacitor terminals, clamping line-to-line transients before they reach switching controller. Use Value: Withstands 70 A single-half-sine surge (10 ms), meeting IEC 61000-4-5 Level 3 immunity requirements.	Use Scenario: Protecting gate drivers and MCU GPIOs in smart washing machine motor control boards exposed to inductive kickback from BLDC phase switching. IC Role / Device Role / Timing Role: Localized TVS on each half-bridge gate drive trace, suppressing dV/dt spikes before reaching driver IC inputs. Use Value: Fast <1 ns response ensures clamping initiates before gate oxide breakdown occurs in 3.3 V logic-level drivers.

Automotive Body Control Module (BCM)

Industrial Sensor Signal Conditioning

Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in vehicle BCMs.

IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between LIN line and ground, absorbing negative-going transients and limiting positive excursions to ≤18.2 V.

Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic inputs during ISO 7637-2 Pulse 1/2a/5a events.

Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loop drivers) in factory-floor pressure/temperature sensors from EFT and surge coupling.

IC Role / Device Role / Timing Role: Standoff-connected TVS on output line, conducting only during >12.2 V transients while remaining high-impedance during normal operation.

Use Value: Maintains signal integrity with <1.0 μA leakage at 11 V, avoiding offset errors in precision current sources.

Telecom Power Supply Input

Consumer Appliance Motor Drive Interface

Use Scenario: Safeguarding primary-side controller ICs and MOSFET gates in AC/DC adapters subjected to lightning-induced surges on mains input.

IC Role / Device Role / Timing Role: Primary-side TVS connected across bulk capacitor terminals, clamping line-to-line transients before they reach switching controller.

Use Value: Withstands 70 A single-half-sine surge (10 ms), meeting IEC 61000-4-5 Level 3 immunity requirements.

Use Scenario: Protecting gate drivers and MCU GPIOs in smart washing machine motor control boards exposed to inductive kickback from BLDC phase switching.

IC Role / Device Role / Timing Role: Localized TVS on each half-bridge gate drive trace, suppressing dV/dt spikes before reaching driver IC inputs.

Use Value: Fast <1 ns response ensures clamping initiates before gate oxide breakdown occurs in 3.3 V logic-level drivers.

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-E3/5T	Same V_WM (11 V), but SMA package (surface-mount), lower P_PPM (400 W), higher V_C (19.0 V)	Preferred for space-constrained PCBs where reflow compatibility and footprint reduction outweigh peak power margin	Select when board area is limited and surge energy is ≤400 W; verify thermal relief for SMA pad layout
1.5KE11A	Higher P_PPM (1500 W), DO-201 package, same V_WM/V_BR range, but larger footprint and higher V_C (18.2 V → 19.9 V)	Used in legacy industrial power supplies requiring higher surge margin and through-hole mechanical robustness	Choose for legacy designs needing ≥1 kW surge headroom or where DO-201 mounting is mandated

Compared with SMAJ11A-E3/5T and 1.5KE11A, the SA11A-E3/54 offers optimal balance of 500 W surge capability, DO-15 mechanical stability, AEC-Q101 qualification, and low-clamp performance - making it ideal for new automotive and industrial designs requiring validated reliability without over-engineering.

Availability

SA11A-E3/54 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, telecom power supply inputs, and consumer appliance motor drive interfaces requiring stable component supply and AEC-Q101 compliance.

Supply support for SA11A-E3/54 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, efficiency, and application-specific validation.

The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in automotive, industrial, and telecom infrastructure where repeatable clamping performance and AEC-Q101 qualification are mandatory.

FAQ

What is the clamping voltage of SA11A-E3/54 and how does it protect downstream components?

The SA11A-E3/54 has a maximum clamping voltage (V_C) of 18.2 V at 27.5 A peak pulse current (10/1000 μs). This means that during a transient event, the device limits the voltage seen by downstream ICs or MOSFETs to ≤18.2 V - well below typical 24 V system absolute maximum ratings. Its low incremental clamping resistance ensures minimal overshoot, preserving logic-level integrity in 12 V automotive and industrial circuits.

Is SA11A-E3/54 suitable for automotive applications, and what qualification does it hold?

Yes, SA11A-E3/54 is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including body control modules, infotainment power supplies, and sensor interfaces. The E3 suffix indicates RoHS compliance and JESD 201 Class 1A whisker resistance - essential for high-reliability automotive manufacturing and long-term under-hood operation up to 175 °C junction temperature.

How does the SA11A-E3/54 differ from bidirectional TVS diodes like SA11CA?

The SA11A-E3/54 is unidirectional and functions like a standard Zener-based TVS with cathode marking, conducting only in reverse breakdown and forward surge. In contrast, SA11CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. SA11A-E3/54 is used where polarity is known (e.g., DC power rails), offering tighter V_BR tolerance and lower leakage than its bidirectional counterpart.

What is the maximum steady-state power dissipation for SA11A-E3/54, and how is it thermally managed?

The SA11A-E3/54 has a steady-state power dissipation (P_D) of 3.0 W at 75 °C lead temperature, derating linearly to zero at 175 °C junction temperature. Thermal management relies on adequate PCB copper area connected to its axial leads, with recommended minimum 0.375" (9.5 mm) lead length for heatsinking. No external heatsink is required for typical transient-only duty cycles.

Can SA11A-E3/54 be used in place of older 1N6267A or P6KE11A devices?

SA11A-E3/54 is a direct functional replacement for 1N6267A (same V_WM/V_BR/V_C specs) and closely matches P6KE11A in electrical performance, though P6KE11A uses DO-15 but lacks AEC-Q101 qualification. SA11A-E3/54 improves upon both with tighter V_BR tolerance (±5% vs ±10%), lower leakage, and automotive-grade validation - making it preferred for new designs demanding higher reliability.

SA11A-E3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

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

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 11V

Voltage - Breakdown (Min):: 12.2V

Voltage - Clamping (Max) @ Ipp:: 18.2V

Current - Peak Pulse (10/1000µs):: 27.5A

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)

SA11A-E3/54 FAQ

1.How can I place an order for SA11A-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA11A-E3/54 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 SA11A-E3/54 reliable?

The price and inventory of SA11A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11A-E3/54 is usually 5 days.

3.What payment methods are accepted for SA11A-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11A-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA11A-E3/54?

SA11A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA11A-E3/54 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 SA11A-E3/54?

For technical support, including SA11A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11A-E3/54 requirements.

6.How does Aetrix verify that SA11A-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA11A-E3/54 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 SA11A-E3/54 meets industry standards.

7.What is the process for return or replacement of SA11A-E3/54?

All SA11A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA11A-E3/54, 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 SA11A-E3/54 part is unused and in its original packaging.

Return procedure for SA11A-E3/54:

1.Submit a request within 90 days.

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

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