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Taiwan Semiconductor Corporation SA17C
- Part No.:
- SA17C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17C.pdf
- Description:
- 500W, 21V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,431
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Product details
Overview
SA17C from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 17V working stand-off voltage (VWM), 18.9–23.1V breakdown voltage (VBR), and clamping voltage of 30.5V at 17A peak pulse current - used for ESD and surge protection in automotive lighting control modules.
For engineers reviewing the SA17C datasheet, SA17C pinout, SA17C application, or SA17C equivalent, this page delivers verified electrical parameters, polarity-sensitive terminal mapping, AEC-Q101 qualification status, junction temperature limits, and real-world clamping performance data required for robust overvoltage protection design in 12V automotive subsystems.
Technical Context
The SA17C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (18.9–23.1V at 1mA test current), clamping transients to ≤30.5V at 17A IPPM. It features low leakage (<1μA at 17V), fast response (<1.0ps from 0V to VBR), and thermal stability up to TJ = +175°C.
Designed for single-polarity surge suppression, it supports 70A non-repetitive forward surge current (IFSM), withstands 3W steady-state power at TL = 75°C on 10×10 mm copper pads, and complies with JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 18.9 / 23.1 V @ 1 mA - guaranteed avalanche initiation window under standard test conditions |
| VC @ IPPM | 30.5 V @ 17 A - clamped voltage during 10/1000μs surge, defining worst-case protected circuit stress |
| PPK | 500 W - peak pulse power handling capability per single 10/1000μs waveform |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| IR @ VWM | <1 μA - minimal leakage current ensuring negligible standby power loss in high-impedance circuits |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with cathode band marking |
Pinout & Package
DO-204AC (DO-15) package with axial leads; cathode identified by molded band. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; defines polarity-sensitive placement in PCB layout |
| Cathode | Avalanche conduction terminal / Surge shunt path | Connected to protected line (e.g., 12V rail); carries full transient current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | SA17CH - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
| Low clamping ratio (VC/VBR) | ~1.39 typical - ensures tight voltage margin between breakdown and clamping, minimizing stress on downstream ICs |
| Fast transient response | <1.0 ps rise time from 0V to VBR - enables protection of high-speed interfaces against nanosecond-scale ESD events |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - supports environmentally regulated industrial and automotive supply chains |
| High surge current tolerance | 17 A IPPM at 10/1000μs - sustains repeated load dump or inductive kick events without degradation |
Applications
| Automotive Lighting Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LED driver ICs from load-dump transients in 12V vehicle headlamp modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground, clamping spikes above 17V before they reach driver inputs. Use Value: Limits voltage excursion to ≤30.5V during 500W surges, preventing latch-up or gate oxide damage in integrated MOSFET drivers. | Use Scenario: Safeguarding analog front-end amplifiers in factory-floor pressure sensors exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Standoff protection device across sensor supply pins, activated only during >18.9V transients. Use Value: Sub-1μA leakage preserves microamp-level sensor bias accuracy; 175°C rating allows mounting near hot industrial enclosures. |
| USB Port ESD Protection | Power Supply Input Stage |
Use Scenario: Secondary-level ESD clamp on VBUS line of automotive USB-C ports subjected to ISO 10605 contact discharge. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor referenced to ground, triggered before internal port controller fails. Use Value: 1.0ps response captures early ESD edge; 30.5V clamping stays below absolute maximum ratings of common USB power switches. | Use Scenario: Input rail protection for DC-DC converters in telecom power supplies experiencing lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge shunt element placed upstream of input filter capacitors and converter ICs. Use Value: 500W peak power rating handles IEC 61000-4-5 Level 4 surges; DO-15 package enables through-hole mounting for mechanical robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A | Same DO-214AC package; lower PPK (400W), higher VC (33.2V @ 12.3A), tighter VBR tolerance (18.9–20.9V) | Preferred where board space is constrained (SMD vs axial DO-15); less suitable for high-energy load dump | Select SMAJ17A only if SMT assembly is mandatory and surge energy remains within 400W limit. |
| P6KE17A | DO-15 package identical to SA17C; same VWM/VBR range but lower PPK (600W nominal, derated to ~500W at TA=25°C), higher VC (33.2V @ 15.2A) | Legacy alternative with broader industry familiarity; slightly higher clamping voltage reduces protected circuit margin | Choose P6KE17A when cross-compatibility with existing designs or distributor stock availability is prioritized over optimal clamping performance. |
Compared with SMAJ17A and P6KE17A, the SA17C offers superior clamping voltage (30.5V vs ≥33.2V) and AEC-Q101-qualified variants (SA17CH), making it preferred for new automotive designs requiring tighter voltage margins and certified reliability.
Availability
SA17C is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, USB port ESD protection, and power supply input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for SA17C 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
Taiwan Semiconductor Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and Zener diodes for industrial and automotive markets.
The SA Series was developed specifically for high-energy transient suppression in 12V/24V automotive systems and industrial controls, emphasizing AEC-Q101 compliance, low clamping voltage, and robust thermal performance in DO-15 packaging.
FAQ
What is the breakdown voltage range for SA17C?
The SA17C has a minimum breakdown voltage (VBR) of 18.9 V and a maximum of 23.1 V, measured at 1 mA test current per ANSI/IEEE C62.35. This range ensures reliable triggering above its 17 V working stand-off voltage while accommodating process variation across production lots.
Is SA17C suitable for bidirectional transient protection?
No, SA17C is a unidirectional TVS diode intended for single-polarity surge suppression. For bidirectional protection, select SA17CA (with 'CA' suffix), which provides symmetrical clamping in both directions and uses the same DO-204AC package.
Does SA17C meet automotive reliability standards?
Yes - the SA17CH variant is AEC-Q101 qualified, undergoing stress tests including temperature cycling, high-temperature reverse bias, and ESD. The base SA17C meets all electrical and mechanical specifications but lacks formal AEC certification unless ordered with 'H' suffix.
What is the maximum clamping voltage of SA17C under surge conditions?
The SA17C clamps to a maximum of 30.5 V when subjected to a 10/1000 μs surge waveform with peak current of 17 A (IPPM). This value is guaranteed across temperature and lifetime, defining the upper voltage limit imposed on protected circuitry.
Can SA17C be used in place of P6KE17A in existing designs?
SA17C shares the same DO-204AC (DO-15) package and comparable VWM/VBR range with P6KE17A, but exhibits lower clamping voltage (30.5 V vs 33.2 V) and tighter thermal derating. Layout replacement is feasible, though system-level validation of clamping margin and surge endurance is recommended.
SA17C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 17A
- 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 FAQ
1.How can I place an order for SA17C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17C 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 reliable?
The price and inventory of SA17C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17C is usually 5 days.
3.What payment methods are accepted for SA17C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17C?
SA17C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17C 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?
For technical support, including SA17C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17C requirements.
6.How does Aetrix verify that SA17C is sourced from the original manufacturer or authorized distributors?
All SA17C 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 meets industry standards.
7.What is the process for return or replacement of SA17C?
All SA17C units undergo pre-shipment inspection (PSI). If there is an issue with SA17C, 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 part is unused and in its original packaging.
Return procedure for SA17C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA17C Tags
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