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onsemi 1N6283A
- Part No.:
- 1N6283A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6283A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,723
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Product details
Overview
1N6283A 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 28.2 V working peak reverse voltage (VRWM), 33 V breakdown voltage (VBR) at 1 mA test current, and clamps to 45.7 V at 33 A peak pulse current (IPP), making it suitable for protecting power supply rails and I/O lines in industrial power supplies and communication interfaces.
For engineers reviewing the 1N6283A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, surge current handling under 1 ms pulses, UL 497B recognition for isolated loop protection, and axial leaded Surmetic package compatibility with through-hole PCB assembly.
Technical Context
The 1N6283A operates as a silicon avalanche diode in reverse-biased mode, entering conduction when transient voltage exceeds its specified breakdown threshold (VBR = 31.4–34.7 V). Its low dynamic impedance ensures stable clamping during 1 ms 1500 W pulses, with typical response time under 1 ns and thermal resistance of 20 °C/W from junction to lead.
Designed for unidirectional protection only, it exhibits <5 µA leakage above 10 V, ESD rating >16 kV per HBM, and complies with UL 497B for isolated loop circuit protection. The device is not rated for bidirectional operation and lacks symmetrical clamping characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - sustains single high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 28.2 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (VBR) | 33 V (min 31.4 V, max 34.7 V @ 1 mA) - precise avalanche onset for predictable protection threshold |
| Clamping Voltage (VC) | 45.7 V @ 33 A IPP - limits protected circuit voltage to safe level during surge |
| Leakage Current (IR) | <5 µA @ VRWM - negligible standby power loss and signal interference |
| Response Time | <1 ns - reacts faster than most system-level transients, minimizing overshoot |
| UL Recognition | UL 497B QVGV2 - certified for use in isolated loop protection circuits |
Pinout & Package
Package: Axial-leaded Surmetic plastic case (Case 41A), void-free transfer-molded thermosetting material, Pb-free external lead finish, cathode indicated by polarity band. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference terminal for reverse-biased operation | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | High-side connection point | Connected to protected line (e.g., VCC, data line); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems |
| UL 497B certification | Validates suitability for telecom and industrial isolated loop applications requiring safety agency approval |
| ESD rating >16 kV (HBM) | Provides immunity to human-body model electrostatic discharge events without external shielding |
| Low zener impedance | Ensures tight clamping voltage control across varying surge currents, reducing stress on downstream ICs |
| Fast response time <1 ns | Minimizes voltage overshoot before clamping engages, critical for protecting fast-switching logic and analog inputs |
Applications
| Industrial Power Supply Input Protection | RS-485/422 Data Line Clamping |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input rails to shunt surge energy to ground before reaching upstream regulators and microcontrollers. Use Value: Clamps 1500 W transients to ≤45.7 V, maintaining safe operating margin below 50 V-rated input capacitors and LDOs in the 1N6283A-protected power path. |
Use Scenario: Differential bus termination in factory automation networks where long cable runs induce lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired 1N6283A devices (one per line) referenced to local ground, providing asymmetric overvoltage clamping on A/B lines. Use Value: Limits differential and common-mode voltages to levels compatible with ISO/IEC 802.3-compliant transceivers while meeting UL 497B isolation requirements. |
| Medical Equipment Power Entry | Process Control Sensor Interface |
Use Scenario: AC/DC adapter output feeding isolated DC-DC converters in diagnostic imaging subsystems subject to EN 61000-4-4 EFT bursts. IC Role / Device Role / Timing Role: Secondary-side TVS on +24 V distribution rail, absorbing repetitive fast transients before they reach analog front-end ASICs. Use Value: With <5 µA leakage and 28.2 V VRWM, the 1N6283A avoids loading precision reference voltages while delivering sub-1 ns response to 5 kHz EFT noise. |
Use Scenario: 4–20 mA current loop interface in hazardous-area temperature transmitters exposed to field wiring faults and lightning coupling. IC Role / Device Role / Timing Role: Unidirectional clamp between loop supply and sense resistor, referenced to intrinsically safe barrier ground. Use Value: UL 497B recognition confirms compliance with intrinsic safety requirements for loop-powered devices, and 45.7 V clamping prevents op-amp saturation in the 1N6283A-protected signal chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A | Surface-mount SMB package; 28 V VRWM; 45.4 V VC @ 33.1 A; lower 600 W peak power | Requires PCB redesign for SMT placement; better suited for space-constrained consumer electronics | Select when board real estate is limited and surge requirements are ≤600 W |
| 1.5KE33A | Same JEDEC-spec family, identical electrical parameters, alternate ON Semiconductor part number; identical Case 41A package | No functional or mechanical difference; dual-marking variant used interchangeably in BOMs | Preferred for new designs due to ON Semiconductor's Preferred Device status and enhanced supply continuity |
Compared with SMBJ28A, the 1N6283A offers 2.5× higher surge power handling and axial-leaded through-hole mounting for high-reliability industrial assemblies; compared with 1.5KE33A, it shares identical specs but reflects legacy JEDEC nomenclature-both are electrically and mechanically interchangeable in existing designs.
Availability
1N6283A is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, and medical equipment requiring stable component supply with long-term lifecycle support.
Supply support for 1N6283A 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 management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1N6283A belongs to the Mosorb® 1500 W TVS diode family, engineered specifically for high-reliability transient suppression in harsh industrial environments where UL 497B compliance and robust surge immunity are mandatory.
FAQ
What is the clamping voltage of the 1N6283A under maximum surge conditions?
The 1N6283A clamps to 45.7 V when subjected to its rated peak pulse current of 33 A (1 ms waveform). This value is measured per Figure 5 in the official ON Semiconductor datasheet and represents the maximum voltage seen across the device during worst-case transient events, ensuring downstream components remain within safe operating limits.
Is the 1N6283A suitable for bidirectional signal line protection?
No, the 1N6283A is strictly unidirectional and must be used with correct polarity-cathode toward the protected line. For bidirectional protection (e.g., USB, CAN), use the "CA" suffix variants like 1.5KE33CA. Using the 1N6283A on AC or differential signals without external steering diodes will result in improper clamping or device failure.
Does the 1N6283A meet UL 497B requirements for isolated loop protection?
Yes, the entire 1N6267A series-including the 1N6283A-is UL Recognized under file #116110 for protector classification QVGV2 per UL 497B. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing, confirming suitability for telecom and industrial isolated loop applications.
What is the thermal resistance and steady-state power dissipation rating of the 1N6283A?
The 1N6283A has a junction-to-lead thermal resistance (RJL) of 20 °C/W and a steady-state power dissipation (PD) of 5.0 W at lead temperature ≤75 °C (with 3/8″ lead length). Derating is required above 75 °C at 20 mW/°C, making it unsuitable for continuous high-power dissipation but ideal for infrequent surge events.
Can the 1N6283A replace the 1.5KE33A in an existing design?
Yes-the 1N6283A and 1.5KE33A are electrically and mechanically identical: same VRWM (28.2 V), VBR (33 V), VC (45.7 V), Case 41A package, and axial lead configuration. They differ only in marking convention; the 1N6283A is the JEDEC-standard designation, while 1.5KE33A is ON Semiconductor's proprietary code. No layout or schematic changes are needed.
1N6283A 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- 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
1N6283A FAQ
1.How can I place an order for 1N6283A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6283A 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 1N6283A reliable?
The price and inventory of 1N6283A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6283A is usually 5 days.
3.What payment methods are accepted for 1N6283A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6283A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6283A?
1N6283A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6283A 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 1N6283A?
For technical support, including 1N6283A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6283A requirements.
6.How does Aetrix verify that 1N6283A is sourced from the original manufacturer or authorized distributors?
All 1N6283A 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 1N6283A meets industry standards.
7.What is the process for return or replacement of 1N6283A?
All 1N6283A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6283A, 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 1N6283A part is unused and in its original packaging.
Return procedure for 1N6283A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6283A Tags
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Nexperia USA Inc.
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