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onsemi 1N6272A
- Part No.:
- 1N6272A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6272A.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,580
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Product details
Overview
1N6272A 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 9.4 V working peak reverse voltage (VRWM), 11 V nominal breakdown voltage (VBR), 15.6 V maximum clamping voltage (VC) at 96 A peak pulse current (IPP), and sub-1 ns response time. It is used in power supply input stages, industrial control I/O protection, and telecom line interfaces.
For engineers reviewing the 1N6272A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VDD, VRWM compatibility with DC operating voltage, surge current handling under 1 ms pulses, UL 497B certification for loop circuit protection, and axial leaded Surmetic package thermal performance.
Technical Context
The 1N6272A operates as a silicon avalanche diode in reverse-biased mode, entering controlled breakdown when transient voltage exceeds its VBR of 11 V (min 10.5 V, max 11.6 V). Its low dynamic impedance ensures stable clamping at VC = 15.6 V under 96 A IPP, limiting energy delivered to downstream components.
It is rated for 1500 W nonrepetitive peak pulse power per 1 ms waveform (Figure 5), with thermal resistance RJL = 20 °C/W enabling effective heat transfer through leads. The device meets Class 3 ESD immunity (>16 kV HBM) and is UL 497B recognized for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 9.4 V - Maximum continuous reverse operating voltage; must be ≥ system DC bus or signal swing to avoid leakage conduction during normal operation. |
| VBR @ IT = 1 A | 10.5–11.6 V - Breakdown onset range; defines threshold where clamping begins under standardized test current. |
| VC @ IPP = 96 A | 15.6 V - Maximum clamped voltage seen by protected circuit during worst-case 1 ms surge; determines overvoltage stress on downstream ICs. |
| IPP | 96 A - Peak pulse current capability at 1 ms; defines surge energy absorption capacity (≈ 76.8 J). |
| IR @ VRWM | 5 µA - Reverse leakage at rated working voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| Response Time | < 1 ns - Avalanche turn-on speed; enables suppression before transient propagates into protected ICs. |
| Package | Case 41A axial leaded plastic - Standard DO-201AD outline; supports manual or wave soldering at 230°C for 10 s at 1/16″ from case. |
Pinout & Package
1N6272A uses an axial-leaded, polarity-band-marked Case 41A (DO-201AD) package. Cathode is identified by a colored band; anode is unmarked lead. Leads are tin-plated, corrosion-resistant, and readily solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias connection | Connected to ground or low-impedance return path; establishes reference for clamping action. |
| Cathode | Transient voltage input node | Connected to protected line (e.g., +12 V rail or RS-485 A/B); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without derating in typical PCB layouts. |
| UL 497B recognition | Validates suitability for safety-critical isolated loop circuits in medical and industrial control systems without additional certification effort. |
| ESD rating >16 kV HBM | Meets or exceeds IEC 61000-4-2 Level 4 requirements for system-level ESD immunity on external ports. |
| Pb-free G-suffix variant | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for automated assembly. |
| Low zener impedance | Ensures tight clamping voltage tolerance across temperature and current extremes, minimizing overvoltage margin design uncertainty. |
Applications
| Industrial PLC Digital Input Protection | AC-DC Power Supply Inrush & Surge Clamping |
|---|---|
Use Scenario: 24 V DC digital inputs on programmable logic controllers exposed to field wiring transients from relay coil de-energization or motor contactor switching. IC Role / Device Role: Unidirectional TVS placed between input terminal and common ground to clamp induced spikes before they reach input buffer ICs. Use Value: Limits voltage to ≤15.6 V during 96 A surges, protecting 3.3 V/5 V logic buffers and ensuring reliable state detection without latch-up or damage. |
Use Scenario: Primary-side AC line input of offline switch-mode power supplies subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Parallel-connected TVS across bridge rectifier output or bulk capacitor to absorb differential-mode surge energy. Use Value: Clamps transient peaks to 15.6 V, preventing overvoltage failure of electrolytic bulk capacitors and primary-side MOSFETs rated for 25–50 V. |
| Telecom Line Interface Protection | Medical Equipment Signal Line Guarding |
Use Scenario: RS-485 data lines in building automation systems running alongside AC power cables, susceptible to coupled fast transients. IC Role / Device Role: Discrete TVS pair (one per line) referenced to local ground, suppressing common-mode surges before transceiver inputs. Use Value: Sub-1 ns response prevents data corruption during 1 kV/500 Ω surges; low capacitance (<100 pF) avoids signal edge degradation at 10 Mbps rates. |
Use Scenario: Analog sensor inputs (e.g., ECG front-end) in patient-connected devices requiring compliance with IEC 60601-1 creepage/clearance and surge immunity. IC Role / Device Role: Low-leakage (5 µA) TVS on signal path to limit fault voltage while maintaining microvolt-level signal fidelity. Use Value: UL 497B recognition validates use in protected loops; 9.4 V VRWM allows safe placement on ±5 V or 0–10 V sensor rails without forward conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | Surface-mount SMB package; 11.1 V VRWM; 17.0 V VC @ 84.5 A; 600 W rating. | Limited to lower-energy transients; requires PCB real estate optimization for thermal relief. | Select when board space is constrained and surge threat level is ≤ IEC 61000-4-5 Level 3 (2 kV/2 Ω). |
| 1.5KE11A | Same die, identical electrical specs; alternate JEDEC prefix; identical Case 41A package and marking. | No functional or mechanical difference; dual-source availability from same ON Semiconductor fab. | Choose for procurement flexibility or legacy BOM alignment where 1.5KE11A is already qualified. |
Compared with SMBJ11A, the 1N6272A delivers 2.5× higher surge energy handling in an axial package suited for high-current chassis connections; compared with 1.5KE11A, it offers identical protection performance with JEDEC-standardized part numbering preferred in aerospace and defense procurement.
Availability
1N6272A is available at Aetrix Electronics and suitable for industrial PLCs, AC-DC power supplies, telecom line interfaces, and medical equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N6272A 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 power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The 1N6272A belongs to the 1N6267A Series Mosorb TVS family, engineered specifically for high-reliability, high-energy transient suppression in harsh industrial and telecom environments where axial-leaded robustness and UL-certified loop protection are mandatory.
FAQ
What is the maximum clamping voltage of the 1N6272A under surge conditions?
The 1N6272A has a maximum clamping voltage (VC) of 15.6 V when subjected to its rated peak pulse current of 96 A with a 1 ms waveform. This value is guaranteed across temperature and represents the highest voltage that will appear across the protected circuit during a worst-case transient event, ensuring downstream components remain within safe operating limits.
Is the 1N6272A suitable for bidirectional signal line protection?
No, the 1N6272A is a unidirectional TVS diode and only provides protection against positive-going transients on the cathode side. For bidirectional protection-such as on AC lines or differential data buses like RS-485-use the complementary 1.5KE11CA or 1N6272CA, which are explicitly tested and rated for conduction in both directions.
Does the 1N6272A meet UL 497B requirements for isolated loop circuits?
Yes, the 1N6272A is UL 497B recognized (File #116110, QVGV2 category) for use in isolated loop circuit protection. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance-validating its reliability in safety-critical medical and process control applications.
What is the thermal resistance and steady-state power rating of the 1N6272A?
The 1N6272A 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 (TL) ≤ 75 °C. Derating is required above 75 °C at 20 mW/°C, making it suitable for ambient-temperature-limited applications but not continuous high-power dissipation.
How does the "G" suffix in 1N6272A-G affect compliance and assembly?
The "G" suffix in 1N6272A-G indicates a Pb-free (RoHS-compliant) version with matte tin lead finish. It supports standard SnPb and lead-free reflow profiles, has been qualified per JEDEC J-STD-020, and maintains identical electrical and thermal specifications as the non-G variant-enabling drop-in replacement in environmentally regulated production environments.
1N6272A 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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- 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
1N6272A FAQ
1.How can I place an order for 1N6272A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6272A 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 1N6272A reliable?
The price and inventory of 1N6272A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6272A is usually 5 days.
3.What payment methods are accepted for 1N6272A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6272A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6272A?
1N6272A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6272A 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 1N6272A?
For technical support, including 1N6272A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6272A requirements.
6.How does Aetrix verify that 1N6272A is sourced from the original manufacturer or authorized distributors?
All 1N6272A 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 1N6272A meets industry standards.
7.What is the process for return or replacement of 1N6272A?
All 1N6272A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6272A, 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 1N6272A part is unused and in its original packaging.
Return procedure for 1N6272A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6272A 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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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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