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onsemi 1N6291ARL4
- Part No.:
- 1N6291ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6291ARL4.pdf
- Description:
- TVS DIODE 58.1VWM 92VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,865
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Product details
Overview
1N6291ARL4 from ON Semiconductor is a unidirectional 1500 W Mosorb transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against high-energy surges. It features a 58.1 V working peak reverse voltage (VRWM), 68 V breakdown voltage (VBR) at 1 mA, and clamps to ≤92 V at 16.3 A peak pulse current (IPP), making it suitable for industrial power supply input stage surge protection.
For engineers reviewing the 1N6291ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, VRWM alignment with DC bus voltage, UL 497B recognition for isolated loop circuits, and axial leaded Surmetic package compatibility with through-hole PCB layouts.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR of 68 V (min 64.6 V, max 71.4 V). Its low dynamic impedance and sub-1 ns response time enable rapid clamping during fast transients such as EFT or lightning-induced surges.
It is rated for 1500 W nonrepetitive peak pulse power (1 ms waveform), with thermal resistance of 20 °C/W (junction-to-lead) and steady-state power dissipation of 5.0 W at TL ≤ 75 °C. The device complies with UL 497B for isolated loop circuit protection and carries Class 3 (>16 kV) HBM ESD rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58.1 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail voltage to avoid leakage conduction. |
| VBR @ IT = 1 mA | 68 V (min 64.6 V, max 71.4 V) - Voltage at which avalanche breakdown initiates; defines turn-on threshold under standardized test conditions. |
| VC @ IPP = 16.3 A | ≤92 V - Clamped voltage during 1 ms surge; determines maximum stress imposed on downstream components during transient events. |
| PPK | 1500 W @ 1 ms - Peak surge energy handling capability; validates suitability for IEC 61000-4-5 Level 3/4 line-to-ground surges. |
| IR @ VRWM | <5 µA - Reverse leakage current at working voltage; ensures minimal standby power loss and no unintended biasing in high-impedance circuits. |
| Response Time | <1 ns - Time from transient onset to clamping activation; critical for protecting fast-switching MOSFETs and gate drivers. |
| UL Recognition | UL 497B (QVGV2) - Certified for use in telecom and industrial isolated loop protection circuits per Underwriters Laboratories standards. |
Pinout & Package
Package: Axial-leaded Surmetic plastic case (Case 41A), void-free transfer-molded thermosetting material, Pb-free external finish, cathode indicated by polarity band. Mounting position: any.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to ground or low-impedance return path; carries full surge current during transient events. |
| Cathode | Protected circuit node connection | Connected to the line or signal being protected; voltage at this terminal is clamped to VC during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Validated for IEC 61000-4-5 surge immunity testing up to 4 kV line-to-ground with 2 Ω source impedance. |
| UL 497B recognition | Qualified for safety-critical isolated loop applications including analog sensor interfaces and RS-485 fieldbus protection. |
| Class 3 HBM ESD rating | Withstands >16 kV human-body-model discharges without degradation-critical for handling-sensitive industrial control modules. |
| Low zener impedance | Ensures stable clamping voltage across varying surge currents, minimizing voltage overshoot on protected nodes. |
| Pb-free Surmetic package | RoHS-compliant axial lead construction with corrosion-resistant finish and solderability verified at 230°C for 10 seconds. |
Applications
| Industrial Power Supply Input Protection | RS-485 Communication Line Protection |
|---|---|
Use Scenario: AC/DC power supply front-end subjected to lightning-induced surges on mains input lines. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between L/N and earth ground to clamp common-mode transients. Use Value: Limits peak voltage to ≤92 V during 1500 W surges, preventing damage to bridge rectifier, bulk capacitor, and primary-side controller ICs. |
Use Scenario: RS-485 transceiver interface exposed to ESD and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional protection not required; single 1N6291ARL4 used on A/B lines referenced to local ground to suppress negative-going transients. Use Value: Sub-1 ns response prevents latch-up in MAX1487-level transceivers while UL 497B certification supports certified fieldbus installations. |
| Motor Drive DC Bus Snubbing | Medical Equipment Signal Isolation Barrier |
Use Scenario: DC link capacitor in 3-phase inverter subject to IGBT switching transients and load dump spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 100–500 µs overvoltage spikes across bus rails. Use Value: 1500 W rating handles short-duration regenerative energy spikes without thermal runaway; 20 °C/W RJL enables reliable heat sinking via PCB copper pour. |
Use Scenario: Analog sensor signal conditioning circuitry in patient-connected diagnostic devices requiring reinforced isolation. IC Role / Device Role / Timing Role: Primary-side TVS protecting op-amp inputs upstream of optocoupler or capacitive isolation barrier. Use Value: UL 497B recognition confirms compliance with medical isolation barrier requirements; <5 µA leakage avoids signal offset errors in µA-level sensor paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Surface-mount SMB package; lower 64 V VRWM; 600 W PPK rating. | Designed for space-constrained PCBs; lacks UL 497B recognition and axial lead mechanical robustness. | Select when board area is limited and surge threat level is ≤600 W; verify layout clearance for SMB thermal relief. |
| 1.5KE68A | Same electrical specs and case 41A package; identical marking except for manufacturer prefix (ON Semi vs. generic JEDEC). | No functional difference; 1.5KE68A is the ON Semiconductor proprietary part number for the same die and assembly. | 1N6291ARL4 and 1.5KE68A are functionally identical and interchangeable; choose based on distributor stock and tape-and-reel packaging preference. |
Compared with SMBJ64A, 1N6291ARL4 offers 2.5× higher surge power handling and UL certification for safety-critical loops; compared with 1.5KE68A, it is the exact same device-only differing in JEDEC vs. ON Semi branding and reel packaging configuration (RL4 = 1500/tape & reel).
Availability
1N6291ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication systems, and motor drive DC bus protection requiring stable component supply and long-term obsolescence management.
Supply support for 1N6291ARL4 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 onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1N6291ARL4 belongs to the 1N6267A Series Mosorb TVS family, engineered specifically for high-reliability, high-surge industrial and communications infrastructure applications where UL recognition and axial mechanical robustness are mandatory.
FAQ
What is the clamping voltage of the 1N6291ARL4 at its rated peak pulse current?
The 1N6291ARL4 clamps to a maximum of 92 V at its rated peak pulse current of 16.3 A (1 ms exponential waveform). This value is measured per Figure 5 in the official ON Semiconductor datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. Designers must ensure this clamping voltage remains below the absolute maximum ratings of downstream components. The 1N6291ARL4 achieves this performance using silicon avalanche junction technology with low dynamic impedance.
Is the 1N6291ARL4 RoHS compliant and lead-free?
Yes, the 1N6291ARL4 features a Pb-free external lead finish, as explicitly stated in the "Mechanical Characteristics" section of the ON Semiconductor datasheet. The device meets RoHS Directive 2011/65/EU requirements, and its Surmetic axial package uses corrosion-resistant, readily solderable leads qualified for 230°C for 10 seconds. No lead-containing materials are used in the external terminations of the 1N6291ARL4.
Does the 1N6291ARL4 have UL recognition, and for what standard?
Yes, the 1N6291ARL4 carries UL recognition under standard UL 497B (File #116110, Category QVGV2) for protectors in isolated loop circuits. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, temperature cycling, dielectric withstand, and discharge performance. UL 497B recognition is critical for industrial and medical applications requiring certified surge protection on signal or power isolation boundaries.
What is the difference between 1N6291ARL4 and 1.5KE68A?
The 1N6291ARL4 and 1.5KE68A are functionally identical devices from ON Semiconductor-same silicon die, same Case 41A package, same electrical specifications (VRWM = 58.1 V, VBR = 68 V, VC ≤ 92 V), and same UL 497B recognition. The distinction lies only in naming convention: 1N6291A follows JEDEC registration, while 1.5KE68A is ON Semiconductor's proprietary part number. Both share the "RL4" suffix indicating 1500-unit tape-and-reel packaging. The 1N6291ARL4 is fully interchangeable with 1.5KE68A.
Can the 1N6291ARL4 be used for bidirectional transient suppression?
No, the 1N6291ARL4 is strictly unidirectional and must not be used for bidirectional protection. It conducts only during negative transients on the cathode (i.e., when cathode voltage drops below anode). For bidirectional applications-such as AC line protection or symmetric data lines-ON Semiconductor offers the 1.5KE68CA series, which adds a "CA" suffix and contains back-to-back diodes. Using 1N6291ARL4 in place of a bidirectional TVS would leave positive-going transients unclamped and risk system failure.
1N6291ARL4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6291ARL4 FAQ
1.How can I place an order for 1N6291ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6291ARL4 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 1N6291ARL4 reliable?
The price and inventory of 1N6291ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6291ARL4 is usually 5 days.
3.What payment methods are accepted for 1N6291ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6291ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6291ARL4?
1N6291ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6291ARL4 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 1N6291ARL4?
For technical support, including 1N6291ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6291ARL4 requirements.
6.How does Aetrix verify that 1N6291ARL4 is sourced from the original manufacturer or authorized distributors?
All 1N6291ARL4 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 1N6291ARL4 meets industry standards.
7.What is the process for return or replacement of 1N6291ARL4?
All 1N6291ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6291ARL4, 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 1N6291ARL4 part is unused and in its original packaging.
Return procedure for 1N6291ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6291ARL4 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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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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