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Vishay General Semiconductor - Diodes Division SA17CHE3/73
- Part No.:
- SA17CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17CHE3/73.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,315
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Product details
Overview
SA17CHE3/73 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 1.8 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA17CHE3/73 datasheet, SA17CHE3/73 pinout, SA17CHE3/73 application, or SA17CHE3/73 equivalent, this page delivers verified electrical specs, package dimensions, clamping behavior under surge, thermal derating curves, and validated alternatives for ESD and lightning transient protection in automotive ECUs and industrial sensor interfaces.
Technical Context
The SA17CHE3/73 operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 170 V) across -55 °C to +175 °C operating range.
It delivers 500 W peak pulse power per 10/1000 μs waveform with 0.01 % duty cycle, and exhibits low incremental surge resistance - critical for limiting let-through energy during fast transients such as ISO 7637-2 pulse 1/2a/5a or IEC 61000-4-5 surges. Clamping voltage remains tightly controlled at 275 V up to 1.8 A peak pulse current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for 24 V/48 V automotive bus or industrial DC lines. |
| VBR (min) | 209 V - Minimum breakdown voltage at 1 mA test current; guarantees clamping activation above system nominal voltage with margin. |
| VC @ IPPM | 275 V - Clamping voltage at 1.8 A peak pulse current (10/1000 μs); determines maximum let-through voltage seen by protected ICs. |
| PPPM | 500 W - Peak pulse power handling capability; supports robust immunity against repetitive transients like load dump or inductive switching. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | DO-204AC (DO-15) - Standard axial-leaded through-hole package with UL 94 V-0 molded epoxy; compatible with legacy PCB layouts and wave soldering. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JEDEC standards. |
Pinout & Package
SA17CHE3/73 uses a bi-directional DO-204AC (DO-15) package with no polarity marking - both leads are electrically symmetric. The device has two terminals: anode and cathode are interchangeable due to bidirectional conduction; no color band or marking is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetric) | Bi-directional avalanche junction terminal | Either lead may connect to line or ground; enables placement flexibility in AC or differential signal protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR over lifetime and temperature; eliminates risk of metallization migration under surge stress. |
| 500 W peak pulse power (10/1000 μs) | Supports EN 61000-4-5 Level 4 (4 kV) surge testing on 2 Ω source impedance with margin. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules requiring zero field failure in harsh environments. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream MOSFETs or CAN transceivers during transient events. |
| Matte tin-plated leads, J-STD-002 compliant | Enables reliable solder wetting in automated assembly; meets IPC-A-610 Class 2/3 requirements. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and microcontroller I/O from load dump and jump-start transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bi-directional TVS placed between signal line and chassis ground to clamp ±100 V transients within nanoseconds. Use Value: Limits voltage seen by transceiver ICs to ≤275 V, preventing latch-up or gate oxide damage while maintaining signal integrity. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485) of PLC modules exposed to motor drive noise and EFT bursts. IC Role / Device Role / Timing Role: Standoff protector on field-side signal lines, absorbing 500 W surges without degradation over 10⁵ events. Use Value: Eliminates need for external series impedance or RC filtering, reducing BOM count and board space in DIN-rail mounted controllers. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control |
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors subjected to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary clamping device across differential pairs, operating symmetrically to preserve common-mode rejection. Use Value: Maintains <1 pF capacitance at 0 V bias (per family data), avoiding signal distortion at 100 Mbps+ data rates. |
Use Scenario: Suppressing commutation spikes from universal motors in washing machines and HVAC blowers connected to MCU-based triac drivers. IC Role / Device Role / Timing Role: Across-mains or across-triac snubber element, clamping 170 V transients generated during zero-cross switching. Use Value: Extends triac lifetime by reducing dv/dt stress and prevents false triggering of zero-cross detection circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CA | Same VWM (170 V), same DO-214AC package, but lower PPPM (400 W) and higher VC (277 V at 1.5 A). | Limited to lower-energy transients; not rated for AEC-Q101; suitable for commercial-grade consumer electronics only. | Select SMAJ170CA only when cost sensitivity outweighs automotive qualification and 500 W headroom requirements. |
| 1.5KE170CA | Higher PPPM (1500 W), larger DO-204AL (DO-27) package, same VWM and bi-directionality, but 2× footprint area and 3× weight. | Used where higher surge margin is required (e.g., outdoor telecom cabinets), but incompatible with DO-15 PCB footprints. | Choose 1.5KE170CA only if layout allows larger package and system-level testing demands >500 W pulse handling. |
Compared with SMAJ170CA and 1.5KE170CA, SA17CHE3/73 uniquely balances AEC-Q101 qualification, DO-15 footprint compatibility, and full 500 W rating - making it the optimal choice for space-constrained automotive and industrial designs requiring certified reliability.
Availability
SA17CHE3/73 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom line cards, and appliance motor drive modules requiring stable component supply and long-term lifecycle assurance.
Supply support for SA17CHE3/73 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxCH series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and precise clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of SA17CHE3/73 and at what current is it specified?
The SA17CHE3/73 has a maximum clamping voltage (VC) of 275 V, measured at a peak pulse current (IPPM) of 1.8 A using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and reflects worst-case let-through voltage during surge events, ensuring downstream components remain within safe voltage limits.
Is SA17CHE3/73 suitable for automotive applications, and what qualification does it hold?
Yes, SA17CHE3/73 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and surge endurance required for automotive powertrain, body electronics, and ADAS systems. Its DO-204AC package and 175 °C TJ max further support under-hood deployment.
Does SA17CHE3/73 have polarity markings, and how should it be oriented on the PCB?
No, SA17CHE3/73 is a bi-directional TVS diode with no polarity marking - both leads are functionally identical. It can be mounted in either orientation on the PCB, simplifying layout and eliminating risk of reverse installation during assembly.
What is the leakage current specification for SA17CHE3/73 at its stand-off voltage?
At the rated stand-off voltage (VWM) of 170 V and TA = 25 °C, SA17CHE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage ensures minimal power loss and avoids interference with high-impedance sensor or communication circuits.
Can SA17CHE3/73 replace SA170A in a design, and what is the key functional difference?
No - SA17CHE3/73 is bi-directional (suffix "CA"), while SA170A is uni-directional (suffix "A"). Replacing SA170A with SA17CHE3/73 removes polarity constraints but increases forward voltage drop during normal conduction; SA17CHE3/73 must only be used where bidirectional clamping is required, such as AC lines or floating interfaces.
SA17CHE3/73 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA17CHE3/73 FAQ
1.How can I place an order for SA17CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17CHE3/73 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 SA17CHE3/73 reliable?
The price and inventory of SA17CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA17CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17CHE3/73?
SA17CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17CHE3/73 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 SA17CHE3/73?
For technical support, including SA17CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17CHE3/73 requirements.
6.How does Aetrix verify that SA17CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA17CHE3/73 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 SA17CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA17CHE3/73?
All SA17CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA17CHE3/73, 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 SA17CHE3/73 part is unused and in its original packaging.
Return procedure for SA17CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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