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

Vishay General Semiconductor - Diodes Division SA11HE3/54

Name: SA11HE3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA11HE3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA11HE3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA11HE3/54.pdf

Description:: TVS DIODE 11VWM 20.1VC DO204AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SA11HE3/54 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 a 11 V stand-off voltage (V_WM), 12.2–13.5 V breakdown voltage (V_BR) at 1 mA, 18.2 V maximum clamping voltage (V_C) at 27.5 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.

For engineers reviewing the SA11HE3/54 datasheet, SA11HE3/54 pinout, SA11HE3/54 application, or SA11HE3/54 equivalent, this part is selected for robust transient suppression in 12 V automotive subsystems, industrial sensor interfaces, and DC power input stages where low clamping voltage, fast response (<1 ns), and high surge reliability are required.

Technical Context

The SA11HE3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling stable reverse-biased clamping behavior under transient stress. Its uni-directional polarity requires cathode marking (band end), and it delivers consistent clamping performance across -55 °C to +175 °C junction temperature range.

It is rated for 70 A non-repetitive forward surge current (I_FSM, 10 ms half-sine), exhibits 1.0 µA max reverse leakage at V_WM, and maintains low incremental surge resistance - critical for limiting voltage overshoot during ESD or load-dump events in automotive ECUs and power converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	11 V - Maximum continuous reverse operating voltage before clamping initiates; sets safe margin below 12 V nominal rail.
V_BR (min/max)	12.2 V / 13.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on without premature conduction.
V_C @ I_PPM	18.2 V at 27.5 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels.
P_PPM	500 W - Peak pulse power handling capability; supports common ISO 7637-2 Pulse 1/2/5a transient profiles.
I_FSM	70 A - Surge current rating for 10 ms half-sine waveform; withstands automotive load dump surges.
T_J max	+175 °C - Maximum junction temperature; enables operation in under-hood automotive environments.
AEC-Q101	Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified (HE3 suffix). Cathode indicated by color band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse voltage reference	Connected to lower-potential side (e.g., ground or return path); defines clamping directionality.
Cathode (banded end)	Clamping output / Surge sink node	Connected to protected line (e.g., 12 V rail); conducts transient energy to anode during overvoltage.

Key Features

Feature	Design Value
Glass passivated chip junction	Ensures long-term stability of V_BR and leakage under thermal cycling and humidity stress.
500 W peak pulse power (10/1000 µs)	Supports automotive load-dump and inductive switching transients without degradation.
AEC-Q101 qualification	Validated for automotive electronics per stress test requirements including HTGB, AC/DC life test, and ESD.
Low clamping ratio (V_C/V_BR ≈ 1.43)	Minimizes voltage overshoot on protected lines - critical for 12 V systems with 16 V absolute max ratings.
Matte tin plating, J-STD-002 compliant	Enables reliable solder wetting and intermetallic formation in automated PCB assembly.

Applications

Automotive Body Control Module (BCM)	Industrial PLC Digital Input Protection
Use Scenario: Protecting 12 V supply inputs of BCM microcontrollers and CAN transceivers against ISO 7637-2 load-dump pulses and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed at board-level power entry point, shunting surge current to ground before reaching LDOs and logic ICs. Use Value: Limits transient voltage to ≤18.2 V, preventing latch-up or gate oxide damage in 20 V-rated power management ICs.	Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Front-end TVS on optocoupler input stage, absorbing 500 W transients while maintaining <1 µA leakage at 24 V nominal. Use Value: Enables >100,000 surge cycles without parameter shift, reducing field failure rates in factory automation equipment.
Automotive Infotainment Power Rail	DC-DC Converter Input Stage
Use Scenario: Clamping 12 V battery-supplied power to infotainment head units exposed to cranking dips and jump-start spikes. IC Role / Device Role / Timing Role: Uni-directional TVS placed between fuse and main buck converter input capacitor, conducting only during positive overvoltage events. Use Value: Achieves sub-1 ns response time, capturing fast-edge transients before they propagate into noise-sensitive audio and RF sections.	Use Scenario: Protecting input MOSFETs and controller ICs in 48 V–12 V buck converters used in ADAS camera modules. IC Role / Device Role / Timing Role: Secondary clamping element after bulk input capacitor, suppressing residual ringing and EFT bursts above 11 V threshold. Use Value: Maintains 1.0 µA max reverse leakage at 11 V, avoiding unnecessary quiescent current drain in always-on subsystems.

Automotive Body Control Module (BCM)

Industrial PLC Digital Input Protection

Use Scenario: Protecting 12 V supply inputs of BCM microcontrollers and CAN transceivers against ISO 7637-2 load-dump pulses and alternator ripple.

IC Role / Device Role / Timing Role: Primary clamping device placed at board-level power entry point, shunting surge current to ground before reaching LDOs and logic ICs.

Use Value: Limits transient voltage to ≤18.2 V, preventing latch-up or gate oxide damage in 20 V-rated power management ICs.

Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers from field-wiring induced surges and relay coil flyback.

IC Role / Device Role / Timing Role: Front-end TVS on optocoupler input stage, absorbing 500 W transients while maintaining <1 µA leakage at 24 V nominal.

Use Value: Enables >100,000 surge cycles without parameter shift, reducing field failure rates in factory automation equipment.

Automotive Infotainment Power Rail

DC-DC Converter Input Stage

Use Scenario: Clamping 12 V battery-supplied power to infotainment head units exposed to cranking dips and jump-start spikes.

IC Role / Device Role / Timing Role: Uni-directional TVS placed between fuse and main buck converter input capacitor, conducting only during positive overvoltage events.

Use Value: Achieves sub-1 ns response time, capturing fast-edge transients before they propagate into noise-sensitive audio and RF sections.

Use Scenario: Protecting input MOSFETs and controller ICs in 48 V–12 V buck converters used in ADAS camera modules.

IC Role / Device Role / Timing Role: Secondary clamping element after bulk input capacitor, suppressing residual ringing and EFT bursts above 11 V threshold.

Use Value: Maintains 1.0 µA max reverse leakage at 11 V, avoiding unnecessary quiescent current drain in always-on subsystems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ11A-E3/52	Same V_WM (11 V), identical DO-214AC package, but lower P_PPM (400 W) and higher V_C (18.2 V → 19.0 V).	Less suitable for ISO 7637-2 Pulse 5a (load dump); better for space-constrained PCBs due to SMD footprint.	Select SMAJ11A-E3/52 only when board area is critical and surge energy is limited to ≤400 W.
1.5KE11A	Higher P_PPM (1500 W), larger DO-201AD package, same V_WM/V_BR range, but not AEC-Q101 qualified.	Used in industrial power supplies where automotive qualification is unnecessary and higher surge margin is needed.	Choose 1.5KE11A for non-automotive 12 V systems requiring >500 W surge headroom and no qualification constraints.

Compared with SMAJ11A-E3/52 and 1.5KE11A, the SA11HE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole reliability, and precise 18.2 V clamping - making it optimal for cost-sensitive, high-volume automotive modules where qualification and thermal robustness are mandatory.

Availability

SA11HE3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and DC power input protection requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for SA11HE3/54 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 qualification rigor.

The SAxxA series is engineered specifically for automotive and industrial transient voltage suppression, delivering standardized 500 W surge capability, AEC-Q101 compliance, and tight parametric control across temperature and life cycle.

FAQ

What is the clamping voltage of the SA11HE3/54 under a 10/1000 µs surge?

The SA11HE3/54 has a maximum clamping voltage (V_C) of 18.2 V at 27.5 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuitry sees no more than 18.2 V during defined surge events - critical for safeguarding 20 V-rated downstream components in 12 V systems. The SA11HE3/54 achieves this with low dynamic impedance and stable avalanche characteristics.

Is the SA11HE3/54 suitable for automotive applications?

Yes, the SA11HE3/54 is AEC-Q101 qualified and explicitly designed for automotive use. Its HE3 suffix denotes AEC-Q101 qualification, and its parameters - including 175 °C max junction temperature, 70 A I_FSM, and 500 W P_PPM - meet ISO 7637-2 Pulse 1, 2a, 3a/b, and 5a requirements. The SA11HE3/54 is deployed in body control modules, infotainment power rails, and sensor interface protection where qualification and thermal resilience are mandatory.

What does the "HE3" suffix mean in SA11HE3/54?

The "HE3" suffix in SA11HE3/54 indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes the part from commercial-grade "E3" variants (e.g., SA11A-E3/54), confirming enhanced reliability testing for automotive environments. The SA11HE3/54 also features matte tin-plated leads compliant with J-STD-002 and meets UL 94 V-0 flammability standards - all verified per Vishay Document Number 88378.

How does the SA11HE3/54 differ from bi-directional TVS diodes like SA11CA?

The SA11HE3/54 is uni-directional, meaning it clamps only positive overvoltages relative to its cathode (banded end), while SA11CA is bi-directional and protects against both polarities. Uni-directional operation gives the SA11HE3/54 lower leakage (<1.0 µA at 11 V) and tighter V_BR tolerance - ideal for DC power rail protection. In contrast, SA11CA is used for AC-coupled or floating signal lines. The SA11HE3/54's polarity must be observed during placement to avoid forward conduction.

What is the maximum operating temperature for the SA11HE3/54?

The SA11HE3/54 has a specified operating junction temperature range of -55 °C to +175 °C. This wide range supports deployment in under-hood automotive locations, industrial motor drives, and outdoor power electronics. Derating curves in the datasheet (Fig. 2 and Fig. 5) define allowable power dissipation and peak pulse capability above 25 °C ambient. At +125 °C case temperature, the SA11HE3/54 retains >60 % of its 500 W P_PPM rating - a key advantage over non-automotive TVS diodes.

SA11HE3/54 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:: 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)

SA11HE3/54 FAQ

1.How can I place an order for SA11HE3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA11HE3/54 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 SA11HE3/54 reliable?

The price and inventory of SA11HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11HE3/54 is usually 5 days.

3.What payment methods are accepted for SA11HE3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11HE3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA11HE3/54?

SA11HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA11HE3/54 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 SA11HE3/54?

For technical support, including SA11HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11HE3/54 requirements.

6.How does Aetrix verify that SA11HE3/54 is sourced from the original manufacturer or authorized distributors?

All SA11HE3/54 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 SA11HE3/54 meets industry standards.

7.What is the process for return or replacement of SA11HE3/54?

All SA11HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA11HE3/54, 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 SA11HE3/54 part is unused and in its original packaging.

Return procedure for SA11HE3/54:

1.Submit a request within 90 days.

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

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