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Taiwan Semiconductor Corporation SA90C
- Part No.:
- SA90C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90C.pdf
- Description:
- 500W, 111V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,786
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Product details
Overview
SA90C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 90V working stand-off voltage (VWM), 100–122V breakdown voltage (VBR), and 160V maximum clamping voltage (VC) at 3.2A peak pulse current. It delivers fast response (<1.0ps), low leakage (<1μA @ 90V), and AEC-Q101 qualification for automotive-grade surge protection.
For engineers reviewing the SA90C datasheet, SA90C pinout, SA90C application, or SA90C equivalent, this device is selected for high-reliability DC power rail and signal line protection where precise 90V standoff, sub-160V clamping under 10/1000μs transients, and robust 175°C junction operation are required.
Technical Context
The SA90C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 100–122V breakdown range at 1mA test current. Its clamping action limits transient energy to ≤160V at 3.2A, enabling protection of downstream 90V-rated circuits against ISO 7637-2 pulses and EFT bursts.
Designed for single-polarity DC systems, it features pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and meets JESD201 Class 2 whisker resistance. Polarity is marked by cathode band per DO-204AC mechanical standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 100 / 122 V @ 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 160 V @ 3.2 A - Clamped voltage during 10/1000μs surge, limiting stress on protected ICs |
| PPK | 500 W - Peak pulse power handling capability per single non-repetitive transient |
| TJ max | +175 °C - Maximum junction temperature enabling under-hood automotive deployment |
| IR @ VWM | <1 μA - Negligible leakage current preserving system efficiency at rated DC bias |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass and RoHS/halogen-free compliance |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Case meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Reverse voltage input / Clamping output node | Connected to protected line (e.g., 90V supply rail); conducts avalanche current when VCK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 500W 10/1000μs surge rating | Withstands high-energy transients per ISO 7637-2 Pulse 1/2a/5a without degradation |
| <1.0ps response time | Enables protection of high-speed interfaces and microcontrollers before damage occurs |
| UL 94V-0 molding compound | Ensures flame-retardant housing integrity in enclosed or high-temperature environments |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance requirements for automotive and industrial end equipment |
Applications
| Automotive Power Rail Protection | Industrial DC Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 90V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between 90V supply and ground. Use Value: Limits transient voltage to ≤160V, preventing latch-up or gate oxide rupture in 100V-rated power management ICs. | Use Scenario: Safeguarding motor driver inputs from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Standoff protector on 90V DC bus feeding H-bridge gate drivers. Use Value: Absorbs 500W surges with <1.0ps response, eliminating need for bulkier RC snubbers or varistors. |
| LED Streetlight Power Supply Input | Telecom DC Feeder Line Protection |
Use Scenario: Shielding constant-current LED drivers from lightning-induced surges on 90V DC distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input stage before PFC controller. Use Value: Maintains <1μA leakage at 90V, minimizing standby power loss while delivering 160V clamping under 10/1000μs events. | Use Scenario: Securing remote radio unit power feeds against EFT and surge coupling from outdoor cabling. IC Role / Device Role / Timing Role: First-line transient suppressor on -48V or +90V telecom DC feed lines. Use Value: Operates reliably from -55°C to +175°C, supporting outdoor cabinet deployments without derating. |
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 SMAJ90A | Same DO-204AC package, 90V VWM, but 163V VC @ 3.2A (vs. SA90C's 160V); 1.0ps response confirmed | Identical use in 90V DC rails; slightly higher clamping may marginally reduce protection level | Select SMAJ90A if dual-sourcing across Littelfuse/TSC supply chains is required |
| ON Semiconductor 1.5SMC90A | DO-214AB (SMC) surface-mount package; 90V VWM, 163V VC @ 3.2A; not axial-leaded | Requires PCB layout change; unsuitable for through-hole designs or high-vibration environments needing axial leads | Choose 1.5SMC90A only for space-constrained SMT layouts where DO-204AC is not feasible |
Compared with SMAJ90A and 1.5SMC90A, the SA90C offers the lowest clamping voltage (160V) in axial DO-204AC form, making it optimal for legacy through-hole designs requiring maximum voltage margin below 100V system ratings.
Availability
SA90C is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial motor drive inputs, and LED streetlight power supply designs requiring stable component supply and AEC-Q101 compliance.
Supply support for SA90C 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 global automotive, industrial, and consumer markets since 1979.
The SA Series TVS diodes are engineered specifically for high-energy transient suppression in harsh-environment applications, emphasizing AEC-Q101 qualification, tight VBR tolerance, and consistent clamping performance across temperature.
FAQ
What is the exact breakdown voltage range for SA90C?
The SA90C has a minimum breakdown voltage (VBR) of 100 V and a maximum of 122 V, measured at 1 mA test current per ANSI/IEEE C62.35. This range ensures reliable triggering above its 90 V working stand-off voltage while maintaining design margin against false triggering during normal operation.
Is SA90C unidirectional or bidirectional?
The SA90C is a unidirectional TVS diode, indicated by its "C" suffix and cathode band marking. It conducts only in reverse bias above VBR and must be installed with cathode toward the protected line. Bidirectional variants in the SA series use "CA" suffix (e.g., SA90CA).
Does SA90C meet AEC-Q101 reliability standards?
Yes, SA90C is AEC-Q101 qualified, as confirmed in the SA Series datasheet Version L2105. This qualification covers stress tests including HTGB, AC/H3TRB, TC, UHAST, and mechanical shock, validating its suitability for automotive under-hood and chassis applications.
What is the maximum clamping voltage of SA90C under surge conditions?
The SA90C clamps to a maximum of 160 V when subjected to its rated 3.2 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry.
Can SA90C be used in place of SA90A?
No - SA90C and SA90A are distinct variants: SA90C has VBR = 100–122 V, while SA90A has tighter VBR = 100–111 V. The "A" suffix denotes enhanced VBR uniformity, not compatibility. Substituting SA90C for SA90A may result in higher clamping or inconsistent turn-on behavior in precision-sensitive designs.
SA90C 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 160V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- 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)
SA90C FAQ
1.How can I place an order for SA90C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90C 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 SA90C reliable?
The price and inventory of SA90C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90C is usually 5 days.
3.What payment methods are accepted for SA90C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90C?
SA90C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90C 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 SA90C?
For technical support, including SA90C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90C requirements.
6.How does Aetrix verify that SA90C is sourced from the original manufacturer or authorized distributors?
All SA90C 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 SA90C meets industry standards.
7.What is the process for return or replacement of SA90C?
All SA90C units undergo pre-shipment inspection (PSI). If there is an issue with SA90C, 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 SA90C part is unused and in its original packaging.
Return procedure for SA90C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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