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Vishay General Semiconductor - Diodes Division 1N6303AHE3/51
- Part No.:
- 1N6303AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6303AHE3/51.pdf
- Description:
- TVS DIODE 171VWM 274VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,078
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Product details
Overview
1N6303AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 190 V to 210 V breakdown voltage (VBR), 171 V maximum stand-off voltage (VWM), 274 V clamping voltage at 5.5 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability - deployed in engine control units, infotainment power supplies, and industrial sensor interfaces.
For engineers reviewing the 1N6303AHE3/51 datasheet, 1N6303AHE3/51 pinout, 1N6303AHE3/51 application, or 1N6303AHE3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJL = 15.4 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and JEDEC 1.5KE package compatibility with high-surge industrial environments.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VWM (171 V), it avalanches into low-impedance conduction to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling sub-nanosecond response (<1 ns) to ESD and lightning-induced transients.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports continuous power dissipation of 6.5 W on infinite heatsink at TL = 75 °C, and maintains operation across –55 °C to +175 °C junction temperature range - critical for under-hood automotive and industrial power supply designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 190 V / 210 V - Ensures reliable avalanche initiation above 171 V operating rail without false triggering |
| VWM | 171 V - Maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 274 V at 5.5 A - Clamping voltage limits stress on protected MOSFETs or microcontrollers during surge |
| PPPM | 1500 W (10/1000 μs) - Handles high-energy transients common in automotive load-dump and inductive switching |
| IFSM | 200 A (8.3 ms half-sine) - Withstands repetitive motor-driver turn-off surges without degradation |
| TJ max. | +175 °C - Enables placement near hot components (e.g., power inductors, DC-DC converters) |
| RθJL | 15.4 °C/W - Supports thermal design with short lead paths to PCB copper for effective heat extraction |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-impedance reference plane to complete clamping loop |
| Cathode | Protected line connection | Connected to input rail (e.g., 12 V battery feed); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Stable VBR drift <0.1 %/°C and long-term leakage stability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surge immunity requirements |
| Sub-nanosecond response | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms matte tin plating meets stringent whisker mitigation for high-reliability solder joints |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Input |
|---|---|
Use Scenario: Protects microcontroller power rails from load-dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between battery feed and LDO input. Use Value: Limits clamped voltage to 274 V, preventing damage to 36 V-rated input capacitors and 5 V LDOs. |
Use Scenario: Shields 24 V DC input stage of programmable logic controller against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry, upstream of bulk capacitance. Use Value: Absorbs 1500 W surge energy without degradation, maintaining system uptime in factory automation. |
| Telecom Remote Radio Unit (RRU) | Medical Diagnostic Imaging Power Supply |
Use Scenario: Safeguards Ethernet PHY power pins against lightning-induced surges on outdoor fiber-to-the-tower links. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated 12 V bias rail feeding RF front-end amplifiers. Use Value: Sub-ns response prevents latch-up in sensitive analog RF ICs during fast-rising transients. |
Use Scenario: Guards auxiliary 48 V supply feeding X-ray detector ASICs against switching noise from high-current inverters. IC Role / Device Role / Timing Role: High-energy clamping element on medical-grade isolated DC-DC output. Use Value: AEC-Q101 qualification and 175 °C rating ensure compliance with IEC 60601-1 creepage/clearance and thermal safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ200A | DO-214AA package, lower PPPM (600 W), VC = 324 V @ 1.9 A | Compact surface-mount alternative for space-constrained PCBs; not AEC-Q101 qualified | Select SMBJ200A only if board area is limited and surge energy is ≤600 W; verify thermal pad layout for 6.5 W dissipation. |
| 1.5KE200A-E3/54 | Same 1.5KE package, identical electrical specs, but commercial-grade (non-AEC-Q101), E3 suffix only | Acceptable for non-automotive industrial use where automotive qualification is not mandated | Choose 1.5KE200A-E3/54 for cost-sensitive consumer or computing applications requiring same clamping performance without AEC-Q101 traceability. |
Compared with SMBJ200A and 1.5KE200A-E3/54, the 1N6303AHE3/51 uniquely delivers AEC-Q101 qualification, JESD 201 Class 2 whisker resistance, and guaranteed 1500 W surge handling in the axial 1.5KE form factor - making it the only option qualified for under-hood automotive deployment with full production traceability.
Availability
1N6303AHE3/51 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom remote radio units, and medical imaging power systems requiring stable component supply with full AEC-Q101 documentation and lot-level traceability.
Supply support for 1N6303AHE3/51 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1N6303AHE3/51 belongs to Vishay's TRANSZORB® TVS family - engineered specifically for robust, high-energy transient suppression in harsh environments where failure is not an option.
FAQ
What is the breakdown voltage tolerance for the 1N6303AHE3/51?
The 1N6303AHE3/51 has a specified breakdown voltage range of 190 V to 210 V at 1.0 mA test current, corresponding to a ±5 % tolerance around the nominal 200 V rating. This tight VBR distribution ensures consistent clamping behavior across production lots and supports reliable margining in 171 V nominal systems.
Is the 1N6303AHE3/51 suitable for automotive under-hood applications?
Yes, the 1N6303AHE3/51 is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C, making it suitable for under-hood automotive applications such as engine control modules and transmission control units. Its glass-passivated junction and JESD 201 Class 2 whisker-resistant plating further support long-term reliability in thermally aggressive environments.
How does the clamping voltage of the 1N6303AHE3/51 compare to its breakdown voltage?
The 1N6303AHE3/51 clamps at 274 V when subjected to its rated 5.5 A peak pulse current (10/1000 µs waveform), which is approximately 37 % above its minimum breakdown voltage of 190 V. This controlled voltage overshoot ensures effective protection while remaining within safe operating limits of downstream 300 V-rated components.
What is the meaning of the "HE3/51" suffix in 1N6303AHE3/51?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker-resistant matte tin plating; "/51" denotes packaging in 13" diameter paper tape and reel, with 51 units per reel - a standard configuration for automated SMT placement and high-volume production.
Can the 1N6303AHE3/51 be used in bi-directional configurations?
No, the 1N6303AHE3/51 is a uni-directional TVS diode, identified by its cathode band marking. For bi-directional protection at equivalent voltage ratings, Vishay offers the 1N6303CAHE3/51 variant - which uses a center-tap configuration and lacks polarity marking, enabling symmetric clamping on AC or floating lines.
1N6303AHE3/51 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6303AHE3/51 FAQ
1.How can I place an order for 1N6303AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6303AHE3/51 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 1N6303AHE3/51 reliable?
The price and inventory of 1N6303AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6303AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1N6303AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6303AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6303AHE3/51?
1N6303AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6303AHE3/51 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 1N6303AHE3/51?
For technical support, including 1N6303AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6303AHE3/51 requirements.
6.How does Aetrix verify that 1N6303AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6303AHE3/51 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 1N6303AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1N6303AHE3/51?
All 1N6303AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6303AHE3/51, 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 1N6303AHE3/51 part is unused and in its original packaging.
Return procedure for 1N6303AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6303AHE3/51 Tags
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