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Taiwan Semiconductor Corporation SA17AH
- Part No.:
- SA17AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17AH.pdf
- Description:
- TVS DIODE 17VWM 27.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,774
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Product details
Overview
SA17AH from Taiwan Semiconductor is an AEC-Q101-qualified 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 30.5V maximum clamping voltage (VC) at 17A peak pulse current - deployed for automotive ESD and load-dump protection in power supply rails.
For engineers reviewing the SA17AH datasheet, SA17AH pinout, SA17AH application, or SA17AH equivalent, this page delivers verified electrical parameters, clamping behavior under surge stress, thermal derating curves, AEC-Q101 qualification status, and direct alternatives for automotive-grade overvoltage protection design.
Technical Context
The SA17AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (18.9–23.1V @ 1mA), clamping transients to ≤30.5V at 17A IPPM. It features <1.0ps response time from 0V to VBR and <1μA reverse leakage above 10V.
Designed for automotive environments, it supports junction temperatures from –55°C to +175°C, meets UL 94V-0 flammability, JESD201 Class 2 whisker resistance, and pure tin-plated leads compliant with J-STD-002 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous DC or RMS operating voltage before clamping initiates |
| VBR min/max | 18.9 / 23.1 V @ 1 mA - Confirmed avalanche onset range defining turn-on threshold tolerance |
| VC @ IPPM | 30.5 V @ 17 A - Clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 500 W - Peak pulse power handling per single non-repetitive 10/1000μs waveform |
| TJ max | +175 °C - Maximum junction temperature enabling under-hood deployment without derating loss |
| IR @ VWM | <1 μA - Negligible leakage current preserving low-power standby integrity |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass and polarity band marking |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, epoxy-molded, cathode indicated by colored band; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12V rail); cathode band marks this terminal physically |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 1 & 2b load-dump transients without degradation |
| Clamping voltage ≤30.5V @ 17A | Ensures protected MCU I/O or regulator input remains below absolute maximum ratings during surge |
| Response time <1.0ps | Engages before fast ESD events (IEC 61000-4-2) propagate into sensitive circuitry |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and automotive ELV directive for sustainable manufacturing |
Applications
| Automotive Power Rail Protection | LED Lighting Driver Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to ISO 7637-2 load dump (Pulse 5a, 100V/400ms). IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and LDO input. Use Value: Limits transient voltage to ≤30.5V, preventing LDO overvoltage failure and ensuring ASIL-B compliance. | Use Scenario: Constant-current LED driver output subjected to inductive kickback from relay switching. IC Role / Device Role / Timing Role: Standoff protector across driver output terminals to absorb flyback energy. Use Value: Absorbs 500W surge without latch-up, maintaining LED string continuity and avoiding thermal shutdown. |
| Industrial Sensor Interface Protection | Automotive CAN Transceiver Protection |
Use Scenario: 24V analog sensor signal line in factory automation subject to EFT (IEC 61000-4-4, 4kV). IC Role / Device Role / Timing Role: Low-leakage (≤1μA) TVS on signal line input to precision ADC front-end. Use Value: Prevents EFT-induced offset drift or latch-up while adding negligible error (<0.001% gain impact). | Use Scenario: CAN_H/CAN_L bus lines in body control module exposed to coupled transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional SA17AH on VCC rail feeding CAN transceiver, not on data lines. Use Value: Shields transceiver power supply from supply-rail disturbances, preserving bus arbitration integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ17A | Same DO-214AC package; 17V VWM, 18.9–23.1V VBR, but 400W PPK (vs. SA17AH's 500W) | Lower surge margin limits use in high-energy load-dump scenarios (e.g., heavy-duty truck systems) | Select SMAJ17A only if system-level testing confirms 400W suffices and DO-214AC footprint is preferred |
| ON Semiconductor 1.5SMC17AH | DO-214AB package; identical 17V VWM and 500W rating, but higher VC = 33.2V @ 15.2A | Higher clamping increases risk of overvoltage stress on downstream 3.3V/5V logic powered from same rail | Prefer SA17AH where clamping voltage headroom is constrained, especially near 3.3V regulators |
Compared with SMAJ17A and 1.5SMC17AH, SA17AH uniquely combines AEC-Q101 qualification, 500W rating, and 30.5V clamping in DO-204AC - making it optimal for space-constrained, high-reliability automotive power rail protection where both surge energy and clamping tightness matter.
Availability
SA17AH is available at Aetrix Electronics and suitable for automotive ECU design, LED driver development, and industrial sensor interface projects requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SA17AH 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 Corporation (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SA Series was engineered specifically for automotive-grade transient suppression, emphasizing AEC-Q101 reliability, tight VBR tolerance, and robust 10/1000μs surge capability in legacy axial packages.
FAQ
What is the exact breakdown voltage range for SA17AH?
The SA17AH has a guaranteed breakdown voltage (VBR) range of 18.9 V to 23.1 V measured at 1 mA test current (IT), per Taiwan Semiconductor's SA Series datasheet Rev. L2105. This range defines the minimum and maximum voltage at which the device enters avalanche conduction under standardized square-wave pulse conditions, directly impacting system-level overvoltage trip margins.
Is SA17AH unidirectional or bidirectional?
SA17AH is a unidirectional TVS diode, as confirmed by its "H" suffix (AEC-Q101 qualified variant of the SA17 series) and explicit specification of forward voltage (VF = 3.5 V @ 35 A) in the Absolute Maximum Ratings table. Its cathode band marking and use case in power rail protection further confirm unidirectional operation - it conducts only during reverse overvoltage events.
Does SA17AH meet AEC-Q101 requirements?
Yes, SA17AH is explicitly AEC-Q101 qualified, as stated in the FEATURES section and ordering code documentation ("H" suffix denotes AEC-Q101 qualification). This includes validation across high-temperature operating life (HTOL), temperature cycling (TCT), and human-body-model electrostatic discharge (HBM ESD) tests required for automotive semiconductor components.
What is the maximum clamping voltage of SA17AH under surge conditions?
The SA17AH has a maximum clamping voltage (VC) of 30.5 V at 17 A peak pulse current (IPPM), tested with the standard 10/1000 μs double-exponential waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case surge events and is critical for ensuring protected ICs remain within their absolute maximum voltage ratings.
What package type does SA17AH use and what are its mechanical identifiers?
SA17AH uses the DO-204AC (DO-15) axial package, with mechanical identifiers including a molded epoxy case meeting UL 94V-0 flammability, pure tin-plated leads compliant with J-STD-002, polarity indicated by a cathode band, and approximate weight of 0.400 g. Its dimensions and lead spacing conform to JEDEC DO-204AC standards for through-hole assembly.
SA17AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 19A
- 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)
SA17AH FAQ
1.How can I place an order for SA17AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17AH 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 SA17AH reliable?
The price and inventory of SA17AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17AH is usually 5 days.
3.What payment methods are accepted for SA17AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17AH?
SA17AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17AH 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 SA17AH?
For technical support, including SA17AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17AH requirements.
6.How does Aetrix verify that SA17AH is sourced from the original manufacturer or authorized distributors?
All SA17AH 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 SA17AH meets industry standards.
7.What is the process for return or replacement of SA17AH?
All SA17AH units undergo pre-shipment inspection (PSI). If there is an issue with SA17AH, 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 SA17AH part is unused and in its original packaging.
Return procedure for SA17AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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