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onsemi 1N6280A
- Part No.:
- 1N6280A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6280A.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,393
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Product details
Overview
1N6280A 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 24 V breakdown voltage (VBR = 22.8–25.2 V @ IT = 1 A), 33.2 V maximum clamping voltage (VC) at 45 A peak pulse current (IPP), and <1 ns response time - deployed in power supply input stages, industrial I/O interfaces, and telecom line cards.
For engineers reviewing the 1N6280A datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (VRWM = 20.5 V), low zener impedance, UL 497B recognition for isolated loop circuits, and axial leaded Surmetic CASE 41A package compatibility with through-hole PCB assembly and manual rework.
Technical Context
The 1N6280A operates as a silicon avalanche diode configured in unidirectional mode, leveraging controlled Zener breakdown to clamp transient overvoltages above its VRWM. Its 1500 W peak pulse power rating (1 ms, 10/1000 µs waveform) is sustained by low dynamic impedance and thermal resistance (RJL = 20 °C/W).
It delivers Class 3 ESD immunity (>16 kV HBM), exhibits <5 µA leakage at 10 V, and maintains stable VBR temperature coefficient (0.094 %/°C). The device is Pb-free, RoHS-compliant, and qualified per JEDEC standards for industrial temperature range (−65 °C to +175 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 20.5 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system DC bus or signal rail rating. |
| VBR @ IT = 1 A | 22.8–25.2 V - Breakdown voltage tolerance window; ensures predictable turn-on across production lots and temperature. |
| VC @ IPP = 45 A | 33.2 V - Clamped voltage during 1500 W surge; defines maximum stress on downstream ICs during worst-case transients. |
| IPP | 45 A - Peak pulse current capability at rated clamping voltage; validates robustness against IEC 61000-4-5 Level 4 surges. |
| Response Time | <1 ns - Avalanche turn-on speed; enables suppression before transient energy couples into protected circuitry. |
| Leakage Current @ VRWM | <5 µA - Minimal standby power loss and signal integrity impact in high-impedance monitoring or bias networks. |
| UL Recognition | UL 497B QVGV2 - Certified for isolated loop circuit protection; satisfies safety compliance for telecom and medical equipment. |
Pinout & Package
Package: Axial-leaded Surmetic plastic case (CASE 41A), void-free transfer-molded thermosetting material; cathode indicated by polarity band; lead finish Pb-free and solderable at 230 °C for 10 s (1/16″ from case).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward conduction; connected to system ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current; must be routed with minimal inductance to avoid clamping overshoot. |
| Cathode | High-impedance node under normal operation; becomes low-impedance clamp path during reverse overvoltage events. | Connected to protected line (e.g., DC input, RS-485 bus); determines polarity of suppression action. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe transients (e.g., 10/1000 µs surges up to 45 A) without external current sharing. |
| UL 497B certification | Validates suitability for safety-critical isolated loop applications including analog sensor inputs and fieldbus interfaces. |
| ESD rating >16 kV (HBM) | Eliminates need for supplemental ESD diodes in board-level ESD protection schemes for front-panel connectors. |
| Low zener impedance & fast response | Minimizes clamping voltage overshoot and ensures protection activation before logic-level ICs experience latch-up or damage. |
| Pb-free Surmetic package | Supports lead-free reflow and wave soldering while maintaining mechanical robustness and moisture resistance (MSL not applicable). |
Applications
| Industrial Power Supply Input Protection | RS-485/422 Data Line Protection |
|---|---|
Use Scenario: 24 V DC industrial power entry subjected to load dump and inductive kickback from solenoids or motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp positive-going transients. Use Value: Limits voltage to ≤33.2 V during 45 A surges, preventing damage to upstream rectifiers and downstream DC-DC controllers. |
Use Scenario: Long-haul RS-485 communication lines exposed to lightning-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Paired 1N6280A devices (one per line) referenced to local ground to suppress common-mode transients. Use Value: Maintains signal integrity by clamping differential and common-mode spikes within ±33.2 V, preserving receiver input thresholds. |
| Medical Equipment Isolated Sensor Inputs | Programmable Logic Controller (PLC) Digital I/O Protection |
Use Scenario: Low-voltage analog sensor signals (e.g., 0–10 V pressure transducer) crossing isolation barriers in patient-monitoring systems. IC Role / Device Role / Timing Role: TVS mounted at barrier interface to protect isolated ADC inputs from ESD and coupling noise. Use Value: UL 497B recognition confirms compliance for isolated loop protection, reducing safety certification effort. |
Use Scenario: 24 V digital input modules receiving dry-contact signals from field devices in harsh industrial environments. IC Role / Device Role / Timing Role: Front-end clamping element on each input channel, shunting surge energy to common ground. Use Value: Withstands repeated 1500 W transients without degradation, extending module service life and reducing field failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Surface-mount SMB package (3.5 × 3.5 mm), lower 600 W peak power, VC = 38.9 V @ 15.4 A. | Designed for automated SMT assembly; unsuitable for high-energy surges requiring >1500 W clamping. | Select when board space is constrained and surge threat level is moderate (e.g., IEC 61000-4-2 only). |
| 1.5KE24A | Same electrical specs and CASE 41A package; identical VRWM, VBR, VC, and IPP; dual-marking variant (ON Semiconductor part number synonym). | No functional or application difference; used interchangeably in BOMs and procurement. | Preferred for new designs due to ON Semiconductor's "Preferred device" designation and extended lifecycle support. |
Compared with SMBJ24A, the 1N6280A delivers 2.5× higher surge energy handling and axial-leaded reliability for manual repair; compared with 1.5KE24A, it shares identical performance but reflects legacy JEDEC marking - both are electrically and mechanically interchangeable in through-hole layouts.
Availability
1N6280A is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication systems, medical sensor interfaces, and PLC digital I/O modules requiring stable component supply, long-term manufacturability, and UL-recognized surge protection.
Supply support for 1N6280A 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N6280A belongs to the Mosorb™ 1N6267A Series of unidirectional TVS diodes engineered specifically for high-reliability transient suppression in industrial control, medical instrumentation, and communications infrastructure.
FAQ
What is the clamping voltage of the 1N6280A at its rated peak pulse current?
The 1N6280A has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 45 A (10/1000 µs waveform). This value is measured per Figure 5 in the official ON Semiconductor datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. Designers use this parameter to verify that downstream components remain within absolute maximum ratings under transient stress.
Is the 1N6280A suitable for bidirectional transient protection?
No, the 1N6280A is a unidirectional TVS diode and only clamps reverse-polarity transients (anode-to-cathode). For bidirectional protection, ON Semiconductor offers the 1.5KE24CA series - which shares the same VRWM and VC ratings but adds symmetrical clamping in both directions. Using 1N6280A in bidirectional applications risks failure during positive transients on the anode side, as it lacks forward conduction capability beyond its 3.5 V forward voltage rating.
Does the 1N6280A meet UL 497B requirements for isolated loop protection?
Yes, the 1N6280A is explicitly listed under UL 497B (File #116110, QVGV2 category) for isolated loop circuit protection. This certification covers testing for strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming its suitability in safety-critical applications such as medical sensor interfaces and industrial fieldbus isolators where galvanic separation must be maintained during surge events.
What is the thermal resistance junction-to-lead for the 1N6280A?
The 1N6280A has a thermal resistance of RJL = 20 °C/W from junction to lead, as specified in the "Maximum Ratings" table of the ON Semiconductor datasheet. This value enables accurate calculation of junction temperature rise under steady-state power dissipation (e.g., 5.0 W at TL ≤ 75 °C) and supports thermal design of PCB copper pour and lead length for reliable long-term operation in high-ambient environments.
How does the 1N6280A differ from the 1.5KE24A in terms of specifications and usage?
The 1N6280A and 1.5KE24A are electrically and mechanically identical parts - same VRWM (20.5 V), VBR (22.8–25.2 V), VC (33.2 V), IPP (45 A), CASE 41A package, and UL 497B recognition. They differ only in JEDEC vs. ON Semiconductor part numbering conventions; the 1.5KE24A is designated a "Preferred device" by ON Semiconductor, indicating prioritized manufacturing and longer-term availability, while 1N6280A remains fully compatible in all designs and procurement channels.
1N6280A 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- 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
1N6280A FAQ
1.How can I place an order for 1N6280A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6280A 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 1N6280A reliable?
The price and inventory of 1N6280A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6280A is usually 5 days.
3.What payment methods are accepted for 1N6280A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6280A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6280A?
1N6280A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6280A 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 1N6280A?
For technical support, including 1N6280A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6280A requirements.
6.How does Aetrix verify that 1N6280A is sourced from the original manufacturer or authorized distributors?
All 1N6280A 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 1N6280A meets industry standards.
7.What is the process for return or replacement of 1N6280A?
All 1N6280A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6280A, 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 1N6280A part is unused and in its original packaging.
Return procedure for 1N6280A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6280A 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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onsemi
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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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Diodes Incorporated
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