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onsemi 1N6271AG
- Part No.:
- 1N6271AG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6271AG.pdf
- Description:
- TVS DIODE 8.55VWM 14.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,224
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Product details
Overview
1N6271AG from ON Semiconductor is a unidirectional 1500 W Mosorb transient voltage suppressor (TVS) diode in axial lead Surmetic plastic package, designed for parallel clamping protection of sensitive electronics. It features 8.55 V working peak reverse voltage (VRWM), 14.5 V clamping voltage (VC) at 103 A peak pulse current (IPP), and <1 ns response time - used to safeguard power supplies, industrial controls, and communication interfaces against ESD and lightning-induced surges.
For engineers reviewing the 1N6271AG datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. device withstand rating, UL 497B certification for isolated loop circuits, and thermal derating above 75°C ambient.
Technical Context
The 1N6271AG operates as a silicon avalanche diode with unidirectional polarity (cathode-banded), activated only during reverse overvoltage events. Its low zener impedance and fast turn-on enable sub-nanosecond response, while its 20 °C/W junction-to-lead thermal resistance supports sustained surge handling when mounted with 3/8″ lead length.
It complies with UL 497B for isolated loop circuit protection and meets Class 3 (>16 kV) HBM ESD rating. The device is rated for nonrepetitive 1500 W pulses (1 ms, 8.3 ms half-sine), with steady-state dissipation limited to 5.0 W at TL ≤ 75°C and derated linearly above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8.55 V - maximum continuous reverse operating voltage before clamping begins; must exceed system DC/peak AC voltage by ≥10%. |
| VC @ IPP | 14.5 V at 103 A - clamped voltage seen by protected circuit during worst-case transient; defines minimum IC withstand requirement. |
| IPP | 103 A - peak pulse current capability under 1 ms waveform; determines surge energy absorption (≈72 J). |
| Breakdown Voltage | 9.5–10.5 V @ 1 mA - statistical VBR range defining activation threshold; ensures consistent turn-on across production lots. |
| Leakage Current | <10 µA @ 8.55 V - negligible standby power loss and signal integrity impact in high-impedance bias networks. |
| Response Time | <1 ns - enables effective suppression of fast-rising transients (e.g., ESD, relay bounce) before downstream IC damage occurs. |
| Thermal Resistance | 20 °C/W (Junction-to-Lead) - requires adequate PCB copper pour or heatsinking for repeated surge duty cycles. |
Pinout & Package
1N6271AG uses an axial-leaded CASE 41A (Surmetic) plastic package with cathode indicated by a colored band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16″ from case. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lowest potential node; completes clamping path during reverse transient. |
| Cathode | High-side connection point | Banded terminal tied to protected line (e.g., VBUS, RS-485 A/B); conducts avalanche current into ground when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - satisfies safety compliance requirements for telecom and industrial fieldbus interfaces without additional external certification. |
| 1500 W Peak Pulse Power | Handles IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges with margin - eliminates need for multi-stage protection in many medium-energy applications. |
| Class 3 HBM ESD Rating | Withstands >16 kV human-body-model discharge - provides robust front-end immunity for exposed ports without supplemental ESD arrays. |
| Pb-Free Surmetic Package | RoHS-compliant axial construction with void-free molding and corrosion-resistant finish - ensures long-term reliability in humid or chemically aggressive environments. |
| Low Clamping Ratio (VC/VBR) | 14.5 V / 10 V ≈ 1.45 - tight voltage control minimizes overvoltage stress on downstream MOS/CMOS ICs during clamping. |
Applications
| Industrial Power Supply Input Protection | RS-485/422 Data Line Protection |
|---|---|
Use Scenario: 24 V DC industrial power input subjected to load dump and inductive switching transients up to 100 V/50 A. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp surges before they reach DC-DC converter input stage. Use Value: 1N6271AG's 14.5 V clamping voltage protects 36 V-rated input capacitors and MOSFETs while maintaining >10 V margin below their absolute max rating. | Use Scenario: Factory automation network with long RS-485 bus runs exposed to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Paired TVS devices (one per line) referenced to local ground, suppressing common-mode and differential transients on A/B lines. Use Value: Sub-1 ns response ensures clamping initiates before RS-485 transceiver input structures experience breakdown; UL 497B supports certified isolation barrier design. |
| Medical Equipment AC/DC Adapter Interface | Programmable Logic Controller (PLC) Digital I/O Protection |
Use Scenario: Mains-connected medical device adapter with SELV secondary output requiring reinforced insulation and surge immunity per IEC 60601-1. IC Role / Device Role / Timing Role: Secondary-side TVS on DC output rail to absorb coupling transients from primary-side surges or internal switching noise. Use Value: UL 497B recognition validates use in patient-connected equipment; low leakage (<10 µA) avoids compromising isolation test integrity. | Use Scenario: 24 V digital input module in PLC rack subjected to wiring errors, relay contact bounce, and nearby motor switching noise. IC Role / Device Role / Timing Role: Discrete TVS per channel, placed at connector entry point to shunt transients before optocoupler input LED. Use Value: 103 A IPP handles repetitive 100 A inductive kick events; axial package allows through-hole mounting with mechanical strain relief for field-wire connections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1.5KE10AG | Identical electrical specs and package; same ON Semiconductor device code with alternate JEDEC marking. | No functional difference; identical use cases and layout requirements. | Select 1.5KE10AG when tape-and-reel packaging (1500 units/reel) is required for automated assembly. |
| SMBJ10A | Surface-mount SMB package; 1000 W peak power; 17.0 V clamping at 58.8 A; higher VC and lower IPP than 1N6271AG. | Not suitable for high-energy surges exceeding 1000 W; preferred where board space is constrained and surge levels are moderate. | Choose SMBJ10A only if PCB real estate is critical and surge threat level is ≤IEC 61000-4-5 Level 3; verify VC margin against protected IC ratings. |
Compared with 1.5KE10AG (identical performance, different packaging format) and SMBJ10A (lower power, SMT-only), the 1N6271AG offers optimal balance of high-energy surge handling, through-hole mechanical robustness, and UL 497B certification for safety-critical industrial and medical interfaces.
Availability
1N6271AG is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication systems, medical device adapters, and programmable logic controller I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for 1N6271AG 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 is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete devices for automotive, industrial, cloud, and medical markets.
The 1N6271AG belongs to the 1N6267A Series Mosorb TVS family, engineered specifically for high-reliability, high-energy transient suppression in safety-certified industrial and communications infrastructure.
FAQ
What is the maximum working peak reverse voltage (VRWM) of the 1N6271AG?
The 1N6271AG has a VRWM of 8.55 V, meaning it remains non-conductive up to this reverse voltage under steady-state conditions. This value is selected to be ≥10% above typical 7–8 V nominal rails (e.g., 5 V logic with tolerance, 9 V battery systems) to avoid false triggering while ensuring reliable clamping onset during overvoltage events. Exceeding VRWM initiates avalanche conduction.
Does the 1N6271AG meet UL safety standards for circuit protection?
Yes, the 1N6271AG is UL Recognized under standard UL 497B (File #E210057) for isolated loop circuit protection. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing - confirming suitability for safety-critical applications such as telecom interfaces, medical equipment, and industrial fieldbus systems where regulatory compliance is mandatory.
What is the clamping voltage (VC) and peak pulse current (IPP) of the 1N6271AG?
The 1N6271AG delivers a clamping voltage (VC) of 14.5 V at a peak pulse current (IPP) of 103 A under the standardized 1 ms exponential waveform. This VC value defines the maximum voltage imposed on the protected circuit during surge events, and the 103 A IPP rating quantifies its ability to absorb high-energy transients like IEC 61000-4-5 surges without failure.
Can the 1N6271AG be used in surface-mount designs?
No, the 1N6271AG is exclusively offered in an axial-leaded CASE 41A (Surmetic) through-hole package and is not available in surface-mount form. For SMT implementations, engineers should consider functionally similar alternatives such as the SMBJ10A or SMCJ10A, which offer comparable VRWM but differ in power rating, clamping voltage, and package footprint - requiring full revalidation of layout and thermal performance.
How does the thermal derating of the 1N6271AG affect its continuous power handling?
The 1N6271AG is rated for 5.0 W steady-state power dissipation at lead temperature (TL) ≤ 75°C, with linear derating of 20 mW/°C above that point. At TL = 100°C, its usable continuous power drops to 4.5 W. This derating directly impacts reliability in high-ambient or high-power-dissipation scenarios, requiring careful attention to PCB copper area, airflow, and lead length (3/8″ specified) to maintain safe junction temperatures.
1N6271AG 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):
- 8.55V
- Voltage - Breakdown (Min):
- 9.5V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- 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
1N6271AG FAQ
1.How can I place an order for 1N6271AG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6271AG 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 1N6271AG reliable?
The price and inventory of 1N6271AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6271AG is usually 5 days.
3.What payment methods are accepted for 1N6271AG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6271AG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6271AG?
1N6271AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6271AG 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 1N6271AG?
For technical support, including 1N6271AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6271AG requirements.
6.How does Aetrix verify that 1N6271AG is sourced from the original manufacturer or authorized distributors?
All 1N6271AG 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 1N6271AG meets industry standards.
7.What is the process for return or replacement of 1N6271AG?
All 1N6271AG units undergo pre-shipment inspection (PSI). If there is an issue with 1N6271AG, 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 1N6271AG part is unused and in its original packaging.
Return procedure for 1N6271AG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6271AG Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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