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

Vishay General Semiconductor - Diodes Division SA54CA-E3/54

Name: SA54CA-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA54CA-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA54CA-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA54CA-E3/54.pdf

Description:: TVS DIODE 54VWM 87.1VC DO204AC

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Product details

Overview

SA54CA-E3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 54 V standoff voltage (V_WM), 60.0–66.3 V breakdown voltage (V_BR), 500 W peak pulse power (10/1000 μs), <1.0 μA reverse leakage at V_WM, and clamps to ≤87.1 V at 5.7 A peak pulse current - used in automotive sensor interface protection and industrial I/O line surge suppression.

For engineers reviewing the SA54CA-E3/54 datasheet, SA54CA-E3/54 pinout, SA54CA-E3/54 application, or SA54CA-E3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal mapping, AEC-Q101 qualification status, bidirectional clamping behavior, and direct alternatives for ESD/lightning transient protection in 24 V and 48 V systems.

Technical Context

The SA54CA-E3/54 operates as a symmetric 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 up to 0.01 % duty cycle.

Designed for operation across -55 °C to +175 °C junction temperature, it supports high-reliability automotive and industrial environments. The device meets AEC-Q101 stress testing requirements and exhibits a 65 mV/°C temperature coefficient of V_BR, allowing predictable derating in elevated ambient conditions.

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 1.0 mA - guaranteed avalanche onset range defining clamping threshold
V_C @ I_PPM	≤87.1 V at 5.7 A - maximum clamped voltage during 500 W transient, limiting downstream stress
I_PPM	5.7 A - peak pulse current capability under 10/1000 μs waveform, defining surge handling capacity
P_PPM	500 W - transient energy absorption rating, enabling protection against IEC 61000-4-5 Level 3 surges
T_J max	+175 °C - maximum junction temperature supporting under-hood and industrial control cabinet use
Leakage @ V_WM	<1.0 μA - minimal standby power loss and signal integrity impact in high-impedance circuits

Pinout & Package

SA54CA-E3/54 uses the DO-15 (DO-204AC) axial-leaded package: molded epoxy body, matte tin-plated leads, RoHS-compliant, no polarity marking (bidirectional).

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bidirectional avalanche junction	No cathode band; either lead functions identically - enables placement without orientation check
Lead 1	Terminal for PCB mounting and thermal conduction	Matte tin-plated, solderable per J-STD-002; supports 275 °C dip soldering (10 s max)
Lead 2	Terminal for PCB mounting and thermal conduction	Identical to Lead 1; symmetric construction eliminates polarity-dependent layout constraints

Key Features

Feature	Design Value
Glass-passivated chip junction	Ensures stable V_BR over lifetime and immunity to humidity-induced parameter drift
500 W peak pulse power (10/1000 μs)	Supports IEC 61000-4-5 2 Ω/42 Ω coupling network surge testing at Level 3 (1 kV/2 kV)
AEC-Q101 qualified	Validated for automotive applications including engine control modules and ADAS sensor interfaces
Low incremental clamping resistance	Enables tight V_C – V_BR margin (≤27.1 V), minimizing voltage overshoot during fast transients
UL 94 V-0 molding compound	Meets flammability safety requirements for enclosed industrial and transportation equipment

Applications

Automotive Sensor Protection	Industrial PLC I/O Protection
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching protected ICs. Use Value: Clamps 500 W transients to ≤87.1 V while maintaining sub-μA leakage - preserving signal fidelity and preventing false triggering in precision sensor front-ends.	Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges (e.g., relay coil back-EMF, lightning-coupled noise). IC Role / Device Role / Timing Role: Standoff-rated TVS placed across channel terminals to clamp common-mode and differential surges before signal conditioning circuitry. Use Value: Withstands repeated 10/1000 μs pulses at 0.01 % duty cycle and operates up to +175 °C - ensuring long-term reliability in uncooled control cabinets.
Telecom Line Interface	Power Supply Input Protection
Use Scenario: Shielding RS-485/RS-232 data lines in base station remote units from ESD and induced lightning surges in outdoor telecom enclosures. IC Role / Device Role / Timing Role: Bidirectional TVS connected between differential pair and ground to suppress both polarities of fast-rising transients. Use Value: Symmetric V_BR (60.0–66.3 V) and low capacitance enable clean signal integrity up to 10 Mbps while meeting IEC 61000-4-2 Level 4 (15 kV air/8 kV contact).	Use Scenario: Secondary-side transient suppression on 48 V DC power rails feeding FPGA or microcontroller subsystems in networking equipment. IC Role / Device Role / Timing Role: Standoff-clamp device placed after bulk filter but before point-of-load regulator to absorb residual switching spikes and external surges. Use Value: 54 V V_WM allows safe operation with 48 V ±10 % nominal rail; 87.1 V clamping prevents overvoltage damage to 3.3 V/5 V LDOs and PMICs downstream.

Automotive Sensor Protection

Industrial PLC I/O Protection

Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle subsystems.

IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching protected ICs.

Use Value: Clamps 500 W transients to ≤87.1 V while maintaining sub-μA leakage - preserving signal fidelity and preventing false triggering in precision sensor front-ends.

Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges (e.g., relay coil back-EMF, lightning-coupled noise).

IC Role / Device Role / Timing Role: Standoff-rated TVS placed across channel terminals to clamp common-mode and differential surges before signal conditioning circuitry.

Use Value: Withstands repeated 10/1000 μs pulses at 0.01 % duty cycle and operates up to +175 °C - ensuring long-term reliability in uncooled control cabinets.

Telecom Line Interface

Power Supply Input Protection

Use Scenario: Shielding RS-485/RS-232 data lines in base station remote units from ESD and induced lightning surges in outdoor telecom enclosures.

IC Role / Device Role / Timing Role: Bidirectional TVS connected between differential pair and ground to suppress both polarities of fast-rising transients.

Use Value: Symmetric V_BR (60.0–66.3 V) and low capacitance enable clean signal integrity up to 10 Mbps while meeting IEC 61000-4-2 Level 4 (15 kV air/8 kV contact).

Use Scenario: Secondary-side transient suppression on 48 V DC power rails feeding FPGA or microcontroller subsystems in networking equipment.

IC Role / Device Role / Timing Role: Standoff-clamp device placed after bulk filter but before point-of-load regulator to absorb residual switching spikes and external surges.

Use Value: 54 V V_WM allows safe operation with 48 V ±10 % nominal rail; 87.1 V clamping prevents overvoltage damage to 3.3 V/5 V LDOs and PMICs downstream.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ54A	Surface-mount SMA package (vs. axial DO-15); same V_WM/V_BR/P_PPM; slightly higher V_C (88.0 V)	Requires PCB re-layout for SMT assembly; better high-frequency response due to lower parasitic inductance	Select when board space is constrained and automated assembly is preferred over through-hole.
1.5KE54CA	Higher P_PPM (1500 W); larger DO-204AL package; same V_WM/V_BR range; higher I_PPM (27.3 A)	Used where higher single-event surge margin is required (e.g., AC mains-connected equipment), not automotive-grade	Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and AEC-Q101 is not mandatory.

Compared with SMAJ54A and 1.5KE54CA, SA54CA-E3/54 offers AEC-Q101 qualification and DO-15 mechanical robustness ideal for vibration-prone automotive harness connections, while delivering precise 54 V standoff and low-leakage performance suited for battery-sensitive systems.

Availability

SA54CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and 48 V power supply input stages requiring stable component supply and long-lifecycle support.

Supply support for SA54CA-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 passive components with emphasis on reliability and automotive qualification.

The SAxxCA series is part of Vishay's TransZORB® TVS platform, engineered specifically for bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and stable clamping performance.

FAQ

What is the standoff voltage rating of SA54CA-E3/54?

The SA54CA-E3/54 has a rated standoff voltage (V_WM) of 54 V, meaning it remains non-conductive below this reverse voltage level. This value is confirmed in the Vishay datasheet (Document Number 88378, page 2) and defines the maximum continuous operating voltage before avalanche conduction begins. The SA54CA-E3/54 maintains <1.0 μA leakage current at this voltage, making it suitable for 48 V nominal systems with 10 % tolerance.

Is SA54CA-E3/54 bidirectional or unidirectional?

SA54CA-E3/54 is a bidirectional TVS diode, as indicated by the "CA" suffix per Vishay's naming convention. Its electrical characteristics - including V_BR, V_C, and I_PPM - apply identically in both directions. Unlike unidirectional types, it carries no cathode band marking and may be installed without orientation concern. This symmetry is essential for protecting AC-coupled or differential signal lines.

Does SA54CA-E3/54 meet AEC-Q101 qualification?

Yes, SA54CA-E3/54 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (page 3, Note 1). This qualification confirms its suitability for automotive applications, including engine control units, body electronics, and ADAS sensor interfaces. The "E3" suffix denotes RoHS-compliant commercial grade, while "HE3" variants are designated for AEC-Q101 - however, the SA54CA-E3/54 itself is listed under AEC-Q101 qualified devices in the ordering table and characteristics summary.

What is the clamping voltage of SA54CA-E3/54 at its rated peak pulse current?

The SA54CA-E3/54 clamps to a maximum of 87.1 V at its rated peak pulse current of 5.7 A (10/1000 μs waveform), per the Electrical Characteristics table on page 2 of the Vishay datasheet. This clamping voltage represents the upper limit of voltage seen by downstream circuitry during a standardized surge event, and is critical for ensuring protected ICs remain within absolute maximum ratings. The SA54CA-E3/54 achieves this with low incremental resistance, resulting in a V_C – V_BR margin of ≤27.1 V.

What package type does SA54CA-E3/54 use?

SA54CA-E3/54 uses the DO-15 (also designated DO-204AC) axial-leaded package, as specified in the Mechanical Data section (page 1) and Package Outline Dimensions (page 5) of the Vishay datasheet. It features a molded epoxy body, matte tin-plated leads compliant with J-STD-002, and meets UL 94 V-0 flammability rating. The DO-15 form factor provides mechanical robustness for through-hole mounting in high-vibration environments such as automotive and industrial control systems.

SA54CA-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:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 54V

Voltage - Breakdown (Min):: 60V

Voltage - Clamping (Max) @ Ipp:: 87.1V

Current - Peak Pulse (10/1000µs):: 5.7A

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)

SA54CA-E3/54 FAQ

1.How can I place an order for SA54CA-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA54CA-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 SA54CA-E3/54 reliable?

The price and inventory of SA54CA-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 SA54CA-E3/54 is usually 5 days.

3.What payment methods are accepted for SA54CA-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA54CA-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA54CA-E3/54?

SA54CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA54CA-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 SA54CA-E3/54?

For technical support, including SA54CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA54CA-E3/54 requirements.

6.How does Aetrix verify that SA54CA-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA54CA-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 SA54CA-E3/54 meets industry standards.

7.What is the process for return or replacement of SA54CA-E3/54?

All SA54CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA54CA-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 SA54CA-E3/54 part is unused and in its original packaging.

Return procedure for SA54CA-E3/54:

1.Submit a request within 90 days.

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

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