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Vishay General Semiconductor - Diodes Division 1N6277-E3/73
- Part No.:
- 1N6277-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6277-E3/73.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,926
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Product details
Overview
1N6277-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails 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 maximum standoff voltage (VWM), 1.0 µA max reverse leakage at VWM, 59.5 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps to 25.2 V at IPPM. It is used in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1N6277-E3/73 datasheet, 1N6277-E3/73 pinout, 1N6277-E3/73 application, or 1N6277-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional capability context, thermal derating behavior, and direct alternatives with documented clamping and standoff differences.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering fast sub-nanosecond response to transient surges. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 100 A surge, per JESD22-B102 solderability compliance.
The 1N6277-E3/73 is rated for 1500 W peak pulse power (10/1000 µs), 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and operates across -55 °C to +175 °C junction temperature range. Thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 17.1 V / 18.9 V at 1.0 mA - defines minimum voltage at which avalanche conduction begins reliably |
| VWM | 15.3 V - maximum continuous working voltage before significant leakage occurs |
| IPPM | 59.5 A (10/1000 µs) - peak surge current it safely clamps without failure |
| VC at IPPM | 25.2 V - clamped voltage seen by protected circuit during full-rated surge |
| PPPM | 1500 W - transient energy handling capacity critical for lightning/inductive spike immunity |
| TJ max | +175 °C - enables operation in under-hood automotive or high-temperature industrial enclosures |
| RθJA | 75 °C/W - determines required PCB copper area or heatsinking for sustained power dissipation |
Pinout & Package
Package: JEDEC case style 1.5KE - molded epoxy body with matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated, 0.375" lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side of protected line; reverse-biased during clamping |
| Cathode (banded end) | Current exit point in forward bias; avalanche node in reverse | Connected to higher-potential side; conducts transient current to ground when VWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity in properly designed front-end circuits |
| Sub-nanosecond response time | Clamps transients before sensitive downstream ICs experience overstress, preserving MOSFET gate oxide integrity |
| AEC-Q101 qualification available (HE3 variant) | Validates robustness for automotive powertrain and body electronics applications requiring zero-failure field performance |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for 3.3 V or 5 V logic interfaces |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Primary shunt clamping device placed between power rail and chassis ground, absorbing >100 J energy pulses. Use Value: Limits rail voltage to ≤25.2 V during 59.5 A surge, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed in series with sensor output trace, referenced to system ground. Use Value: Clamps induced EFT bursts (IEC 61000-4-4) to 25.2 V while maintaining <1.0 µA leakage at 15.3 V nominal signal swing. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Secondary overvoltage protection on -48 V telecom rectifier outputs exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Standoff-clamp TVS on DC feed line upstream of bulk capacitance and DC-DC stage. Use Value: Withstands 1500 W surges without degradation, ensuring uptime in central office equipment operating at -40 °C to +85 °C ambient. | Use Scenario: Overvoltage guard on VBUS line of USB 2.0 host ports susceptible to hot-plug contact bounce and adapter faults. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, sized for 15.3 V VWM to avoid interfering with 5 V ±5 % USB spec. Use Value: Activates within 1 ns to limit fault voltage to 25.2 V, protecting USB controller PHY and port power switch from latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Lower PPPM (600 W), same VBR range (17.1–18.9 V), SMC package (smaller footprint) | Not suitable for 1500 W IEC 61000-4-5 Level 4; limited to Level 3 or board-level localized transients | Select SMBJ18A only when space-constrained layouts preclude 1.5KE and surge requirements are ≤600 W. |
| 1.5KE18A | Identical electrical specs and 1.5KE package; differs only in packaging format (E3/73 = 73 mm tape/reel, base 1.5KE18A = bulk or different reel) | No functional or application difference; identical placement, soldering, and protection behavior | 1.5KE18A is a direct form-fit-function match - use when E3/73 tape configuration is unavailable or cost-sensitive. |
Compared with SMBJ18A, the 1N6277-E3/73 provides 2.5× higher surge power handling and proven robustness in high-energy automotive and telecom environments; compared with 1.5KE18A, it offers identical protection performance with optimized logistics for automated SMT assembly via 73 mm tape.
Availability
1N6277-E3/73 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, telecom DC feeds, and consumer USB port protection requiring stable component supply across multi-year production cycles.
Supply support for 1N6277-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, rectifiers, and protection devices with emphasis on reliability, power handling, and AEC-Q qualification.
The 1N6277-E3/73 belongs to the TRANSZORB® 1.5KE family - engineered specifically for high-energy transient suppression in harsh environments where failure is not an option, including automotive, industrial, and infrastructure applications.
FAQ
What is the breakdown voltage tolerance of the 1N6277-E3/73?
The 1N6277-E3/73 has a specified breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1.0 mA test current, representing ±5.5 % tolerance about the nominal 18 V rating. This tight distribution ensures consistent clamping onset across production lots and supports reliable design margining in safety-critical protection circuits.
Is the 1N6277-E3/73 RoHS compliant and halogen-free?
Yes, the 1N6277-E3/73 carries the E3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per IEC 61249-2-21. The molding compound meets UL 94 V-0 flammability rating, and matte tin plating satisfies J-STD-002 solderability requirements.
Does the 1N6277-E3/73 support AEC-Q101 qualification?
The base 1N6277-E3/73 is commercial-grade. However, the AEC-Q101 qualified version is available as 1N6277AHE3_B (or 1.5KE18AHE3_B), which undergoes extended stress testing including HTOL, TC, and UHAST per AEC-Q101 Rev D. That variant is required for automotive powertrain and ADAS applications.
What is the maximum clamping voltage of the 1N6277-E3/73 at its rated peak pulse current?
The 1N6277-E3/73 clamps to a maximum of 25.2 V at its rated peak pulse current (IPPM) of 59.5 A under the standard 10/1000 µs waveform. This value is guaranteed per datasheet Table 1 and defines the upper voltage bound imposed on protected circuitry during worst-case surge events.
Can the 1N6277-E3/73 be used in bidirectional configurations?
No - the 1N6277-E3/73 is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, the equivalent part is 1N6277CA (or 1.5KE18CA), which provides symmetrical clamping in both polarities and no polarity marking.
1N6277-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 56.6A
- 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
1N6277-E3/73 FAQ
1.How can I place an order for 1N6277-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6277-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 1N6277-E3/73 reliable?
The price and inventory of 1N6277-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 1N6277-E3/73 is usually 5 days.
3.What payment methods are accepted for 1N6277-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6277-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6277-E3/73?
1N6277-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6277-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 1N6277-E3/73?
For technical support, including 1N6277-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6277-E3/73 requirements.
6.How does Aetrix verify that 1N6277-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6277-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 1N6277-E3/73 meets industry standards.
7.What is the process for return or replacement of 1N6277-E3/73?
All 1N6277-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6277-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 1N6277-E3/73 part is unused and in its original packaging.
Return procedure for 1N6277-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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