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onsemi SA9V0CA
- Part No.:
- SA9V0CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA9V0CA.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:6,547
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Product details
Overview
SA9V0CA from Fairchild Semiconductor is a 500 W bidirectional transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping ESD and surge transients in power and signal lines. It features a 9.0 V reverse stand-off voltage (VRWM), 10.0–11.1 V breakdown voltage (VBR), 15.4 V clamping voltage at 32.5 A peak pulse current (IPPM), and operates up to +175 °C junction temperature - used in DC power input protection for industrial controllers.
For engineers reviewing the SA9V0CA datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, bidirectional clamping behavior, DO-15 terminal mapping, thermal derating curves, and direct alternatives with documented VRWM/VBR/VC alignment.
Technical Context
The SA9V0CA is a glass-passivated, bipolar junction TVS diode optimized for unidirectional and bidirectional surge suppression on DC rails and low-speed data lines. Its fast response time (<5.0 ns for bidirectional mode) and low incremental surge resistance enable effective clamping of 10/1000 μs waveform transients up to 500 W.
It operates across -65 °C to +175 °C storage and junction temperature ranges, with 1.0 W steady-state power dissipation at 75 °C ambient (0.375" lead length), and supports non-repetitive forward surge currents up to 70 A per JEDEC method.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 500 W - sustains single high-energy surges without failure in telecom or industrial power inputs |
| Reverse Stand-off Voltage (VRWM) | 9.0 V - maximum continuous DC voltage before significant leakage; sets minimum system operating margin |
| Breakdown Voltage (VBR) | 10.0–11.1 V @ 1.0 mA - guaranteed conduction onset range under controlled test conditions |
| Clamping Voltage (VC) | 15.4 V @ 32.5 A IPPM - maximum voltage seen by protected circuit during worst-case surge |
| Reverse Leakage (IR) | ≤5 μA @ 9.0 V - ensures minimal standby power loss in battery-backed or low-power systems |
| Junction Temperature (TJ) | +175 °C - enables use in high-ambient environments like motor drives or enclosed power supplies |
| Package | DO-15 - industry-standard axial-leaded package with cathode band omitted (bidirectional) |
Pinout & Package
SA9V0CA uses a DO-15 axial-leaded package with no polarity marking (bidirectional operation). Both leads are electrically symmetrical; neither functions as anode or cathode in normal use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either lead connects to line or ground; identical clamping behavior in both directions |
| Lead 1 / Lead 2 | Transient current return path | Provides low-inductance path for surge current to shunt between protected line and reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under humidity and thermal cycling stress |
| Fast response time | <5.0 ns turn-on in bidirectional mode - captures sub-microsecond ESD events before IC damage |
| Low incremental surge resistance | Enables tighter VC–VBR margin - improves protection headroom versus competing TVS devices |
| 500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity requirements for industrial ports |
| Zero-cathode-band marking | Eliminates polarity installation errors in bidirectional placement - reduces assembly rework |
Applications
| Industrial PLC I/O Protection | DC Power Input Surge Suppression |
|---|---|
Use Scenario: 24 V DC digital input modules exposed to inductive switching transients and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across input terminals to clamp ±1 kV/500 A transients. Use Value: Limits voltage to ≤15.4 V during surge, protecting downstream optocouplers and microcontroller GPIOs rated for 3.3 V or 5 V logic. |
Use Scenario: 12–24 V DC power entry point on embedded gateways subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of bulk capacitor and LDO regulator. Use Value: Absorbs 500 W peak energy without degradation, maintaining <5 μA leakage to avoid battery drain in always-on systems. |
| Automotive Body Control Module (BCM) Sensors | RS-485/422 Data Line Protection |
Use Scenario: LIN bus sensor nodes connected to vehicle chassis ground with potential ground bounce and battery transients. IC Role / Device Role / Timing Role: Bidirectional TVS across LIN signal and ground to suppress ±250 V fast transients. Use Value: Clamps within 5 ns to protect transceiver ESD structures while adding <1 pF capacitance - no data rate impact at 20 kbps. |
Use Scenario: Industrial RS-485 nodes in factory automation networks subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Line-to-ground TVS on A/B differential pair to limit common-mode overvoltage. Use Value: Symmetrical 9 V VRWM ensures equal clamping on both polarities, preserving differential integrity during ±1 kV surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | DO-214AA package; 600 W rating; slightly lower VC (15.0 V @ 33.3 A); same VRWM/VBR range | Higher power density; better suited for PCB space-constrained designs with forced-air cooling | Select SMBJ9.0CA when board area is limited and thermal management allows surface-mount mounting |
| P6SMB9.0CA | Same DO-214AA package; 600 W rating; identical VRWM/VBR/VC specs; higher IR max (10 μA) | Manufactured by ON Semiconductor; qualified to AEC-Q101 for automotive use | Choose P6SMB9.0CA for automotive-grade qualification where SA9V0CA's industrial qualification is insufficient |
Compared with SA9V0CA, SMBJ9.0CA offers higher surge power in a smaller footprint but requires rework for through-hole-to-SMD transition, while P6SMB9.0CA adds AEC-Q101 compliance at the cost of higher leakage - critical for battery-sensitive automotive modules.
Availability
SA9V0CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, DC power input surge suppression, and RS-485 data line hardening requiring stable component supply and long-lifecycle support.
Supply support for SA9V0CA 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 (now part of ON Semiconductor) is a global leader in power management and protection semiconductors, known for high-reliability discrete components and analog ICs.
The SA9V0CA belongs to Fairchild's SAxxxC(A) series of 500 W axial TVS diodes, engineered specifically for robust, cost-effective transient protection in industrial and automotive power interfaces.
FAQ
What is the clamping voltage of SA9V0CA and how is it measured?
The SA9V0CA has a maximum clamping voltage (VC) of 15.4 V, measured at 32.5 A peak pulse current (IPPM) under the standardized 10/1000 μs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during a surge event, directly protecting downstream circuitry. The SA9V0CA maintains this clamping performance consistently across its full operating temperature range.
Is SA9V0CA unidirectional or bidirectional, and how does that affect circuit design?
SA9V0CA is a bidirectional TVS diode, indicated by the "CA" suffix and absence of a cathode band on the DO-15 package. It provides symmetrical clamping for both positive and negative transients, eliminating polarity concerns during placement. This makes SA9V0CA ideal for AC-coupled lines, differential buses like RS-485, or any application where voltage reversals may occur - unlike unidirectional variants such as SA9V0A.
What is the maximum steady-state power dissipation for SA9V0CA, and under what conditions?
The SA9V0CA is rated for 1.0 W steady-state power dissipation at an ambient temperature of 75 °C with 0.375-inch lead length, per JEDEC test conditions. This rating declines linearly above 75 °C, reaching zero at 175 °C junction temperature. Engineers must apply the derating curve from Figure 5 of the datasheet when designing for elevated ambient temperatures or constrained airflow.
Does SA9V0CA meet IEC 61000-4-5 surge immunity standards?
Yes, SA9V0CA's 500 W peak pulse power rating on the 10/1000 μs waveform aligns with IEC 61000-4-5 Level 4 testing (4 kV open-circuit voltage into 2 Ω source impedance), making it suitable for primary-level surge protection in industrial equipment. Its 15.4 V clamping voltage ensures protected circuits remain within safe operating limits during such events.
How does the glass passivation in SA9V0CA improve long-term reliability?
Glass passivation on the SA9V0CA's PN junction prevents moisture ingress and oxidation at the semiconductor surface, significantly improving stability of breakdown voltage (VBR) and leakage current (IR) over time and under thermal/humidity stress. This construction extends service life in harsh environments such as factory floors or outdoor enclosures where condensation or chemical exposure may occur.
SA9V0CA 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 32.5A
- 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
SA9V0CA FAQ
1.How can I place an order for SA9V0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA9V0CA 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 SA9V0CA reliable?
The price and inventory of SA9V0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA9V0CA is usually 5 days.
3.What payment methods are accepted for SA9V0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA9V0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA9V0CA?
SA9V0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA9V0CA 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 SA9V0CA?
For technical support, including SA9V0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA9V0CA requirements.
6.How does Aetrix verify that SA9V0CA is sourced from the original manufacturer or authorized distributors?
All SA9V0CA 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 SA9V0CA meets industry standards.
7.What is the process for return or replacement of SA9V0CA?
All SA9V0CA units undergo pre-shipment inspection (PSI). If there is an issue with SA9V0CA, 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 SA9V0CA part is unused and in its original packaging.
Return procedure for SA9V0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA9V0CA Tags
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