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

Vishay General Semiconductor - Diodes Division SA54C-E3/73

Name: SA54C-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA54C-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA54C-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA54C-E3/73.pdf

Description:: TVS DIODE 54VWM 96.3VC DO204AC

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Product details

Overview

SA54C-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 a 54 V stand-off voltage (V_WM), 60–66.3 V breakdown voltage (V_BR) at 1 mA, 500 W peak pulse power (10/1000 µs), 5.7 A peak pulse current (I_PPM), and clamps to ≤87.1 V at rated surge. It is used in automotive sensor interfaces and industrial I/O protection.

For engineers reviewing the SA54C-E3/73 datasheet, SA54C-E3/73 pinout, SA54C-E3/73 application, or SA54C-E3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical data, clamping behavior under 10/1000 µs surge, and direct alternatives with documented V_BR, V_C, and packaging differences.

Technical Context

The SA54C-E3/73 is a bi-directional silicon avalanche diode optimized for transient suppression in both polarities without polarity marking. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for protecting downstream ICs from ESD and inductive switching spikes.

It operates across –55 °C to +175 °C junction temperature, supports repetitive 0.01% duty cycle surges, and maintains stable clamping performance up to its 500 W PPPM rating. The device is RoHS-compliant (E3 suffix), meets JESD 201 Class 1A whisker resistance, and is qualified to AEC-Q101 for automotive use.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown.
V_BR (min/max)	60.0 / 66.3 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events.
V_C @ I_PPM	≤87.1 V at 5.7 A - Clamped voltage under full 10/1000 µs surge; determines maximum stress on protected circuitry.
P_PPM	500 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges.
I_PPM	5.7 A - Peak surge current supported at V_C; directly correlates with line impedance and surge source strength.
T_J max	+175 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments.
Package	DO-204AC (DO-15) - Standard axial-leaded through-hole package; compatible with legacy PCB layouts and wave-soldering processes.

Pinout & Package

SA54C-E3/73 uses a DO-204AC (DO-15) molded epoxy package with matte tin-plated leads. As a bi-directional TVS, it has no polarity marking and functions identically in either orientation. Leads are solderable per J-STD-002 and JESD 22-B102.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (unmarked)	Bi-directional avalanche junction	Both terminals serve as symmetrical clamping nodes; no cathode band; interchangeable in layout.
Lead 1	Terminal A	One end of the bi-directional junction; connects to line under protection (e.g., CAN_H or RS-485 A).
Lead 2	Terminal B	Opposite end of the bi-directional junction; connects to return path (e.g., ground or differential complement).

Key Features

Feature	Design Value
Glass-passivated chip junction	Enables <1 ns response time and stable long-term leakage performance under thermal cycling.
500 W peak pulse power (10/1000 µs)	Supports IEC 61000-4-5 4th-level surge immunity without derating in standard PCB layouts.
AEC-Q101 qualified	Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces.
Low incremental clamping resistance	Minimizes V_C – V_BR delta (≤27.1 V), reducing voltage overshoot during fast-rising transients.
RoHS-compliant E3 suffix	Meets JESD 201 Class 1A whisker resistance and UL 94 V-0 flammability for safety-critical assemblies.

Applications

Automotive Sensor Protection	Industrial RS-485 Interface
Use Scenario: Protecting ABS wheel speed sensors exposed to load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across sensor signal pair to shunt transients to chassis ground. Use Value: Limits induced spikes to ≤87.1 V, preventing damage to analog front-end amplifiers and ADC inputs in sensor signal conditioning circuits.	Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs subjected to motor drive noise and cable ESD. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on differential bus lines (A/B) to suppress common-mode and differential-mode surges. Use Value: Maintains signal integrity by clamping transients within 10/1000 µs window while preserving DC common-mode range up to ±12 V.
Consumer Power Adapter Input	Telecom DSL Line Card
Use Scenario: Secondary-side overvoltage protection on 5–24 V DC outputs of wall adapters prone to capacitor discharge transients. IC Role / Device Role / Timing Role: Bi-directional clamp between output rail and return, absorbing reverse-polarity connection energy and hot-swap spikes. Use Value: Withstands 70 A IFSM (uni-directional spec inherited from family) and limits output rail excursion to ≤87.1 V during fault conditions.	Use Scenario: Protecting ADSL/VDSL line drivers from lightning-induced surges on twisted-pair copper loops. IC Role / Device Role / Timing Role: Primary-stage TVS on line interface transformer secondary windings to divert surge energy before reaching PHY IC. Use Value: 500 W PPPM rating handles telecom-grade longitudinal surges; DO-15 footprint allows placement near transformer for minimal loop inductance.

Automotive Sensor Protection

Industrial RS-485 Interface

Use Scenario: Protecting ABS wheel speed sensors exposed to load dump and alternator ripple in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Bi-directional clamping element placed across sensor signal pair to shunt transients to chassis ground.

Use Value: Limits induced spikes to ≤87.1 V, preventing damage to analog front-end amplifiers and ADC inputs in sensor signal conditioning circuits.

Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs subjected to motor drive noise and cable ESD.

IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on differential bus lines (A/B) to suppress common-mode and differential-mode surges.

Use Value: Maintains signal integrity by clamping transients within 10/1000 µs window while preserving DC common-mode range up to ±12 V.

Consumer Power Adapter Input

Telecom DSL Line Card

Use Scenario: Secondary-side overvoltage protection on 5–24 V DC outputs of wall adapters prone to capacitor discharge transients.

IC Role / Device Role / Timing Role: Bi-directional clamp between output rail and return, absorbing reverse-polarity connection energy and hot-swap spikes.

Use Value: Withstands 70 A IFSM (uni-directional spec inherited from family) and limits output rail excursion to ≤87.1 V during fault conditions.

Use Scenario: Protecting ADSL/VDSL line drivers from lightning-induced surges on twisted-pair copper loops.

IC Role / Device Role / Timing Role: Primary-stage TVS on line interface transformer secondary windings to divert surge energy before reaching PHY IC.

Use Value: 500 W PPPM rating handles telecom-grade longitudinal surges; DO-15 footprint allows placement near transformer for minimal loop inductance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ54CA	Same V_WM (54 V), lower PPPM (400 W), SMA package (surface-mount)	Requires PCB rework for SMT layout; unsuitable for through-hole production or high-reliability vibration environments.	Select when board space is constrained and automated assembly is prioritized over mechanical robustness.
P6KE54CA	Same V_WM (54 V), identical DO-204AC package, but higher V_C (93.6 V) and lower I_PPM (5.3 A)	Less effective clamping margin; may allow higher residual voltage into protected ICs during worst-case surges.	Choose only if cost sensitivity outweighs clamping performance; verify system-level immunity with V_C = 93.6 V.

Compared with SMAJ54CA and P6KE54CA, SA54C-E3/73 offers superior clamping (87.1 V vs. 93.6 V), higher surge current headroom (5.7 A vs. 5.3 A), and AEC-Q101 qualification-making it the preferred choice for automotive and industrial designs demanding validated reliability and tighter voltage limiting.

Availability

SA54C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer power adapter outputs, and telecom DSL line cards requiring stable component supply and long-lifecycle support.

Supply support for SA54C-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 protection devices with emphasis on reliability and automotive-grade qualification.

The SAxxC series is part of Vishay's TRANSZORB® TVS family, engineered specifically for bi-directional transient suppression in harsh environments where polarity-agnostic clamping and AEC-Q101 compliance are mandatory.

FAQ

What is the breakdown voltage range of SA54C-E3/73?

The SA54C-E3/73 has a minimum breakdown voltage (V_BR) of 60.0 V and a maximum of 66.3 V at 1 mA test current, as specified in the Vishay datasheet document 88378. This range ensures consistent avalanche turn-on behavior across production lots and temperature extremes, enabling reliable overvoltage protection in bi-directional signal paths. The SA54C-E3/73 must be selected based on this confirmed V_BR window-not generic "54 V" labeling-to avoid misapplication in margin-critical designs.

Is SA54C-E3/73 RoHS-compliant and lead-free?

Yes, SA54C-E3/73 is RoHS-compliant and lead-free, indicated by the "E3" suffix per Vishay's ordering nomenclature. It meets JESD 201 Class 1A whisker resistance requirements and complies with Directive 2011/65/EU. The matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, supporting both wave and selective soldering processes without contamination risk. This makes SA54C-E3/73 suitable for commercial and automotive production where material compliance is audited.

Does SA54C-E3/73 have AEC-Q101 qualification?

Yes, SA54C-E3/73 carries AEC-Q101 qualification, confirmed in Vishay's documentation (note "(1) AEC-Q101 qualified" on page 3 of document 88378). This certification validates its suitability for automotive applications including powertrain, chassis, and body electronics. Unlike non-qualified variants (e.g., base E3 parts), SA54C-E3/73 underwent stress testing for temperature cycling, humidity bias, and mechanical shock-ensuring reliability in vehicle environments where SA54C-E3/73 is deployed.

What is the clamping voltage of SA54C-E3/73 at its rated surge current?

The SA54C-E3/73 clamps to a maximum of 87.1 V at its rated peak pulse current (I_PPM) of 5.7 A under the standard 10/1000 µs waveform. This value is measured across the device terminals during surge testing and defines the upper voltage limit imposed on protected circuitry. Designers use this V_C to verify that downstream components-such as RS-485 transceivers or microcontroller I/O pins-remain within absolute maximum ratings during transient events. The SA54C-E3/73 achieves this clamping with low incremental resistance, minimizing overshoot.

Can SA54C-E3/73 replace uni-directional TVS diodes like SA54A-E3/73?

No, SA54C-E3/73 cannot directly replace uni-directional types such as SA54A-E3/73 because it lacks polarity marking and conducts in both directions, whereas SA54A-E3/73 has a defined cathode band and blocks reverse current until breakdown. Using SA54C-E3/73 in a uni-directional circuit (e.g., DC power rail to ground) may cause unintended conduction or increased leakage. The "C" suffix explicitly denotes bi-directional functionality, and substitution requires verifying circuit topology, grounding scheme, and transient directionality-SA54C-E3/73 is intended for AC-coupled or differential signal lines, not unidirectional DC rails.

SA54C-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):: 54V

Voltage - Breakdown (Min):: 60V

Voltage - Clamping (Max) @ Ipp:: 96.3V

Current - Peak Pulse (10/1000µs):: 5.2A

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)

SA54C-E3/73 FAQ

1.How can I place an order for SA54C-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA54C-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 SA54C-E3/73 reliable?

The price and inventory of SA54C-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 SA54C-E3/73 is usually 5 days.

3.What payment methods are accepted for SA54C-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA54C-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA54C-E3/73?

SA54C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA54C-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 SA54C-E3/73?

For technical support, including SA54C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA54C-E3/73 requirements.

6.How does Aetrix verify that SA54C-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA54C-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 SA54C-E3/73 meets industry standards.

7.What is the process for return or replacement of SA54C-E3/73?

All SA54C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA54C-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 SA54C-E3/73 part is unused and in its original packaging.

Return procedure for SA54C-E3/73:

1.Submit a request within 90 days.

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

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