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Vishay General Semiconductor - Diodes Division 1N6277A-E3/54
- Part No.:
- 1N6277A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6277A-E3/54.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,562
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Product details
Overview
1N6277A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 17.1 V to 18.9 V breakdown voltage (VBR), 15.3 V standoff voltage (VWM), 25.2 V clamping voltage at 59.5 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the 1N6277A-E3/54 datasheet, 1N6277A-E3/54 pinout, 1N6277A-E3/54 application, or 1N6277A-E3/54 equivalent, this part delivers verified clamping performance for 12 V system-level surge immunity per IEC 61000-4-5, with RoHS-compliant matte tin-plated leads and JEDEC-standard 1.5KE package compatibility.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns), enabling effective suppression of fast-rising transients such as ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5). Its low incremental surge resistance ensures minimal voltage overshoot during high-current clamping events.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports 6.5 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature, and exhibits a temperature coefficient of VBR of +0.089 %/°C - confirming stable breakdown behavior across wide thermal operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - defines precise voltage threshold at which clamping initiates under 1 mA test current |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage seen by protected circuit during full 1500 W transient event |
| PPPM | 1500 W - peak pulse power handling capability with standardized 10/1000 µs waveform |
| IPPM | 59.5 A - maximum non-repetitive peak pulse current supported without degradation |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial control environments |
| Package | JEDEC 1.5KE - axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating |
Pinout & Package
Package: JEDEC Case Style 1.5KE - axial-leaded, molded epoxy body with cathode band marking; overall dimensions: 1.0" × 0.210" (25.4 mm × 5.3 mm); lead diameter: 0.042" (1.07 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during positive surge events when used in reverse-biased configuration |
| Cathode | Clamping reference terminal | Marked with color band; connected to higher-potential rail (e.g., VCC or signal line); establishes reverse-bias operation for overvoltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable breakdown characteristics and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports Level 4 IEC 61000-4-5 surge immunity (4 kV line-to-earth, 2 kV line-to-line) in 12 V systems |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience damaging overvoltage - critical for protecting CAN, LIN, and RS-485 interfaces |
| RoHS-compliant matte tin plating | Ensures solderability per J-STD-002 and JESD 22-B102; meets JESD 201 Class 1A whisker resistance |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for automotive and industrial safety certifications |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp transients above 15.3 V while remaining inert during normal operation. Use Value: Limits voltage excursion to ≤25.2 V during 1500 W surge, preventing damage to LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: Analog output lines (e.g., 4–20 mA current loop) in factory automation sensors subject to cable coupling surges. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, reverse-biased across signal and shield to suppress common-mode transients. Use Value: Clamps induced surges within 1 ns, preserving signal integrity and avoiding ADC saturation or op-amp latch-up. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: -48 V DC power input in telecom base station equipment vulnerable to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection scheme, coordinated with GDT and series impedance. Use Value: Handles up to 59.5 A peak current while maintaining <25.2 V clamping - reduces stress on downstream MOVs and polymer PTCs. |
Use Scenario: VBUS line in USB 2.0 peripheral devices subjected to ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Standalone unidirectional TVS placed directly at USB connector, cathode tied to VBUS, anode to GND. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) without parametric shift, ensuring USB enumeration reliability after repeated discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA (SMB) package; 18 V VWM; 28.8 V VC @ 53.5 A; 600 W PPPM | Lower power rating and surface-mount format - suited for space-constrained PCBs but not direct replacement for through-hole 1N6277A-E3/54 | Select SMBJ18A only when board layout mandates SMT and system surge energy remains ≤600 W |
| 1.5KE18A | Same 1.5KE package, identical electrical specs (VBR, VWM, VC, PPPM); differs only in packaging suffix (E3/54 = tape-and-reel, standard commercial grade) | No functional or application difference - fully interchangeable in design and qualification | 1.5KE18A is a direct form-fit-function match; use when sourcing flexibility or alternate reel quantities is required |
Compared with SMBJ18A, 1N6277A-E3/54 provides 2.5× higher surge power handling and axial-leaded mechanical robustness for high-vibration environments; compared with 1.5KE18A, it shares identical performance but carries Vishay's E3/54 tape-and-reel logistics coding for automated assembly traceability.
Availability
1N6277A-E3/54 is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor nodes, telecom DC feeds, and consumer USB interface protection requiring stable component supply across extended production lifecycles.
Supply support for 1N6277A-E3/54 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 AEC-Q qualification.
The 1N6277A-E3/54 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh-environment applications including automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for 1N6277A-E3/54?
The 1N6277A-E3/54 has a specified breakdown voltage range of 17.1 V to 18.9 V at 1 mA test current, representing a ±5.5 % tolerance about the nominal 18 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable coordination with upstream fuses or downstream IC absolute maximum ratings in designs using the 1N6277A-E3/54.
Is 1N6277A-E3/54 suitable for bidirectional transient protection?
No, 1N6277A-E3/54 is a unidirectional TVS diode - its cathode band indicates polarity, and it conducts only when reverse-biased beyond VBR. For bidirectional protection, Vishay offers the 1N6277CA variant (or 1.5KE18CA), which lacks polarity marking and clamps symmetrically in both directions. Using 1N6277A-E3/54 in AC-coupled or floating signal paths will not provide full-cycle surge suppression.
What is the maximum clamping voltage of 1N6277A-E3/54 under surge conditions?
The 1N6277A-E3/54 clamps to a maximum of 25.2 V when subjected to its rated 59.5 A peak pulse current (10/1000 µs waveform). This value is measured at the device terminals and represents the worst-case voltage imposed on the protected circuit during a full 1500 W transient - critical for verifying margin against IC overvoltage limits in systems where the 1N6277A-E3/54 is deployed.
Does 1N6277A-E3/54 meet AEC-Q101 qualification?
No, 1N6277A-E3/54 is the commercial-grade version (E3 suffix). AEC-Q101 qualified variants carry the HE3 suffix (e.g., 1.5KE18AHE3_B). While the 1N6277A-E3/54 shares identical electrical characteristics and construction, it has not undergone the accelerated stress testing required for automotive qualification - designers requiring AEC-Q101 must specify the HE3-part number instead of 1N6277A-E3/54.
What is the thermal resistance of 1N6277A-E3/54 from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of 1N6277A-E3/54 is 75 °C/W under standard mounting conditions (lead length 9.5 mm). This value governs steady-state temperature rise during continuous power dissipation and must be applied alongside its 6.5 W power rating at TL = 75 °C to ensure safe operation - especially important when the 1N6277A-E3/54 is used in thermally constrained enclosures or high-ambient-temperature environments.
1N6277A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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-E3/54 FAQ
1.How can I place an order for 1N6277A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6277A-E3/54 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-E3/54 reliable?
The price and inventory of 1N6277A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6277A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1N6277A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6277A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6277A-E3/54?
1N6277A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6277A-E3/54 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-E3/54?
For technical support, including 1N6277A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6277A-E3/54 requirements.
6.How does Aetrix verify that 1N6277A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6277A-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1N6277A-E3/54?
All 1N6277A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6277A-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1N6277A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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