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

Vishay General Semiconductor - Diodes Division SA54C-E3/54

Name: SA54C-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA54C-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA54C-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA54C-E3/54.pdf

Description:: TVS DIODE 54VWM 96.3VC DO204AC

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Product details

Overview

SA54C-E3/54 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), 60.0–66.3 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-E3/54 datasheet, SA54C-E3/54 pinout, SA54C-E3/54 application, or SA54C-E3/54 equivalent, this page delivers verified electrical parameters, bi-directional TVS behavior, DO-15 mechanical data, AEC-Q101 qualification status, and direct alternatives for ESD/surge protection design-in.

Technical Context

The SA54C-E3/54 operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, enabling transient suppression on AC-coupled or floating lines without polarity concerns. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at V_WM), while its 175 °C max junction temperature supports under-hood and high-temperature industrial use.

It complies with the 10/1000 µs surge waveform standard per REA, delivering 500 W peak pulse power at T_A = 25 °C with 0.01 % duty cycle. Clamping voltage rises incrementally with surge current - e.g., 87.1 V at 5.7 A - and exhibits a +0.065 %/°C V_BR temperature coefficient, critical for thermal stability in wide-temperature deployments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	54 V - maximum continuous reverse operating voltage before clamping begins
V_BR (min/max)	60.0 V / 66.3 V at I_T = 1 mA - defines reliable avalanche onset window for design margining
I_PPM	5.7 A - peak surge current it safely clamps under 10/1000 µs waveform
V_C	≤87.1 V at I_PPM - maximum clamped voltage seen by protected circuit during worst-case surge
P_PPM	500 W - peak transient energy handling capacity, defining robustness against lightning/inductive spikes
T_J max	175 °C - enables operation in engine control units, motor drives, and industrial enclosures
Leakage (I_D)	≤1.0 µA at V_WM - negligible standby power loss and no signal distortion in high-impedance lines

Pinout & Package

SA54C-E3/54 is housed in a DO-204AC (DO-15) molded epoxy package with matte tin-plated leads. Bi-directional construction means no polarity marking; both terminals are functionally identical and interchangeable.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Transient conduction path	Either terminal conducts during overvoltage in either polarity - no orientation required during placement
Case (body)	Non-electrical mechanical interface	DO-15 body provides UL 94 V-0 flammability rating and mechanical strain relief for lead bending

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable, repeatable breakdown voltage and long-term reliability under repeated surge stress
500 W peak pulse power (10/1000 µs)	Withstands automotive load-dump and industrial switching surges without degradation
AEC-Q101 qualified (HE3 variant; E3 is commercial grade)	Validated for automotive electronics per stress test requirements - E3 meets RoHS and JESD201 Class 1A whisker resistance
Low clamping ratio (V_C/V_BR ≈ 1.38)	Minimizes overvoltage exposure to downstream ICs - critical for 3.3 V/5 V logic protection
DO-204AC (DO-15) package	Industry-standard through-hole footprint compatible with legacy PCB tooling and automated insertion

Applications

Automotive Sensor Interface	Industrial PLC Analog Input
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from ISO 7637-2 pulses and ESD. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across differential or single-ended signal lines upstream of protection ICs. Use Value: Limits transient voltage to ≤87.1 V, preventing latch-up or gate oxide damage in 5 V-tolerant receivers.	Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring surges. IC Role / Device Role / Timing Role: Primary surge shunt device mounted at connector entry point, preceding precision op-amps and ADCs. Use Value: Absorbs up to 500 W of transient energy without failure, preserving measurement accuracy and system uptime.
Telecom Line Card Protection	Consumer Appliance Motor Control
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and POTS interface ICs from lightning-induced surges on external ports. IC Role / Device Role / Timing Role: First-line bi-directional TVS on unshielded twisted-pair or coaxial input traces. Use Value: Responds in <1 ns to clamp fast-rising transients, reducing need for secondary MOV or GDT stages.	Use Scenario: Suppressing commutation spikes from brushed DC motors and triac-driven AC loads in washing machines, HVAC fans, and power tools. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or relay coils to quench inductive kickback. Use Value: Handles repetitive 5.7 A surges at 0.01 % duty cycle, extending relay contact life and preventing MCU reset events.

Automotive Sensor Interface

Industrial PLC Analog Input

Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from ISO 7637-2 pulses and ESD.

IC Role / Device Role / Timing Role: Bi-directional clamping element placed across differential or single-ended signal lines upstream of protection ICs.

Use Value: Limits transient voltage to ≤87.1 V, preventing latch-up or gate oxide damage in 5 V-tolerant receivers.

Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring surges.

IC Role / Device Role / Timing Role: Primary surge shunt device mounted at connector entry point, preceding precision op-amps and ADCs.

Use Value: Absorbs up to 500 W of transient energy without failure, preserving measurement accuracy and system uptime.

Telecom Line Card Protection

Consumer Appliance Motor Control

Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and POTS interface ICs from lightning-induced surges on external ports.

IC Role / Device Role / Timing Role: First-line bi-directional TVS on unshielded twisted-pair or coaxial input traces.

Use Value: Responds in <1 ns to clamp fast-rising transients, reducing need for secondary MOV or GDT stages.

Use Scenario: Suppressing commutation spikes from brushed DC motors and triac-driven AC loads in washing machines, HVAC fans, and power tools.

IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or relay coils to quench inductive kickback.

Use Value: Handles repetitive 5.7 A surges at 0.01 % duty cycle, extending relay contact life and preventing MCU reset events.

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), same DO-214AC package, but lower P_PPM = 400 W and higher V_C = 87.1 V at 4.6 A	Suitable for space-constrained SMT layouts; less robust for high-energy surges	Select SMAJ54CA only when board area is limited and surge threat level is moderate (e.g., IEC 61000-4-5 Level 3).
1.5KE54CA	Same V_WM and bi-directionality, but larger DO-201AD package, higher P_PPM = 1500 W, and V_C = 88.0 V at 17.0 A	Better suited for primary-level AC mains or high-power motor drive protection	Choose 1.5KE54CA where surge energy exceeds 500 W or where higher I_PPM headroom is required.

Compared with SMAJ54CA and 1.5KE54CA, SA54C-E3/54 offers optimal balance of DO-15 through-hole compatibility, 500 W surge rating, and tight V_C specification - making it ideal for cost-sensitive, high-volume automotive and industrial modules requiring proven AEC-Q101-aligned reliability.

Availability

SA54C-E3/54 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply and RoHS-compliant manufacturing.

Supply support for SA54C-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 and automotive-grade validation.

The SAxxC series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in harsh environments - including automotive, industrial automation, and infrastructure equipment.

FAQ

What is the polarity configuration of SA54C-E3/54?

The SA54C-E3/54 is a bi-directional TVS diode with symmetrical terminals - neither end is marked as anode or cathode. This allows installation without orientation concern on AC-coupled or floating signal lines, simplifying assembly and eliminating reverse-polarity risk in field wiring.

Is SA54C-E3/54 AEC-Q101 qualified?

No - SA54C-E3/54 carries the E3 suffix, indicating RoHS compliance and JESD201 Class 1A whisker resistance, but not full AEC-Q101 qualification. For automotive applications requiring AEC-Q101, specify SA54CHE3/54 (HE3 suffix), which undergoes the full stress test suite per AEC-Q101 Rev D.

What does the "C" in SA54C-E3/54 signify?

The "C" denotes bi-directional functionality - distinguishing it from uni-directional variants like SA54A-E3/54. Bi-directional operation means the SA54C-E3/54 clamps transients of either polarity identically, making it appropriate for protecting balanced lines, transformer-coupled interfaces, and non-ground-referenced circuits.

What is the maximum clamping voltage of SA54C-E3/54 under surge conditions?

The SA54C-E3/54 clamps to a maximum of 87.1 V when subjected to its rated 5.7 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees the protected circuit sees no more than 87.1 V during worst-case transient events.

Can SA54C-E3/54 be used in place of SA54A-E3/54?

No - SA54C-E3/54 and SA54A-E3/54 are not interchangeable due to fundamental polarity differences. SA54A-E3/54 is uni-directional and requires correct cathode orientation; SA54C-E3/54 is bi-directional with no polarity. Substituting one for the other may result in failed protection or forward conduction in DC-biased circuits.

SA54C-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:: 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-E3/54 FAQ

1.How can I place an order for SA54C-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA54C-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 SA54C-E3/54 reliable?

The price and inventory of SA54C-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 SA54C-E3/54 is usually 5 days.

3.What payment methods are accepted for SA54C-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA54C-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA54C-E3/54?

SA54C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA54C-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 SA54C-E3/54?

For technical support, including SA54C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA54C-E3/54 requirements.

6.How does Aetrix verify that SA54C-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA54C-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 SA54C-E3/54 meets industry standards.

7.What is the process for return or replacement of SA54C-E3/54?

All SA54C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA54C-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 SA54C-E3/54 part is unused and in its original packaging.

Return procedure for SA54C-E3/54:

1.Submit a request within 90 days.

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

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