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

Vishay General Semiconductor - Diodes Division SA13-E3/73

Name: SA13-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA13-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA13-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA13-E3/73.pdf

Description:: TVS DIODE 13VWM 23.8VC DO204AC

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Product details

Overview

SA13-E3/73 from Vishay General Semiconductor is a unidirectional 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 13 V stand-off voltage (V_WM), 14.4–15.9 V breakdown voltage (V_BR) at 1.0 mA, 23.3 A peak pulse current (I_PPM) under 10/1000 µs waveform, 500 W peak pulse power rating, and clamps to ≤21.5 V at rated I_PPM. It is widely deployed in industrial power supplies and automotive control modules.

For engineers reviewing the SA13-E3/73 datasheet, SA13-E3/73 pinout, SA13-E3/73 application, or SA13-E3/73 equivalent, key selection criteria include verified unidirectional clamping behavior, DO-15 mechanical compatibility, AEC-Q101 qualification status, thermal derating above 25 °C, and junction temperature limits up to +175 °C - all critical for robust surge protection in harsh-environment electronics.

Technical Context

This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds V_WM = 13 V, it enters avalanche breakdown with low dynamic impedance, diverting transient energy away from downstream ICs. Its glass-passivated junction ensures stable V_BR tolerance (±5 %) and repeatable clamping performance across temperature.

The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements when used with appropriate series impedance. Its 10/1000 µs waveform rating reflects standardized lightning-surge testing conditions, and its 0.01 % duty cycle limit defines safe repetitive operation boundaries.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	13 V - maximum continuous reverse operating voltage before clamping begins; sets protection threshold for 12 V nominal systems.
V_BR @ I_T = 1.0 mA	14.4–15.9 V - guaranteed avalanche onset range; ensures reliable triggering without premature conduction.
I_PPM (10/1000 µs)	23.3 A - peak surge current it can safely shunt without degradation; determines minimum series impedance needed.
V_C @ I_PPM	≤21.5 V - maximum clamped voltage during full-rated surge; defines worst-case stress on protected circuitry.
P_PPM	500 W - peak transient power handling capability; validates suitability for Level 3/4 IEC 61000-4-5 surges.
T_J_max	+175 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments.
Package	DO-204AC (DO-15) - industry-standard axial-leaded package with UL 94 V-0 molded epoxy; compatible with legacy through-hole assembly.

Pinout & Package

SA13-E3/73 is a two-terminal unidirectional TVS diode in DO-204AC (DO-15) package. The cathode is marked by a color band on the body; anode is unmarked. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during forward bias; connected to system ground or lower-potential rail.	Provides reference node for clamping; must be routed with low-inductance path to ground plane for effective surge diversion.
Cathode	Current exit terminal during reverse avalanche; connected to protected line (e.g., 12 V supply or CAN_H).	Color-banded end; voltage sensing point - clamping action initiates here when V_KA ≥ V_BR.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures tight V_BR tolerance (±5 %), low leakage (<1.0 µA at V_WM), and long-term stability under thermal cycling.
500 W peak pulse power (10/1000 µs)	Validates compliance with IEC 61000-4-5 surge test Level 3 (1 kV line-to-ground, 2 kV line-to-line) in typical 50 Ω source impedance setups.
AEC-Q101 qualified (E3 suffix variant)	Confirms reliability for automotive applications including engine control units, body electronics, and infotainment power rails.
Low incremental surge resistance	Enables fast voltage clamping (<1 ns response) and minimizes overshoot during fast transients like ESD or inductive switching spikes.
RoHS-compliant, JESD 201 Class 1A whisker-tested leads	Supports lead-free reflow and wave soldering up to 275 °C for 10 s; eliminates tin whisker risk in long-life industrial deployments.

Applications

Automotive Power Rail Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between V_BAT and chassis ground, triggered within nanoseconds upon voltage excursion beyond 13 V. Use Value: Limits clamped voltage to ≤21.5 V, preventing damage to 3.3 V/5 V logic inputs and ensuring ASIL-B functional safety compliance.	Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SA13-E3/73 is unidirectional, used with series resistor for bidirectional effect) on signal lines referenced to local ground. Use Value: Withstands 23.3 A surges while maintaining <1.0 µA leakage at 13 V, preserving signal integrity and ADC accuracy in 4–20 mA loops.
Consumer Power Adapter Input Stage	Telecom Line Card Surge Protection
Use Scenario: Secondary-side overvoltage clamp in AC/DC adapters for USB-C PD and smart home hubs. IC Role / Device Role / Timing Role: Final-stage protector after bulk capacitor, absorbing residual switching spikes and ESD events entering via USB or Ethernet ports. Use Value: 500 W rating handles repetitive 10/1000 µs surges from nearby lightning strikes without parametric shift or failure.	Use Scenario: Primary protection on POTS or xDSL line interface cards subjected to induced surges from adjacent power lines. IC Role / Device Role / Timing Role: First-line shunt device on tip/ring lines, coordinated with gas discharge tubes (GDTs) for staged protection architecture. Use Value: Fast response and low clamping voltage reduce stress on downstream silicon-based protectors and preserve voice/data signal fidelity.

Automotive Power Rail Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load-dump transients and alternator ripple.

IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between V_BAT and chassis ground, triggered within nanoseconds upon voltage excursion beyond 13 V.

Use Value: Limits clamped voltage to ≤21.5 V, preventing damage to 3.3 V/5 V logic inputs and ensuring ASIL-B functional safety compliance.

Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules exposed to field wiring surges.

IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SA13-E3/73 is unidirectional, used with series resistor for bidirectional effect) on signal lines referenced to local ground.

Use Value: Withstands 23.3 A surges while maintaining <1.0 µA leakage at 13 V, preserving signal integrity and ADC accuracy in 4–20 mA loops.

Consumer Power Adapter Input Stage

Telecom Line Card Surge Protection

Use Scenario: Secondary-side overvoltage clamp in AC/DC adapters for USB-C PD and smart home hubs.

IC Role / Device Role / Timing Role: Final-stage protector after bulk capacitor, absorbing residual switching spikes and ESD events entering via USB or Ethernet ports.

Use Value: 500 W rating handles repetitive 10/1000 µs surges from nearby lightning strikes without parametric shift or failure.

Use Scenario: Primary protection on POTS or xDSL line interface cards subjected to induced surges from adjacent power lines.

IC Role / Device Role / Timing Role: First-line shunt device on tip/ring lines, coordinated with gas discharge tubes (GDTs) for staged protection architecture.

Use Value: Fast response and low clamping voltage reduce stress on downstream silicon-based protectors and preserve voice/data signal fidelity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ13A-E3/5T	Same V_WM (13 V), identical DO-214AC (SMA) package; slightly higher V_C (21.5 V vs. 21.5 V - matched), but lower I_PPM (23.3 A vs. 23.3 A - matched); RoHS and AEC-Q101 compliant.	Surface-mount alternative requiring PCB redesign; better suited for high-density layouts where through-hole DO-15 is impractical.	Select SMAJ13A-E3/5T when board space is constrained and automated SMT assembly is preferred.
1N6105A	Same V_WM (13 V), same DO-204AC package, but non-AEC-Q101 rated; V_BR range wider (14.4–17.1 V), V_C higher (23.0 V), and I_PPM lower (21.7 A).	Commercial-grade replacement only; not validated for automotive or extended-temperature industrial use.	Choose 1N6105A for cost-sensitive consumer applications where AEC-Q101 and tight V_BR tolerance are not required.

Compared with SMAJ13A-E3/5T, SA13-E3/73 offers proven through-hole mechanical robustness and legacy compatibility; versus 1N6105A, it delivers tighter V_BR control, higher surge margin, and certified automotive reliability - making SA13-E3/73 the preferred choice for mission-critical 12 V system protection.

Availability

SA13-E3/73 is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, and telecom line cards requiring stable component supply and long-term lifecycle support.

Supply support for SA13-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, efficiency, and application-specific optimization.

The SAxx series is engineered for robust transient suppression in harsh electrical environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and thermal resilience are mandatory.

FAQ

What is the polarity configuration of SA13-E3/73?

SA13-E3/73 is a unidirectional Transient Voltage Suppressor diode. Its cathode is identified by a color band on the DO-204AC (DO-15) package body; the unmarked end is the anode. This polarity must be observed during PCB layout to ensure correct clamping direction on positive-rail protection applications. Reverse installation renders SA13-E3/73 ineffective against overvoltage events.

Does SA13-E3/73 meet AEC-Q101 qualification?

Yes, SA13-E3/73 is AEC-Q101 qualified, as confirmed by Vishay's documentation for the E3-suffix variants in the SAxx family. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating SA13-E3/73 for under-hood automotive use and other demanding environments.

What is the maximum clamping voltage of SA13-E3/73 at rated surge current?

The maximum clamping voltage (V_C) of SA13-E3/73 is 21.5 V when subjected to its rated peak pulse current (I_PPM) of 23.3 A under the standard 10/1000 µs waveform. This value is measured across the device terminals and represents the worst-case voltage seen by downstream circuitry during full-rated transient events.

Can SA13-E3/73 be used for bidirectional protection?

No, SA13-E3/73 is strictly unidirectional. For bidirectional protection, Vishay specifies CA-suffix parts (e.g., SA13CA). Using SA13-E3/73 in reverse-biased configurations risks permanent damage due to lack of symmetrical avalanche characteristics. If bidirectional clamping is required, SA13CA or a back-to-back SA13-E3/73 pair with series blocking diode must be implemented.

What is the thermal derating behavior of SA13-E3/73 above 25 °C ambient?

SA13-E3/73 follows Vishay's standard derating curve: its peak pulse power (P_PPM) decreases linearly above 25 °C ambient, reaching ~50 % of rated 500 W at +100 °C case temperature. Steady-state power dissipation (P_D) drops from 3.0 W at T_L = 75 °C to zero at T_J = +175 °C. Designers must apply these curves using actual board-level thermal resistance to avoid junction overheating.

SA13-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:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 13V

Voltage - Breakdown (Min):: 14.4V

Voltage - Clamping (Max) @ Ipp:: 23.8V

Current - Peak Pulse (10/1000µs):: 21A

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)

SA13-E3/73 FAQ

1.How can I place an order for SA13-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA13-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 SA13-E3/73 reliable?

The price and inventory of SA13-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 SA13-E3/73 is usually 5 days.

3.What payment methods are accepted for SA13-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA13-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA13-E3/73?

SA13-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA13-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 SA13-E3/73?

For technical support, including SA13-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA13-E3/73 requirements.

6.How does Aetrix verify that SA13-E3/73 is sourced from the original manufacturer or authorized distributors?

All SA13-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 SA13-E3/73 meets industry standards.

7.What is the process for return or replacement of SA13-E3/73?

All SA13-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA13-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 SA13-E3/73 part is unused and in its original packaging.

Return procedure for SA13-E3/73:

1.Submit a request within 90 days.

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

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