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onsemi SA5.0A
- Part No.:
- SA5.0A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
SA5.0A.pdf
- Description:
- TVS ZENER UNIDIR 500W 5.0V AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,668
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Product details
Overview
SA5.0A from ON Semiconductor is a unidirectional 500 W peak power MiniMOSORB Zener transient voltage suppressor (TVS) designed to protect voltage-sensitive components against high-energy transients in DC power rails and signal lines. It features a 5.0 V working peak reverse voltage (VRWM), 9.2 V clamping voltage at 54.3 A peak pulse current, <1.0 ns response time, and UL 497B recognition for isolated loop circuit protection.
For engineers reviewing the SA5.0A datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, axial lead package details, real-world clamping performance data, and direct alternative options for surge protection design in industrial power supplies, medical equipment, and communication interfaces.
Technical Context
The SA5.0A operates as a unidirectional Zener-based TVS diode with a specified breakdown voltage of 6.4–7.0 V at 10 mA test current and clamps transients to ≤9.2 V at 54.3 A peak pulse current (1 ms exponential waveform). Its low zener impedance and fast <1.0 ns response enable effective suppression of ESD and lightning-induced surges.
It is rated for 500 W nonrepetitive peak power dissipation at TL ≤ 25°C, derates linearly above 75°C, and maintains stable operation across –55°C to +175°C junction temperature range. The device meets Class 3 ESD immunity (>16 kV HBM) and complies with UL 497B for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system rail compatibility. |
| VC @ IPP | 9.2 V @ 54.3 A - Clamped voltage during 1 ms transient; defines worst-case overvoltage seen by protected ICs. |
| PPK | 500 W - Peak transient energy absorption capability; supports IEC 61000-4-5 Level 4 surge testing. |
| Response Time | <1.0 ns - Enables suppression of fast-rising ESD and switching noise before downstream components are stressed. |
| IR @ VRWM | <600 µA - Low leakage ensures minimal standby power loss in battery-backed or low-power systems. |
| UL Recognition | UL 497B QVGV2 - Certified for use in isolated loop circuits; validates reliability under sustained surge stress. |
| TJ Range | –55°C to +175°C - Supports deployment in automotive engine compartments and industrial motor controls. |
Pinout & Package
SA5.0A is housed in an axial-leaded Surmetic plastic package (Case 59AA), with cathode indicated by a polarity band. Leads are corrosion-resistant, solderable, and rated for 260°C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to ground or lower-potential node in unidirectional TVS configuration. |
| Cathode | Current exit terminal under forward bias; marked with band | Connected to protected line (e.g., VCC, signal); conducts during reverse transient to clamp voltage. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Supports robust protection against IEC 61000-4-5 4th-level surges without thermal runaway. |
| Clamping voltage ≤9.2 V @ 54.3 A | Ensures safe overvoltage margin below absolute maximum ratings of 3.3 V and 5 V logic ICs. |
| ESD rating >16 kV (HBM) | Meets IEC 61000-4-2 Level 4 for system-level ESD immunity in end-equipment certification. |
| UL 497B recognition | Validates suitability for telecom and industrial isolated interface protection per safety-critical standards. |
| Low zener impedance | Minimizes voltage overshoot during fast transients, improving protection fidelity for sensitive analog inputs. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment Signal Line Protection |
|---|---|
Use Scenario: Protecting 5 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and chassis ground to shunt surge energy. Use Value: Clamps 500 W transients to ≤9.2 V, preserving integrity of upstream DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding RS-232/RS-485 communication lines in diagnostic imaging devices from ESD and cable discharge events. IC Role / Device Role / Timing Role: Line-side transient suppressor on isolated data ports, referenced to local signal ground. Use Value: Sub-1 ns response and UL 497B certification ensure compliance with IEC 60601-1-2 immunity requirements. |
| Business Machine Power Entry | Process Control Sensor Interface |
Use Scenario: Shielding AC-DC adapter outputs in point-of-sale terminals and ATMs from mains-borne surges. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated 5 V/12 V outputs to prevent latch-up in embedded controllers. Use Value: 5.0 V VRWM matches standard logic supply; low leakage avoids affecting no-load regulation. |
Use Scenario: Protecting 4–20 mA current loop inputs in distributed control systems (DCS) from field wiring transients. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode to loop+, anode to loop−) for loop-powered sensors. Use Value: Stable 6.4–7.0 V breakdown enables precise threshold setting without false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Same VRWM (5.0 V) and VC (9.2 V), but SMC/SMB package; 600 W PPK; higher IR (1 mA max). | Surface-mount layout; better thermal coupling to PCB; unsuitable for through-hole or axial-replacement designs. | Select when board space is constrained and reflow assembly is used; verify pad thermal relief for 500+ W surge handling. |
| P6KE5.0A | Same VRWM and VC, but DO-15 package; 600 W PPK; slower response (~1.5 ns); no UL 497B recognition. | Legacy through-hole replacement; lacks safety certification for isolated loop use in medical/industrial systems. | Acceptable for cost-sensitive non-certified applications; avoid where UL 497B or sub-1 ns response is required. |
Compared with SMBJ5.0A and P6KE5.0A, the SA5.0A uniquely combines axial-leaded mechanical robustness, UL 497B certification, and sub-1 ns response-making it the preferred choice for certified industrial and medical front-end protection where leaded reliability and safety compliance are mandatory.
Availability
SA5.0A is available at Aetrix Electronics and suitable for industrial power supplies, medical equipment interfaces, and communication system surge protection requiring stable component supply and long-term lifecycle support.
Supply support for SA5.0A 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
ON Semiconductor (now part of onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, and cloud power applications.
The SA5.0A belongs to the MiniMOSORB series-a family of axial-leaded Zener TVS diodes engineered specifically for high-reliability transient suppression in harsh environments where UL certification, surge robustness, and long-term stability are critical.
FAQ
What is the clamping voltage of the SA5.0A at its rated peak pulse current?
The SA5.0A clamps to a maximum of 9.2 V at its rated peak pulse current of 54.3 A (1 ms exponential waveform per Figure 4). This value is guaranteed across temperature and represents the upper limit of overvoltage imposed on protected circuitry during surge events. The SA5.0A achieves this with low dynamic impedance, ensuring consistent clamping performance even under repeated stress.
Is the SA5.0A suitable for protecting 3.3 V logic circuits?
No-the SA5.0A is not recommended for direct protection of 3.3 V logic circuits because its 5.0 V VRWM exceeds typical 3.3 V rail tolerances, risking premature conduction during normal operation. For 3.3 V systems, consider lower VRWM devices such as SMAJ3.3A or SMCJ3.3A. The SA5.0A is optimized for 5 V rails and higher-voltage analog/signal paths where its 5.0 V standoff provides adequate margin.
Does the SA5.0A have UL 497B certification, and what does that cover?
Yes, the SA5.0A carries UL 497B recognition (File #E116110, QVGV2 category) for isolated loop circuit protection. This certification validates performance in strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing-confirming suitability for telecom, industrial control, and medical isolation barriers. UL 497B goes beyond basic flammability approval and confirms functional safety under surge stress.
What is the thermal resistance and steady-state power rating of the SA5.0A?
The SA5.0A has a junction-to-lead thermal resistance (RJL) of 33.3°C/W and a steady-state power dissipation of 3.0 W at lead temperature ≤75°C, derating linearly above that. This reflects its axial-leaded Surmetic package's ability to conduct heat through leads into the PCB. For continuous dissipation, mounting must ensure adequate lead thermal path; it is not intended for sustained DC power regulation.
Can the SA5.0A be used in bidirectional configurations?
No-the SA5.0A is explicitly a unidirectional TVS diode, with cathode polarity marked and electrical characteristics specified only for reverse-biased transient suppression. To achieve bidirectional protection, two SA5.0A devices must be connected in series opposition (anode-to-anode), or a dedicated bidirectional part like the SA5.0CA should be selected. Using a single SA5.0A in reverse orientation will not provide symmetrical clamping.
SA5.0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SA5.0A FAQ
1.How can I place an order for SA5.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA5.0A 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 SA5.0A reliable?
The price and inventory of SA5.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA5.0A is usually 5 days.
3.What payment methods are accepted for SA5.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA5.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA5.0A?
SA5.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA5.0A 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 SA5.0A?
For technical support, including SA5.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA5.0A requirements.
6.How does Aetrix verify that SA5.0A is sourced from the original manufacturer or authorized distributors?
All SA5.0A 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 SA5.0A meets industry standards.
7.What is the process for return or replacement of SA5.0A?
All SA5.0A units undergo pre-shipment inspection (PSI). If there is an issue with SA5.0A, 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 SA5.0A part is unused and in its original packaging.
Return procedure for SA5.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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