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onsemi SA15ARL
- Part No.:
- SA15ARL
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15ARL.pdf
- Description:
- TVS DIODE 15VWM 24.4VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,191
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Product details
Overview
SA15ARL from onsemi is a unidirectional 500 W peak power MiniMOSORB Zener transient voltage suppressor (TVS) designed for clamping high-energy transients in DC power rails and signal lines. It features a 15 V working peak reverse voltage (VRWM), 24.4 V maximum clamping voltage at 20.6 A peak pulse current, <1 µA leakage at VRWM, and sub-1 ns response time. It is used in industrial power supplies and medical equipment input protection.
For engineers reviewing the SA15ARL datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system operating voltage, clamping voltage margin relative to protected IC VMAX, surge current capability under IEC 61000-4-5 waveforms, and axial leaded Surmetic package compatibility with through-hole PCB layouts.
Technical Context
The SA15ARL operates as a unidirectional Zener-based TVS diode, conducting only during negative transients relative to its cathode. Its breakdown voltage is specified at 16.7–18.5 V (min/typ/max) with 1 mA test current, and it maintains stable clamping up to 500 W non-repetitive pulses per 1 ms waveform (Figure 4).
It complies with UL 497B for isolated loop circuit protection and achieves Class 3 ESD immunity (>16 kV HBM). Thermal resistance is 33.3 °C/W (junction-to-lead), enabling reliable operation at junction temperatures from –55 °C to +175 °C with proper lead length derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail or signal swing. |
| VBR @ IT=1 mA | 16.7–18.5 V - Breakdown threshold range; defines onset of avalanche conduction under transient stress. |
| VC @ IPP=20.6 A | 24.4 V - Maximum clamped voltage during 1 ms pulse; determines worst-case overvoltage seen by downstream ICs. |
| IPP | 20.6 A - Peak pulse current supported at rated clamping voltage; correlates to IEC 61000-4-5 Level 4 surge capability. |
| Leakage @ VRWM | <1 µA - Negligible standby power loss and signal distortion in always-on protection circuits. |
| Response Time | <1 ns - Fast enough to protect CMOS inputs and high-speed interfaces against EFT/burst events. |
| Package | Case 59AA (DO-41 axial) - Standard through-hole plastic package with cathode band marking and Pb-free finish. |
Pinout & Package
SA15ARL uses an axial-leaded Surmetic plastic package (Case 59AA, DO-41 compatible), with polarity indicated by a cathode band. Leads are solderable at 260 °C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., +15 V rail); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B recognition | Validated for isolated loop circuit protection including strike voltage, endurance, and dielectric withstand tests - required for certified industrial safety designs. |
| 500 W peak pulse rating | Supports robust protection against IEC 61000-4-5 4th-level surges (2 Ω source impedance, 12 A/40 A) without degradation. |
| Class 3 ESD immunity | Withstands >16 kV contact discharge per Human Body Model - eliminates need for additional ESD stages in front-end interfaces. |
| Low zener impedance | Ensures tight clamping voltage tolerance across temperature and current - critical for protecting narrow-voltage-margin ICs like microcontrollers. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment EMI Filter Clamp |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between +24 V rail and chassis ground to limit transient overvoltage to ≤24.4 V. Use Value: Prevents latch-up or gate oxide damage in upstream DC/DC controllers and downstream FPGA I/O banks during 500 W surge events. | Use Scenario: Secondary-side output of isolated medical-grade AC/DC adapter feeding analog sensor front-end. IC Role / Device Role / Timing Role: Clamping device on isolated 15 V bias rail to suppress coupling noise from primary-side switching and external EFT bursts. Use Value: Maintains signal integrity and meets IEC 60601-1 creepage/clearance requirements while providing UL 497B-certified isolation barrier protection. |
| Numerical Control System Signal Line Guard | Business Machine Communication Port Surge Suppression |
Use Scenario: 15 V reference line in CNC motion controller interfacing with stepper motor driver feedback circuits. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS connected between 15 V ref and ground to prevent reference drift during motor commutation spikes. Use Value: Preserves ADC accuracy and closed-loop positioning stability without introducing offset error or thermal drift in precision analog paths. | Use Scenario: RS-485 data line termination in point-of-sale terminal exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional clamping element on differential pair common-mode node, referenced to local ground. Use Value: Limits common-mode overvoltage to safe levels for transceiver ESD structures while preserving signal edge integrity due to <1 ns response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Surface-mount SMA package (vs. axial SA15ARL); same VRWM (15 V), slightly higher VC (24.4 V → 25.1 V at 20.6 A) | Requires SMT reflow process and board space optimization; unsuitable for manual repair or high-vibration environments. | Select when automated assembly, board density, or thermal cycling reliability outweigh through-hole mechanical robustness. |
| P6KE15A | Legacy DO-15 package; identical electrical specs but lacks UL 497B certification and Pb-free compliance per SA15ARL's G-suffix standard. | Not approved for certified medical or industrial isolator designs requiring UL recognition. | Select only for cost-sensitive, non-certified consumer applications where regulatory compliance is not mandated. |
Compared with SMAJ15A and P6KE15A, SA15ARL provides verified UL 497B certification, Pb-free axial packaging optimized for serviceability and high-reliability through-hole mounting, and tighter clamping consistency across temperature - making it preferred for regulated industrial and medical systems.
Availability
SA15ARL is available at Aetrix Electronics and suitable for industrial power supplies, medical equipment front-ends, and numerical control systems requiring stable component supply with full regulatory documentation and traceable sourcing.
Supply support for SA15ARL 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The SA5.0A Series is part of onsemi's MiniMOSORB transient suppression portfolio, engineered specifically for robust, standards-compliant overvoltage protection in safety-critical DC power and signal interfaces.
FAQ
What is the maximum clamping voltage of the SA15ARL under surge conditions?
The SA15ARL has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 20.6 A per the 1 ms exponential waveform defined in Figure 4 of the datasheet. This value is measured at TA = 25 °C and represents the worst-case overvoltage imposed on protected circuitry during transient events. The SA15ARL maintains this clamping performance across its full operating temperature range with specified temperature coefficient.
Does the SA15ARL meet UL safety standards for industrial isolation barriers?
Yes, the SA15ARL is UL 497B recognized (File #E116110, QVGV2 category) for isolated loop circuit protection. It passed all required tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge validation. This certification applies specifically to the SA5.0A–SA170A series, confirming SA15ARL's suitability in certified industrial safety systems where isolation barrier integrity is mandated.
What is the package type and lead configuration of the SA15ARL?
The SA15ARL is supplied in the Surmetic axial-leaded Case 59AA package (JEDEC DO-41 compatible), featuring tinned copper leads with cathode polarity indicated by a painted band. Lead diameter is 0.71–0.86 mm, overall body length is 5.80–7.60 mm, and maximum lead temperature for soldering is 260 °C at 1/16 inch from case for 10 seconds. The "RLG" suffix denotes Pb-free tape-and-reel packaging (5000 units/reel).
How does the SA15ARL compare to bidirectional TVS diodes in surge protection design?
The SA15ARL is unidirectional and intended for DC-biased lines where transients occur only in one polarity - such as positive supply rails. Unlike bidirectional devices, it avoids forward-conduction leakage during normal operation and offers lower capacitance. For AC or floating signal lines, a bidirectional variant (e.g., SA15A) would be required; SA15ARL must not be substituted without verifying system bias and transient polarity constraints.
Is the SA15ARL suitable for ESD protection in high-speed digital interfaces?
While the SA15ARL provides Class 3 HBM ESD immunity (>16 kV), its 500 W peak power rating and DO-41 package make it better suited for system-level surge (IEC 61000-4-5) than board-level ESD (IEC 61000-4-2). Its typical capacitance is ~100 pF at zero bias - too high for USB 2.0 or HDMI. Use SA15ARL for upstream port-level clamping, not directly on high-speed data lanes; pair with low-capacitance TVS arrays for interface-specific ESD.
SA15ARL 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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
SA15ARL FAQ
1.How can I place an order for SA15ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15ARL 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 SA15ARL reliable?
The price and inventory of SA15ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15ARL is usually 5 days.
3.What payment methods are accepted for SA15ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15ARL?
SA15ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15ARL 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 SA15ARL?
For technical support, including SA15ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15ARL requirements.
6.How does Aetrix verify that SA15ARL is sourced from the original manufacturer or authorized distributors?
All SA15ARL 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 SA15ARL meets industry standards.
7.What is the process for return or replacement of SA15ARL?
All SA15ARL units undergo pre-shipment inspection (PSI). If there is an issue with SA15ARL, 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 SA15ARL part is unused and in its original packaging.
Return procedure for SA15ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA15ARL Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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