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Vishay General Semiconductor - Diodes Division 1N6303A-E3/51
- Part No.:
- 1N6303A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6303A-E3/51.pdf
- Description:
- TVS DIODE 171VWM 274VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,412
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Product details
Overview
1N6303A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in power rails and signal lines. It features a 190 V to 210 V breakdown voltage (VBR), 171 V stand-off voltage (VWM), 274 V clamping voltage (VC) at 5.5 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in industrial power supplies.
For engineers reviewing the 1N6303A-E3/51 datasheet, 1N6303A-E3/51 pinout, 1N6303A-E3/51 application, or 1N6303A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal derating guidance, and direct alternatives with documented differences in breakdown tolerance and leakage performance.
Technical Context
This device implements a glass-passivated silicon p-n junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced placement on DC-biased lines, with a 3.5 V forward voltage at 100 A surge current - consistent with 1.5KE220A and lower variants per specification note (3).
The 1N6303A-E3/51 conforms to the 1.5KE family's standardized mechanical outline (Case Style 1.5KE), rated for 200 A non-repetitive forward surge (8.3 ms half-sine), and exhibits a +0.108 %/°C temperature coefficient of VBR, enabling predictable voltage shift across operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 190 V / 210 V at 1.0 mA test current - defines reliable conduction onset under transient stress |
| VWM | 171 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 274 V at 5.5 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 1500 W - peak pulse power handling capability without failure under standardized surge waveform |
| IFSM | 200 A - maximum non-repetitive forward surge current (8.3 ms half-sine), critical for inrush survivability |
| TJ range | -55 °C to +175 °C - extended thermal envelope supporting under-hood automotive and industrial ambient conditions |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance, informing heatsink requirements for sustained power dissipation |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), suitable for wave and reflow soldering (JESD 22-B106, 275 °C max, 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected line; cathode must face higher potential for unidirectional clamping |
| Cathode | Reverse-biased terminal (marked with color band) | Connected to higher-potential rail; initiates avalanche conduction when VAK ≥ VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges without derating in compact PCB layouts |
| Clamping ratio (VC/VBR) ≈ 1.37 | Indicates efficient voltage limiting - lower ratio reduces stress on downstream MOSFET gate oxides and logic inputs |
| 0.108 %/°C VBR tempco | Ensures predictable breakdown shift over temperature, simplifying margin analysis in wide-range environments |
| AEC-Q101 qualification option (HE3 suffix) | Available in automotive-grade variant with validated reliability for engine control and ADAS power domains |
Applications
| Industrial Motor Drives | Automotive Power Distribution Units |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O in 24 V/48 V DC motor control modules exposed to inductive kickback from brushed/BLDC motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side MOSFET source and ground, clamping transients within 1 ns to prevent latch-up or gate oxide rupture. Use Value: Limits transient overshoot to ≤274 V during 5.5 A surge, preserving 3.3 V/5 V logic integrity and extending MOSFET lifetime under repetitive switching. |
Use Scenario: Input rail protection in fuse box electronics managing battery-fed loads (e.g., HVAC actuators, lighting modules) subject to load dump and jump-start events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V/24 V supply input, positioned upstream of DC-DC converters and CAN transceivers. Use Value: Withstands 1500 W surges while maintaining 171 V stand-off, ensuring uninterrupted operation during ISO 7637-2 Pulse 5a (load dump) up to 60 V. |
| Telecom Power Rectification | Consumer Appliance Control Boards |
Use Scenario: Surge suppression on AC-DC adapter output rails feeding PoE-powered switches and base station RF front-end bias supplies. IC Role / Device Role / Timing Role: Secondary-side TVS on +48 V DC output, guarding rectifier diodes and PMICs against lightning-coupled transients entering via Ethernet cabling. Use Value: Clamps 10/1000 µs surges to 274 V before energy reaches sensitive DC-DC controllers, reducing need for additional filtering stages. |
Use Scenario: Protection of microcontroller reset lines and communication buses (I²C, UART) in washing machine main control boards subjected to relay coil transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on 3.3 V logic rail, connected anode-to-ground to suppress negative-going spikes from solenoid drivers. Use Value: Sub-1 ns response prevents false resets or data corruption during 200 A inductive turn-off events, meeting IEC 61000-4-4 EFT immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ200A | Lower PPPM (600 W), smaller SMB package (vs. 1.5KE), VBR = 222–245 V, VC = 324 V @ 1.85 A | Not suitable for 1500 W surge environments; preferred where board space is constrained and peak currents ≤2 A | Select SMBJ200A only if system-level testing confirms 600 W clamping meets IEC 61000-4-5 requirements; verify thermal relief for SMB footprint. |
| 1.5KE200A | Identical electrical specs and package; differs only in packaging format (E3/54 tape-and-reel vs. E3/51) and traceability marking | No functional difference; both meet same Vishay 1.5KE200A specification sheet (Doc #88301) | 1.5KE200A-E3/51 is functionally identical to 1N6303A-E3/51 - use interchangeably where bill-of-materials standardization is prioritized. |
Compared with 1N6303A-E3/51, SMBJ200A offers space savings but sacrifices 60% peak power handling and requires revalidation for high-energy transients, whereas 1.5KE200A-E3/51 provides full drop-in compatibility with identical clamping, thermal, and surge performance.
Availability
1N6303A-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution units, telecom power rectification, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.
Supply support for 1N6303A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series - including 1N6303A-E3/51 - was developed for high-energy transient suppression in harsh-environment power systems, targeting applications demanding >1000 W surge capability and extended temperature operation.
FAQ
What is the breakdown voltage tolerance for 1N6303A-E3/51?
The 1N6303A-E3/51 has a specified breakdown voltage range of 190 V to 210 V at 1.0 mA test current, corresponding to ±5.3% tolerance about the nominal 200 V rating. This tolerance is confirmed in the Electrical Characteristics table of Vishay document 88301 and applies under standard TA = 25 °C conditions.
Is 1N6303A-E3/51 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1N6303A-E3/51 explicitly denotes RoHS compliance and commercial-grade qualification per Vishay's ordering nomenclature. The device uses matte tin-plated leads and meets JESD 201 Class 1A whisker testing, with no lead content exceeding EU RoHS limits.
Can 1N6303A-E3/51 be used in bidirectional configurations?
No - 1N6303A-E3/51 is a unidirectional TVS diode, indicated by the "A" suffix and presence of a cathode band. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE200CA); using 1N6303A-E3/51 in AC or floating applications would result in forward conduction during negative half-cycles.
What is the maximum clamping voltage of 1N6303A-E3/51 under surge conditions?
The maximum clamping voltage (VC) of 1N6303A-E3/51 is 274 V at 5.5 A peak pulse current (IPPM) with a 10/1000 µs waveform, as specified in the Electrical Characteristics table. This value represents worst-case voltage seen by downstream circuitry during standardized surge testing.
Does 1N6303A-E3/51 meet AEC-Q101 qualification?
The base 1N6303A-E3/51 is commercial grade. An AEC-Q101 qualified version is available as 1N6303AHE3_B (or 1.5KE200AHE3_B), which shares identical electrical specs but undergoes additional stress testing per AEC-Q101 Rev D for automotive under-hood applications.
1N6303A-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):
- 171V
- Voltage - Breakdown (Min):
- 190V
- Voltage - Clamping (Max) @ Ipp:
- 274V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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
1N6303A-E3/51 FAQ
1.How can I place an order for 1N6303A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6303A-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 1N6303A-E3/51 reliable?
The price and inventory of 1N6303A-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 1N6303A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1N6303A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6303A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6303A-E3/51?
1N6303A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6303A-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 1N6303A-E3/51?
For technical support, including 1N6303A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6303A-E3/51 requirements.
6.How does Aetrix verify that 1N6303A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6303A-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 1N6303A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1N6303A-E3/51?
All 1N6303A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6303A-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 1N6303A-E3/51 part is unused and in its original packaging.
Return procedure for 1N6303A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6303A-E3/51 Tags
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