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onsemi 1N6291A
- Part No.:
- 1N6291A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6291A.pdf
- Description:
- TVS DIODE 58.1VWM 92VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,815
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Product details
Overview
1N6291A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against high-energy surges. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V @ IT = 1 mA), 92 V maximum clamping voltage (VC) at 16.3 A peak pulse current (IPP), and sub-1 ns response time - deployed in power supply input stages, industrial control I/O lines, and telecom surge interfaces.
For engineers reviewing the 1N6291A datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (VRWM = 58.1 V), low zener impedance, UL 497B recognition for isolated loop circuits, and axial leaded Surmetic CASE 41A packaging suitable for through-hole PCB mounting and high-reliability industrial environments.
Technical Context
The 1N6291A operates as a silicon avalanche diode with unidirectional polarity, leveraging controlled Zener breakdown to clamp transients above its VRWM. Its thermal resistance (RJL = 20 °C/W) and 175 °C max junction temperature enable robust operation under repeated surge stress when mounted with ≥3/8″ lead length.
It delivers 1500 W peak pulse power (tP = 1 ms, non-repetitive) per Figure 5 waveform, with clamping performance validated at IPP = 16.3 A and VC = 92 V. Leakage current remains below 5 µA at 58.1 V, and ESD rating exceeds 16 kV (HBM Class 3).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58.1 V - Maximum continuous reverse operating voltage before clamping initiates; sets minimum system DC bus or signal rail rating. |
| VBR @ IT=1 mA | 64.6–71.4 V - Breakdown voltage tolerance band; defines precise turn-on threshold for surge detection. |
| VC @ IPP=16.3 A | 92 V - Maximum clamped voltage during 1 ms surge; determines protected circuit's overvoltage margin. |
| PPK | 1500 W - Peak transient power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge compliance. |
| Response Time | <1 ns - Avalanche turn-on speed; ensures clamping occurs before downstream ICs experience destructive overvoltage. |
| IR @ VRWM | <5 µA - Reverse leakage at rated working voltage; minimizes standby power loss in high-impedance circuits. |
| UL Recognition | UL 497B QVGV2 - Certified for isolated loop circuit protection; validates safety compliance in telecom and industrial interfaces. |
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 forward conduction | Connected to ground or low-impedance return path; enables bidirectional surge shunting only when paired with complementary device. |
| Cathode | Transient voltage reference node | Connected to protected line (e.g., +12 V rail); clamps voltage to ≤92 V when transient exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports high-energy surge standards (IEC 61000-4-5) without derating in short-duration events. |
| UL 497B certification | Validated for isolated loop protection in telecom and process control systems requiring safety agency approval. |
| ESD rating >16 kV (HBM) | Eliminates need for additional ESD protection on board-level interfaces exposed to human handling. |
| Low zener impedance | Ensures stable clamping voltage across varying surge currents - critical for protecting CMOS/MOS inputs. |
| Sub-1 ns response time | Clamps transients before propagation delay of typical interface ICs (e.g., RS-485 transceivers) causes damage. |
Applications
| Industrial Power Supply Input Protection | RS-485 Communication Line Clamping |
|---|---|
|
Use Scenario: 24 V DC industrial power entry subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive transients to ≤92 V. Use Value: Prevents damage to upstream rectifier diodes and downstream DC-DC controllers by limiting surge voltage within safe operating area. |
Use Scenario: Factory automation network with RS-485 nodes connected via 100 m twisted-pair cables. IC Role / Device Role / Timing Role: 1N6291A installed on A/B differential lines referenced to local ground to suppress common-mode surges. Use Value: Maintains data integrity by clamping induced transients before they exceed RS-485 receiver input absolute maximum ratings (±12 V). |
| Medical Equipment AC/DC Adapter Interface | Programmable Logic Controller (PLC) Digital Input Protection |
|
Use Scenario: External AC/DC adapter input to patient-monitoring device with strict safety isolation requirements. IC Role / Device Role / Timing Role: TVS positioned at primary-side AC input to absorb fast-rising line transients before isolation barrier. Use Value: Complies with UL 497B for isolated loop protection while preventing insulation stress that could compromise patient safety. |
Use Scenario: 24 V digital input channel on PLC module receiving signals from field sensors over unshielded wiring. IC Role / Device Role / Timing Role: 1N6291A connected between input terminal and chassis ground to shunt inductive switch-off spikes. Use Value: Extends relay and optocoupler lifetime by limiting voltage overshoot during inductive load switching (e.g., solenoid de-energization). |
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 (3.5 × 4.6 mm), lower PPK = 600 W, VC = 103 V @ 5.8 A | Better suited for space-constrained PCBs; not UL 497B recognized | Select when board real estate is limited and UL certification is not required. |
| 1.5KE68A | Same die, identical electrical specs, alternate ON Semiconductor part number; identical CASE 41A package | No functional or mechanical difference - dual-marking variant for same production lot | Direct form-fit-function replacement; interchangeable in BOMs and procurement. |
Compared with SMBJ64A, the 1N6291A offers higher surge robustness (1500 W vs. 600 W) and UL 497B compliance but requires axial through-hole mounting; compared with 1.5KE68A, it is electrically and mechanically identical - differing only in JEDEC marking convention.
Availability
1N6291A is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, and medical equipment AC/DC adapters requiring stable component supply and certified surge protection.
Supply support for 1N6291A 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N6291A belongs to the Mosorb™ 1N6267A Series of unidirectional TVS diodes, engineered for high-reliability transient suppression in harsh industrial and telecom environments where UL recognition and surge endurance are mandatory.
FAQ
What is the clamping voltage of the 1N6291A at its rated peak pulse current?
The 1N6291A has a maximum clamping voltage (VC) of 92 V when subjected to its rated peak pulse current of 16.3 A (tP = 1 ms). This value is measured per the standard 10/1000 µs waveform defined in Figure 5 of the datasheet and represents the upper limit of voltage seen by protected circuitry during a full-rated surge event. The 1N6291A maintains this clamping performance across its specified operating temperature range.
Is the 1N6291A RoHS compliant and lead-free?
Yes, the 1N6291A is manufactured with a Pb-free external lead finish, as explicitly stated in the "Mechanical Characteristics" section of the datasheet. It complies with RoHS Directive 2011/65/EU and is suitable for lead-free soldering processes with a maximum lead temperature of 230°C for 10 seconds at 1/16 inch from the case. The device carries no lead content in its external terminations.
Does the 1N6291A have UL recognition, and for what standard?
Yes, the 1N6291A is UL recognized under standard UL 497B (File #116110, Category QVGV2) for isolated loop circuit protection. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming suitability for telecom, industrial control, and medical applications requiring third-party safety validation.
What is the maximum steady-state power dissipation for the 1N6291A?
The 1N6291A has a steady-state power dissipation (PD) of 5.0 W at lead temperature (TL) ≤ 75°C with 3/8 inch lead length. Above 75°C, it derates linearly at 20 mW/°C, reaching zero dissipation at 325°C - though practical operation is limited to TJ ≤ 175°C. This rating applies only to continuous DC or low-frequency conditions, not transient suppression duty cycles.
How does the 1N6291A differ from the 1.5KE68A?
The 1N6291A and 1.5KE68A are identical in electrical specifications, thermal performance, package (CASE 41A), and marking layout - differing only in JEDEC device code versus ON Semiconductor internal part numbering. Both share the same VRWM = 58.1 V, VBR = 64.6–71.4 V, VC = 92 V, and UL 497B recognition. The 1N6291A is the JEDEC-registered designation; 1.5KE68A is ON Semiconductor's proprietary code for the same device.
1N6291A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- 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
1N6291A FAQ
1.How can I place an order for 1N6291A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6291A 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 1N6291A reliable?
The price and inventory of 1N6291A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6291A is usually 5 days.
3.What payment methods are accepted for 1N6291A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6291A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6291A?
1N6291A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6291A 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 1N6291A?
For technical support, including 1N6291A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6291A requirements.
6.How does Aetrix verify that 1N6291A is sourced from the original manufacturer or authorized distributors?
All 1N6291A 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 1N6291A meets industry standards.
7.What is the process for return or replacement of 1N6291A?
All 1N6291A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6291A, 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 1N6291A part is unused and in its original packaging.
Return procedure for 1N6291A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6291A Tags
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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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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