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onsemi SA7.0ARL
- Part No.:
- SA7.0ARL
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.0ARL.pdf
- Description:
- TVS DIODE 7VWM 12VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,283
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Product details
Overview
SA7.0ARL from ON Semiconductor is a unidirectional MiniMOSORB Zener transient voltage suppressor (TVS) designed for clamping high-energy transients in DC power rails and signal lines. It features a 7.0 V working peak reverse voltage (VRWM), 41.7 A peak pulse current (IPP), 12 V clamping voltage (VC) at IPP, 500 W peak pulse power (1 ms), and <1.0 ns response time. It is used in industrial power supplies and medical equipment input protection.
For engineers reviewing the SA7.0ARL datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system operating voltage, VC margin relative to protected IC absolute maximum ratings, UL 497B certification for isolated loop circuits, and axial lead (Case 59AA) thermal derating above 75°C.
Technical Context
The SA7.0ARL operates as a unidirectional Zener-clamp TVS diode, conducting only during negative transients on the cathode side. Its breakdown voltage (VBR) is 7.78–8.6 V at 10 mA test current, with low zener impedance ensuring stable clamping under surge conditions.
It complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM). Thermal performance is defined by 33.3°C/W junction-to-lead resistance and steady-state power dissipation of 3.0 W at TL ≤ 75°C, derated linearly above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins |
| IPP | 41.7 A - Peak pulse current supported at 1 ms pulse width without failure |
| VC @ IPP | 12 V - Clamped voltage seen by downstream circuitry during 41.7 A transient |
| Breakdown Voltage (VBR) | 7.78–8.6 V @ 10 mA - Ensures reliable turn-on margin above VRWM |
| Leakage Current | 150 µA @ VRWM - Low standby power loss in always-on protection circuits |
| Response Time | <1.0 ns - Fast enough to protect CMOS inputs against EFT and lightning-induced edges |
| UL Recognition | UL 497B QVGV2 - Validated for use in safety-critical isolated loop protection |
Pinout & Package
SA7.0ARL is housed in an axial-leaded Surmetic plastic package (Case 59AA), with cathode indicated by a polarity band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to ground or lower-potential rail; carries full surge current back to source |
| Cathode | Transient sensing and clamping node | Connected to protected line; voltage at this terminal is clamped to ≤12 V during surge |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power (1 ms) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| UL 497B recognition | Qualified for certified isolation barrier protection in telecom and medical systems |
| ESD rating >16 kV HBM | Eliminates need for additional ESD diodes in front-end interfaces |
| Low zener impedance | Maintains tight VC tolerance across production lot and temperature range |
| Pb-Free (RoHS-compliant) | Meets global environmental compliance requirements without solderability trade-offs |
Applications
| Industrial Power Supply Input Protection | Medical Equipment EMI Filter Clamp |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between +24 V rail and chassis ground. Use Value: Limits transient excursions to ≤12 V, protecting upstream DC-DC controller ICs rated for 16 V absolute max. | Use Scenario: Signal line entering isolated patient-monitoring module where galvanic separation is required. IC Role / Device Role / Timing Role: UL 497B-certified clamping device on secondary-side analog sensor interface. Use Value: Meets regulatory requirement for isolated loop protection while suppressing EFT bursts up to 40 A. |
| Telecom Line Card Surge Protection | Automotive Aftermarket Diagnostic Port |
Use Scenario: -48 V telecom central office line card subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary unidirectional clamp on feed line prior to DC-DC converter and line driver ICs. Use Value: Clamps 500 W surges within 1 ns, preserving signal integrity and preventing latch-up in RS-485 transceivers. | Use Scenario: OBD-II diagnostic port in vehicle service tools handling 12 V battery transients. IC Role / Device Role / Timing Role: Front-end TVS on VCC and data lines to protect USB-to-CAN bridge ICs. Use Value: Withstands 70 A forward surge (IFSM) and maintains <150 µA leakage at 7 V, minimizing quiescent drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A | Surface-mount SMA package (vs. axial SA7.0ARL); same VRWM and VC, but lower IPP (32.4 A) | Requires PCB rework for SMT assembly; less robust for high-current bulk protection | Choose SMAJ7.0A only when board space is constrained and surge currents remain ≤30 A |
| P6KE7.0A | DO-15 package; identical VRWM/VC/IPP specs but lacks UL 497B certification and has higher leakage (1 mA vs. 150 µA) | Not suitable for certified isolated-loop designs; higher leakage may affect low-power sensor biasing | Select P6KE7.0A only for cost-sensitive non-certified industrial controls with no isolation barrier requirements |
Compared with SMAJ7.0A and P6KE7.0A, SA7.0ARL provides superior surge robustness (41.7 A IPP), mandatory UL 497B listing for medical/telecom isolation, and ultra-low leakage-making it the preferred choice for safety-critical, high-reliability DC rail protection where axial mounting is acceptable.
Availability
SA7.0ARL is available at Aetrix Electronics and suitable for industrial power supplies, medical equipment input stages, telecom line cards, and automotive diagnostic interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SA7.0ARL 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 supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SA5.0A Series-including SA7.0ARL-is part of ON Semiconductor's MiniMOSORB TVS portfolio, engineered specifically for high-surge, low-clamping protection in safety-certified and mission-critical power and signal interfaces.
FAQ
What is the clamping voltage of SA7.0ARL at its rated peak pulse current?
The SA7.0ARL has a maximum clamping voltage (VC) of 12 V at its rated peak pulse current (IPP) of 41.7 A, measured using the 1 ms exponential waveform per Figure 4 in the datasheet. This value ensures protected downstream components see no more than 12 V during worst-case transients, provided layout minimizes parasitic inductance. The SA7.0ARL maintains this clamping performance across its qualified temperature range of −55°C to +175°C.
Does SA7.0ARL meet UL 497B requirements for isolated loop protection?
Yes, SA7.0ARL is explicitly listed under UL 497B (File #E116110, QVGV2 category) for isolated loop circuit protection, as confirmed in the "UL Recognition" section on page 5 of the SA5.0A/D datasheet. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing-making SA7.0ARL suitable for medical and telecom isolation barriers where regulatory compliance is mandatory.
What is the maximum steady-state power dissipation for SA7.0ARL at 75°C lead temperature?
The SA7.0ARL has a steady-state power dissipation (PD) rating of 3.0 W at a lead temperature (TL) of 75°C, with linear derating of 30 mW/°C above that point. This value assumes 3/8-inch lead length and defines safe continuous operation in thermally constrained environments. Exceeding this limit risks thermal runaway, especially when combined with repetitive surges. The SA7.0ARL's 33.3°C/W junction-to-lead thermal resistance supports this rating.
How does the leakage current of SA7.0ARL compare to other 7 V TVS diodes?
At its 7.0 V working peak reverse voltage (VRWM), SA7.0ARL specifies a maximum reverse leakage current of 150 µA-significantly lower than alternatives like P6KE7.0A (1 mA). This low leakage reduces standby power loss and avoids false triggering in high-impedance sensor bias networks. The SA7.0ARL achieves this via optimized Zener junction design and process control, verified across production lots per the datasheet's electrical characteristics table.
Is SA7.0ARL compatible with lead-free reflow soldering processes?
SA7.0ARL is supplied in a Pb-Free (RoHS-compliant) axial package and is qualified for lead-free soldering at 260°C for 10 seconds at 1/16 inch from the case body, per the mechanical specifications on page 2 of the datasheet. Its leads are tin-plated and corrosion-resistant, ensuring reliable wetting and joint integrity. No special pre-bake or nitrogen atmosphere is required, making SA7.0ARL compatible with standard lead-free manufacturing flows.
SA7.0ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- MiniMosorb™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
SA7.0ARL FAQ
1.How can I place an order for SA7.0ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.0ARL 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 SA7.0ARL reliable?
The price and inventory of SA7.0ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.0ARL is usually 5 days.
3.What payment methods are accepted for SA7.0ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.0ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.0ARL?
SA7.0ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.0ARL 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 SA7.0ARL?
For technical support, including SA7.0ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.0ARL requirements.
6.How does Aetrix verify that SA7.0ARL is sourced from the original manufacturer or authorized distributors?
All SA7.0ARL 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 SA7.0ARL meets industry standards.
7.What is the process for return or replacement of SA7.0ARL?
All SA7.0ARL units undergo pre-shipment inspection (PSI). If there is an issue with SA7.0ARL, 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 SA7.0ARL part is unused and in its original packaging.
Return procedure for SA7.0ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.0ARL Tags
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