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Vishay General Semiconductor - Diodes Division 1N6285AHE3/51
- Part No.:
- 1N6285AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6285AHE3/51.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,544
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Product details
Overview
1N6285AHE3/51 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 39 V breakdown voltage (VBR min/max = 37.1–41.0 V at 1.0 mA), 33.3 V stand-off voltage (VWM), 53.9 V clamping voltage (VC) at 27.8 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 automotive and industrial control systems.
For engineers reviewing the 1N6285AHE3/51 datasheet, 1N6285AHE3/51 pinout, 1N6285AHE3/51 application, or 1N6285AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 175 °C max junction temperature, RoHS-compliant HE3 suffix (JESD 201 Class 2 whisker test), unidirectional polarity with cathode band marking, and compatibility with 1.5KE case-style PCB layouts requiring robust surge immunity up to 200 A IFSM.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage, it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry while maintaining clamped voltage below system withstand limits. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance.
Rated for 1500 W non-repetitive pulse power (10/1000 µs), it supports 200 A single-half-sine surge (8.3 ms) and dissipates 6.5 W continuously on infinite heatsink at TL = 75 °C. Thermal resistance is 15.4 °C/W junction-to-lead, enabling effective heat transfer through PCB copper pours or lead-frame conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines precise avalanche initiation threshold for reliable triggering before system damage |
| VWM | 33.3 V - maximum continuous reverse operating voltage; ensures no leakage conduction during normal 33 V rail operation |
| VC @ IPPM | 53.9 V at 27.8 A - clamped voltage during full 1500 W transient; must stay below protected device's absolute max rating |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform; validates suitability for lightning/inductive-switching surges |
| IFSM | 200 A - peak forward surge current rating (8.3 ms half-sine); supports high-energy transients without bond-wire failure |
| TJ max | +175 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package (0.375" lead length); compatible with standard through-hole wave-solder processes |
Pinout & Package
1N6285AHE3/51 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package: matte tin-plated leads, molded epoxy body meeting UL 94 V-0, cathode indicated by color band. Lead spacing is 0.210–0.285 inch (5.3–7.2 mm); body diameter 0.190–0.210 inch (4.8–5.3 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; carries full transient current during clamping |
| Cathode | Avalanche voltage reference / protected line connection | Connected to protected node (e.g., 33 V rail); voltage referenced to anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA at VWM), and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring zero-failure robustness |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) and ISO 7637-2 Pulse 5a/b when properly mounted with low-inductance layout |
| HE3 suffix | RoHS-compliant with JESD 201 Class 2 whisker resistance - eliminates tin whisker risk in high-reliability industrial and automotive assemblies |
| 175 °C junction rating | Enables use in high-temperature zones (e.g., near power converters or under-hood ECUs) without derating penalties |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 33 V supply rails in engine control modules against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input rail and chassis ground. Use Value: Clamps 1500 W surges to ≤53.9 V within <1 ns, preventing damage to MCU, CAN transceivers, and voltage regulators. |
Use Scenario: Safeguarding analog inputs of pressure/temperature sensors in factory automation PLCs exposed to relay coil kickback. IC Role / Device Role / Timing Role: Uni-directional TVS connected between sensor signal line and local ground, referenced to 3.3/5 V supply. Use Value: Limits induced spikes to <54 V while maintaining <1 µA leakage at 33.3 V stand-off, preserving signal integrity and ADC accuracy. |
| Telecom DC Feeder Protection | Consumer Power Adapter Output Protection |
Use Scenario: Shielding PoE-powered equipment front-ends from lightning-induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage upstream of DC-DC converter and isolation barrier. Use Value: Absorbs 10/1000 µs surges up to 27.8 A without degradation, meeting ITU-T K.21 Basic Protection requirements. |
Use Scenario: Overvoltage protection on secondary-side 33 V output of wall-mounted AC/DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Final-stage clamp between output rail and ground, after filtering and before connector. Use Value: Prevents output overvoltage events (e.g., feedback loop failure) from damaging connected devices, with fail-safe short-circuit behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A-E3/52 | Lower PPPM (600 W), smaller SMB package (surface-mount), VBR = 40–44.2 V, VC = 58.1 V @ 10.3 A | Designed for space-constrained PCBs; lacks AEC-Q101 qualification and 200 A IFSM rating | Select when board area is critical and surge energy is ≤600 W; verify thermal pad layout for SMB footprint. |
| 1.5KE39AHE3_A | Same electrical specs and 1.5KE package; differs only in revision code ("A" vs "X") and packaging (tape/reel vs bulk) | Identical functional performance; identical AEC-Q101 qualification and HE3 whisker compliance | Direct form-fit-function replacement; preferred for automated SMT assembly with 13" tape-and-reel delivery. |
Compared with SMBJ36A-E3/52, 1N6285AHE3/51 delivers 2.5× higher surge power handling and automotive-grade reliability; compared with 1.5KE39AHE3_A, it shares identical protection characteristics but differs in packaging format and reel configuration - making it optimal for manual or selective soldering in low-volume industrial repair and prototyping.
Availability
1N6285AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom DC power systems requiring stable component supply, long-lifecycle support, and AEC-Q101-qualified surge immunity.
Supply support for 1N6285AHE3/51 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 1N6285AHE3/51 belongs to Vishay's TRANSZORB® TVS family - engineered specifically for robust, millisecond-scale transient suppression in harsh environments where failure is not an option.
FAQ
What is the breakdown voltage tolerance of the 1N6285AHE3/51?
The 1N6285AHE3/51 has a specified breakdown voltage range of 37.1 V to 41.0 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 39 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable margining against protected device absolute maximum ratings in designs using the 1N6285AHE3/51.
Is the 1N6285AHE3/51 suitable for automotive applications?
Yes, the 1N6285AHE3/51 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood engine control units and body electronics. Its 175 °C maximum junction temperature, glass-passivated junction, and HE3 whisker-resistant plating meet stringent automotive reliability requirements - making the 1N6285AHE3/51 appropriate for ISO 7637-2 load dump and pulse testing in vehicle systems.
How does the 1N6285AHE3/51 differ from bi-directional TVS diodes like 1N6285CAHE3/51?
The 1N6285AHE3/51 is uni-directional, with a cathode band marking and forward voltage drop (~3.5 V at 100 A), intended for DC rail protection where polarity is fixed. In contrast, 1N6285CAHE3/51 is bi-directional, symmetric in both directions, and used in AC or floating signal lines. The 1N6285AHE3/51 cannot substitute for bi-directional types without circuit redesign due to polarity dependence and asymmetric IV characteristics.
What is the thermal resistance of the 1N6285AHE3/51, and how does it affect layout?
The 1N6285AHE3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W. This means efficient heat transfer relies on direct conduction through its axial leads into PCB copper pours or chassis ground. For sustained surge duty, designers should use wide copper traces (>250 mils) tied to internal ground planes - critical because the 1N6285AHE3/51's RθJA is 75 °C/W, making lead conduction the dominant cooling path.
Does the 1N6285AHE3/51 require external series impedance for optimal protection?
No, the 1N6285AHE3/51 functions as a self-limiting shunt device and does not require series impedance to operate. However, adding a small series resistor or ferrite bead upstream improves energy distribution during multi-pulse events and reduces di/dt stress on the 1N6285AHE3/51. Layout best practices - such as minimizing trace inductance between the 1N6285AHE3/51 and protected node - are more critical than external components for achieving its rated 53.9 V clamping performance.
1N6285AHE3/51 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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
1N6285AHE3/51 FAQ
1.How can I place an order for 1N6285AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6285AHE3/51 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 1N6285AHE3/51 reliable?
The price and inventory of 1N6285AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6285AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1N6285AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6285AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6285AHE3/51?
1N6285AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6285AHE3/51 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 1N6285AHE3/51?
For technical support, including 1N6285AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6285AHE3/51 requirements.
6.How does Aetrix verify that 1N6285AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6285AHE3/51 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 1N6285AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1N6285AHE3/51?
All 1N6285AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6285AHE3/51, 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 1N6285AHE3/51 part is unused and in its original packaging.
Return procedure for 1N6285AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6285AHE3/51 Tags
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