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onsemi 1N6294ARL4
- Part No.:
- 1N6294ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6294ARL4.pdf
- Description:
- TVS DIODE 77.8VWM 125VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,082
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Product details
Overview
1N6294ARL4 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 transients. It features a working peak reverse voltage (VRWM) of 77.8 V, clamping voltage (VC) of 125 V at 12 A peak pulse current (IPP), and sub-1 ns response time. It is used in industrial power supplies, communication line interfaces, and medical equipment surge protection circuits.
For engineers reviewing the 1N6294ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating DC voltage, VC vs. protected IC's absolute maximum rating, surge current capability under IEC 61000-4-5 waveform, and UL 497B recognition for isolated loop protection.
Technical Context
This device operates as a voltage-clamping avalanche diode, triggered when reverse voltage exceeds its breakdown threshold (VBR = 86.5–95.5 V). Its low dynamic impedance ensures stable clamping during 1 ms 1500 W surges, with thermal resistance (RJL = 20 °C/W) enabling reliable heat dissipation through axial leads.
Designed for unidirectional protection only, it exhibits <5 µA leakage above 10 V and ESD robustness >16 kV per HBM. Its Surmetic axial leaded package (Case 41A) supports manual or automated insertion and meets UL 497B for isolated loop circuit protection - a critical requirement in telecom and process control interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 77.8 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC bus or signal swing. |
| VBR @ IT=1 A | 86.5–95.5 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPP=12 A | 125 V - Clamped voltage during full 1500 W surge; must stay below protected IC's absolute max rating. |
| PPK | 1500 W @ 1 ms - Peak pulse power handling per non-repetitive surge; validated per Figure 5 waveform. |
| Response Time | <1 ns - Avalanche turn-on delay; enables suppression before transient energy damages downstream CMOS/MOS devices. |
| IR @ VRWM | <5 µA - Reverse leakage at rated working voltage; ensures minimal standby power loss and signal integrity. |
| UL Recognition | UL 497B QVGV2 - Certified for use in isolated loop protectors; validates reliability under sustained overvoltage and endurance testing. |
Pinout & Package
1N6294ARL4 uses an axial-leaded plastic package (Case 41A), with cathode identified by a polarity band. Leads are tin-plated, solderable at 230°C for 10 seconds at 1/16″ from case. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for clamping | Connected to ground or low-impedance return path; establishes reference for reverse-biased operation. |
| Cathode | Protected line input | Connected to line being protected (e.g., DC supply rail or signal trace); conducts surge current to ground when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without degradation when properly mounted. |
| UL 497B recognition | Validates suitability for safety-critical isolated loop protection in telecom and industrial control systems. |
| ESD rating >16 kV (HBM) | Survives electrostatic discharge events common in handling and board assembly without parameter shift. |
| Low zener impedance | Maintains tight VC tolerance across temperature and aging, ensuring consistent clamping performance. |
| Pb-free external lead finish | Complies with RoHS Directive 2011/65/EU; compatible with standard SnPb and lead-free reflow/soldering processes. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 48 V DC telecom power feed subjected to lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across input terminals to divert surge energy to chassis ground before reaching DC-DC converter ICs. Use Value: Limits transient voltage to ≤125 V, protecting 100 V-rated input MOSFETs and controller ICs per IEC 61000-4-5 Ed. 3. |
Use Scenario: RS-485 data lines exposed to EFT bursts in factory automation networks. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential pair (A/B) referenced to local ground, suppressing common-mode transients. Use Value: Sub-1 ns response prevents data corruption during 5 kHz EFT bursts; UL 497B certification supports safety isolation requirements. |
| Medical Equipment Input Stage | Process Control Sensor Interface |
Use Scenario: AC/DC adapter input stage in Class II medical devices requiring reinforced insulation. IC Role / Device Role / Timing Role: Primary-side TVS across bridge rectifier output to absorb line-switching transients and capacitor charge spikes. Use Value: 1500 W rating handles repetitive 100 µs surges from inductive load switching; UL 497B supports regulatory compliance for patient-connected systems. |
Use Scenario: 4–20 mA current loop input receiving signals from remote pressure/temperature sensors in oil & gas plants. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1N6294ARL4 clamps positive-going transients on loop supply rail. Use Value: 77.8 V VRWM matches typical 24 V loop supply with 3× safety margin; low leakage avoids loop current error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ78A | Surface-mount SMC package; 78 V VRWM; 1000 W PPK; 135 V VC @ 7.4 A. | Requires PCB redesign for SMD layout; lower surge rating limits use in high-energy environments. | Select when space-constrained designs prioritize footprint over 1500 W capability. |
| 1.5KE91A | Same die, identical electrical specs, but in bulk box packaging (not tape & reel); same Case 41A axial package. | No functional difference; differs only in logistics format - 1500/reel vs. 500/box. | Choose 1.5KE91A for prototyping or low-volume hand-soldering; 1N6294ARL4 for automated assembly. |
Compared with SMBJ78A, 1N6294ARL4 delivers 50% higher surge power and axial-leaded ease of through-hole replacement, while 1.5KE91A offers identical protection in a different packaging format - making 1N6294ARL4 optimal for high-reliability, high-volume production with tape-and-reel feeding.
Availability
1N6294ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure, medical equipment, and process control systems requiring stable component supply and certified surge protection.
Supply support for 1N6294ARL4 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 part of onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N6294ARL4 belongs to the 1N6267A Series Mosorb TVS family, engineered specifically for high-reliability, high-surge industrial and communications protection where UL 497B certification and axial-leaded serviceability are essential.
FAQ
What is the clamping voltage of the 1N6294ARL4 under maximum surge conditions?
The 1N6294ARL4 clamps to 125 V when subjected to its rated peak pulse current of 12 A (corresponding to 1500 W at 1 ms). This value is measured per the standard 10/1000 µs waveform and is guaranteed across temperature and production lot variations. The 1N6294ARL4 maintains this clamping performance due to its low dynamic impedance and optimized junction design.
Is the 1N6294ARL4 suitable for bidirectional transient protection?
No, the 1N6294ARL4 is strictly unidirectional and must be connected with cathode toward the protected line. For bidirectional protection, ON Semiconductor offers the 1.5KE91CA variant - which shares the same VBR and VC ratings but conducts in both directions. Using 1N6294ARL4 in reverse-biased configurations will not provide clamping on negative transients.
Does the 1N6294ARL4 meet RoHS and lead-free requirements?
Yes, the 1N6294ARL4 features a Pb-free external lead finish, fully compliant with EU RoHS Directive 2011/65/EU. Its Surmetic plastic package and lead plating are qualified for both SnPb and lead-free soldering processes, with maximum solder temperature specified at 230°C for 10 seconds at 1/16″ from the case.
How does UL 497B recognition benefit designs using the 1N6294ARL4?
UL 497B recognition confirms that the 1N6294ARL4 has passed rigorous tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge cycling - specifically for use in isolated loop protectors. This certification simplifies end-equipment safety approvals in telecom, industrial control, and medical systems where galvanic isolation integrity is mandated.
What is the maximum allowable reverse leakage current for the 1N6294ARL4 at its working voltage?
The 1N6294ARL4 specifies a maximum reverse leakage current (IR) of 5 µA when biased at its working peak reverse voltage of 77.8 V. This low leakage ensures minimal power loss and avoids interference with precision analog or low-current sensor circuits - a critical factor in battery-powered or high-impedance signal chain applications.
1N6294ARL4 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- 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
1N6294ARL4 FAQ
1.How can I place an order for 1N6294ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6294ARL4 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 1N6294ARL4 reliable?
The price and inventory of 1N6294ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6294ARL4 is usually 5 days.
3.What payment methods are accepted for 1N6294ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6294ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6294ARL4?
1N6294ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6294ARL4 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 1N6294ARL4?
For technical support, including 1N6294ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6294ARL4 requirements.
6.How does Aetrix verify that 1N6294ARL4 is sourced from the original manufacturer or authorized distributors?
All 1N6294ARL4 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 1N6294ARL4 meets industry standards.
7.What is the process for return or replacement of 1N6294ARL4?
All 1N6294ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6294ARL4, 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 1N6294ARL4 part is unused and in its original packaging.
Return procedure for 1N6294ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6294ARL4 Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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