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

Vishay General Semiconductor - Diodes Division SA48-E3/54

Name: SA48-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA48-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA48-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA48-E3/54.pdf

Description:: TVS DIODE 48VWM 85.5VC DO204AC

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Product details

Overview

SA48-E3/54 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 48 V stand-off voltage (V_WM), 53.3–58.9 V breakdown voltage (V_BR) at 1 mA, 77.4 V maximum clamping voltage (V_C) at 6.5 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive body control modules, and PoE-powered Ethernet interfaces.

For engineers reviewing the SA48-E3/54 datasheet, SA48-E3/54 pinout, SA48-E3/54 application, or SA48-E3/54 equivalent, this device serves as a robust, AEC-Q101-qualified transient protector for 48 V nominal systems requiring fast response (<1 ns), low clamping ratio (V_C/V_BR ≈ 1.35), and stable operation from –55 °C to +175 °C junction temperature.

Technical Context

The SA48-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling precise reverse-breakdown behavior under transient stress. Its uni-directional polarity uses a cathode band marking and exhibits 3.5 V maximum forward voltage at 100 A surge, supporting high-energy inductive load switching protection.

It delivers 500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal derating above 25 °C ambient and full-rated performance up to 175 °C junction temperature. The device meets JESD22-B106 solderability standards and JESD201 Class 1A whisker resistance requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	48 V - Maximum continuous reverse operating voltage before conduction begins; sets system DC rail compatibility.
V_BR (min/max)	53.3 V / 58.9 V at 1 mA - Ensures reliable, repeatable avalanche initiation across production lot and temperature range.
V_C @ I_PPM	77.4 V at 6.5 A - Clamps transients to safe levels for downstream 80 V-rated MOSFETs or microcontrollers.
P_PPM	500 W - Sustains high-energy surges such as ISO 7637-2 Pulse 1/2a/5a without degradation.
I_FSM	70 A - Withstands 10 ms half-sine surge events common in automotive load-dump scenarios.
T_J max	+175 °C - Enables placement near heat sources (e.g., power converters) without thermal derating loss.
Package	DO-204AC (DO-15) - Industry-standard axial leaded package compatible with automated through-hole insertion and wave soldering.

Pinout & Package

DO-204AC (DO-15) molded epoxy package with matte tin-plated leads; cathode indicated by color band on one end. Leads conform to J-STD-002 and JESD 22-B102 solderability standards.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / transient return path	Connected to ground or low-impedance return plane; completes clamping loop during positive transients.
Cathode	Avalanche conduction node / protected line connection	Connected to the line being protected (e.g., 48 V supply rail); conducts when V_in exceeds V_BR.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR tolerance (±5%) and long-term reliability under humidity and thermal cycling.
500 W peak pulse power (10/1000 µs)	Protects against high-energy transients including IEC 61000-4-5 Level 4 (4 kV line-to-line) without failure.
AEC-Q101 qualified	Validated for automotive under-hood applications with extended temperature and lifetime stress testing.
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients (e.g., ESD > 30 kV/µs), improving system immunity.
RoHS-compliant, JESD201 Class 1A whisker resistant	Supports lead-free manufacturing and eliminates tin whisker risk in high-reliability industrial deployments.

Applications

Industrial Motor Drives	Automotive Body Control Modules
Use Scenario: Protection of 48 V DC bus against inductive kickback from brushed DC motors and solenoid drivers. IC Role / Device Role / Timing Role: Primary transient clamp placed directly across motor terminals or H-bridge supply rails. Use Value: Limits voltage spikes to ≤77.4 V, preventing gate oxide damage to 80 V-rated MOSFETs and ensuring functional safety compliance.	Use Scenario: Safeguarding LIN/CAN interface power inputs and microcontroller I/O pins from battery load dump and jump-start surges. IC Role / Device Role / Timing Role: First-line overvoltage suppressor on 48 V auxiliary supply rail feeding BCM sub-circuits. Use Value: Responds in <1 ns to clamp 100 V/100 ms load dump events within specification limits, preserving ASIL-B subsystem integrity.
Telecom Power Feeds	Medical Imaging Power Supplies
Use Scenario: Input-stage protection for 48 V PoE-powered base stations and remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end TVS on DC input before DC/DC conversion and filtering stages. Use Value: Absorbs 500 W transient energy without thermal runaway, maintaining uptime during outdoor installation lightning exposure.	Use Scenario: Overvoltage suppression on isolated 48 V auxiliary supplies powering X-ray detector sensor bias circuits. IC Role / Device Role / Timing Role: Secondary-level protector after primary isolation, guarding against internal switching transients. Use Value: Provides predictable clamping with ±5% V_BR tolerance, ensuring consistent sensor bias stability and diagnostic accuracy.

Industrial Motor Drives

Automotive Body Control Modules

Use Scenario: Protection of 48 V DC bus against inductive kickback from brushed DC motors and solenoid drivers.

IC Role / Device Role / Timing Role: Primary transient clamp placed directly across motor terminals or H-bridge supply rails.

Use Value: Limits voltage spikes to ≤77.4 V, preventing gate oxide damage to 80 V-rated MOSFETs and ensuring functional safety compliance.

Use Scenario: Safeguarding LIN/CAN interface power inputs and microcontroller I/O pins from battery load dump and jump-start surges.

IC Role / Device Role / Timing Role: First-line overvoltage suppressor on 48 V auxiliary supply rail feeding BCM sub-circuits.

Use Value: Responds in <1 ns to clamp 100 V/100 ms load dump events within specification limits, preserving ASIL-B subsystem integrity.

Telecom Power Feeds

Medical Imaging Power Supplies

Use Scenario: Input-stage protection for 48 V PoE-powered base stations and remote radio units exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Front-end TVS on DC input before DC/DC conversion and filtering stages.

Use Value: Absorbs 500 W transient energy without thermal runaway, maintaining uptime during outdoor installation lightning exposure.

Use Scenario: Overvoltage suppression on isolated 48 V auxiliary supplies powering X-ray detector sensor bias circuits.

IC Role / Device Role / Timing Role: Secondary-level protector after primary isolation, guarding against internal switching transients.

Use Value: Provides predictable clamping with ±5% V_BR tolerance, ensuring consistent sensor bias stability and diagnostic accuracy.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ48A-E3/5T	Same V_WM (48 V), lower P_PPM (400 W), SMA package (surface-mount)	Requires PCB rework for SMT layout; unsuitable for through-hole legacy designs.	Select when board space is constrained and automated SMT assembly is available.
1.5KE48A	Same V_WM and P_PPM, but DO-201AD package (larger, higher thermal mass), higher I_FSM (100 A)	Better suited for high-surge industrial environments where mechanical robustness and thermal margin are prioritized.	Choose when surge repetition rate or thermal cycling endurance exceeds SA48-E3/54 capability.

Compared with SMAJ48A-E3/5T and 1.5KE48A, the SA48-E3/54 offers optimal balance of AEC-Q101 qualification, DO-15 through-hole compatibility, and 500 W surge handling - making it preferred for automotive and industrial upgrades where footprint and qualification alignment matter.

Availability

SA48-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for SA48-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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.

The SAxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, standardized transient protection in harsh-environment DC power and signal line applications.

FAQ

What is the breakdown voltage range for SA48-E3/54?

The SA48-E3/54 has a guaranteed breakdown voltage (V_BR) range of 53.3 V to 58.9 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across temperature and production lots, critical for protecting 48 V systems with narrow voltage margins. The SA48-E3/54 maintains this spec from –55 °C to +175 °C junction temperature.

Is SA48-E3/54 suitable for automotive applications?

Yes, SA48-E3/54 is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C, making it suitable for under-hood and chassis-mounted automotive applications. Its glass-passivated junction, JESD201 Class 1A whisker resistance, and 70 A I_FSM support compliance with ISO 7637-2 load-dump and pulse immunity requirements. The SA48-E3/54 is commonly used in BCM, ADAS camera power rails, and 48 V mild-hybrid subsystems.

What is the clamping voltage of SA48-E3/54 at its rated peak pulse current?

The SA48-E3/54 clamps to a maximum of 77.4 V at its rated peak pulse current of 6.5 A (10/1000 µs waveform). This clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events. The low V_C/V_BR ratio (~1.35) reflects efficient avalanche conduction and minimal voltage overshoot - essential for safeguarding 80 V-rated power devices downstream of the SA48-E3/54.

Does SA48-E3/54 have bi-directional capability?

No, SA48-E3/54 is a uni-directional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only in reverse bias above V_BR and blocks forward current up to 3.5 V at 100 A. For AC or bidirectional signal line protection, a CA-suffixed variant like SA48CA would be required. The SA48-E3/54 must be installed with correct polarity - cathode toward the protected line - to function as intended.

What packaging and reel configuration does SA48-E3/54 ship in?

SA48-E3/54 ships in 13-inch diameter paper tape and reel format, with a base quantity of 4000 units per reel and a preferred package code of "54". The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD22-B102 wetting requirements. Unit weight is 0.432 g per device.

SA48-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:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 48V

Voltage - Breakdown (Min):: 53.3V

Voltage - Clamping (Max) @ Ipp:: 85.5V

Current - Peak Pulse (10/1000µs):: 5.8A

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)

SA48-E3/54 FAQ

1.How can I place an order for SA48-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA48-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 SA48-E3/54 reliable?

The price and inventory of SA48-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 SA48-E3/54 is usually 5 days.

3.What payment methods are accepted for SA48-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA48-E3/54?

SA48-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA48-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 SA48-E3/54?

For technical support, including SA48-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48-E3/54 requirements.

6.How does Aetrix verify that SA48-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA48-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 SA48-E3/54 meets industry standards.

7.What is the process for return or replacement of SA48-E3/54?

All SA48-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA48-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 SA48-E3/54 part is unused and in its original packaging.

Return procedure for SA48-E3/54:

1.Submit a request within 90 days.

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

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