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onsemi 1N6267A
- Part No.:
- 1N6267A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6267A.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,825
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Product details
Overview
1N6267A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against high-energy transients. It features a 5.8 V working peak reverse voltage (VRWM), 10.5 V clamping voltage at 143 A peak pulse current, and <1 ns response time. It is used in power supplies, communication systems, and industrial controls to protect CMOS/MOS/Bipolar ICs from ESD and surge events.
For engineers reviewing the 1N6267A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. protected circuit's absolute maximum rating, VRWM alignment with DC operating voltage, surge current capability under 1 ms pulse, and UL 497B recognition for isolated loop protection compliance.
Technical Context
The 1N6267A operates as a silicon avalanche diode configured in unidirectional mode, leveraging controlled Zener breakdown to clamp transient overvoltages. Its low dynamic impedance (<1 Ω typical) ensures minimal voltage overshoot during fast-rising surges up to 143 A, while its 0.057 %/°C temperature coefficient of VBR maintains stable breakdown behavior across −65°C to +175°C junction temperature range.
It is optimized for single-pulse, non-repetitive surge suppression per IEC 61000-4-5 waveform equivalents, with thermal design governed by 20 °C/W junction-to-lead resistance and 5.0 W steady-state dissipation at TL ≤ 75°C. The device uses Surmetic axial-leaded plastic packaging (Case 41A) with Pb-free finish and cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage (VRWM) | 5.8 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC) | 10.5 V @ 143 A IPP - maximum voltage seen by protected circuit during rated surge |
| Breakdown Voltage (VBR) | 6.45–7.14 V @ 10 mA IT - precise Zener threshold enabling tight VRWM/VC margin control |
| Response Time | <1 ns - enables effective suppression of sub-nanosecond ESD events (HBM Class 3, >16 kV) |
| Leakage Current | <1000 µA @ VRWM - negligible standby power loss and signal integrity impact |
| UL Recognition | UL 497B QVGV2 - certified for isolated loop circuit protection in telecom and industrial interfaces |
Pinout & Package
Package: Axial-leaded plastic case (JEDEC Case 41A), void-free thermosetting material, Pb-free solderable leads, cathode indicated by color band. Dimensions: A = 8.5–9.5 mm (length), B = 4.8–5.3 mm (diameter), D = 0.96–1.06 mm (lead diameter).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-impedance return path in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., VCC, data line); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Surge robustness | 1500 W peak power handling per 1 ms pulse - protects against IEC 61000-4-5 Level 4 surges |
| Low clamping ratio | VC/VRWM ≈ 1.81 - tight voltage margin preserves headroom for downstream ICs rated to 12–15 V |
| ESD immunity | HBM Class 3 (>16 kV) - eliminates need for secondary ESD protection in many board-level designs |
| Thermal reliability | RJL = 20 °C/W - enables stable operation with minimal heatsinking in leaded through-hole mounting |
| Regulatory compliance | UL 497B recognized - satisfies safety requirements for telecom and industrial isolation barriers |
Applications
| AC/DC Power Supply Input Protection | RS-232/485 Interface Line Protection |
|---|---|
Use Scenario: Protecting primary-side rectifier outputs and secondary-side DC rails from lightning-induced surges and switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between rail and ground to shunt surge energy away from regulator ICs and capacitors. Use Value: Clamps 1500 W transients to ≤10.5 V, preventing overvoltage damage to 12 V-rated LDOs and electrolytic capacitors with 16 V WV rating. |
Use Scenario: Safeguarding UART transceivers and level shifters connected to long cables exposed to ESD and inductive coupling. IC Role / Device Role / Timing Role: Line-to-ground TVS on TX/RX lines to absorb HBM ESD strikes and 4 kV contact discharge per IEC 61000-4-2. Use Value: Sub-1 ns response limits voltage overshoot below transceiver's ±15 V abs max rating, preserving signal integrity during hot-plug events. |
| Medical Equipment Patient Monitoring Inputs | Industrial PLC Digital I/O Modules |
Use Scenario: Shielding analog front-end inputs (e.g., ECG, SpO₂ sensors) from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (≤1000 µA) TVS on sensor signal paths to avoid DC offset errors while providing ESD hardening. Use Value: Enables Class 3 HBM compliance without degrading microvolt-level signal accuracy or increasing input bias current error. |
Use Scenario: Protecting 24 V digital input circuits in programmable logic controllers from field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Rail-clamp TVS on optocoupler input side to divert 1 kV/500 A surge pulses per IEC 61000-4-4. Use Value: Maintains functional safety integrity by limiting voltage to ≤10.5 V, ensuring optocoupler LED remains within safe forward conduction range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Lower peak power (600 W), SMC package (surface-mount), VRWM = 5.0 V, VC = 9.2 V @ 65 A | Better suited for space-constrained PCBs; lower surge capacity requires derating in high-energy environments | Select when board area is limited and surge threat level is ≤600 W; verify layout inductance does not degrade clamping performance |
| 1.5KE6.8A | Same electrical specs (identical VRWM, VBR, VC, IPP), identical Case 41A package, ON Semiconductor dual-part-number designation | No functional or mechanical difference; used interchangeably in procurement and assembly | Preferred for new designs per ON Semiconductor documentation; identical form-fit-function replacement with enhanced traceability |
Compared with 1N6267A, SMBJ5.0A offers compact SMT integration but sacrifices 60% surge energy handling, while 1.5KE6.8A provides identical protection performance with preferred manufacturing traceability and tape-and-reel availability options.
Availability
1N6267A is available at Aetrix Electronics and suitable for AC/DC power supplies, industrial communication interfaces, and medical monitoring equipment requiring stable component supply and UL-recognized surge protection.
Supply support for 1N6267A 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 1N6267A belongs to the Mosorb™ TVS series engineered specifically for high-reliability, high-surge industrial and communications infrastructure applications where UL 497B certification and sub-1 ns response are mandatory.
FAQ
What is the clamping voltage of the 1N6267A at its rated peak pulse current?
The 1N6267A clamps to a maximum of 10.5 V at its rated peak pulse current of 143 A (1 ms exponential decay waveform). This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuits during worst-case surge events. Designers must ensure this clamping voltage remains below the absolute maximum rating of downstream components. The 1N6267A achieves this with low dynamic impedance and fast avalanche response.
Is the 1N6267A suitable for bidirectional transient suppression?
No, the 1N6267A is strictly a unidirectional TVS diode, designed for clamping positive transients relative to ground. It lacks symmetrical breakdown characteristics required for bidirectional protection. For applications needing suppression of both polarities (e.g., AC lines or differential data buses), ON Semiconductor offers the 1.5KE6.8CA series - which is electrically distinct and not interchangeable with the 1N6267A. Using the 1N6267A in bidirectional configurations risks catastrophic failure during negative-going surges.
Does the 1N6267A meet UL 497B requirements for isolated loop protection?
Yes, the 1N6267A is UL 497B recognized under file QVGV2 for protector classification, specifically validated for isolated loop circuit protection in telecommunications and industrial interfaces. This certification covers performance in strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing - exceeding basic flammability-only approvals held by many competitors. The 1N6267A's UL listing confirms suitability for safety-critical barrier applications where galvanic isolation integrity must be maintained during surge events.
What is the maximum steady-state power dissipation for the 1N6267A?
The 1N6267A has a steady-state power dissipation rating of 5.0 W at lead temperature (TL) ≤ 75°C with 3/8-inch lead length; it derates linearly at 20 mW/°C above that temperature. This rating applies only to continuous DC or low-frequency AC stress - not transient suppression duty. In normal operation, leakage current is <1000 µA above 10 V, resulting in negligible steady-state heating. The 5.0 W limit governs thermal design when the device is subjected to repeated or sustained overvoltage conditions outside its intended transient-clamping function.
How does the temperature coefficient affect the 1N6267A's breakdown voltage stability?
The 1N6267A has a maximum temperature coefficient of 0.057 %/°C for its breakdown voltage (VBR), meaning VBR increases by ≤0.057% per degree Celsius rise in junction temperature. Over its full operating range (−65°C to +175°C), this results in less than ±10% total VBR drift - ensuring predictable clamping behavior across extreme environments. This stability allows reliable use in automotive engine compartments or industrial enclosures without recalibration, and supports accurate VRWM selection for circuits with wide ambient temperature swings. The 1N6267A's low coefficient reflects precision Zener process control.
1N6267A 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- 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
1N6267A FAQ
1.How can I place an order for 1N6267A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6267A 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 1N6267A reliable?
The price and inventory of 1N6267A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6267A is usually 5 days.
3.What payment methods are accepted for 1N6267A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6267A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6267A?
1N6267A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6267A 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 1N6267A?
For technical support, including 1N6267A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6267A requirements.
6.How does Aetrix verify that 1N6267A is sourced from the original manufacturer or authorized distributors?
All 1N6267A 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 1N6267A meets industry standards.
7.What is the process for return or replacement of 1N6267A?
All 1N6267A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6267A, 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 1N6267A part is unused and in its original packaging.
Return procedure for 1N6267A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6267A Tags
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