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

Vishay General Semiconductor - Diodes Division SAC22-E3/73

Name: SAC22-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: SAC22-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SAC22-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SAC22-E3/73.pdf

Description:: TVS DIODE 22VWM 35.4VC DO204AC

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Product details

Overview

SAC22-E3/73 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® Transient Voltage Suppressor in DO-15 package, rated for 500 W peak pulse power (10/1000 µs), 22 V standoff voltage (V_WM), and 35.4 V clamping voltage at 5.0 A peak current. It protects sensitive signal lines in sensor interfaces and industrial control inputs against ESD and inductive switching transients.

For engineers reviewing the SAC22-E3/73 datasheet, SAC22-E3/73 pinout, SAC22-E3/73 application, or SAC22-E3/73 equivalent, key selection criteria include its 22 V working inverse blocking voltage, 5.0 µA max reverse leakage at V_WM, 175 °C max junction temperature, DO-15 mechanical compatibility, and unidirectional polarity with cathode band marking.

Technical Context

The SAC22-E3/73 operates as a silicon avalanche diode designed for fast transient suppression on DC or single-polarity signal paths. Its glass-passivated junction enables sub-nanosecond response time and low incremental surge resistance, critical for protecting MOSFET gates and microcontroller I/O pins from repetitive 10/1000 µs surges up to 500 W.

It is rated for continuous power dissipation of 3.0 W on an infinite heatsink at 75 °C and supports operation from –55 °C to +175 °C. The device meets JESD 22-B106 solder dip requirements (275 °C, 10 s) and JESD 201 Class 1A whisker testing, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	22 V - Maximum continuous reverse operating voltage before clamping begins
V_BR @ 1.0 mA	24.4 V min - Breakdown voltage threshold confirming reliable avalanche initiation
V_C @ I_PP = 5.0 A	35.4 V - Clamped voltage limiting stress on downstream ICs during surge events
P_PPM	500 W - Peak pulse power handling capability with 10/1000 µs waveform
I_PP @ V_C = 35.4 V	14 A - Maximum non-repetitive surge current the device can safely divert
Junction Temp Range	–55 °C to +175 °C - Enables deployment in under-hood automotive or industrial motor drive environments
Capacitance @ 0 V	50 pF - Low enough to avoid signal integrity degradation on high-speed sensor lines

Pinout & Package

Package: DO-15 (DO-204AC), axial leaded, epoxy-molded, UL 94 V-0 rated. Cathode indicated by color band. Leads are matte tin-plated and solderable per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side reference terminal	Connected to circuit ground or lowest potential node during transient clamp
Cathode	High-side transient input terminal	Connected to protected line; clamps to anode when voltage exceeds V_WM

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable breakdown voltage and long-term reliability under thermal cycling
500 W peak pulse power (10/1000 µs)	Supports robust protection against IEC 61000-4-5 Level 4 surges without derating
Low incremental surge resistance	Minimizes voltage overshoot during fast-rising transients (<1 ns response)
DO-15 mechanical standardization	Enables drop-in replacement in legacy designs using industry-standard axial footprint
RoHS-compliant E3 suffix	Meets JESD 201 Class 1A whisker test and commercial-grade environmental compliance

Applications

Industrial Sensor Interface Protection	Automotive Body Control Module Inputs
Use Scenario: Protecting 0–10 V analog sensor outputs from load dump and relay coil flyback in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: 35.4 V clamping voltage ensures microcontroller GPIO remains below absolute maximum rating during 1 kV/500 Ω surge events.	Use Scenario: Safeguarding LIN bus input pins in door module ECUs exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Standoff-rated suppressor on LIN RX line, absorbing negative-going spikes while preserving signal rise time via 50 pF capacitance. Use Value: 22 V V_WM allows full LIN signal swing (0–12 V) with margin, preventing false triggering during normal operation.
Power Supply Input Stage Clamp	Consumer Appliance Motor Driver Gate Protection
Use Scenario: Secondary-side overvoltage suppression on 24 V DC power rails feeding logic circuits in HVAC controllers. IC Role / Device Role / Timing Role: Primary transient shunt across rail-to-ground, activated only during >22 V excursions to avoid loading regulation loop. Use Value: 3.0 W steady-state power rating supports continuous operation under elevated ambient temperatures up to 75 °C.	Use Scenario: Shielding N-channel MOSFET gate-source terminals from Miller-induced voltage spikes during high-dI/dt switching. IC Role / Device Role / Timing Role: Fast-response clamp between gate and source, limiting V_GS to ≤35.4 V during turn-off oscillation. Use Value: Sub-nanosecond response and low dynamic impedance prevent gate oxide rupture under repetitive 10/1000 µs stress.

Industrial Sensor Interface Protection

Automotive Body Control Module Inputs

Use Scenario: Protecting 0–10 V analog sensor outputs from load dump and relay coil flyback in PLC I/O modules.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach ADC input or op-amp buffer.

Use Value: 35.4 V clamping voltage ensures microcontroller GPIO remains below absolute maximum rating during 1 kV/500 Ω surge events.

Use Scenario: Safeguarding LIN bus input pins in door module ECUs exposed to battery disconnect transients.

IC Role / Device Role / Timing Role: Standoff-rated suppressor on LIN RX line, absorbing negative-going spikes while preserving signal rise time via 50 pF capacitance.

Use Value: 22 V V_WM allows full LIN signal swing (0–12 V) with margin, preventing false triggering during normal operation.

Power Supply Input Stage Clamp

Consumer Appliance Motor Driver Gate Protection

Use Scenario: Secondary-side overvoltage suppression on 24 V DC power rails feeding logic circuits in HVAC controllers.

IC Role / Device Role / Timing Role: Primary transient shunt across rail-to-ground, activated only during >22 V excursions to avoid loading regulation loop.

Use Value: 3.0 W steady-state power rating supports continuous operation under elevated ambient temperatures up to 75 °C.

Use Scenario: Shielding N-channel MOSFET gate-source terminals from Miller-induced voltage spikes during high-dI/dt switching.

IC Role / Device Role / Timing Role: Fast-response clamp between gate and source, limiting V_GS to ≤35.4 V during turn-off oscillation.

Use Value: Sub-nanosecond response and low dynamic impedance prevent gate oxide rupture under repetitive 10/1000 µs stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ22A-E3/5A	Same V_WM (22 V), but SMA package (surface-mount); 400 W P_PPM; 38.9 V V_C @ 5.0 A	Requires PCB rework for SMT layout; better suited for space-constrained consumer electronics	Choose SMAJ22A-E3/5A when board area is limited and automated assembly is required.
P6KE22A	Same DO-15 package and V_WM, but higher V_C (36.5 V), lower P_PPM (600 W peak, but 1.5× longer 10/1000 µs test duration), 1000 W peak for 1.0/1000 µs	Higher clamping voltage reduces margin for 3.3 V logic; preferred for legacy industrial designs with proven P6KE qualification	Choose P6KE22A when replacing long-established designs where qualification traceability is mandatory.

Compared with SAC22-E3/73, SMAJ22A-E3/5A offers surface-mount compatibility at the cost of 20 % lower peak power and slightly higher clamping, while P6KE22A trades tighter clamping for broader legacy acceptance and higher short-duration surge tolerance - both require validation for system-level immunity compliance.

Availability

SAC22-E3/73 is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive body control module inputs, and power supply input stage clamping requiring stable component supply and consistent DO-15 mechanical form factor.

Supply support for SAC22-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 supplier of discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, thermal performance, and application-specific optimization.

The SAC series is engineered for high-energy transient suppression in harsh environments, targeting industrial automation, automotive subsystems, and telecom infrastructure where sustained surge immunity and long-term parametric stability are critical.

FAQ

What is the maximum clamping voltage of the SAC22-E3/73 at 5.0 A peak pulse current?

The SAC22-E3/73 has a maximum clamping voltage (V_C) of 35.4 V when subjected to a 5.0 A peak pulse current with a 10/1000 µs waveform. This value is measured per the conditions specified in the Vishay datasheet Document Number 88379 and defines the upper voltage limit imposed on protected circuitry during transient events. Maintaining V_C at this level ensures compatibility with 3.3 V and 5 V logic interfaces while providing sufficient margin below typical IC absolute maximum ratings. The SAC22-E3/73 achieves this clamping performance through its optimized silicon avalanche structure and low dynamic impedance.

Is the SAC22-E3/73 suitable for bidirectional signal line protection?

No, the SAC22-E3/73 is a unidirectional transient voltage suppressor and is not suitable for bidirectional AC signal line protection without external configuration. Its polarity is fixed, with the cathode marked by a color band, and it conducts only when the cathode is driven positive relative to the anode. For AC or differential lines such as RS-485 or telephone interfaces, two SAC22-E3/73 devices must be used in series opposition - one anode-to-line and one cathode-to-line - as shown in Figure 4 of the SAC5.0–SAC50 datasheet. Using a single SAC22-E3/73 on an AC path would result in unintended conduction during normal negative half-cycles.

What is the junction temperature rating of the SAC22-E3/73 and how does it affect thermal design?

The SAC22-E3/73 has a maximum junction temperature (T_J) rating of +175 °C and a minimum of –55 °C, supporting operation in extended industrial and under-hood automotive environments. Its 3.0 W power dissipation rating applies at a lead temperature (T_L) of 75 °C on an infinite heatsink, meaning thermal design must ensure adequate copper pour, trace width, and ambient airflow to maintain lead temperature below this threshold during continuous operation. Exceeding T_J max risks parametric drift and accelerated wear-out; therefore, the SAC22-E3/73 should be mounted with minimal thermal resistance to ambient, especially in sealed enclosures above 70 °C ambient.

Does the SAC22-E3/73 meet RoHS and lead-free soldering requirements?

Yes, the SAC22-E3/73 carries the E3 suffix, indicating full RoHS compliance and commercial-grade qualification. Its matte tin-plated leads are compatible with lead-free reflow profiles up to 260 °C peak and meet J-STD-002 solderability standards. The device also passes JESD 201 Class 1A whisker testing, ensuring mechanical reliability after multiple thermal cycles. The molded epoxy compound complies with UL 94 V-0 flammability requirements, and the entire construction avoids restricted substances per Directive 2011/65/EU. No exemptions apply - the SAC22-E3/73 is fully lead-free and halogen-free.

How does the SAC22-E3/73 compare to the SAC22A variant in terms of electrical performance?

The SAC22-E3/73 and SAC22A share identical electrical specifications - including V_WM = 22 V, V_BR ≥ 24.4 V, V_C = 35.4 V @ 5.0 A, and P_PPM = 500 W - but differ in packaging and qualification. SAC22-E3/73 uses the DO-15 (DO-204AC) package with E3 RoHS-compliant plating and is commercial-grade; SAC22A may denote a different packaging format (e.g., bulk vs. tape-and-reel) or alternate suffix coding per ordering matrix. Per Vishay's ordering information table, SAC22-E3/73 specifically indicates 7" reel packaging (code 73), whereas SAC22A alone lacks that delivery mode designation. Electrical behavior is identical across these variants when tested under the same conditions.

SAC22-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:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 22V

Voltage - Breakdown (Min):: 24.4V

Voltage - Clamping (Max) @ Ipp:: 35.4V

Current - Peak Pulse (10/1000µs):: 14A

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)

SAC22-E3/73 FAQ

1.How can I place an order for SAC22-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for SAC22-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 SAC22-E3/73 reliable?

The price and inventory of SAC22-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 SAC22-E3/73 is usually 5 days.

3.What payment methods are accepted for SAC22-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAC22-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SAC22-E3/73?

SAC22-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SAC22-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 SAC22-E3/73?

For technical support, including SAC22-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAC22-E3/73 requirements.

6.How does Aetrix verify that SAC22-E3/73 is sourced from the original manufacturer or authorized distributors?

All SAC22-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 SAC22-E3/73 meets industry standards.

7.What is the process for return or replacement of SAC22-E3/73?

All SAC22-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SAC22-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 SAC22-E3/73 part is unused and in its original packaging.

Return procedure for SAC22-E3/73:

1.Submit a request within 90 days.

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

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