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Vishay General Semiconductor - Diodes Division 1N6303A-E3/73
- Part No.:
- 1N6303A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6303A-E3/73.pdf
- Description:
- TVS DIODE 171VWM 274VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,407
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Product details
Overview
1N6303A-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 190 V to 210 V breakdown voltage (VBR), 171 V maximum standoff voltage (VWM), 1500 W peak pulse power (10/1000 µs), 5.5 A peak pulse current (IPPM), and clamps transients to ≤274 V at rated surge. It is widely deployed in automotive power supply rails, industrial motor drive I/O protection, and telecom DC feed circuits.
For engineers reviewing the 1N6303A-E3/73 datasheet, 1N6303A-E3/73 pinout, 1N6303A-E3/73 application, or 1N6303A-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, thermal derating behavior, clamping performance curves, and direct alternatives for ESD/lightning surge protection design.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse rating is defined under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and it operates across –55 °C to +175 °C junction temperature range.
The device exhibits a 0.108 %/°C temperature coefficient of VBR, ensuring stable breakdown voltage over temperature. Its 75 °C/W junction-to-ambient thermal resistance and 15.4 °C/W junction-to-lead resistance support reliable power dissipation up to 6.5 W on infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 190 V / 210 V - Ensures reliable conduction onset above system operating voltage while avoiding false triggering |
| VWM | 171 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA |
| IPPM | 5.5 A - Peak surge current it safely clamps during 10/1000 µs transient without failure |
| VC @ IPPM | ≤274 V - Clamped voltage seen by protected circuit during full-rated surge event |
| PPPM | 1500 W - Peak transient power handling capability per industry-standard waveform |
| TJ max. | +175 °C - Enables operation in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - Thermal resistance used to calculate safe ambient temperature limits for PCB layout |
Pinout & Package
1N6303A-E3/73 is housed in the standard axial-lead JEDEC Case Style 1.5KE package (DO-201AD), with cathode indicated by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side of protected line; enables bidirectional surge suppression only when paired with complementary device |
| Cathode | Current exit point in forward bias; marked end | Connected to higher-potential side (e.g., VCC rail); defines polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable long-term reliability and low leakage (<1 µA at VWM) across temperature and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Provides robust immunity against lightning-induced surges (IEC 61000-4-5 Level 4) and inductive switching spikes |
| Clamping voltage ≤274 V at 5.5 A | Ensures downstream ICs (e.g., microcontrollers, gate drivers) remain below absolute maximum ratings during surge events |
| AEC-Q101 qualified option available | Supports automotive-grade qualification path (via HE3 suffix variants) for engine control, body electronics, and ADAS modules |
| UL 94 V-0 molded epoxy case | Meets flammability safety requirements for enclosed industrial and telecom equipment enclosures |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp positive-going surges above 171 V. Use Value: Limits transient voltage to ≤274 V, preventing damage to 36 V-rated LDOs and CAN transceivers in vehicle networks. |
Use Scenario: Shielding PLC analog input channels from inductive kickback during solenoid valve switching. IC Role / Device Role / Timing Role: TVS connected across input terminals to absorb energy from 100–200 V, 100 µs–1 ms transients. Use Value: Prevents ADC saturation and op-amp latch-up by clamping within 1 ns, preserving measurement integrity. |
| Telecom DC Feed Protection | Consumer Appliance Power Supply Input |
Use Scenario: Safeguarding PoE-powered remote units against induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Unidirectional TVS installed at DC input stage to suppress common-mode transients coupled from Ethernet cables. Use Value: Withstands repetitive 1500 W pulses without degradation, maintaining compliance with GR-1089-CORE Section 4.5.2.2. |
Use Scenario: Overvoltage protection on AC/DC adapter primary-side rectifier output in white goods. IC Role / Device Role / Timing Role: TVS placed across bulk capacitor to limit voltage overshoot during mains surge events. Use Value: Fast <1 ns response prevents MOSFET avalanche failure and reduces need for oversized snubbers. |
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 (3.5 mm × 4.6 mm), VBR = 222–245 V, VC = 324 V @ 1.85 A | Not suitable for 1500 W surge environments; limited to board space-constrained consumer designs | Select when footprint reduction outweighs peak power requirement and surge exposure is moderate (e.g., IEC 61000-4-4 Level 3). |
| 1.5KE200A | Same electrical specs and JEDEC 1.5KE package; identical VBR, VWM, VC, PPPM; differs only in packaging (tape-and-reel vs. bulk/ammopack) | No functional difference; interchangeable in circuit design and thermal management | Choose 1.5KE200A for automated SMT assembly where E3/73's radial lead form factor is incompatible with pick-and-place. |
Compared with SMBJ200A, 1N6303A-E3/73 delivers 2.5× higher surge power handling and superior thermal dissipation via axial leads; compared with 1.5KE200A, it shares identical protection characteristics but offers RoHS-compliant matte tin plating and JESD 201 Class 1A whisker resistance for high-reliability commercial use.
Availability
1N6303A-E3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial motor drive I/O safeguarding, and telecom DC feed circuits requiring stable component supply across extended production lifecycles.
Supply support for 1N6303A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1N6303A-E3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What is the breakdown voltage tolerance of the 1N6303A-E3/73?
The 1N6303A-E3/73 has a specified breakdown voltage (VBR) range of 190 V minimum to 210 V maximum at 1.0 mA test current. This ±5.3% tolerance ensures consistent clamping behavior across production lots while allowing margin for system-level voltage drift and temperature variation.
Is the 1N6303A-E3/73 suitable for bidirectional transient suppression?
No - the 1N6303A-E3/73 is a unidirectional TVS diode, identified by its cathode band marking. For bidirectional protection, Vishay offers the 1N6303CA variant (or 1.5KE200CA), which provides symmetrical clamping in both polarities and lacks polarity marking.
What is the maximum clamping voltage of the 1N6303A-E3/73 at its rated peak pulse current?
The 1N6303A-E3/73 clamps to a maximum of 274 V when subjected to its rated 5.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed per Vishay Document Number 88301 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does the 1N6303A-E3/73 meet automotive qualification standards?
The base 1N6303A-E3/73 is commercial-grade. However, Vishay offers the AEC-Q101 qualified variant as 1N6303AHE3_B (or 1.5KE200AHE3_B), which undergoes stress testing per automotive reliability standards and is intended for engine control, body electronics, and infotainment systems.
How does the thermal resistance of the 1N6303A-E3/73 affect PCB layout?
With RθJA = 75 °C/W and RθJL = 15.4 °C/W, the 1N6303A-E3/73 relies heavily on lead conduction for heat removal. To maintain TJ ≤ 175 °C, PCB traces connected to its leads must provide low-thermal-resistance paths - typically ≥25 mm² copper pour per lead - especially in high-duty-cycle surge environments.
1N6303A-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):
- 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-E3/73 FAQ
1.How can I place an order for 1N6303A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6303A-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 1N6303A-E3/73 reliable?
The price and inventory of 1N6303A-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 1N6303A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1N6303A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6303A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6303A-E3/73?
1N6303A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6303A-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 1N6303A-E3/73?
For technical support, including 1N6303A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6303A-E3/73 requirements.
6.How does Aetrix verify that 1N6303A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6303A-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 1N6303A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1N6303A-E3/73?
All 1N6303A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6303A-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 1N6303A-E3/73 part is unused and in its original packaging.
Return procedure for 1N6303A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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