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

Vishay General Semiconductor - Diodes Division SA22C-E3/54

Name: SA22C-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA22C-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA22C-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA22C-E3/54.pdf

Description:: TVS DIODE 22VWM 39.4VC DO204AC

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Product details

Overview

SA22C-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 22 V stand-off voltage (V_WM), 24.4–26.9 V breakdown voltage (V_BR) at 1 mA, 500 W peak pulse power (10/1000 μs), 14.1 A peak pulse current (I_PPM), and 35.5 V maximum clamping voltage (V_C) - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.

For engineers reviewing the SA22C-E3/54 datasheet, SA22C-E3/54 pinout, SA22C-E3/54 application, or SA22C-E3/54 equivalent, this device is evaluated for bi-directional surge protection in automotive body electronics, industrial PLC inputs, and telecom line interface stages where symmetric transient suppression and AEC-Q101 qualification are required.

Technical Context

The SA22C-E3/54 implements a glass-passivated silicon junction optimized for fast response (<1 ps) to transient overvoltages in both polarities. Its bi-directional architecture eliminates polarity dependency, enabling direct placement across AC-coupled or differential signal paths without orientation constraints.

It operates within -55 °C to +175 °C junction temperature range, supports 3.0 W steady-state power dissipation at T_L = 75 °C, and maintains low incremental surge resistance to ensure consistent clamping performance under repetitive 10/1000 μs pulses at 0.01% duty cycle.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	22 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems.
V_BR (min/max)	24.4 V / 26.9 V at I_T = 1 mA - Confirmed breakdown threshold ensures reliable triggering above system operating voltage with tight tolerance.
V_C @ I_PPM	35.5 V at 14.1 A - Clamping voltage limits downstream component stress during worst-case 500 W transient events.
P_PPM	500 W - Peak pulse power rating per 10/1000 μs waveform; validates robustness against lightning-induced surges and relay coil flyback.
I_PPM	14.1 A - Peak pulse current capacity directly correlates with energy absorption capability (≈ 5.6 J per pulse).
T_J max	+175 °C - High junction temperature rating enables deployment in under-hood automotive and high-ambient industrial environments.
AEC-Q101	Qualified - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability requirements. Bi-directional construction means no polarity marking - terminals are electrically symmetrical.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bi-directional transient conduction path	Either lead serves as input/output terminal; no cathode band - enables blind-mounting in PCB layouts.
Leads (2)	Thermal and electrical interface to PCB	Lead length ≥ 0.230" (5.8 mm) supports mechanical strain relief; rated for solder dip ≤ 275 °C for 10 s.

Key Features

Feature	Design Value
Glass passivated chip junction	Enables stable V_BR tolerance and long-term leakage stability under thermal cycling and humidity stress.
500 W peak pulse power (10/1000 μs)	Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity without external series impedance.
AEC-Q101 qualified	Validates suitability for automotive powertrain, chassis, and body control modules requiring zero-defect reliability.
Low clamping ratio (V_C/V_BR ≈ 1.38)	Minimizes overvoltage overshoot during fast transients, protecting sensitive gate oxides in MOSFET drivers.
RoHS-compliant (E3 suffix)	Meets EU Directive 2011/65/EU; JESD 201 Class 1A whisker resistance ensures solder joint integrity in reflow assembly.

Applications

Automotive Body Control Module Inputs	Industrial PLC Analog Input Protection
Use Scenario: Protecting microcontroller GPIOs and LIN bus receivers from load dump and ESD in door module ECUs. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: With 35.5 V clamping and AEC-Q101 qualification, SA22C-E3/54 prevents latch-up and gate oxide damage during 12 V system load dump events.	Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff voltage (22 V) aligns with loop supply headroom; clamps induced transients from motor drive coupling or lightning induction. Use Value: 14.1 A I_PPM and 500 W rating absorb >90% of IEC 61000-4-4 burst energy without degradation across 100,000+ surge cycles.
Telecom Line Interface Protection	Consumer Appliance Motor Driver Feedback Lines
Use Scenario: Shielding RS-485 transceivers and isolation amplifiers in base station remote units from induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed differential-mode across A/B lines to suppress common-mode transients while preserving signal integrity up to 10 Mbps. Use Value: Symmetric bi-directional behavior ensures identical clamping in both signal polarities, avoiding DC bias shift in half-duplex communication.	Use Scenario: Protecting hall-effect sensor outputs and current sense amplifier inputs in washing machine motor control boards. IC Role / Device Role / Timing Role: Mounted at sensor connector to clamp flyback spikes from brushed DC motor commutation and relay switching. Use Value: 175 °C max junction temperature allows operation adjacent to heat-generating IGBTs without derating or thermal shutdown.

Automotive Body Control Module Inputs

Industrial PLC Analog Input Protection

Use Scenario: Protecting microcontroller GPIOs and LIN bus receivers from load dump and ESD in door module ECUs.

IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry.

Use Value: With 35.5 V clamping and AEC-Q101 qualification, SA22C-E3/54 prevents latch-up and gate oxide damage during 12 V system load dump events.

Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges.

IC Role / Device Role / Timing Role: Standoff voltage (22 V) aligns with loop supply headroom; clamps induced transients from motor drive coupling or lightning induction.

Use Value: 14.1 A I_PPM and 500 W rating absorb >90% of IEC 61000-4-4 burst energy without degradation across 100,000+ surge cycles.

Telecom Line Interface Protection

Consumer Appliance Motor Driver Feedback Lines

Use Scenario: Shielding RS-485 transceivers and isolation amplifiers in base station remote units from induced surges on long cable runs.

IC Role / Device Role / Timing Role: Placed differential-mode across A/B lines to suppress common-mode transients while preserving signal integrity up to 10 Mbps.

Use Value: Symmetric bi-directional behavior ensures identical clamping in both signal polarities, avoiding DC bias shift in half-duplex communication.

Use Scenario: Protecting hall-effect sensor outputs and current sense amplifier inputs in washing machine motor control boards.

IC Role / Device Role / Timing Role: Mounted at sensor connector to clamp flyback spikes from brushed DC motor commutation and relay switching.

Use Value: 175 °C max junction temperature allows operation adjacent to heat-generating IGBTs without derating or thermal shutdown.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ22CA	Same V_WM (22 V), lower P_PPM (400 W), SMA package (surface-mount)	Requires PCB rework for SMT layout; lacks AEC-Q101 qualification	Select when board space is constrained and automotive qualification is not required.
1.5KE22CA	Same V_WM (22 V), higher P_PPM (1500 W), DO-201AD package (larger axial)	Higher clamping voltage (36.5 V) and larger footprint; suited for higher-energy surges	Choose for industrial mains-connected equipment needing >1 kV surge margin and higher energy handling.

Compared with SMAJ22CA and 1.5KE22CA, the SA22C-E3/54 delivers optimal balance of AEC-Q101 compliance, compact DO-15 form factor, and precise 35.5 V clamping - making it preferred for cost-sensitive, high-reliability automotive and industrial edge nodes where qualification and thermal robustness are mandatory.

Availability

SA22C-E3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC analog inputs, and telecom line interface protection requiring stable component supply and full traceability.

Supply support for SA22C-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.

The SAxxC series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial automation, and infrastructure applications where failure modes must be eliminated through rigorous qualification and proven field performance.

FAQ

What is the polarity configuration of SA22C-E3/54?

The SA22C-E3/54 is a bi-directional TVS diode with symmetrical terminals - no cathode marking is present, and either lead may serve as anode or cathode depending on transient polarity. This eliminates orientation errors during automated assembly and simplifies layout for AC-coupled or differential signal paths. The device's V_BR and V_C specifications apply identically in both directions, as confirmed in Vishay Document 88378.

Does SA22C-E3/54 meet automotive qualification standards?

Yes, SA22C-E3/54 is AEC-Q101 qualified per Vishay documentation (Document 88378, Note 1), covering stress tests including high-temperature reverse bias, temperature cycling, and ESD. This certification confirms its suitability for automotive body electronics, infotainment interfaces, and chassis modules where zero-defect reliability is mandated. The "E3" suffix further denotes RoHS compliance and JESD 201 Class 1A whisker resistance.

What is the maximum clamping voltage of SA22C-E3/54 under rated surge conditions?

The SA22C-E3/54 exhibits a maximum clamping voltage (V_C) of 35.5 V at its rated peak pulse current (I_PPM) of 14.1 A, measured using the standard 10/1000 μs waveform. This value is critical for ensuring downstream components - such as 3.3 V or 5 V logic ICs - remain below absolute maximum ratings during surge events. The clamping ratio (V_C/V_BR) is approximately 1.38, indicating efficient voltage limiting.

Can SA22C-E3/54 be used in place of a unidirectional TVS like SA22A-E3/54?

No - SA22C-E3/54 is strictly bi-directional and cannot replace unidirectional variants like SA22A-E3/54 in DC-biased circuits where forward conduction must be blocked. The "C" suffix explicitly denotes bi-directional functionality, with identical V_BR and V_C in both polarities. Substitution would risk unintended conduction during normal operation in power rail protection or single-polarity signal line applications.

What is the thermal derating behavior of SA22C-E3/54 above 25 °C ambient?

SA22C-E3/54 follows Vishay's standard derating curve: its peak pulse power (P_PPM) remains constant up to 25 °C, then decreases linearly to zero at 175 °C junction temperature. Steady-state power dissipation (P_D) drops from 3.0 W at T_L = 75 °C to zero at T_L = 150 °C, as shown in Figure 5 of Document 88378. Designers must calculate junction temperature rise using lead-to-ambient thermal resistance and ensure operation stays within the 175 °C T_J limit.

SA22C-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):: 22V

Voltage - Breakdown (Min):: 24.4V

Voltage - Clamping (Max) @ Ipp:: 39.4V

Current - Peak Pulse (10/1000µs):: 22.7A

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)

SA22C-E3/54 FAQ

1.How can I place an order for SA22C-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA22C-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 SA22C-E3/54 reliable?

The price and inventory of SA22C-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 SA22C-E3/54 is usually 5 days.

3.What payment methods are accepted for SA22C-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22C-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA22C-E3/54?

SA22C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA22C-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 SA22C-E3/54?

For technical support, including SA22C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22C-E3/54 requirements.

6.How does Aetrix verify that SA22C-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA22C-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 SA22C-E3/54 meets industry standards.

7.What is the process for return or replacement of SA22C-E3/54?

All SA22C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA22C-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 SA22C-E3/54 part is unused and in its original packaging.

Return procedure for SA22C-E3/54:

1.Submit a request within 90 days.

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

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