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

Vishay General Semiconductor - Diodes Division SA17C-E3/54

Name: SA17C-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SA17C-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA17C-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: SA17C-E3/54.pdf

Description:: TVS DIODE 17VWM 30.5VC DO204AC

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Product details

Overview

SA17C-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 170 V stand-off voltage (V_WM), 209 V minimum breakdown voltage (V_BR), 500 W peak pulse power (10/1000 μs), 275 V maximum clamping voltage at rated IPPM, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the SA17C-E3/54 datasheet, SA17C-E3/54 pinout, SA17C-E3/54 application, or SA17C-E3/54 equivalent, this device is selected for robust overvoltage protection in automotive sensor interfaces, industrial I/O modules, and telecom line drivers where bidirectional surge immunity and low leakage (<1.0 μA at V_WM) are critical.

Technical Context

The SA17C-E3/54 operates as a bi-directional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable V_BR tolerance (±5 %) and low incremental surge resistance, supporting fast response to ESD and lightning-induced transients.

Rated for 175 °C maximum junction temperature and compliant with JESD 22-B106 soldering (275 °C, 10 s), it sustains repetitive 10/1000 μs surges at 0.01 % duty cycle. The device exhibits no polarity marking - consistent with bi-directional TVS construction - and meets UL 94 V-0 flammability requirements via its molded epoxy case.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry.
V_BR (min)	209 V - Minimum breakdown voltage at 1.0 mA test current; guarantees clamping activation above system operating voltage.
V_C @ I_PPM	275 V - Maximum clamped voltage during 500 W transient (10/1000 μs); determines worst-case voltage stress on downstream components.
I_PPM	1.8 A - Peak pulse current corresponding to 500 W rating; used to size PCB trace width and verify layout survivability.
I_D @ V_WM	<1.0 μA - Reverse leakage at 170 V; ensures negligible standby power loss and signal integrity in high-impedance nodes.
T_J max	175 °C - Maximum junction temperature; supports operation in under-hood automotive or industrial enclosures without derating.
AEC-Q101	Qualified - Validated for automotive applications per stress-test requirements including HTOL, TCT, and ESD-HBM/MM.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, molded epoxy case with matte tin-plated leads. No polarity marking - consistent with bi-directional functionality.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bi-directional avalanche junction	Either lead may connect to line or ground; clamping occurs identically for positive or negative transients.
Lead 1 / Lead 2	Current path terminals	Leads serve as low-inductance entry/exit points for surge current; no internal distinction - interchangeable in layout.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures tight V_BR tolerance (±5 %) and long-term stability under thermal cycling and humidity exposure.
500 W peak pulse power (10/1000 μs)	Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly decoupled, reducing need for secondary protection stages.
AEC-Q101 qualification	Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces without additional qualification effort.
UL 94 V-0 molding compound	Prevents flame propagation in enclosed systems, meeting safety requirements for industrial control cabinets and telecom equipment.
Low 1.0 μA leakage @ V_WM	Maintains signal fidelity in high-impedance analog sensor paths (e.g., thermocouple or RTD inputs) without DC offset error.

Applications

Automotive Sensor Protection	Industrial Analog I/O Protection
Use Scenario: Protecting CAN bus transceivers and LIN slave nodes from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across differential signal pair or supply rail to limit voltage excursions. Use Value: Clamps 170 V-rated lines to ≤275 V during 10/1000 μs surges, preserving transceiver integrity without adding propagation delay.	Use Scenario: Shielding 4–20 mA current-loop transmitter outputs from field-wiring induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-connected TVS across loop terminals to shunt transient energy before reaching precision DAC or op-amp output stage. Use Value: Sub-μA leakage avoids loading the loop, while 275 V clamping prevents op-amp saturation and maintains current regulation accuracy.
Telecom Line Interface	Power Supply Rail Clamp
Use Scenario: Safeguarding RS-485 transceivers on outdoor telecom node backhaul links exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bi-directional TVS placed between A/B lines and ground to suppress differential and common-mode transients simultaneously. Use Value: Symmetrical clamping ensures equal protection regardless of surge polarity, eliminating need for dual uni-directional devices.	Use Scenario: Adding secondary overvoltage protection on 24 V DC input rails of embedded controllers subjected to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-mounted clamp referenced to ground to limit rail voltage during MOSFET switch-off spikes. Use Value: 170 V V_WM allows margin above nominal 24 V, while 275 V V_C prevents downstream regulator latch-up or capacitor overvoltage.

Automotive Sensor Protection

Industrial Analog I/O Protection

Use Scenario: Protecting CAN bus transceivers and LIN slave nodes from load-dump and jump-start transients in vehicle ECUs.

IC Role / Device Role / Timing Role: Bi-directional clamping element placed across differential signal pair or supply rail to limit voltage excursions.

Use Value: Clamps 170 V-rated lines to ≤275 V during 10/1000 μs surges, preserving transceiver integrity without adding propagation delay.

Use Scenario: Shielding 4–20 mA current-loop transmitter outputs from field-wiring induced surges in factory automation PLCs.

IC Role / Device Role / Timing Role: Standoff-connected TVS across loop terminals to shunt transient energy before reaching precision DAC or op-amp output stage.

Use Value: Sub-μA leakage avoids loading the loop, while 275 V clamping prevents op-amp saturation and maintains current regulation accuracy.

Telecom Line Interface

Power Supply Rail Clamp

Use Scenario: Safeguarding RS-485 transceivers on outdoor telecom node backhaul links exposed to lightning-induced common-mode surges.

IC Role / Device Role / Timing Role: Bi-directional TVS placed between A/B lines and ground to suppress differential and common-mode transients simultaneously.

Use Value: Symmetrical clamping ensures equal protection regardless of surge polarity, eliminating need for dual uni-directional devices.

Use Scenario: Adding secondary overvoltage protection on 24 V DC input rails of embedded controllers subjected to inductive switching noise.

IC Role / Device Role / Timing Role: Standoff-mounted clamp referenced to ground to limit rail voltage during MOSFET switch-off spikes.

Use Value: 170 V V_WM allows margin above nominal 24 V, while 275 V V_C prevents downstream regulator latch-up or capacitor overvoltage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ170CA	Same 170 V V_WM, but SMA package (smaller footprint, lower thermal mass); 400 W PPPM rating vs. 500 W.	Preferred for space-constrained PCBs where 400 W surge handling suffices; less effective for high-energy 10/1000 μs events.	Select SMAJ170CA only if board area is critical and surge energy remains within 400 W limit.
1.5KE170CA	Same 170 V V_WM, DO-201 package; 1500 W PPPM rating, higher I_PPM (8.7 A), larger case size and thermal inertia.	Better suited for high-energy industrial mains-connected equipment; not AEC-Q101 qualified.	Choose 1.5KE170CA for non-automotive applications requiring higher surge margin and thermal robustness.

Compared with SA17C-E3/54, SMAJ170CA trades surge capacity for compactness, while 1.5KE170CA delivers greater energy handling in a larger, non-automotive-qualified package - making SA17C-E3/54 the optimal balance of AEC-Q101 compliance, 500 W capability, and DO-15 manufacturability.

Availability

SA17C-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial analog I/O modules, telecom line drivers, and DC power rail protection requiring stable component supply and full traceability.

Supply support for SA17C-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The SAxxC series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where bidirectional clamping and AEC-Q101 validation are mandatory.

FAQ

What is the polarity configuration of SA17C-E3/54?

The SA17C-E3/54 is a bi-directional TVS diode with no polarity marking on the DO-204AC package. Its symmetrical avalanche structure enables identical clamping performance for both positive and negative transients, allowing either lead to be connected to line or ground without functional impact. This eliminates orientation errors during automated assembly and simplifies layout for AC-coupled or floating circuits.

Does SA17C-E3/54 meet automotive qualification standards?

Yes, SA17C-E3/54 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (HBM/MM). This certification confirms its suitability for automotive applications such as engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal and electrical stress is critical.

What is the maximum clamping voltage of SA17C-E3/54 under surge conditions?

The SA17C-E3/54 has a maximum clamping voltage (V_C) of 275 V when subjected to its rated 500 W peak pulse power with a 10/1000 μs waveform. This value represents the worst-case voltage seen by protected circuitry during transient events and is measured at an I_PPM of 1.8 A, ensuring downstream components remain within safe operating limits.

How does the leakage current of SA17C-E3/54 affect high-impedance circuits?

SA17C-E3/54 exhibits ≤1.0 μA reverse leakage current at its 170 V stand-off voltage (V_WM), making it suitable for high-impedance analog circuits such as sensor front-ends or precision reference buffers. This low leakage avoids measurable DC offset or gain error in circuits with source impedances up to 10 MΩ, preserving measurement accuracy without requiring additional compensation.

Can SA17C-E3/54 be used in place of a uni-directional TVS like SA170A?

No - SA17C-E3/54 is bi-directional and lacks a cathode band, whereas SA170A is uni-directional with defined polarity. Substituting SA17C-E3/54 for SA170A in DC-biased applications may cause unintended conduction during normal operation. Use SA17C-E3/54 only where true bi-directional protection is required, such as AC signal lines or floating buses.

SA17C-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):: 17V

Voltage - Breakdown (Min):: 18.9V

Voltage - Clamping (Max) @ Ipp:: 30.5V

Current - Peak Pulse (10/1000µs):: 16.4A

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)

SA17C-E3/54 FAQ

1.How can I place an order for SA17C-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SA17C-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 SA17C-E3/54 reliable?

The price and inventory of SA17C-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 SA17C-E3/54 is usually 5 days.

3.What payment methods are accepted for SA17C-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17C-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA17C-E3/54?

SA17C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA17C-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 SA17C-E3/54?

For technical support, including SA17C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17C-E3/54 requirements.

6.How does Aetrix verify that SA17C-E3/54 is sourced from the original manufacturer or authorized distributors?

All SA17C-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 SA17C-E3/54 meets industry standards.

7.What is the process for return or replacement of SA17C-E3/54?

All SA17C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA17C-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 SA17C-E3/54 part is unused and in its original packaging.

Return procedure for SA17C-E3/54:

1.Submit a request within 90 days.

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

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