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Vishay General Semiconductor - Diodes Division 1N6277A-E3/73
- Part No.:
- 1N6277A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6277A-E3/73.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,708
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Product details
Overview
1N6277A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 17.1 V to 18.9 V breakdown voltage (VBR) at 1.0 mA test current, 15.3 V standoff voltage (VWM), 25.2 V clamping voltage (VC) at 59.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1N6277A-E3/73 datasheet, 1N6277A-E3/73 pinout, 1N6277A-E3/73 application, or 1N6277A-E3/73 equivalent, this part delivers verified unidirectional clamping performance, RoHS-compliant matte tin-plated leads, JEDEC 1.5KE case compatibility, and thermal stability up to +175 °C junction temperature - critical for automotive, industrial power supply, and telecom surge protection design validation.
Technical Context
The 1N6277A-E3/73 operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V maximum forward voltage at 100 A surge, per ANSI/IEEE C62.35 standards.
It is rated for 200 A non-repetitive forward surge current (IFSM) under 8.3 ms half-sine wave, derated above 25 °C ambient per Fig. 2, and supports stable operation across -55 °C to +175 °C junction temperature range. Thermal resistance is 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, supporting high-energy surge immunity |
| IFSM | 200 A - single-cycle surge current capability, enabling protection of power rails against inductive kickback |
| TJ max. | +175 °C - extended junction temperature rating allows use in under-hood automotive and high-ambient industrial environments |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports effective heat dissipation through PCB copper |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated terminals. Dimensions: 0.375" (9.5 mm) lead length, 0.210"–0.285" body diameter, 0.038"–0.042" lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; conducts during forward surge events |
| Cathode (banded end) | Avalanche clamping terminal | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 Level 4 surge immunity without external derating in standard layouts |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience damaging overvoltage - critical for microcontroller I/O protection |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes let-through voltage, reducing stress margin requirements for downstream MOSFET gate drivers and logic inputs |
| JEDEC 1.5KE mechanical standardization | Enables drop-in replacement across Vishay's 1.5KE family and compatibility with existing automated placement tooling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping spikes within 1 ns to limit voltage to ≤25.2 V. Use Value: Prevents latch-up or permanent damage to automotive-grade MCUs and CAN transceivers during harsh electrical environments. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting fast transients before reaching op-amp input stages. Use Value: Maintains signal integrity and avoids false readings or ADC saturation caused by ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom Line Surge Suppression | AC-DC Adapter Input Protection |
Use Scenario: Safeguarding Ethernet PHY front-end circuits against induced lightning surges on outdoor cabling per ITU-T K.20. IC Role / Device Role / Timing Role: Bidirectional-capable variant group member (though 1N6277A-E3/73 is unidirectional, used in DC-biased line configurations). Use Value: Enables compliance with GR-1089-CORE surge immunity requirements without adding series impedance or signal distortion. |
Use Scenario: Clamping differential-mode surges on primary-side rectifier outputs in offline SMPS designs. IC Role / Device Role / Timing Role: Placed across bulk capacitor input, absorbing 1500 W transients from AC line switching or lightning coupling. Use Value: Eliminates need for MOV-based solutions with higher clamping voltage and wear-out mechanisms, improving long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1.5KE18A-E3/54 | Same electrical specs and 1.5KE package; differs only in tape-and-reel packaging (1400 pcs/reel vs. 750 pcs/reel for -E3/73) | No functional difference; identical clamping behavior and thermal performance | Select 1.5KE18A-E3/54 for higher-volume SMT assembly requiring larger reel quantities |
| SMBJ18A-E3/52 | Lower 600 W PPPM, SMB package (smaller footprint), 18.9 V VBR, 29.2 V VC at 20.5 A - higher clamping voltage, lower surge capacity | Better suited for space-constrained PCBs where 1500 W rating is not required | Choose SMBJ18A-E3/52 only when board area is critical and surge energy remains below 600 W; not a direct replacement for 1N6277A-E3/73 in high-energy applications |
Compared with 1N6277A-E3/73, 1.5KE18A-E3/54 offers identical protection performance with optimized logistics for high-volume production, while SMBJ18A-E3/52 trades surge capacity and clamping tightness for compactness - making it suitable only for lower-energy, space-sensitive designs.
Availability
1N6277A-E3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N6277A-E3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-power handling.
The 1N6277A-E3/73 belongs to Vishay's TRANSZORB® TVS diode family, engineered specifically for high-energy transient suppression in automotive, industrial, and communications systems where failure resilience is mandatory.
FAQ
What is the breakdown voltage tolerance for 1N6277A-E3/73?
The 1N6277A-E3/73 has a specified breakdown voltage range of 17.1 V to 18.9 V at 1.0 mA test current, representing a ±5.5% tolerance around the nominal 18 V rating. This tight VBR window ensures consistent clamping onset across production lots and enables predictable system-level overvoltage margining in designs using the 1N6277A-E3/73.
Is 1N6277A-E3/73 RoHS compliant and lead-free?
Yes, the 1N6277A-E3/73 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and JESD 201 Class 1A whisker testing. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the molded epoxy body complies with UL 94 V-0 flammability rating - all confirmed in Vishay document 88301 revision 09-Aug-2022.
Can 1N6277A-E3/73 be used in bidirectional protection circuits?
No, the 1N6277A-E3/73 is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional applications, Vishay specifies variants with "CA" suffix (e.g., 1.5KE18CA). Using the unidirectional 1N6277A-E3/73 in AC-coupled or symmetrical surge paths would result in forward conduction during negative half-cycles and potential failure.
What is the maximum clamping voltage of 1N6277A-E3/73 under surge conditions?
The 1N6277A-E3/73 clamps to a maximum of 25.2 V when subjected to its rated 59.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events - a key parameter for validating safe operating margins of downstream 3.3 V or 5 V ICs.
Does 1N6277A-E3/73 require heatsinking in typical applications?
The 1N6277A-E3/73 does not require external heatsinking for transient suppression duty due to its short-duration pulse nature (≤1 ms), but PCB layout must provide adequate copper area for thermal conduction. Its RθJL of 15.4 °C/W means that with ≥1 in² of 2-oz copper connected to both leads, junction temperature rise remains within limits even during repetitive surges - a design consideration explicitly validated for the 1N6277A-E3/73 in Vishay's thermal curves (Fig. 5).
1N6277A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6277A-E3/73 FAQ
1.How can I place an order for 1N6277A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6277A-E3/73 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 1N6277A-E3/73 reliable?
The price and inventory of 1N6277A-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6277A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1N6277A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6277A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6277A-E3/73?
1N6277A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6277A-E3/73 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 1N6277A-E3/73?
For technical support, including 1N6277A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6277A-E3/73 requirements.
6.How does Aetrix verify that 1N6277A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6277A-E3/73 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 1N6277A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1N6277A-E3/73?
All 1N6277A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6277A-E3/73, 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 1N6277A-E3/73 part is unused and in its original packaging.
Return procedure for 1N6277A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6277A-E3/73 Tags
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