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Vishay General Semiconductor - Diodes Division SA17C-E3/73
- Part No.:
- SA17C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17C-E3/73.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,627
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Product details
Overview
SA17C-E3/73 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 170 V stand-off voltage (VWM), 209 V minimum breakdown voltage (VBR), 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-E3/73 datasheet, SA17C-E3/73 pinout, SA17C-E3/73 application, or SA17C-E3/73 equivalent, this device serves as a robust, RoHS-compliant transient protection solution for DC bus lines, sensor interfaces, and industrial I/O where bidirectional surge immunity up to ±275 V is required under IEC 61000-4-5 Level 4 conditions.
Technical Context
The SA17C-E3/73 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 constraints. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, critical for consistent clamping across repetitive transients.
Designed for 10/1000 µs waveform compliance, it delivers 1.8 A peak pulse current (IPPM) while maintaining clamping voltage ≤275 V - a key parameter for safeguarding downstream MOSFET gates or microcontroller I/O pins rated to 200 V absolute maximum. Junction temperature range spans −55 °C to +175 °C, supporting under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before conduction; defines safe DC/AC RMS working limit on protected line. |
| VBR (min) | 209 V - Minimum breakdown voltage at 1 mA test current; guarantees clamping initiates no earlier than 209 V in either direction. |
| VC @ IPPM | 275 V - Maximum clamped voltage at 1.8 A peak pulse; determines worst-case overvoltage seen by protected IC during surge. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs); enables survivability of 1 kV/500 A surges per IEC 61000-4-5. |
| IPPM | 1.8 A - Peak pulse current corresponding to VC = 275 V; used to size series impedance for energy limiting. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in high-ambient environments like engine control units. |
| AEC-Q101 | Qualified - Validated for automotive applications including temperature cycling, HTRB, and ESD testing per stress test plan. |
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 standards. Bi-directional construction means no polarity marking - terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both ends serve as interchangeable avalanche junction terminals; no cathode band - enables blind-mount installation on PCB. |
| Lead 1 / Lead 2 | Connection interface | Leads provide mechanical anchoring and thermal conduction path to PCB copper; 0.375" (9.5 mm) lead length specified for derating curves. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures tight VBR tolerance (±5 %) and long-term stability under thermal cycling and humidity exposure. |
| 500 W peak pulse rating (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to Level 4 (4 kV line-to-earth, 2 kV line-to-line) when paired with appropriate series impedance. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring extended lifetime and stress resilience. |
| Bi-directional symmetry | Eliminates need for polarity-aware layout; protects AC signals, differential buses (e.g., RS-485), and ungrounded sensors without orientation checks. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes let-through voltage during surge events - critical for protecting 200 V-rated MOSFETs or isolated gate drivers. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protection of 24 V DC power rails feeding ECUs, lighting modules, and actuators against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and LDOs to limit input overvoltage. Use Value: Withstands 120 V/100 ms load dump pulses and clamps induced transients to ≤275 V, preserving downstream regulator integrity. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) shunt protector on twisted-pair sensor lines, placed adjacent to connector entry point. Use Value: Bi-directional response captures both positive and negative fast transients (IEC 61000-4-2 ±8 kV contact), preventing ADC saturation or op-amp latch-up. |
| Telecom Line Card Protection | Motor Drive Control Signal Lines |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE-powered devices against lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Secondary-level TVS on MDI pairs, coordinated with gas discharge tubes (GDTs) for staged protection. Use Value: Fast response (<1 ns) and 275 V clamping prevent damage to magnetics and PHY ICs during 10/700 µs telecom surges. |
Use Scenario: Protecting isolated gate driver inputs (e.g., 6N137, Si82xx) from Miller-induced transients during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Localized clamp on logic-level control traces between MCU and driver IC, minimizing loop inductance. Use Value: Limits voltage overshoot to <275 V during dV/dt events, avoiding false triggering or destruction of optocoupler inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | Same VWM (170 V), higher PPPM (600 W), SMA package (smaller footprint, lower thermal mass). | Better suited for space-constrained PCBs but requires tighter layout for thermal management due to smaller case. | Select SMBJ170CA when board area is limited and peak surge duty cycle remains low (≤0.01 %). |
| 1.5KE170CA | Same VWM (170 V), higher PPPM (1500 W), DO-201AD package (larger, higher thermal inertia). | Preferred for high-energy, infrequent surges (e.g., lightning protection) where sustained power dissipation matters more than speed. | Choose 1.5KE170CA for primary-level protection in outdoor equipment or power supply front-ends with >1 kA surge requirements. |
Compared with SMBJ170CA and 1.5KE170CA, SA17C-E3/73 offers balanced surge capability (500 W), proven AEC-Q101 reliability in DO-15, and cost-effective through-hole assembly - making it optimal for mid-tier automotive and industrial control boards where manufacturability and qualification are prioritized over extreme power or miniaturization.
Availability
SA17C-E3/73 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom line card protection, and motor drive control signal lines requiring stable component supply and AEC-Q101 assurance.
Supply support for SA17C-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 qualification for harsh environments.
The SAxxC series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, bidirectional transient suppression in automotive, industrial, and telecom infrastructure where failure modes must be mitigated without adding complexity.
FAQ
What is the polarity configuration of SA17C-E3/73?
The SA17C-E3/73 is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode marking or polarity designation - both leads are electrically identical. This allows flexible placement on PCBs without orientation verification, especially useful for AC-coupled or floating signal lines where polarity reversal may occur during surge events.
Does SA17C-E3/73 meet automotive qualification standards?
Yes, SA17C-E3/73 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per the AEC-Q101-004 standard. This qualification confirms its suitability for automotive applications such as body control modules, power distribution units, and sensor nodes operating in under-hood or cabin environments.
What is the maximum clamping voltage of SA17C-E3/73 at its rated peak pulse current?
The SA17C-E3/73 exhibits a maximum clamping voltage (VC) of 275 V at its rated peak pulse current (IPPM) of 1.8 A under the standard 10/1000 µs waveform. This value is measured per Figure 7–10 in the Vishay datasheet 88378 and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event.
Can SA17C-E3/73 be used in place of a unidirectional TVS like SA170A?
No - SA17C-E3/73 is bi-directional and lacks polarity marking, whereas SA170A is unidirectional with a defined cathode band. Substituting them requires verifying system-level polarity constraints: SA17C-E3/73 is appropriate for AC or floating lines, while SA170A suits DC-biased circuits where reverse conduction must be blocked. Their VBR and VC values differ slightly due to structural asymmetry.
What package type does SA17C-E3/73 use and what are its mechanical highlights?
SA17C-E3/73 uses the DO-204AC (DO-15) axial package: 1.0 inch (25.4 mm) minimum lead length, 0.140 inch (3.6 mm) maximum body diameter, and UL 94 V-0 rated epoxy molding compound. Its matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 1A whisker resistance, ensuring reliable through-hole assembly and long-term interconnect integrity.
SA17C-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:
- -
- 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-E3/73 FAQ
1.How can I place an order for SA17C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17C-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 SA17C-E3/73 reliable?
The price and inventory of SA17C-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 SA17C-E3/73 is usually 5 days.
3.What payment methods are accepted for SA17C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17C-E3/73?
SA17C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17C-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 SA17C-E3/73?
For technical support, including SA17C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17C-E3/73 requirements.
6.How does Aetrix verify that SA17C-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA17C-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 SA17C-E3/73 meets industry standards.
7.What is the process for return or replacement of SA17C-E3/73?
All SA17C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA17C-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 SA17C-E3/73 part is unused and in its original packaging.
Return procedure for SA17C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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