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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division 1N6287A-E3/51

Name: 1N6287A-E3/51
Brand: Vishay General Semiconductor - Diodes Division
SKU: 1N6287A-E3/51
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N6287A-E3/51

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-201AA, DO-27, Axial

Datasheet:: 1N6287A-E3/51.pdf

Description:: TVS DIODE 40.2VWM 64.8VC 1.5KE

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Product details

Overview

1N6287A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 47 V breakdown voltage (V_BR = 44.7–49.4 V at 1.0 mA), 40.2 V maximum working voltage (V_WM), 64.8 V clamping voltage (V_C) at 23.1 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.

For engineers reviewing the 1N6287A-E3/51 datasheet, 1N6287A-E3/51 pinout, 1N6287A-E3/51 application, or 1N6287A-E3/51 equivalent, this device delivers verified transient suppression performance with glass-passivated junction reliability, RoHS-compliant matte tin leads, and JEDEC-standard 1.5KE package compatibility - critical for ESD and lightning surge design validation.

Technical Context

This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its 44.7–49.4 V breakdown threshold, it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its 64.8 V clamping voltage at 23.1 A ensures safe voltage limiting during 10/1000 µs transients.

Thermal design is supported by 15.4 °C/W junction-to-lead thermal resistance and 75 °C/W junction-to-ambient rating; it sustains 6.5 W steady-state power dissipation at T_L = 75 °C and handles 200 A non-repetitive forward surge (8.3 ms half-sine). The device is rated for -55 °C to +175 °C operating junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage V_BR	44.7–49.4 V at 1.0 mA - defines precise avalanche initiation point for reliable overvoltage triggering
Stand-off Voltage V_WM	40.2 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA, ensuring no false conduction in normal operation
Clamping Voltage V_C	64.8 V at 23.1 A (10/1000 µs) - limits protected node voltage during surge, enabling safe margin below IC absolute max ratings
Peak Pulse Power PPPM	1500 W - supports high-energy transients such as IEC 61000-4-5 Level 4 surges without failure
Peak Pulse Current I_PPM	23.1 A - quantifies maximum surge current the device can safely clamp and divert
Junction Temperature Range	-55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments with wide thermal cycling
Package	DO-201AD (Case Style 1.5KE) - industry-standard axial leaded package with 0.375" lead length, UL 94 V-0 molded epoxy body

Pinout & Package

Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode identified by color band on body end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse surge return path	Connected to system ground or low-impedance return when used in unidirectional clamping configuration
Cathode	Avalanche voltage reference / Surge current sink	Connected to protected line (e.g., 48 V rail or CAN_H); color band denotes cathode end per JEDEC standard

Key Features

Feature	Design Value
Glass passivated chip junction	Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress
1500 W peak pulse power (10/1000 µs)	Provides robust protection against high-energy transients including load dump and inductive switching events
Sub-nanosecond response time	Clamps within <1 ns - faster than MOVs or GDTs - preserving signal integrity in high-speed interfaces
Low incremental surge resistance	Minimizes V_C – V_BR differential, reducing let-through energy during clamping
RoHS-compliant, commercial-grade E3 suffix	Meets JESD 201 Class 1A whisker test and JESD 22-B106 solder dip (275 °C, 10 s)

Applications

Automotive Power Rail Protection	Industrial Sensor Interface Protection
Use Scenario: Protecting 48 V battery-fed ECUs from load dump transients up to ISO 7637-2 Pulse 5a (110 V, 400 ms). IC Role / Device Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp overvoltage before reaching PMIC or MCU inputs. Use Value: 64.8 V clamping ensures downstream 75 V-rated components remain within safe operating area during 100 V+ surges.	Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature transducers) from ESD and cable discharge events in factory automation. IC Role / Device Role: Low-capacitance TVS mounted at connector entry point to suppress ±8 kV contact ESD (IEC 61000-4-2) without distorting mV-level signals. Use Value: 1.0 µA leakage at 40.2 V preserves sensor offset accuracy while enabling fast sub-ns clamping of transients.
Telecom Line Card Surge Protection	DC Motor Drive Control Signal Protection
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in outdoor telecom equipment exposed to induced lightning surges (IEC 61000-4-5, 2 kV/12 Ω) IC Role / Device Role: Primary-level TVS on 3.3 V/5 V bias supplies feeding PoE controllers and magnetics interfaces. Use Value: 1500 W rating allows single-device handling of full 2 kV surge energy without cascading failure or thermal runaway.	Use Scenario: Protecting gate drive signals (e.g., PWM to MOSFET half-bridge) from inductive kickback during motor commutation in HVAC or pump controllers. IC Role / Device Role: Unidirectional TVS across gate-source or gate-drain nodes to prevent V_GS overstress beyond ±20 V absolute maximum. Use Value: 40.2 V V_WM permits use with 36 V logic supplies while clamping spikes to ≤64.8 V - well below typical 100 V MOSFET gate oxide limits.

Automotive Power Rail Protection

Industrial Sensor Interface Protection

Use Scenario: Protecting 48 V battery-fed ECUs from load dump transients up to ISO 7637-2 Pulse 5a (110 V, 400 ms).

IC Role / Device Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp overvoltage before reaching PMIC or MCU inputs.

Use Value: 64.8 V clamping ensures downstream 75 V-rated components remain within safe operating area during 100 V+ surges.

Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature transducers) from ESD and cable discharge events in factory automation.

IC Role / Device Role: Low-capacitance TVS mounted at connector entry point to suppress ±8 kV contact ESD (IEC 61000-4-2) without distorting mV-level signals.

Use Value: 1.0 µA leakage at 40.2 V preserves sensor offset accuracy while enabling fast sub-ns clamping of transients.

Telecom Line Card Surge Protection

DC Motor Drive Control Signal Protection

Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in outdoor telecom equipment exposed to induced lightning surges (IEC 61000-4-5, 2 kV/12 Ω)

IC Role / Device Role: Primary-level TVS on 3.3 V/5 V bias supplies feeding PoE controllers and magnetics interfaces.

Use Value: 1500 W rating allows single-device handling of full 2 kV surge energy without cascading failure or thermal runaway.

Use Scenario: Protecting gate drive signals (e.g., PWM to MOSFET half-bridge) from inductive kickback during motor commutation in HVAC or pump controllers.

IC Role / Device Role: Unidirectional TVS across gate-source or gate-drain nodes to prevent V_GS overstress beyond ±20 V absolute maximum.

Use Value: 40.2 V V_WM permits use with 36 V logic supplies while clamping spikes to ≤64.8 V - well below typical 100 V MOSFET gate oxide limits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ48A	Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), 48 V nominal V_BR, 77.4 V V_C at 7.7 A	Better suited for space-constrained PCBs; lower surge capacity requires parallel staging for 1500 W needs	Select when board area is limited and surge energy is ≤600 W; verify thermal derating for sustained duty cycles
1.5KE47A	Same electrical specs and DO-201AD package; differs only in packaging suffix (E3/51 vs. bulk/reel coding) and RoHS compliance documentation	Functionally identical; used interchangeably where E3/51 tape-and-reel delivery is required	Choose 1.5KE47A for alternate sourcing or when E3/51-specific logistics are not mandatory

Compared with 1N6287A-E3/51, SMBJ48A trades surge capacity and thermal mass for compactness, while 1.5KE47A offers identical protection performance in alternative packaging formats - enabling supply chain flexibility without circuit redesign.

Availability

1N6287A-E3/51 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom line card surge suppression, and DC motor drive control signal safeguarding requiring stable component supply and traceable sourcing.

Supply support for 1N6287A-E3/51 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, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and AEC-Q qualification.

The 1N6287A-E3/51 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and infrastructure applications demanding proven surge resilience.

FAQ

What is the breakdown voltage range of the 1N6287A-E3/51?

The 1N6287A-E3/51 has a guaranteed breakdown voltage (V_BR) range of 44.7 V to 49.4 V at a test current of 1.0 mA, measured per JEDEC standard. This tight tolerance ensures consistent avalanche initiation across production lots and supports precise overvoltage threshold design in 48 V systems.

Is the 1N6287A-E3/51 suitable for automotive applications?

Yes, the 1N6287A-E3/51 is widely deployed in automotive electronics for load dump and ISO 7637-2 transient protection. While the E3/51 variant is commercial-grade, its -55 °C to +175 °C junction temperature range, 1500 W surge capability, and glass-passivated junction meet core requirements for under-hood and body-control module designs.

How does the clamping voltage of the 1N6287A-E3/51 compare to its breakdown voltage?

The 1N6287A-E3/51 clamps at 64.8 V when subjected to its rated 23.1 A peak pulse current (10/1000 µs waveform), resulting in a 15.4–20.1 V differential above its 44.7–49.4 V breakdown range. This incremental clamping voltage reflects low dynamic impedance, critical for minimizing let-through energy during surge events.

What package type does the 1N6287A-E3/51 use, and what are its key mechanical features?

The 1N6287A-E3/51 uses the DO-201AD package (Case Style 1.5KE), featuring axial matte tin-plated leads, UL 94 V-0 compliant epoxy molding, and 0.375" (9.5 mm) lead length. Its glass-passivated junction and robust case enable high-reliability mounting in wave-solder or hand-solder processes per JESD 22-B106.

Can the 1N6287A-E3/51 be used in bidirectional configurations?

No - the 1N6287A-E3/51 is a unidirectional TVS diode, indicated by the "A" suffix. Bidirectional variants use the "CA" suffix (e.g., 1.5KE47CA). Using 1N6287A-E3/51 in reverse-biased AC applications would result in forward conduction and potential failure; always confirm polarity marking (cathode band) during layout.

1N6287A-E3/51 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-201AA, DO-27, Axial

Series:: TransZorb®

Packaging:: Bulk

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 40.2V

Voltage - Breakdown (Min):: 44.7V

Voltage - Clamping (Max) @ Ipp:: 64.8V

Current - Peak Pulse (10/1000µs):: 23.1A

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

1N6287A-E3/51 FAQ

1.How can I place an order for 1N6287A-E3/51 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N6287A-E3/51 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 1N6287A-E3/51 reliable?

The price and inventory of 1N6287A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6287A-E3/51 is usually 5 days.

3.What payment methods are accepted for 1N6287A-E3/51?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6287A-E3/51 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N6287A-E3/51?

1N6287A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N6287A-E3/51 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 1N6287A-E3/51?

For technical support, including 1N6287A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6287A-E3/51 requirements.

6.How does Aetrix verify that 1N6287A-E3/51 is sourced from the original manufacturer or authorized distributors?

All 1N6287A-E3/51 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 1N6287A-E3/51 meets industry standards.

7.What is the process for return or replacement of 1N6287A-E3/51?

All 1N6287A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6287A-E3/51, 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 1N6287A-E3/51 part is unused and in its original packaging.

Return procedure for 1N6287A-E3/51:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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