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onsemi SA15ARLG
- Part No.:
- SA15ARLG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
SA15ARLG.pdf
- Description:
- TVS DIODE 15VWM 24.4VC TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:235,000
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Product details
Overview
SA15ARLG from onsemi is a unidirectional 500 W peak power MiniMOSORB Zener transient voltage suppressor (TVS) in axial leaded Surmetic package (Case 59AA), designed to clamp high-energy transients at ≤24.4 V while sustaining 20.6 A peak pulse current and exhibiting <1 ns response time. It operates with 15 V working peak reverse voltage and is UL 497B recognized for isolated loop circuit protection.
For engineers reviewing the SA15ARLG datasheet, pinout, applications, or equivalent options, this page delivers verified clamping voltage, thermal derating behavior, Pb-free tape-and-reel availability, and UL-certified surge protection capability for industrial power supply and communication interface design.
Technical Context
The SA15ARLG functions as a unidirectional Zener-based TVS diode, leveraging avalanche breakdown at 16.7–18.5 V (VBR @ IT = 1 A) to limit transient overvoltage. Its low zener impedance and fast <1 ns response ensure effective suppression of ESD and lightning-induced surges before downstream ICs are damaged.
It is rated for 500 W nonrepetitive peak power (1 ms pulse), 3.0 W steady-state dissipation at TL ≤ 75°C, and operates across −55°C to +175°C. Thermal resistance RJL is 33.3°C/W, and it meets Class 3 ESD immunity (>16 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power | 500 W @ 1.0 ms pulse - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage (VRWM) | 15 V - sets maximum continuous operating voltage before clamping activates |
| Clamping Voltage (VC @ IPP) | 24.4 V @ 20.6 A - defines worst-case voltage seen by protected circuit during surge |
| Breakdown Voltage (VBR) | 16.7–18.5 V @ 1 A - precise avalanche onset range ensures predictable turn-on |
| Response Time | <1.0 ns - enables protection of high-speed interfaces against nanosecond-scale transients |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 for system-level robustness |
| UL Recognition | UL 497B (QVGV2, File #E116110) - certified for isolated loop circuit protection in safety-critical systems |
Pinout & Package
SA15ARLG uses an axial-leaded Surmetic plastic package (Case 59AA, similar to DO-204AC/DO-15), with cathode indicated by a polarity band. Leads are corrosion-resistant, solderable, and rated for 230°C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-impedance return path in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., data line, power rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power rating | Enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without degradation |
| UL 497B recognition | Validates suitability for telecom and industrial isolated loop circuits per safety standard QVGV2 |
| Pb-free tape-and-reel packaging (SA15ARLG) | Supports automated SMT assembly with RoHS-compliant logistics (5000 pcs/reel) |
| Low zener impedance & fast response | Minimizes let-through energy during sub-100 ns transients in USB, RS-485, and PoE interfaces |
| −55°C to +175°C operating range | Permits deployment in under-hood automotive ECUs, industrial motor drives, and outdoor power supplies |
Applications
| Industrial Power Supplies | Telecom Line Interfaces |
|---|---|
|
Use Scenario: Input rectifier stage of 24 V DC industrial power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping positive-going surges on the DC bus. Use Value: Clamps transients to ≤24.4 V, preventing overvoltage damage to downstream regulators and microcontrollers. |
Use Scenario: Protection of RS-485 transceiver pins in factory automation networks subject to cable discharge events. IC Role / Device Role / Timing Role: Standoff device absorbing ESD and lightning-induced common-mode surges on differential lines. Use Value: Responds in <1 ns to limit line voltage excursion below transceiver absolute maximum ratings (±15 V). |
| Medical Equipment Surge Protection | Business Machine Power Inputs |
|
Use Scenario: AC/DC adapter input stage in portable diagnostic devices requiring compliance with IEC 60601-1 surge immunity. IC Role / Device Role / Timing Role: Primary-level transient suppressor on L/N inputs prior to fuse and bridge rectifier. Use Value: UL 497B certification validates use in patient-connected equipment isolation barriers. |
Use Scenario: 12 V auxiliary rail protection in point-of-sale terminals subjected to hot-plug and ESD events. IC Role / Device Role / Timing Role: Low-leakage (<1 µA @ 12.75 V) standoff TVS on regulated supply output. Use Value: Maintains system uptime by suppressing 8 kV contact ESD without false triggering or power rail disturbance. |
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 SA15ARLG); 400 W peak power; VC = 24.4 V @ 17.3 A | Requires PCB re-layout; better suited for space-constrained consumer electronics | Select SMAJ15A when board area is limited and automated reflow is preferred over axial through-hole assembly. |
| P6SMB15A | DO-214AA package; 600 W peak power; VC = 24.4 V @ 24.6 A; same VRWM/VBR range | Higher surge margin but larger footprint than axial leaded SA15ARLG; no UL 497B listing | Choose P6SMB15A where higher single-pulse energy handling is required and UL certification is not mandated. |
Compared with SMAJ15A and P6SMB15A, the SA15ARLG uniquely combines axial-leaded manufacturability, UL 497B certification for isolated loops, and Pb-free tape-and-reel delivery-making it optimal for industrial power supply and telecom infrastructure designs requiring traceable, safety-validated surge protection.
Availability
SA15ARLG is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, medical equipment surge protection, and business machine power inputs requiring stable component supply with full RoHS compliance and UL safety validation.
Supply support for SA15ARLG 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 manufacturer specializing in energy-efficient power management, analog, sensor, and logic solutions for automotive, industrial, cloud computing, and IoT applications.
The SA5.0A Series-including SA15ARLG-is part of onsemi's MiniMOSORB TVS portfolio, engineered specifically for high-reliability transient suppression in industrial control, communications infrastructure, and medical electronics where UL certification and axial-leaded robustness are critical.
FAQ
What is the clamping voltage of the SA15ARLG under peak pulse conditions?
The SA15ARLG has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 20.6 A (IPP). This value is measured per the 1.0 ms exponential pulse waveform defined in Figure 4 of the SA5.0A/D datasheet and represents the upper bound voltage imposed on the protected circuit during surge events.
Is the SA15ARLG certified for safety-critical applications?
Yes, the SA15ARLG carries UL 497B recognition (File #E116110, category QVGV2) for isolated loop circuit protection. This certification confirms successful completion of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing-making it suitable for use in medical, telecom, and industrial systems requiring third-party safety validation.
Does the SA15ARLG have Pb-free construction?
Yes, the "G" suffix in SA15ARLG explicitly denotes a Pb-free package. The device complies with RoHS Directive 2011/65/EU and is supplied in tape-and-reel format (5000 units per reel), with leads and mold compound fully exempt from lead content per JEDEC J-STD-609.
What is the thermal resistance and steady-state power rating of the SA15ARLG?
The SA15ARLG has a junction-to-lead thermal resistance (RJL) of 33.3°C/W and a steady-state power dissipation (PD) of 3.0 W at lead temperature (TL) ≤ 75°C. Derating begins above 75°C at 30 mW/°C, per Figure 5 in the SA5.0A/D datasheet.
How does the SA15ARLG compare to bidirectional TVS diodes in surge protection?
The SA15ARLG is unidirectional and optimized for DC-biased lines (e.g., power rails, RS-485 with common-mode bias). Unlike bidirectional variants (e.g., CA15A), it provides lower leakage (<1 µA @ 12.75 V) and tighter VBR tolerance-critical where reverse leakage could disrupt bias networks or reference voltages in precision analog circuits.
SA15ARLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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 ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TO252-3-11
SA15ARLG FAQ
1.How can I place an order for SA15ARLG through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15ARLG 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 SA15ARLG reliable?
The price and inventory of SA15ARLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15ARLG is usually 5 days.
3.What payment methods are accepted for SA15ARLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15ARLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15ARLG?
SA15ARLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15ARLG 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 SA15ARLG?
For technical support, including SA15ARLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15ARLG requirements.
6.How does Aetrix verify that SA15ARLG is sourced from the original manufacturer or authorized distributors?
All SA15ARLG 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 SA15ARLG meets industry standards.
7.What is the process for return or replacement of SA15ARLG?
All SA15ARLG units undergo pre-shipment inspection (PSI). If there is an issue with SA15ARLG, 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 SA15ARLG part is unused and in its original packaging.
Return procedure for SA15ARLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA15ARLG 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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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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