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onsemi 1N6274A
- Part No.:
- 1N6274A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6274A.pdf
- Description:
- TVS DIODE 11.1VWM 18.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,021
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Product details
Overview
1N6274A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a working peak reverse voltage (VRWM) of 11.1 V, clamping voltage (VC) of 18.2 V at 82 A peak pulse current (IPP), and sub-1 ns response time. It is commonly deployed in DC power rail protection for industrial power supplies and communication interface circuits.
For engineers reviewing the 1N6274A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. protected IC's absolute maximum rating, surge current capability under IEC 61000-4-5 waveform, and UL 497B recognition for isolated loop safety compliance.
Technical Context
The 1N6274A operates as a silicon avalanche diode with precise Zener-like breakdown behavior above its specified VBR (12.4–13.7 V @ 1 mA). Its low dynamic impedance ensures stable clamping during fast transients, while its Surmetic axial leaded package (Case 41A) provides robust thermal conduction to PCB leads.
It is rated for 1500 W non-repetitive peak pulse power (1 ms, 10/1000 µs waveform), supports 200 A forward surge current (8.3 ms half-sine), and exhibits <5 µA leakage at VRWM - enabling low-power standby compatibility. Its ESD rating exceeds 16 kV per Human Body Model (HBM), meeting IEC 61000-4-2 Level 4 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 11.1 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail by ≥10% for reliable margin. |
| VBR (min/typ/max) | 12.4 / 13.0 / 13.7 V @ 1 mA - Precise breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPP | 18.2 V @ 82 A - Clamped voltage seen by protected circuit during worst-case 1500 W surge; must stay below downstream IC's absolute max rating. |
| IPP | 82 A - Peak pulse current capability under 1 ms transient; correlates directly to IEC 61000-4-5 surge immunity level. |
| Response Time | <1 ns - Enables suppression of nanosecond-scale ESD events before damage occurs to CMOS/MOS inputs. |
| Leakage Current | <5 µA @ VRWM - Negligible standby power loss; suitable for battery-backed or low-quiescent systems. |
| UL Recognition | UL 497B QVGV2 - Certified for use in isolated loop telecom and industrial control protection circuits. |
Pinout & Package
1N6274A uses an axial-leaded, polarity-banded Surmetic plastic package (Case 41A), with cathode indicated by a band on the body. Leads are tin-plated, solderable at 230°C for 10 seconds at 1/16″ from case. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system ground or low-side return path; defines reference for clamping action. |
| Cathode | Protected-line terminal | Connected to line being protected (e.g., +12 V rail); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 12 V rails without derating. |
| ESD rating >16 kV HBM | Meets IEC 61000-4-2 Level 4 for direct contact discharge, eliminating need for additional ESD stages in front-end interfaces. |
| Low zener impedance | Maintains tight VC tolerance across temperature and current, ensuring consistent clamping performance in automotive and industrial environments. |
| Pb-free external lead finish | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles without requiring special soldering processes. |
| UL 497B recognition | Validates suitability for safety-critical telecom and process control isolation barriers without additional certification overhead. |
Applications
| Industrial Power Supply Input Protection | RS-485 Transceiver Bus Line Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamping diode placed between +24 V rail and chassis ground. Use Value: Limits transient voltage to ≤18.2 V during 82 A surges, protecting upstream DC/DC controller ICs rated for 20 V absolute max. |
Use Scenario: Differential bus lines (A/B) of RS-485 transceivers in factory automation networks subject to cable-induced lightning surges. IC Role / Device Role / Timing Role: Paired 1N6274A devices (cathode-to-line) provide line-to-ground clamping on each bus conductor. Use Value: Sub-1 ns response prevents data corruption during fast transients; UL 497B certification ensures compliance with industrial isolation standards. |
| Medical Equipment AC/DC Adapter Output | Automotive Aftermarket Telematics Module Power Input |
Use Scenario: +12 V output of medical-grade AC/DC adapter powering patient-monitoring sensor modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, upstream of LDO regulators. Use Value: 5 µA leakage preserves low-power sleep mode integrity; 1500 W rating handles capacitor discharge transients from faulty downstream loads. |
Use Scenario: 12 V vehicle battery input to GPS/cellular telematics module subjected to ISO 7637-2 pulse 1 and pulse 3a/b. IC Role / Device Role / Timing Role: First-stage transient suppressor on main power entry, before DC/DC converter and fuse. Use Value: 11.1 V VRWM allows safe operation across cold-crank (6.5 V) to load-dump (18 V) conditions; axial package enables through-hole mounting for mechanical robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Surface-mount SMB package; 12 V VRWM; 200 W peak power; lower IPP (10.1 A) | Designed for PCB space-constrained designs; insufficient for 1500 W IEC 61000-4-5 Level 4 surges | Select only for low-energy ESD-only protection where board area limits axial components. |
| 1.5KE12A | Same manufacturer, identical electrical specs (VRWM = 10.2 V, VC = 16.7 V @ 90 A), but obsolete per ON Semi preferred device list | No functional difference; not recommended for new designs due to obsolescence status and reduced supply chain support | Prefer 1N6274A for active design-in; 1.5KE12A may be available as legacy stock only. |
Compared with SMBJ12A, the 1N6274A delivers 7.5× higher surge energy handling and axial mechanical stability; compared with 1.5KE12A, it offers updated manufacturing traceability, Pb-free compliance assurance, and full lifecycle support - making it the optimal choice for new industrial and medical designs requiring long-term component availability.
Availability
1N6274A is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication systems, medical equipment adapters, and automotive telematics modules requiring stable component supply across multi-year production cycles.
Supply support for 1N6274A 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 1N6274A belongs to the Mosorb 1500 W TVS family, engineered specifically for high-reliability, high-surge industrial and telecom infrastructure protection - emphasizing UL 497B certification, low clamping ratio, and robust axial packaging for harsh environments.
FAQ
What is the clamping voltage of the 1N6274A under maximum surge conditions?
The 1N6274A clamps to 18.2 V at its rated peak pulse current of 82 A (1 ms, 10/1000 µs waveform). This value is guaranteed per ON Semiconductor's datasheet and represents the maximum voltage imposed on the protected circuit during a full 1500 W transient event - critical for verifying margin against downstream IC absolute maximum ratings.
Is the 1N6274A suitable for bidirectional signal line protection?
No, the 1N6274A is unidirectional and intended for DC rail or single-polarity line protection. For bidirectional applications like USB or RS-232, use the complementary 1N6274CA (if available) or select a purpose-built bidirectional TVS such as SMAJ12CA. Using 1N6274A on AC-coupled or differential lines risks reverse breakdown failure.
Does the 1N6274A meet RoHS and REACH requirements?
Yes, the 1N6274A features a Pb-free external lead finish and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its Surmetic plastic package contains no SVHC substances above threshold levels, and material declarations are available via onsemi's product environmental compliance portal.
How does the 1N6274A compare to standard Zener diodes for overvoltage protection?
Unlike general-purpose Zener diodes, the 1N6274A is optimized for transient suppression: it delivers 1500 W peak power (vs. typically <5 W for Zeners), sub-1 ns response (vs. µs range), and guaranteed clamping performance under surge conditions. Standard Zeners lack surge-rated construction, thermal mass, and standardized test waveforms - making 1N6274A the correct choice for IEC-compliant protection.
What is the maximum allowable lead temperature during soldering of the 1N6274A?
The maximum lead temperature for soldering the 1N6274A is 230°C, applied for no longer than 10 seconds at a distance of 1/16 inch (1.6 mm) from the plastic case body. Exceeding this limit risks internal bond wire damage or delamination, compromising surge reliability - always verify profile using thermocouple measurement per IPC-J-STD-020.
1N6274A 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):
- 11.1V
- Voltage - Breakdown (Min):
- 12.4V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- 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
1N6274A FAQ
1.How can I place an order for 1N6274A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6274A 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 1N6274A reliable?
The price and inventory of 1N6274A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6274A is usually 5 days.
3.What payment methods are accepted for 1N6274A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6274A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6274A?
1N6274A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6274A 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 1N6274A?
For technical support, including 1N6274A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6274A requirements.
6.How does Aetrix verify that 1N6274A is sourced from the original manufacturer or authorized distributors?
All 1N6274A 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 1N6274A meets industry standards.
7.What is the process for return or replacement of 1N6274A?
All 1N6274A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6274A, 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 1N6274A part is unused and in its original packaging.
Return procedure for 1N6274A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6274A 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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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