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Taiwan Semiconductor Corporation SA17H
- Part No.:
- SA17H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17H.pdf
- Description:
- 500W, 21V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,674
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Product details
Overview
SA17H from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 17V working stand-off voltage (VWM), and clamps transients to ≤30.5V at 17A peak pulse current. It delivers fast response (<1.0ps), low leakage (<1μA @ 17V), and operates from –55°C to +175°C - ideal for automotive ECU power rail protection.
For engineers reviewing the SA17H datasheet, SA17H pinout, SA17H application, or SA17H equivalent, this page provides verified electrical parameters, DO-15 terminal polarity mapping, automotive-grade reliability data, clamping performance under IEC 61000-4-5 surge conditions, and direct alternatives with validated VWM/VBR/IPPM/VC trade-offs.
Technical Context
The SA17H is a silicon avalanche diode designed for unidirectional transient suppression on DC power lines and signal paths. Its breakdown voltage (VBR) is specified at 18.9–23.1V @ 1mA test current, with a maximum clamping voltage (VC) of 30.5V at 17A IPPM - ensuring robust overvoltage limiting during ISO 7637-2 pulse 1/2a/5a events.
It features low dynamic impedance and a temperature coefficient of 20 mV/°C for VBR, enabling stable clamping across automotive temperature ranges. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with pure tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets minimum system operating margin before clamping. |
| VBR min/max | 18.9 / 23.1 V @ 1 mA - Confirmed avalanche onset range; ensures reliable turn-on above VWM with design guardband. |
| VC @ IPPM | 30.5 V @ 17 A - Clamped voltage during 10/1000μs surge; defines worst-case stress on downstream ICs. |
| PPK | 500 W - Peak pulse power rating per IEC 61000-4-5; validates immunity to 1kV/2kV line-to-ground surges. |
| IR @ VWM | <1 μA - Reverse leakage at 17V; negligible power loss and signal interference in standby or low-power modes. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating. |
| Response time | <1.0 ps - Time from 0V to VBR; enables sub-nanosecond suppression of ESD and fast transients. |
Pinout & Package
SA17H uses the DO-204AC (DO-15) axial-leaded package with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Weight: 0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC input / protected line side | Connected to power source or signal line upstream of load; carries surge current into cathode during clamping. |
| Cathode | Ground reference / return path | Connected to system ground or low-impedance return; establishes clamping voltage relative to reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS modules per stress test requirements. |
| 500W 10/1000μs surge rating | Withstands repetitive ISO 7637-2 Pulse 5a (50Ω/2Ω coupled) without degradation or parametric shift. |
| Clamping voltage ≤30.5V @ 17A | Protects 24V automotive ICs (e.g., CAN transceivers, microcontrollers) with ≥5V headroom below absolute max ratings. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained supply chains. |
| UL 94V-0 molding compound | Prevents flame propagation in high-energy fault conditions - critical for under-dash and battery-connected systems. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Primary overvoltage clamp on main power input, placed before DC-DC converters and MCU power supplies. Use Value: Limits transient voltage to ≤30.5V, preserving 3.3V/5V regulator input integrity and preventing latch-up in automotive microcontrollers. | Use Scenario: 4–20mA current loop transmitters interfacing with PLC analog inputs in factory automation. IC Role / Device Role: Input-side TVS on sensor signal line to absorb EFT bursts (IEC 61000-4-4) and induced surges from nearby motor switching. Use Value: Maintains signal fidelity by suppressing transients before precision op-amps and ADC front-ends, with <1μA leakage avoiding loop current error. |
| LED Lighting Driver Protection | Automotive CAN Bus Node Protection |
Use Scenario: Constant-current LED drivers in vehicle exterior lighting subjected to inductive kickback from relay-controlled loads. IC Role / Device Role: Parallel clamp across driver output to absorb reverse EMF from solenoid or relay coils. Use Value: Prevents MOSFET or controller failure by diverting >17A surge current away from sensitive switching elements. | Use Scenario: CAN H/L lines in infotainment or gateway modules exposed to ESD (IEC 61000-4-2) and conducted noise. IC Role / Device Role: Unidirectional TVS on CAN power rail (VCC) to protect transceiver bias circuitry from supply-line transients. Use Value: Ensures CAN communication continuity by clamping supply spikes before they disrupt transceiver operation or cause bus-off states. |
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 | VWM = 17V, VC = 27.7V @ 19A, DO-214AC package, non-AEC-Q101 | Higher IPPM (19A vs. 17A) but lacks automotive qualification; lower clamping voltage improves margin for 3.3V logic rails. | Select SMAJ17A for cost-sensitive industrial designs where AEC-Q101 is not required and lower VC is prioritized. |
| P6SMB17A | VWM = 17V, VC = 27.7V @ 19A, DO-214AA package, AEC-Q101 qualified | Same clamping performance and qualification level, but larger DO-214AA footprint requires PCB layout change. | Choose P6SMB17A when higher thermal mass or legacy board compatibility with SMB packages is needed. |
Compared with SA17H, SMAJ17A offers tighter clamping and higher surge current but no automotive qualification, while P6SMB17A matches AEC-Q101 compliance and VC performance but requires DO-214AA footprint adaptation - making SA17H optimal for new DO-15-based automotive designs requiring space-constrained, qualified protection.
Availability
SA17H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED lighting drivers, and CAN bus power rail protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SA17H 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SA Series was developed specifically for high-reliability transient suppression in harsh environments - emphasizing AEC-Q101 compliance, tight VBR tolerances, and robust 10/1000μs surge handling for automotive power systems.
FAQ
What is the breakdown voltage range for SA17H?
The SA17H 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 consistent clamping behavior across production lots while maintaining safe margin above its 17 V working stand-off voltage. The SA17H's VBR specification directly supports design validation against ISO 7637-2 load dump thresholds.
Is SA17H suitable for bidirectional transient protection?
No, SA17H is a unidirectional TVS diode intended for DC power line protection where polarity is fixed. Bidirectional protection requires an SA17H-equivalent part with "CA" suffix (e.g., SA17CA), which exhibits symmetric clamping in both directions. Using SA17H on AC or floating signals risks forward conduction and failure; always verify polarity alignment in schematic implementation of SA17H.
What packaging options are available for SA17H?
SA17H is supplied in tape-and-reel format: 3,500 units per reel. The DO-204AC (DO-15) package uses axial leads with cathode band marking, pure tin plating per J-STD-002, and complies with UL 94V-0 flammability standards. No ammo box or bulk packaging is offered for the "H" (AEC-Q101) variant - only tape-and-reel ensures traceability and handling integrity for automotive production.
How does SA17H perform under high-temperature operating conditions?
SA17H is rated for continuous operation from –55°C to +175°C junction temperature, with derated peak pulse power above 25°C per Fig.2 in the datasheet. At 125°C ambient, its 500W surge capability reduces to ~350W, yet clamping voltage remains stable due to its 20 mV/°C VBR temperature coefficient. This makes SA17H suitable for under-hood automotive locations where thermal management is constrained.
Does SA17H meet industry standards for automotive ESD and surge immunity?
Yes, SA17H is AEC-Q101 qualified and designed to meet key automotive immunity standards: it suppresses IEC 61000-4-2 ESD (±25 kV air, ±20 kV contact), IEC 61000-4-4 EFT (40 A, 5/50 ns), and ISO 7637-2 Pulse 1/2a/5a transients. Its 30.5V clamping at 17A ensures protected circuits remain within safe operating area during 12V/24V system surges - a requirement verified in TSC's AEC-Q101 stress testing protocol.
SA17H 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:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 17A
- 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)
SA17H FAQ
1.How can I place an order for SA17H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17H 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 SA17H reliable?
The price and inventory of SA17H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17H is usually 5 days.
3.What payment methods are accepted for SA17H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17H?
SA17H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17H 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 SA17H?
For technical support, including SA17H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17H requirements.
6.How does Aetrix verify that SA17H is sourced from the original manufacturer or authorized distributors?
All SA17H 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 SA17H meets industry standards.
7.What is the process for return or replacement of SA17H?
All SA17H units undergo pre-shipment inspection (PSI). If there is an issue with SA17H, 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 SA17H part is unused and in its original packaging.
Return procedure for SA17H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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