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Taiwan Semiconductor Corporation SA9.0A
- Part No.:
- SA9.0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA9.0A.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,096
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Product details
Overview
SA9.0A 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 9.0V working stand-off voltage, 10.0–11.1V breakdown voltage at 1mA test current, and 15.4V maximum clamping voltage at 34A peak pulse current. It protects automotive and industrial power rails against ESD and inductive switching transients.
For engineers reviewing the SA9.0A datasheet, SA9.0A pinout, SA9.0A application, or SA9.0A equivalent, this page delivers verified electrical parameters, clamping behavior under surge conditions, thermal derating curves, AEC-Q101 qualification status, and direct alternatives with documented VWM, VC, and IPPM differences.
Technical Context
The SA9.0A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 10.0–11.1V breakdown range. Its low 15.4V clamping voltage at 34A ensures downstream ICs see minimal overvoltage during 10/1000μs transients. It exhibits <1μA reverse leakage above 10V and a 9mV/°C temperature coefficient of VBR.
Designed for surface-mount or through-hole PCB assembly in DO-204AC (DO-15), it supports junction temperatures from –55°C to +175°C and handles 70A non-repetitive forward surge current. Its fast response time (<1.0ps from 0V to VBR) enables protection of high-speed logic and microcontroller I/O lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system rail compatibility. |
| VBR @ IT=1mA | 10.0–11.1 V - Breakdown voltage range defining turn-on threshold; tight tolerance enables predictable clamping onset. |
| VC @ IPPM=34A | 15.4 V - Clamped voltage during 10/1000μs surge; limits stress on protected 5V–12V logic and MCU peripherals. |
| PPK | 500 W - Peak pulse power handling per 10/1000μs waveform; qualifies for IEC 61000-4-5 Level 3 surge immunity. |
| IR @ VWM | <5 μA - Reverse leakage at 9.0V; negligible power loss and signal integrity impact in standby or low-power modes. |
| TJMAX | +175 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial deployments. |
| Package | DO-204AC (DO-15) - Standard axial-leaded TVS package with tin-plated leads; compatible with wave and reflow soldering per J-STD-002. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential node; defines unidirectional conduction path from cathode to anode during clamping. |
| Cathode | Reverse voltage input / protected line connection | Connected to the line being protected (e.g., 9V supply rail); conducts avalanche current to anode when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available (SA9.0AH) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, and UHAST. |
| 500W peak pulse power (10/1000μs) | Withstands repeated 500W surges without degradation-meets IEC 61000-4-5 surge immunity for industrial control inputs. |
| Clamping voltage ≤15.4V at 34A | Ensures protected 12V logic remains below absolute maximum ratings during worst-case transients (e.g., load dump). |
| Fast response time <1.0ps | Activates before transient energy couples into sensitive circuitry-critical for protecting CAN, LIN, and sensor interfaces. |
| RoHS and halogen-free (IEC 61249-2-21) | Complies with environmental directives for global OEM production and end-of-life recycling requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12V battery-supplied ECUs exposed to load dump and jump-start transients up to ±100V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and LDO input to limit voltage seen by regulator. Use Value: SA9.0A clamps to 15.4V at 34A, preventing LDO overvoltage failure while maintaining <5μA leakage during normal operation. |
Use Scenario: 4–20mA current loop transmitters interfacing with PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: TVS placed across loop terminals to absorb EFT bursts and lightning-induced surges. Use Value: With 9.0V VWM, SA9.0A remains inactive during normal 24V loop operation but triggers within 1ps to clamp 1kV/50Ω transients. |
| LED Driver Input Protection | Microcontroller I/O Line Protection |
|
Use Scenario: Constant-current LED drivers powered from 9–12V DC supplies in outdoor signage subject to induced surges. IC Role / Device Role / Timing Role: SA9.0A installed at driver input to shunt surge energy away from MOSFET gate drivers and current-sense amplifiers. Use Value: 500W rating absorbs multi-pulse surge events without thermal runaway; DO-15 package allows high-current trace routing. |
Use Scenario: GPIO pins of automotive-grade MCUs connected to external switches, buttons, or sensors in harsh environments. IC Role / Device Role / Timing Role: SA9.0A placed in series with pull-up/pull-down resistors to clamp ESD strikes before reaching MCU ESD structures. Use Value: Sub-1ps response ensures clamping initiates before internal MCU protection diodes conduct, reducing latch-up risk. |
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 SMAJ9.0A | VWM = 9.0V, VC = 14.4V @ 35.3A, PPK = 400W, DO-214AC package | Lower peak power rating and smaller package footprint; less thermal mass for sustained surge duty. | Prefer for space-constrained designs where 400W suffices and board area is limited. |
| ON Semiconductor 1.5SMC9.0A | VWM = 9.0V, VC = 15.0V @ 33.3A, PPK = 1500W, DO-214AB package | Higher surge rating and larger SMC package; requires more PCB area and higher mounting torque. | Choose when system-level surge testing exceeds 500W or long-duration transients demand higher thermal capacity. |
Compared with SMAJ9.0A and 1.5SMC9.0A, the SA9.0A offers balanced 500W capability in the widely adopted DO-15 form factor-ideal for legacy automotive and industrial designs requiring proven reliability, AEC-Q101 availability, and straightforward replacement of existing DO-15 TVS devices without layout change.
Availability
SA9.0A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver input safeguarding, and microcontroller I/O line ESD suppression requiring stable component supply across extended production lifecycles.
Supply support for SA9.0A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The SA Series TVS diodes are engineered for robust transient immunity in harsh environments-designed specifically for automotive subsystems, industrial controls, and power supply front-ends where reliability under surge, temperature, and vibration stress is critical.
FAQ
What is the clamping voltage of SA9.0A at its rated peak pulse current?
The SA9.0A has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 34 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during surge events. The SA9.0A datasheet confirms this parameter at TA = 25°C with no derating applied.
Is SA9.0A unidirectional or bidirectional, and how is polarity marked?
The SA9.0A is a unidirectional TVS diode, intended for DC rail protection where reverse conduction is not required. Polarity is marked by a cathode band on the DO-204AC (DO-15) package body-this band identifies the cathode terminal, which must be connected toward the protected line (e.g., 9V supply), while the anode connects to ground. Bidirectional variants use "CA" suffixes (e.g., SA9.0CA), not "A".
Does SA9.0A meet AEC-Q101 qualification, and what does the "A" suffix indicate?
The "A" suffix in SA9.0A denotes tighter parameter tolerances (e.g., narrower VBR range of 10.0–11.1 V vs. 10.0–12.2 V for SA9.0), not AEC-Q101 qualification. AEC-Q101 compliance requires the "H" suffix (e.g., SA9.0AH). SA9.0A itself is not AEC-Q101 qualified unless explicitly ordered as SA9.0AH-this distinction is confirmed in TSC's Ordering Information table and Version L2105 documentation.
What is the maximum junction temperature and thermal derating behavior of SA9.0A?
The SA9.0A has a maximum junction temperature (TJMAX) of +175°C and operates from –55°C to +175°C. Its peak pulse power rating derates linearly above TA = 25°C per Figure 2 in the datasheet: at 100°C ambient, PPK reduces to approximately 350W. This derating curve ensures safe operation in under-hood or enclosed industrial enclosures without forced cooling.
How does SA9.0A compare to SA9.0 in terms of electrical performance and reliability?
The SA9.0A improves upon the base SA9.0 with tighter VBR tolerance (10.0–11.1 V vs. 10.0–12.2 V), lower clamping voltage (15.4 V vs. 16.9 V at same IPPM), and reduced leakage (5 μA vs. 10 μA at VWM). These enhancements yield more consistent surge response and lower standby power loss. Both share identical DO-204AC packaging, thermal ratings, and mechanical construction-making SA9.0A a drop-in upgrade where tighter specs are required.
SA9.0A 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
SA9.0A FAQ
1.How can I place an order for SA9.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA9.0A 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 SA9.0A reliable?
The price and inventory of SA9.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA9.0A is usually 5 days.
3.What payment methods are accepted for SA9.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA9.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA9.0A?
SA9.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA9.0A 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 SA9.0A?
For technical support, including SA9.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA9.0A requirements.
6.How does Aetrix verify that SA9.0A is sourced from the original manufacturer or authorized distributors?
All SA9.0A 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 SA9.0A meets industry standards.
7.What is the process for return or replacement of SA9.0A?
All SA9.0A units undergo pre-shipment inspection (PSI). If there is an issue with SA9.0A, 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 SA9.0A part is unused and in its original packaging.
Return procedure for SA9.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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