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onsemi 1N6287ARL4
- Part No.:
- 1N6287ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6287ARL4.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,021
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Product details
Overview
1N6287ARL4 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 40.2 V working peak reverse voltage (VRWM), 47 V breakdown voltage (VBR) at 1 mA test current, and clamps to 64.8 V at 23.2 A peak pulse current (IPP), making it suitable for DC power rail protection in industrial power supplies and communication interfaces.
For engineers reviewing the 1N6287ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VDD, surge current capability under 1 ms 8.3 ms half-sine waveform, UL 497B recognition for isolated loop circuits, and axial lead (Case 41A) mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a voltage-clamping Zener-based TVS, entering avalanche conduction when reverse voltage exceeds its specified VBR (44.7–49.4 V). Its low dynamic impedance and sub-1 ns response time enable fast suppression of transient energy before downstream components experience overvoltage stress.
Designed for single-polarity (cathode-banded) operation, it delivers 1500 W peak pulse power per 1 ms waveform per Figure 5, with thermal derating above 75°C lead temperature and steady-state dissipation limited to 5.0 W at TL ≤ 75°C. It meets Class 3 ESD immunity (>16 kV HBM) and UL 497B certification for telecom and process control isolation barriers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 40.2 V - Maximum continuous DC or peak AC voltage the device blocks without clamping; sets minimum operating voltage margin for protected circuitry. |
| Breakdown Voltage (VBR) | 47 V @ 1 mA - Voltage at which avalanche conduction begins; defines threshold for transient activation with ±5% tolerance (44.7–49.4 V). |
| Clamping Voltage (VC) | 64.8 V @ 23.2 A IPP - Maximum voltage seen by protected load during full-rated 1500 W transient; determines safe overvoltage headroom. |
| Peak Pulse Power (PPK) | 1500 W @ 1 ms - Energy-handling capacity per non-repetitive surge; validated per JEDEC standard waveform (Figure 5). |
| Leakage Current (IR) | <5 µA @ 40.2 V - Minimal standby power loss and signal integrity impact in high-impedance bias networks. |
| Response Time | <1 ns - Enables suppression before most CMOS/MOS ICs experience gate oxide damage from fast-rising transients. |
| ESD Rating | Class 3 (>16 kV HBM) - Confirmed robustness against human-body model electrostatic discharge events. |
Pinout & Package
1N6287ARL4 uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a colored band. Leads are tin-lead (Pb-free finish), solderable at 230°C for 10 seconds at 1/16″ from case body. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to system ground or low-impedance return path; forms clamping node with cathode. |
| Cathode | Transient voltage sensing & clamping node | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection in telecom and industrial control systems - eliminates need for separate safety certification testing. |
| Low Clamping Ratio (VC/VBR) | 1.38 - Tight voltage margin between activation and clamping ensures minimal overvoltage exposure to downstream ICs. |
| Pb-Free Lead Finish | Compliant with RoHS and JEDEC J-STD-020 reflow profiles - supports lead-free manufacturing without solderability compromise. |
| High Surge Robustness | 200 A forward surge rating (IFSM) - withstands repetitive inrush or fault currents without degradation. |
| Thermal Resistance (RJL) | 20 °C/W - Enables effective heat transfer from junction to lead, supporting sustained 5.0 W steady-state dissipation at TL ≤ 75°C. |
Applications
| Industrial Power Supply Protection | RS-485/422 Interface Protection |
|---|---|
Use Scenario: DC input stage of programmable logic controller (PLC) power module exposed to 1 kV/500 A lightning-induced surges on 24 V supply lines. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed across input filter capacitor to limit transient voltage to <65 V, protecting upstream rectifier and downstream DC-DC controller. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic rails by limiting overvoltage to 2.7× nominal 24 V rail, within IEC 61000-4-5 Level 3 immunity requirements. |
Use Scenario: Termination point of long-haul RS-485 bus in factory automation network subject to ESD events and ground potential differences. IC Role / Device Role / Timing Role: Line-to-ground TVS on A/B differential pair, referenced to local chassis ground, suppressing common-mode transients before receiver inputs. Use Value: Maintains signal integrity by clamping surges to <65 V while adding only ~10 pF capacitance at VRWM - avoids data rate degradation up to 10 Mbps. |
| Medical Equipment Input Filtering | Process Control Sensor Signal Conditioning |
Use Scenario: Auxiliary 12 V supply input to patient monitor front-end board, requiring compliance with UL 497B for isolated auxiliary circuits. IC Role / Device Role / Timing Role: Primary overvoltage protector on secondary-side SMPS output, certified per UL 497B QVGV2 file #116110 for protector classification. Use Value: Meets medical safety standards without external isolation components, reducing BOM count and enabling compact 4-layer PCB layout near connector entry point. |
Use Scenario: 4–20 mA current loop transmitter connected to hazardous-area field sensors, where inductive kickback from solenoid drivers induces transients on analog signal lines. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) TVS on signal return path, providing fail-safe clamping without perturbing precision 250 Ω shunt voltage measurement. Use Value: Ensures <±0.1% full-scale error contribution from leakage current at 20 mA loop current, preserving 16-bit DAC resolution in control outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A | Surface-mount DO-214AA package; 40 V VRWM; 64.5 V VC @ 23.2 A; 600 W PPK | Limited to lower-energy transients; requires SMT reflow and PCB space optimization | Select when board space is constrained and surge threat level is ≤600 W (e.g., consumer-grade interfaces). |
| 1.5KE47A | Same axial Case 41A package; identical electrical specs (40.2 V VRWM, 47 V VBR, 64.8 V VC); tape-and-reel variant differs only in packaging format (1.5KE47A = bulk box, 1N6287ARL4 = 1500/reel) | No functional difference; same UL 497B recognition and surge ratings | Choose 1.5KE47A for manual assembly or low-volume prototyping; 1N6287ARL4 preferred for automated pick-and-place production. |
Compared with SMBJ40A, 1N6287ARL4 offers 2.5× higher surge energy handling and through-hole mechanical robustness for industrial environments; compared with 1.5KE47A, it provides identical protection performance with optimized logistics for high-volume SMT line feeding.
Availability
1N6287ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, and medical equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N6287ARL4 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, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1N6267A Series - including 1N6287ARL4 - was engineered as a cost-effective, high-reliability Mosorb TVS family for ruggedized transient suppression in harsh electromagnetic environments, with emphasis on UL-certified isolation barrier protection.
FAQ
What is the maximum clamping voltage of the 1N6287ARL4 under rated surge conditions?
The 1N6287ARL4 clamps to a maximum of 64.8 V when subjected to its rated peak pulse current of 23.2 A (1500 W, 1 ms waveform per Figure 5). This value is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does the 1N6287ARL4 meet UL 497B certification for isolated loop protection?
Yes, the 1N6287ARL4 is UL 497B recognized under File #116110 for protector classification (QVGV2), covering isolation barrier applications in telecommunications and industrial control. This certification validates performance in strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing - not just flammability.
What is the thermal resistance and steady-state power rating of the 1N6287ARL4?
The 1N6287ARL4 has a junction-to-lead thermal resistance (RJL) of 20 °C/W and a steady-state power dissipation rating of 5.0 W at lead temperature (TL) ≤ 75°C. Power must be derated linearly above 75°C at 20 mW/°C, reaching zero at TL = 325°C per the datasheet's absolute maximum ratings table.
How does the 1N6287ARL4 differ from the 1.5KE47A in terms of electrical performance and packaging?
The 1N6287ARL4 and 1.5KE47A share identical electrical specifications - including 40.2 V VRWM, 47 V VBR, 64.8 V VC, and 1500 W PPK - and both use Case 41A axial packaging. The sole difference is packaging format: 1N6287ARL4 is supplied in 1500-unit tape-and-reel for automated assembly, whereas 1.5KE47A is offered in 500-unit bulk boxes.
What is the leakage current specification for the 1N6287ARL4 at its working peak reverse voltage?
The 1N6287ARL4 exhibits a maximum reverse leakage current (IR) of 5 µA when biased at its working peak reverse voltage of 40.2 V, measured at TA = 25°C. This low leakage ensures negligible power loss and signal loading in high-impedance monitoring or precision analog circuits.
1N6287ARL4 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- 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
1N6287ARL4 FAQ
1.How can I place an order for 1N6287ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6287ARL4 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 1N6287ARL4 reliable?
The price and inventory of 1N6287ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6287ARL4 is usually 5 days.
3.What payment methods are accepted for 1N6287ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6287ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6287ARL4?
1N6287ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6287ARL4 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 1N6287ARL4?
For technical support, including 1N6287ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6287ARL4 requirements.
6.How does Aetrix verify that 1N6287ARL4 is sourced from the original manufacturer or authorized distributors?
All 1N6287ARL4 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 1N6287ARL4 meets industry standards.
7.What is the process for return or replacement of 1N6287ARL4?
All 1N6287ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6287ARL4, 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 1N6287ARL4 part is unused and in its original packaging.
Return procedure for 1N6287ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6287ARL4 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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DESD5V0U1BA-7
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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