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onsemi SA10A
- Part No.:
- SA10A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA10A.pdf
- Description:
- TVS DIODE 10VWM 17VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:6,492
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Product details
Overview
SA10A from Fairchild Semiconductor is a unidirectional 500 W transient voltage suppressor (TVS) diode in DO-15 package, with 10 V reverse stand-off voltage (VRWM), 11.1–12.3 V breakdown voltage (VBR), 17.0 V clamping voltage at peak pulse current, and 29.4 A IPPM on 10/1000 μs waveform - used for primary overvoltage protection in DC power inputs of industrial controllers.
For engineers reviewing the SA10A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 500 W surge, low leakage (<1 μA at VRWM), sub-nanosecond response time, and DO-15 through-hole compatibility with legacy PCB layouts.
Technical Context
The SA10A employs a glass-passivated junction for stable avalanche behavior and low incremental surge resistance. Its unidirectional architecture provides asymmetric conduction: forward-biased operation supports surge shunting to ground while blocking reverse leakage below 10 V.
Designed for 10/1000 μs standard surge waveforms per R.E.A., it delivers consistent clamping at 17.0 V up to 29.4 A peak pulse current, with junction temperature rated to +175°C and storage range from –65°C to +175°C - enabling use in high-ambient industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 500 W on 10/1000 μs waveform - sustains single-event lightning-induced surges without degradation |
| Clamping Voltage VC | 17.0 V @ IPPM - limits downstream IC voltage stress during transients |
| Breakdown Voltage VBR | 11.1–12.3 V @ 1.0 mA - ensures reliable turn-on before system damage threshold |
| Reverse Leakage IR | <1.0 μA @ 10 V - minimizes standby power loss in battery-backed systems |
| Response Time | <1.0 ps (0 V to BV) - activates faster than most microcontroller I/O propagation delays |
| Junction Temperature | +175°C max - supports operation near heat-generating power stages |
Pinout & Package
DO-15 axial-leaded package with cathode indicated by color band; leads are tinned copper, 0.375" length, rated for 1.0 W steady-state dissipation at 75°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path / ground reference | Connected to system ground plane; carries full surge current during clamping |
| Cathode | Protected line input | Connected to DC input rail (e.g., +12 V); blocks reverse leakage until breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics across temperature and lifetime |
| 500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV surge) without derating in typical PCB layouts |
| Low clamping ratio (VC/VBR ≈ 1.45) | Reduces voltage overshoot margin required in protected circuit design |
| Sub-1 ps response time | Activates before ESD or fast transients propagate into sensitive analog or logic sections |
Applications
| Industrial PLC Power Input | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller exposed to load dump and inductive switching noise. IC Role / Device Role: Primary overvoltage clamp protecting upstream DC-DC converter and microcontroller supply rails. Use Value: Clamps 500 W surges to ≤17.0 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. |
Use Scenario: 12 V battery-fed body control unit subject to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role: Unidirectional TVS placed between fuse output and LDO input. Use Value: Sub-1 ps response ensures clamping before 12 V rail collapse affects CAN transceiver biasing. |
| Point-of-Load DC-DC Converter | Smart Sensor Node Power Rail |
Use Scenario: Input protection for 5 V buck converter supplying FPGA I/O banks. IC Role / Device Role: First-line transient suppressor ahead of input capacitor and converter IC. Use Value: 17.0 V clamping prevents overvoltage stress on MOSFET gate oxide and bootstrap capacitor dielectric. |
Use Scenario: 3.3 V supply rail of wireless sensor node powered by Li-ion battery and boost regulator. IC Role / Device Role: Surge limiter on regulator output to protect RF SoC and MEMS sensor interface. Use Value: <1 μA leakage preserves battery life; DO-15 footprint allows manual rework on compact PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10A | DO-214AA package; 600 W rating; 17.0 V VC same; 30.2 A IPPM | SMT layout required; higher surge margin but no axial lead option | Preferred for new SMT designs needing higher power headroom |
| P6KE10A | DO-15 package; 600 W rating; 17.0 V VC; 35.0 A IPPM; slower response (~1 ns) | Same through-hole fit; slightly higher surge capacity but longer turn-on delay | Valid drop-in replacement where sub-ns speed is not critical |
Compared with SMBJ10A and P6KE10A, the SA10A offers identical clamping voltage and DO-15 mechanical compatibility but lower peak power rating - making it optimal for cost-sensitive, space-constrained legacy designs where 500 W surge coverage is sufficient and axial leads are mandated.
Availability
SA10A is available at Aetrix Electronics and suitable for industrial PLC power inputs, automotive body control modules, and point-of-load DC-DC converters requiring stable component supply with long-term obsolescence management.
Supply support for SA10A 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, signal conditioning, and discrete components before its acquisition by ON Semiconductor in 2016; its legacy TVS portfolio remains widely deployed.
The SA10A belongs to Fairchild's SAxxA series of unidirectional TVS diodes engineered for robust, cost-effective overvoltage protection in industrial and automotive power interfaces - emphasizing reliability under repetitive surge stress.
FAQ
What is the maximum clamping voltage of the SA10A under specified test conditions?
The SA10A has a maximum clamping voltage (VC) of 17.0 V when subjected to its rated peak pulse current (IPPM = 29.4 A) on a 10/1000 μs waveform. This value is measured at the device terminals with specified test setup per Rev. D datasheet, and defines the upper voltage limit imposed on protected circuits during surge events. The SA10A maintains this clamping performance across its operating junction temperature range.
Is the SA10A suitable for bidirectional transient protection?
No, the SA10A is a unidirectional TVS diode and is not rated for bidirectional protection. It features a cathode band and conducts only in reverse breakdown - forward conduction is limited to normal diode behavior. For bidirectional applications, Fairchild specifies the SA10CA variant, which lacks the cathode band and provides symmetrical clamping in both polarities. Using SA10A in place of SA10CA risks unprotected positive-going transients.
What is the reverse leakage current specification for the SA10A at its rated stand-off voltage?
The SA10A exhibits a maximum reverse leakage current (IR) of 1.0 μA when biased at its reverse stand-off voltage (VRWM = 10 V) and tested at TA = 25°C. This low leakage supports energy-efficient designs, especially in battery-powered or always-on systems. The datasheet confirms this value applies to all SAxxA unidirectional parts with VRWM ≥ 10 V, and is verified under standardized test conditions.
Does the SA10A meet any industry-standard surge immunity requirements out of the box?
The SA10A's 500 W peak pulse rating on the 10/1000 μs waveform aligns with the surge energy defined in IEC 61000-4-5 for Level 3 (2 kV) and Level 4 (4 kV) testing when combined with appropriate series impedance. While the SA10A itself is not certified, its electrical parameters enable compliant front-end protection in designs targeting those standards - validation requires full-system testing per application layout and coupling network.
What is the thermal derating behavior of the SA10A above 75°C ambient temperature?
The SA10A's steady-state power dissipation derates linearly above 75°C ambient, reaching zero at +175°C junction temperature. At 100°C ambient, its usable continuous power drops to approximately 0.75 W; this derating curve is documented in Figure 5 of the Rev. D datasheet. Designers must apply this curve when calculating safe operating area in enclosed or high-temperature enclosures.
SA10A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- 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
SA10A FAQ
1.How can I place an order for SA10A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA10A 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 SA10A reliable?
The price and inventory of SA10A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA10A is usually 5 days.
3.What payment methods are accepted for SA10A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA10A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA10A?
SA10A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA10A 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 SA10A?
For technical support, including SA10A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA10A requirements.
6.How does Aetrix verify that SA10A is sourced from the original manufacturer or authorized distributors?
All SA10A 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 SA10A meets industry standards.
7.What is the process for return or replacement of SA10A?
All SA10A units undergo pre-shipment inspection (PSI). If there is an issue with SA10A, 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 SA10A part is unused and in its original packaging.
Return procedure for SA10A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA10A Tags
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