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onsemi SA9.0ARLG
- Part No.:
- SA9.0ARLG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA9.0ARLG.pdf
- Description:
- TVS DIODE 9VWM 15.4VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,518
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Product details
Overview
SA9.0ARLG 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 9.0 V working peak reverse voltage (VRWM), 12.5 V maximum clamping voltage at 45.7 A peak pulse current, <1 µA leakage at VRWM, <1 ns response time, and UL 497B recognition for isolated loop circuit protection - deployed in industrial power supplies and medical equipment surge protection.
For engineers reviewing the SA9.0ARLG datasheet, pinout, applications, or equivalent options, key selection criteria include verified clamping performance at rated IPP, axial leaded Surmetic package thermal derating behavior, UL 497B compliance scope, and compatibility with 8.3 ms half-sine surge waveforms per IEC 61000-4-5 surrogate testing.
Technical Context
The SA9.0ARLG operates as a unidirectional Zener-based TVS diode, leveraging avalanche breakdown to clamp transient overvoltages above its 9.0 V VRWM threshold. Its low zener impedance and sub-1 ns response enable effective suppression of ESD and lightning-induced surges before downstream ICs are damaged.
It is rated for 500 W nonrepetitive peak pulse power (1.0 ms), supports 70 A forward surge current (8.3 ms half-sine), and exhibits a temperature coefficient of 5.5 mV/°C for VBR drift control. The device complies with Class 3 ESD (>16 kV HBM) and UL 497B for isolated loop protection - confirmed for SA5.0A–SA170A series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system DC rail compatibility. |
| VC @ IPP | 12.5 V @ 45.7 A - Clamped voltage during 1.0 ms transient; defines worst-case stress on protected IC inputs. |
| IPP | 45.7 A - Peak pulse current corresponding to 500 W rating; used to size PCB trace width and fuse coordination. |
| IR @ VRWM | <1 µA - Reverse leakage at 9.0 V; ensures negligible standby power loss in battery-powered systems. |
| Response Time | <1.0 ns - Time from transient onset to clamping activation; critical for protecting high-speed logic interfaces. |
| UL Recognition | UL 497B (QVGQ2, File #E210057) - Validated for isolated loop circuit protection; enables certified medical/industrial system design. |
| Package | Case 59AA, axial leaded - Void-free thermoset plastic housing with corrosion-resistant leads; supports manual or wave soldering at 260°C/10 s. |
Pinout & Package
SA9.0ARLG uses an axial-leaded, polarity-banded Surmetic package (Case 59AA). Cathode is marked by a band; anode is unmarked lead. Leads are 0.71–0.86 mm diameter, 25.44 mm long, with body dimensions 5.80–7.60 mm × 2.60–3.60 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., GND) in unidirectional clamping configuration. |
| Cathode | Current exit terminal during reverse breakdown | Connected to protected line (e.g., +9 V rail); clamps transients toward anode reference. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power (1.0 ms) | Enables robust protection against IEC 61000-4-5 Level 4 surges without thermal runaway under single-event stress. |
| UL 497B recognition (QVGQ2) | Validates suitability for safety-critical isolated loop circuits in medical and industrial control systems per regulatory filing. |
| Class 3 ESD immunity (>16 kV HBM) | Meets stringent electrostatic discharge requirements for front-panel interfaces and field-serviceable equipment. |
| Low zener impedance & fast response | Minimizes voltage overshoot during nanosecond-scale transients, preserving timing margins in digital signal paths. |
| Pb−Free Surmetic axial package | Complies with RoHS Directive 2011/65/EU and supports automated tape-and-reel assembly (5000 pcs/reel). |
Applications
| Industrial Power Supply Protection | Medical Equipment Surge Suppression |
|---|---|
Use Scenario: Protecting 9 V DC input rails in programmable logic controllers (PLCs) exposed to inductive switching noise and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy away from upstream rectifier and downstream LDO regulators. Use Value: Limits rail voltage to ≤12.5 V during 45.7 A surges, preventing latch-up in 3.3 V/5 V logic supervisors and microcontrollers. |
Use Scenario: Safeguarding isolated sensor interface lines (e.g., ECG front-end analog inputs) against ESD and defibrillator-induced transients. IC Role / Device Role / Timing Role: First-line transient shunt on patient-connected signal paths, referenced to isolated ground plane. Use Value: UL 497B certification confirms compliance with IEC 60601-1 creepage/clearance and isolation barrier integrity requirements. |
| Communications Interface Protection | Numerical Control System Input Protection |
Use Scenario: Shielding RS-485 transceiver VCC pins and bus lines in factory automation gateways subjected to cable discharge events. IC Role / Device Role / Timing Role: Standoff diode placed between VCC and GND, clamping supply rail excursions caused by common-mode surges. Use Value: Sub-1 ns response prevents data corruption during 8.3 ms half-sine surges; <1 µA leakage avoids bias current errors in precision receivers. |
Use Scenario: Guarding 9 V encoder feedback lines in CNC machine tool drives against motor commutation spikes and grounding faults. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS mounted across differential pair or single-ended analog return path. Use Value: 500 W peak power rating sustains repeated 100 A surge exposure per IEC 61800-3, extending encoder lifetime in harsh EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Surface-mount SMA package (vs. axial Case 59AA); 400 W peak power; 12.6 V VC @ 38.5 A. | Requires PCB rework for SMT placement; lacks UL 497B recognition; suited for space-constrained consumer electronics. | Select when board real estate is limited and UL certification is not required for end-equipment safety approval. |
| P6SMB9.0A | DO-214AA package; 600 W peak power; 12.6 V VC @ 47.6 A; same VRWM and UL 497B listing. | Higher surge margin but larger footprint; identical clamping behavior and safety qualification scope as SA9.0ARLG. | Choose for enhanced single-pulse robustness where axial lead insertion is impractical and thermal mass allows higher PD. |
Compared with SMAJ9.0A and P6SMB9.0A, the SA9.0ARLG uniquely combines axial-leaded manufacturability, UL 497B certification, and precise 9.0 V VRWM tolerance - making it optimal for through-hole industrial power modules requiring audit-ready safety documentation and legacy assembly compatibility.
Availability
SA9.0ARLG is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic equipment, and communications infrastructure requiring stable component supply with full regulatory traceability and long-term lifecycle support.
Supply support for SA9.0ARLG 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The SA5.0A Series - including SA9.0ARLG - was engineered specifically for cost-sensitive, high-reliability transient suppression in industrial control, medical instrumentation, and telecom infrastructure where UL 497B compliance and axial-leaded assembly are mandatory.
FAQ
What is the clamping voltage of SA9.0ARLG at its rated peak pulse current?
The SA9.0ARLG has a maximum clamping voltage (VC) of 12.5 V at its rated peak pulse current (IPP) of 45.7 A, measured using the 1.0 ms exponential waveform defined in Figure 4 of the datasheet. This value ensures protected circuits experience no more than 12.5 V during worst-case transient events. The SA9.0ARLG's low dynamic impedance enables consistent clamping performance across temperature and aging conditions.
Does SA9.0ARLG meet UL 497B requirements for isolated loop protection?
Yes, SA9.0ARLG is explicitly included in onsemi's UL 497B recognition (File #E210057, Category QVGQ2) for isolated loop circuit protection, as confirmed in the October 2009 datasheet revision. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown tests - validating its use in medical and industrial isolation barriers. The SA9.0ARLG shares this qualification with the full SA5.0A–SA170A series.
What is the maximum steady-state power dissipation for SA9.0ARLG at 25°C ambient?
The SA9.0ARLG has a steady-state power dissipation (PD) rating of 3.0 W at TL ≤ 25°C with 3/8″ lead length, derating linearly to 30 mW/°C above 50°C. This thermal limit applies only to continuous DC or low-frequency AC stress - not transient suppression duty cycles. For reliable operation, PCB layout must maintain adequate lead-to-heatsink thermal path, especially in enclosed industrial enclosures.
Is SA9.0ARLG compatible with lead-free reflow or wave soldering processes?
Yes, SA9.0ARLG is Pb−Free and qualified for lead-free soldering at 260°C for 10 seconds at 1/16″ from the case, per onsemi's Soldering and Mounting Techniques Reference Manual. Its Surmetic axial package uses corrosion-resistant, readily solderable leads and void-free thermoset plastic - supporting both manual and automated wave soldering without delamination or cracking.
How does the SA9.0ARLG differ from bidirectional TVS diodes in surge protection?
The SA9.0ARLG is unidirectional and functions only during reverse-biased transients - ideal for DC power rail clamping where polarity is fixed. Unlike bidirectional devices, it provides no protection during positive-going surges on grounded lines. Its 9.0 V VRWM and low leakage (<1 µA) make it preferable for asymmetric voltage domains, whereas bidirectional variants like SA9.0A (not SA9.0ARLG) would be selected for AC line or floating signal protection.
SA9.0ARLG 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 32.5A
- 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
SA9.0ARLG FAQ
1.How can I place an order for SA9.0ARLG through Aetrix?
Please submit a Request for Quotation (RFQ) for SA9.0ARLG 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 SA9.0ARLG reliable?
The price and inventory of SA9.0ARLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA9.0ARLG is usually 5 days.
3.What payment methods are accepted for SA9.0ARLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA9.0ARLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA9.0ARLG?
SA9.0ARLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA9.0ARLG 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 SA9.0ARLG?
For technical support, including SA9.0ARLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA9.0ARLG requirements.
6.How does Aetrix verify that SA9.0ARLG is sourced from the original manufacturer or authorized distributors?
All SA9.0ARLG 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 SA9.0ARLG meets industry standards.
7.What is the process for return or replacement of SA9.0ARLG?
All SA9.0ARLG units undergo pre-shipment inspection (PSI). If there is an issue with SA9.0ARLG, 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 SA9.0ARLG part is unused and in its original packaging.
Return procedure for SA9.0ARLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA9.0ARLG Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
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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