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onsemi SA90CA
- Part No.:
- SA90CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA90CA.pdf
- Description:
- TVS DIODE 90VWM 146VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:9,195
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Product details
Overview
SA90CA from Fairchild Semiconductor is a 500 W bidirectional transient voltage suppressor (TVS) in DO-15 package, designed for clamping ESD and surge events on data lines and power rails. It features a 90 V reverse stand-off voltage (VRWM), 100–111 V breakdown voltage (VBR), 146 V clamping voltage at 32.5 A peak pulse current, and operates up to +175 °C junction temperature.
For engineers reviewing the SA90CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low leakage (<3.4 µA at VRWM), fast response time (<5 ns), and compatibility with IEC 61000-4-2/4-5 surge immunity requirements in industrial and telecom interfaces.
Technical Context
The SA90CA uses a glass-passivated junction for stable avalanche performance and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
It delivers 500 W peak pulse power on the standardized 10/1000 µs waveform and maintains clamping integrity across ambient temperatures from –65 °C to +175 °C, with thermal derating above 75 °C ambient per the steady-state power curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 500 W on 10/1000 µs waveform - supports robust surge immunity per IEC 61000-4-5 Level 4 (4 kV line-to-line). |
| Reverse Stand-off Voltage | 90 V - defines maximum continuous operating voltage before clamping initiates; matches 72–90 V DC bus or AC line applications. |
| Breakdown Voltage | 100–111 V - ensures reliable avalanche conduction onset within ±5.5% tolerance at 1 mA test current. |
| Clamping Voltage | 146 V at 32.5 A IPPM - limits downstream voltage stress during surge, enabling protection of 150 V-rated components. |
| Leakage Current | <3.4 µA at 90 V - minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| Response Time | <5 ns - ensures sub-nanosecond transition from high-impedance to low-clamping state for ESD transients. |
| Junction Temperature | +175 °C - allows operation in under-hood automotive, industrial motor drives, and enclosed power supplies. |
Pinout & Package
SA90CA is housed in a DO-15 axial-leaded package with no cathode band (standard for bidirectional TVS devices). Leads are tinned and rated for 0.375" lead length at 75 °C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive half-cycle) | Conducts during positive transients; forms symmetrical clamping path with Cathode terminal. |
| Cathode | Surge current entry (negative half-cycle) | Conducts during negative transients; identical electrical behavior to Anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over 1000+ surge events and extended temperature cycling. |
| 500 W peak pulse rating | Enables single-device protection against 4 kV IEC 61000-4-5 surges on 50 Ω source impedance lines. |
| Low incremental surge resistance | Reduces clamping voltage overshoot during fast-rising transients, improving margin for downstream ICs. |
| Bidirectional symmetry | Eliminates polarity concerns in AC signal paths (e.g., RS-485, CAN, Ethernet PHYs) and simplifies layout. |
| Sub-5 ns response time | Guarantees clamping activation before ESD pulses (e.g., HBM >2 kV) damage sensitive interface circuitry. |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensors against inductive switching spikes and lightning-induced surges on 48–96 V DC bus lines. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across DC bus or between isolated control signals and ground. Use Value: Limits transient voltage to ≤146 V, preventing latch-up or oxide rupture in 100 V-rated MOSFETs and optocouplers. |
Use Scenario: Surge suppression on T1/E1 interface transformers and line-side PHYs exposed to induced surges per GR-1089-CORE. IC Role / Device Role / Timing Role: Primary-level TVS connected across secondary windings of isolation transformers. Use Value: Clamps 10/1000 µs surges up to 32.5 A while maintaining <3.4 µA leakage to avoid signal distortion on 120 Ω differential lines. |
| Automotive Body Control Modules | AC-DC Power Supply Inputs |
Use Scenario: Protection of LIN bus transceivers and sensor inputs subjected to load dump and ISO 7637-2 pulse 5a/b. IC Role / Device Role / Timing Role: Secondary-stage TVS mounted near connector entry points on 12 V supply rails. Use Value: Withstands 175 °C junction temperature and clamps 90 V stand-off transients to 146 V, preserving 16 V-rated regulators. |
Use Scenario: Input-stage surge protection for offline SMPS front-ends handling universal AC input (85–265 VAC). IC Role / Device Role / Timing Role: Parallel-connected TVS across bridge rectifier output or bulk capacitor terminals. Use Value: Absorbs 500 W surges without degradation, reducing need for series fusing or upstream MOV coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | DO-214AA package; 600 W rating; 10% lower clamping voltage (137 V @ 36.7 A); 20% smaller footprint. | Better suited for space-constrained PCBs; requires revalidation of thermal relief and creepage/clearance. | Select SMBJ90CA when board area is limited and higher surge margin (600 W) is required without changing circuit topology. |
| P6SMB90CA | Same DO-214AA package; 600 W rating; identical VBR (100–111 V); slightly higher IR (5 µA max at 90 V). | Offers broader distributor availability and longer production lifecycle; same thermal profile as SMBJ90CA. | Choose P6SMB90CA for long-term BOM stability and where leakage tolerance extends to 5 µA at VRWM. |
Compared with SA90CA, SMBJ90CA and P6SMB90CA provide higher peak power and surface-mount compatibility but require layout revision and thermal reassessment-whereas SA90CA's axial DO-15 form enables through-hole mounting with proven mechanical robustness in high-vibration environments.
Availability
SA90CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, automotive body control modules, and AC-DC power supply inputs requiring stable component supply and long-lifecycle support.
Supply support for SA90CA 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete solutions before its acquisition by ON Semiconductor in 2016; its legacy TVS portfolio remains widely deployed in industrial and automotive systems.
The SAxxCA series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing reliability under repeated surge stress, wide temperature operation, and bidirectional symmetry for AC and floating interfaces.
FAQ
What is the clamping voltage of SA90CA at its rated peak pulse current?
The SA90CA has a maximum clamping voltage (VC) of 146 V when subjected to its rated peak pulse current (IPPM) of 32.5 A on the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees predictable voltage limiting during surge events, making SA90CA suitable for protecting 150 V-rated downstream components in power and interface circuits.
Is SA90CA unidirectional or bidirectional, and how does that affect its use?
SA90CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, eliminating the need to observe polarity during placement. This makes SA90CA ideal for AC-coupled lines like RS-485, CAN, or transformer-isolated interfaces where voltage transients can swing positive or negative relative to ground.
What package type does SA90CA use, and what are its mechanical implications?
SA90CA uses the DO-15 axial-leaded package with no cathode band-standard for bidirectional TVS devices. Its 0.375" lead length rating supports 1.0 W steady-state dissipation at 75 °C ambient. The axial form provides mechanical strain relief and high vibration tolerance, making SA90CA well-suited for automotive and industrial chassis-mounted applications.
How does SA90CA perform under high-temperature operating conditions?
SA90CA is rated for an operating junction temperature up to +175 °C and includes a defined thermal derating curve. Its leakage current remains below 3.4 µA even at 90 V VRWM and elevated temperatures, and its clamping performance is maintained across the full –65 °C to +175 °C range-enabling deployment in engine compartments, power converters, and enclosed industrial enclosures.
Can SA90CA be used as a direct replacement for SA85CA or SA95CA?
No-SA90CA is not a direct replacement for SA85CA or SA95CA due to differences in reverse stand-off voltage (90 V vs. 85 V or 95 V), breakdown voltage range, and clamping behavior. Substituting requires verification of system-level surge margin and compatibility with existing PCB layout, thermal design, and protection coordination logic.
SA90CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
SA90CA FAQ
1.How can I place an order for SA90CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA90CA 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 SA90CA reliable?
The price and inventory of SA90CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA90CA is usually 5 days.
3.What payment methods are accepted for SA90CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA90CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA90CA?
SA90CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA90CA 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 SA90CA?
For technical support, including SA90CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA90CA requirements.
6.How does Aetrix verify that SA90CA is sourced from the original manufacturer or authorized distributors?
All SA90CA 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 SA90CA meets industry standards.
7.What is the process for return or replacement of SA90CA?
All SA90CA units undergo pre-shipment inspection (PSI). If there is an issue with SA90CA, 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 SA90CA part is unused and in its original packaging.
Return procedure for SA90CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA90CA Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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