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onsemi 1N6275A
- Part No.:
- 1N6275A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6275A.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,566
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Product details
Overview
1N6275A 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 12.8 V working peak reverse voltage (VRWM), 15 V breakdown voltage (VBR) at 1 mA test current, 21.2 V clamping voltage (VC) at 71 A peak pulse current, and sub-1 ns response time. It is used in power supply input stages, industrial I/O interfaces, and telecom line cards.
For engineers reviewing the 1N6275A 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 operating voltage, surge current capability under 1 ms waveform, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1N6275A operates as a silicon avalanche diode in reverse-biased mode, entering controlled breakdown when transient voltage exceeds its VBR of 15 V (min). Its low dynamic impedance ensures stable clamping at VC = 21.2 V under 71 A IPP, limiting energy delivered to downstream circuitry.
It is housed in an axial-leaded Surmetic plastic package (Case 41A) with cathode band polarity marking, rated for 230°C soldering at 10 s, and complies with UL 497B for isolated loop protection - a requirement for telecom and process control safety certification.
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) | 12.8 V - maximum continuous DC or peak AC voltage before leakage rises significantly |
| Breakdown Voltage (VBR) | 14.3–15.8 V @ 1 mA - precise avalanche onset threshold for predictable clamping initiation |
| Clamping Voltage (VC) | 21.2 V @ 71 A IPP - maximum voltage seen by protected circuit during worst-case surge |
| Leakage Current (IR) | < 5 µA @ 12.8 V - negligible standby power loss and signal interference in low-power systems |
| Response Time | < 1 ns - fast enough to suppress ESD events before damage occurs to CMOS/MOS inputs |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level robustness |
Pinout & Package
Package: Axial-leaded Surmetic plastic case (JEDEC Case 41A), void-free thermosetting material, corrosion-resistant finish, cathode indicated by colored band. Mountable in any orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transient |
| Cathode | Avalanche clamping terminal / High-side connection | Connected to protected line (e.g., +12 V rail); conducts when voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - enables compliance in telecom and industrial safety-critical designs |
| Low Clamping Ratio (VC/VBR) | 1.41 (21.2 V / 15 V) - tight margin between breakdown and clamp ensures minimal overvoltage stress on protected ICs |
| Pb-Free Lead Finish | RoHS-compliant termination - supports lead-free reflow and hand-soldering without contamination risk |
| Thermal Resistance (RJL) | 20 °C/W - enables effective heat dissipation through leads during repetitive surge events |
| Steady-State Power Dissipation | 5.0 W @ TL ≤ 75°C - supports continuous operation in ambient-temperature-constrained enclosures |
Applications
| Industrial PLC Analog Inputs | AC-DC Power Supply Input Protection |
|---|---|
Use Scenario: Protecting 0–10 V analog input channels from field-wiring induced surges and ESD during sensor hot-plug. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input pin and ground, clamping transients before they reach precision op-amps or ADC front-ends. Use Value: Limits voltage excursion to ≤21.2 V, preserving integrity of 24 V-tolerant input buffers and preventing latch-up in downstream signal conditioning ICs. |
Use Scenario: Safeguarding primary-side rectifier outputs and secondary-side DC bus rails against lightning-induced surges and load-dump spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor terminals or after bridge rectifier to absorb energy before it propagates into regulation stage. Use Value: Absorbs up to 1500 W for 1 ms without degradation, maintaining output stability and avoiding overvoltage shutdown of PWM controllers like UC384x. |
| Telecom Line Interface Cards | Medical Equipment Signal Lines |
Use Scenario: Shielding RS-485/RS-232 data lines in outdoor base stations from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, referenced to local ground plane, with minimized trace inductance. Use Value: UL 497B recognition confirms suitability for isolated communication ports, ensuring compliance with IEC 60950-1 and GR-1089-CORE. |
Use Scenario: Protecting patient-connected ECG/EEG electrode inputs from defibrillator discharge coupling and ESD during handling. IC Role / Device Role / Timing Role: First-stage clamping device on isolated signal path, selected for low leakage (<5 µA) to avoid DC offset errors in high-gain instrumentation amplifiers. Use Value: Sub-1 ns response prevents transient propagation into isolation barrier, supporting IEC 60601-1 creepage/clearance requirements without compromising signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Surface-mount SMB package (vs. axial), lower 600 W PPK, same 15 V VBR range | Better suited for space-constrained PCBs; requires layout optimization for thermal relief | Select when board area is limited and surge duty cycle is low; verify thermal pad design per JEDEC Std. 51-3 |
| 1.5KE15A | Same die, identical electrical specs, alternate ON Semiconductor part number in same 1500 W series | No functional or mechanical difference - dual-marking variant for procurement flexibility | Direct form-fit-function replacement; preferred for new designs per ON Semiconductor's Preferred Devices list |
Compared with SMBJ15A, the 1N6275A delivers 2.5× higher surge power in axial format ideal for high-reliability chassis-mounted protection; compared with 1.5KE15A, it shares identical performance but differs only in JEDEC vs. ON proprietary marking - both are fully interchangeable in production.
Availability
1N6275A is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N6275A 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 medical markets.
The 1N6275A belongs to the Mosorb™ 1500 W TVS family, engineered specifically for high-reliability transient suppression in harsh environments where UL 497B compliance, low clamping ratio, and repeatable surge endurance are mandatory.
FAQ
What is the maximum clamping voltage of the 1N6275A under standard test conditions?
The 1N6275A has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current (IPP) of 71 A with a 1 ms exponential waveform. This value is measured per Figure 5 in the ON Semiconductor datasheet and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 24 V logic or analog ICs' absolute maximum ratings.
Is the 1N6275A RoHS compliant and lead-free?
Yes, the 1N6275A uses a Pb-free external lead finish as explicitly stated in the "Mechanical Characteristics" section of the datasheet. It meets RoHS Directive 2011/65/EU requirements and is compatible with lead-free soldering processes, including reflow profiles up to 230°C for 10 seconds at 1/16 inch from the case - verified in the manufacturer's Soldering and Mounting Techniques Reference Manual.
Does the 1N6275A have UL recognition, and for what standard?
Yes, the 1N6275A carries UL recognition under file #116110 for standard UL 497B, specifically for protectors in isolated loop circuits. This certification covers tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming suitability for telecom, process control, and medical isolation barrier applications where regulatory approval is required.
How does the 1N6275A differ from bidirectional TVS diodes like 1.5KE15CA?
The 1N6275A is unidirectional and protects only against positive transients on the cathode side relative to anode (ground), making it ideal for DC-powered lines with defined polarity. In contrast, 1.5KE15CA is bidirectional and clamps both polarities - useful for AC lines or differential buses like RS-485. The 1N6275A cannot substitute for bidirectional protection without circuit redesign, as it offers no suppression for negative-going surges.
What is the thermal resistance junction-to-lead (RJL) for the 1N6275A, and why does it matter?
The 1N6275A has a thermal resistance junction-to-lead (RJL) of 20 °C/W, meaning each watt of dissipated surge energy raises the junction temperature by 20°C above lead temperature. This parameter is essential for estimating safe surge repetition rates and verifying that transient energy does not exceed SOA limits - especially important in applications with frequent switching noise or repeated ESD events.
1N6275A 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- 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
1N6275A FAQ
1.How can I place an order for 1N6275A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6275A 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 1N6275A reliable?
The price and inventory of 1N6275A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6275A is usually 5 days.
3.What payment methods are accepted for 1N6275A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6275A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6275A?
1N6275A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6275A 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 1N6275A?
For technical support, including 1N6275A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6275A requirements.
6.How does Aetrix verify that 1N6275A is sourced from the original manufacturer or authorized distributors?
All 1N6275A 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 1N6275A meets industry standards.
7.What is the process for return or replacement of 1N6275A?
All 1N6275A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6275A, 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 1N6275A part is unused and in its original packaging.
Return procedure for 1N6275A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6275A Tags
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