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onsemi 1N6287A
- Part No.:
- 1N6287A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6287A.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,272
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Product details
Overview
1N6287A from ON Semiconductor is a unidirectional 1500 W Mosorb transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD and surge events. It features a 40.2 V working peak reverse voltage (VRWM), 47 V breakdown voltage (VBR) at 1 mA, 64.8 V maximum clamping voltage (VC) at 23.2 A peak pulse current (IPP), and sub-1 ns response time - deployed in power supply input stages, telecom line interfaces, and industrial control I/O protection.
For engineers reviewing the 1N6287A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, VRWM compatibility with DC bus voltage, UL 497B certification for isolated loop circuits, and axial leaded Surmetic package thermal performance under repetitive surge conditions.
Technical Context
The 1N6287A operates as a silicon avalanche diode in reverse-biased mode, entering conduction when transient voltage exceeds its specified VBR (44.7–49.4 V). Its low dynamic impedance ensures stable clamping during 1 ms 1500 W pulses, while its <1 ns intrinsic response time minimizes voltage overshoot before clamping engages.
Designed for unidirectional protection only, it exhibits forward voltage ≤3.5 V at 100 A and reverse leakage <5 µA above 10 V. Thermal resistance junction-to-lead is 20 °C/W, enabling 5.0 W steady-state dissipation at TL ≤75°C with 3/8″ lead length - critical for sustained surge duty cycles in industrial environments.
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 system operating voltage margin. |
| Breakdown Voltage (VBR) | 47 V @ 1 mA - Voltage at which avalanche conduction begins; defines turn-on threshold for transient suppression. |
| Clamping Voltage (VC) | 64.8 V @ 23.2 A IPP - Maximum voltage seen by protected circuit during 1 ms 1500 W surge; determines safe headroom for downstream ICs. |
| Peak Pulse Power (PPK) | 1500 W @ 1 ms - Single-event surge energy handling capacity per JEDEC test waveform; validates robustness against lightning-induced transients. |
| Response Time | <1 ns - Intrinsic diode switching speed; ensures clamping activation before transient peaks damage CMOS/MOS/Bipolar ICs. |
| ESD Rating | Class 3 (>16 kV) HBM - Confirms immunity to human-body-model electrostatic discharge, supporting safe handling in assembly lines. |
| UL Recognition | UL 497B (QVGV2) - Certified for use in isolated loop circuit protection, including telecom and process control safety-critical paths. |
Pinout & Package
1N6287A uses the axial-leaded CASE 41A Surmetic plastic package (JEDEC TO-204AA), with cathode indicated by a polarity band. Leads are Pb-free, solderable up to 230°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path / ground reference | Connected to system ground or low-impedance return; carries full surge current during clamping. |
| Cathode | Protected line connection | Connected to line being protected (e.g., DC input, signal line); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24–48 V DC rails without derating. |
| UL 497B recognition | Validates compliance for use in certified isolated loop protectors - required for industrial process controllers and medical equipment interfaces. |
| Low zener impedance | Maintains tight clamping voltage across 10–100 A surge range, reducing voltage overshoot on fast-rising transients (e.g., relay coil flyback). |
| Pb-free external lead finish | Meets RoHS Directive 2011/65/EU and J-STD-609A Class 3 moisture sensitivity requirements for automated assembly. |
| −65 °C to +175 °C operating range | Supports deployment in under-hood automotive ECUs, outdoor telecom cabinets, and high-temp industrial motor drives. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: 48 V DC telecom power feed exposed to lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between line and ground, activated within <1 ns to limit voltage to ≤64.8 V. Use Value: Prevents destruction of upstream DC/DC converter primary-side MOSFETs and secondary-side PMICs during 10/1000 µs surges up to 1500 W. |
Use Scenario: RS-485 data line in factory automation network subjected to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Line-to-ground transient clamp on differential pair, leveraging low capacitance (<100 pF @ VRWM) to avoid signal integrity degradation. Use Value: Maintains 10 Mbps data integrity while suppressing ±15 kV contact ESD per IEC 61000-4-2 without latch-up or parametric shift. |
| Medical Equipment I/O Isolation | Process Control Analog Sensor Input |
Use Scenario: Isolated analog front-end of patient monitoring device connected to external sensors via unshielded cables. IC Role / Device Role / Timing Role: UL 497B-certified protector on isolated side of signal path, ensuring compliance with IEC 60601-1 creepage/clearance requirements. Use Value: Guarantees no hazardous voltage transfer across isolation barrier during 1 kV surge tests, preserving patient safety certification. |
Use Scenario: 4–20 mA current loop input in PLC analog module exposed to field wiring transients from solenoid switching. IC Role / Device Role / Timing Role: Low-leakage (<5 µA @ 40.2 V) TVS shunting induced spikes to ground, preserving loop accuracy during normal operation. Use Value: Enables <0.1% full-scale error contribution from protection circuitry, meeting SIL-2 functional safety requirements for process shutdown systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Lower peak power (600 W), SMC package (surface-mount), 43 V VRWM, 69.4 V VC @ 8.6 A | Targeted for PCB space-constrained designs; lacks UL 497B certification and axial lead thermal mass for high-duty-cycle surges | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3; verify thermal relief for repeated events. |
| 1.5KE47A | Same electrical specs and CASE 41A package; identical VRWM/VBR/VC/IPP values; manufactured by ON Semiconductor as dual-marking variant | No functional difference; used interchangeably in BOMs where legacy 1.5KE part numbering is preferred | Drop-in replacement with identical performance and qualification - suitable for dual-sourcing or obsolescence mitigation. |
Compared with SMBJ43A, the 1N6287A delivers 2.5× higher surge energy handling and certified isolation barrier compliance; compared with 1.5KE47A, it offers identical protection performance in the same axial package but with JEDEC-standardized marking for traceability in regulated industries.
Availability
1N6287A is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, and medical diagnostic devices requiring stable component supply with full regulatory documentation and long-term lifecycle support.
Supply support for 1N6287A 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 1N6287A belongs to the 1N6267A Series Mosorb TVS family, engineered specifically for high-reliability unidirectional surge protection in harsh environments - emphasizing UL 497B certification, high-temperature operation, and robust axial-package thermal performance.
FAQ
What is the clamping voltage of the 1N6287A at its rated peak pulse current?
The 1N6287A has a maximum clamping voltage (VC) of 64.8 V at its rated peak pulse current (IPP) of 23.2 A, measured using the standard 1 ms exponential decay waveform per Figure 5 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and must be verified against the absolute maximum ratings of downstream components to ensure safe operation.
Is the 1N6287A suitable for bidirectional transient protection?
No, the 1N6287A is a unidirectional TVS diode and is not rated for bidirectional surge suppression. It conducts only in reverse bias above VBR and blocks forward voltage up to 3.5 V. For bidirectional protection, ON Semiconductor offers the 1.5KE47CA series - a distinct part with symmetrical clamping in both polarities and different electrical test conditions.
Does the 1N6287A meet UL 497B requirements for isolated loop protection?
Yes, the 1N6287A is UL recognized under file QVGV2 to UL 497B for isolated loop circuit protection. This certification confirms successful completion of Strike Voltage Breakdown, Endurance Conditioning, Dielectric Withstand, and Discharge testing - making it suitable for use in safety-critical industrial and medical isolation barriers where regulatory compliance is mandatory.
What is the thermal resistance and steady-state power rating of the 1N6287A?
The 1N6287A has a thermal resistance of 20 °C/W from junction to lead and a steady-state power dissipation rating of 5.0 W at TL ≤75°C with 3/8″ lead length. Derating is linear above 75°C at 20 mW/°C, allowing reliable operation in ambient temperatures up to +175°C when mounted with adequate heatsinking or short leads.
How does the 1N6287A compare to the 1.5KE47A in terms of specifications and packaging?
The 1N6287A and 1.5KE47A are electrically identical - sharing the same VRWM (40.2 V), VBR (47 V), VC (64.8 V), IPP (23.2 A), and CASE 41A axial package. They differ only in JEDEC vs. ON Semiconductor part numbering conventions; both are manufactured by onsemi and qualify as drop-in replacements with identical reliability and test data.
1N6287A 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):
- 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
1N6287A FAQ
1.How can I place an order for 1N6287A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6287A 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 1N6287A reliable?
The price and inventory of 1N6287A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6287A is usually 5 days.
3.What payment methods are accepted for 1N6287A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6287A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6287A?
1N6287A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6287A 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 1N6287A?
For technical support, including 1N6287A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6287A requirements.
6.How does Aetrix verify that 1N6287A is sourced from the original manufacturer or authorized distributors?
All 1N6287A 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 1N6287A meets industry standards.
7.What is the process for return or replacement of 1N6287A?
All 1N6287A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6287A, 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 1N6287A part is unused and in its original packaging.
Return procedure for 1N6287A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6287A Tags
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