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Microchip Technology 1N483BUR/TR
- Part No.:
- 1N483BUR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N483BUR/TR.pdf
- Description:
- SIGNAL OR COMPUTER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:8,385
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Product details
Overview
1N483BUR/TR from Microsemi is a hermetically sealed glass switching diode with metallurgically bonded double-plug construction, 225 V DC reverse voltage rating, 200 mA maximum operating current at 25°C, and -65°C to +175°C operating temperature range-used in high-reliability power supply clamp and transient suppression circuits.
For engineers reviewing the 1N483BUR/TR datasheet, 1N483BUR/TR pinout, 1N483BUR/TR application, or 1N483BUR/TR equivalent, key selection criteria include its hermetic glass package, 500 mW total power dissipation at 25°C, 2 A surge current capability, 0.8–1.0 V forward voltage at 100 mA, and 0.025 µA max reverse leakage at 225 V.
Technical Context
This diode employs metallurgical bonding and double-plug construction for enhanced thermal stability and reliability under extreme temperature cycling. Its hermetically sealed glass package eliminates moisture ingress and supports operation from -65°C to +175°C without parameter drift.
The device exhibits low forward voltage (0.8–1.0 V at 100 mA) and ultra-low reverse leakage (≤0.025 µA at 225 V), enabling efficient clamping in high-impedance signal paths and precision voltage reference protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC Reverse Voltage (VRWM) | 225 V - Maximum continuous reverse-bias voltage before breakdown; defines clamping threshold in overvoltage protection. |
| Forward Voltage (VF) | 0.8–1.0 V at 100 mA - Low conduction loss enables minimal power dissipation in series-switching applications. |
| Max Operating Current | 200 mA at 25°C - Sustained forward current limit; derates linearly to 50 mA at 150°C. |
| Total Power Dissipation | 500 mW at 25°C - Thermal design basis; requires 3 mW/°C derating above ambient. |
| Surge Current (8.3 ms) | 2 A - Withstands short-duration transients common in inductive load switching and ESD events. |
| Reverse Leakage (IR) | ≤0.025 µA at 225 V - Ensures negligible standby current in high-impedance bias networks. |
Pinout & Package
Hermetically sealed glass package with axial leads; cathode identified by blue band on body; lead material is copper-clad steel with tin/lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in clamping or rectification path; accepts up to 200 mA DC. |
| Cathode | Forward current exit / reverse-blocking terminal | Banded end; withstands up to 225 V reverse bias; critical for polarity-sensitive protection circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass package | Eliminates moisture-induced failure modes; qualified for aerospace and downhole industrial environments. |
| Metallurgically bonded junction | Improves thermal interface resistance and long-term bond integrity under thermal cycling stress. |
| Double-plug construction | Enhances mechanical robustness and hermetic seal reliability during thermal shock and vibration. |
| Wide temperature operation | Supports uninterrupted function across -65°C to +175°C without parameter re-characterization. |
Applications
| Power Supply Clamp | High-Temp Sensor Interface |
|---|---|
Use Scenario: Clamping transient spikes on DC rails in avionics power converters. IC Role / Device Role / Timing Role: Fast-switching voltage clamp protecting downstream regulators and FET gate drivers. Use Value: 225 V VRWM and 2 A surge rating suppress >90% of MIL-STD-1275B Class III transients without degradation. | Use Scenario: Reverse-polarity protection in oil-well pressure sensor modules operating at 150°C. IC Role / Device Role / Timing Role: Series blocking diode preventing damage from accidental battery reversal in harsh-environment telemetry units. Use Value: Maintains ≤0.025 µA leakage and 50 mA rated current at 150°C-enabling stable bias in high-impedance Wheatstone bridges. |
| ESD-Sensitive Signal Line | Military Radio Bias Network |
Use Scenario: Input protection for RF front-end LNAs exposed to human-body-model ESD events. IC Role / Device Role / Timing Role: Low-capacitance clamping diode shunting ESD energy to ground while preserving signal integrity. Use Value: Sub-1 pF junction capacitance (inferred from glass package and small die) minimizes RF insertion loss below 2 GHz. | Use Scenario: Bias feed isolation in UHF transceiver synthesizer VCO control lines. IC Role / Device Role / Timing Role: DC blocking and RF decoupling element maintaining stable tuning voltage under RF modulation. Use Value: 0.8–1.0 V VF ensures minimal voltage drop in precision 5 V bias rails; hermetic seal prevents parametric shift in humid field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LL483B | Same die and electrical specs; plastic DO-35 package instead of hermetic glass. | Limited to -65°C to +125°C operation; unsuitable for >125°C or high-humidity environments. | Select LL483B only for cost-sensitive commercial-grade designs where hermeticity and extended temperature are not required. |
| CDLL483B | Same electrical ratings; surface-mount SOD-323 package with tin/lead finish. | No axial leads; requires rework of PCB layout; thermal resistance differs due to package geometry. | Choose CDLL483B when automated assembly and board space reduction outweigh the need for axial-lead serviceability or legacy through-hole compatibility. |
Compared with 1N483BUR/TR, LL483B sacrifices hermetic sealing and high-temperature capability for lower cost, while CDLL483B trades axial-leaded reliability and thermal performance for SMT manufacturability-neither is pin-compatible, and both require layout or thermal redesign.
Availability
1N483BUR/TR is available at Aetrix Electronics and suitable for avionics power clamping, downhole sensor protection, military radio bias networks, and ESD-critical RF interfaces requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for 1N483BUR/TR 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
Microsemi (now part of Microchip Technology) is a semiconductor manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N483BUR/TR belongs to Microsemi's legacy high-temperature switching diode product line, engineered for mission-critical applications demanding hermetic sealing, wide thermal range, and proven field reliability under extreme environmental stress.
FAQ
What is the maximum reverse voltage rating for the 1N483BUR/TR?
The 1N483BUR/TR has a DC reverse voltage (VRWM) rating of 225 V. This value represents the maximum continuous reverse-bias voltage the diode can withstand without entering breakdown. It is specified at 25°C and remains valid across the full -65°C to +175°C operating temperature range, making the 1N483BUR/TR suitable for high-voltage clamping in demanding environments.
Does the 1N483BUR/TR have a specified forward voltage, and under what conditions?
Yes, the 1N483BUR/TR has a forward voltage (VF) of 0.8–1.0 V at 100 mA forward current and 25°C ambient temperature. This low VF range reflects its metallurgically bonded junction and contributes to reduced conduction losses in series-switching or clamping configurations. The 1N483BUR/TR maintains stable VF behavior across its full temperature range due to hermetic packaging.
Is the 1N483BUR/TR suitable for use above 125°C?
Yes, the 1N483BUR/TR is explicitly rated for operation from -65°C to +175°C. Its hermetically sealed glass package and double-plug construction ensure parameter stability and long-term reliability at elevated temperatures. At 150°C, it retains a rated forward current of 50 mA with 1.0 mA/°C derating above that point-confirming suitability for downhole, engine bay, and avionics applications exceeding 125°C.
What does the "TR" suffix indicate in 1N483BUR/TR?
The "TR" suffix in 1N483BUR/TR denotes tape-and-reel packaging for automated surface-mount assembly. While the 1N483BUR/TR retains axial leads and is physically through-hole mountable, the TR variant is supplied on industry-standard 7-inch reels with embossed carrier tape, enabling pick-and-place handling. The electrical and thermal specifications of the 1N483BUR/TR are identical to the bulk or ammo-pack versions.
How does the hermetic glass package of the 1N483BUR/TR improve reliability compared to plastic diodes?
The hermetic glass package of the 1N483BUR/TR prevents moisture ingress, ionic contamination, and outgassing-key failure mechanisms in plastic-packaged diodes under thermal cycling or high-humidity conditions. This construction enables the 1N483BUR/TR to maintain consistent VF, IR, and VRWM over decades of field use in aerospace, oilfield, and military systems where long-term parametric stability is non-negotiable.
1N483BUR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 225 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 250 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
- Operating Temperature - Junction:
- -65°C ~ 175°C
1N483BUR/TR FAQ
1.How can I place an order for 1N483BUR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N483BUR/TR 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 1N483BUR/TR reliable?
The price and inventory of 1N483BUR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N483BUR/TR is usually 5 days.
3.What payment methods are accepted for 1N483BUR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N483BUR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N483BUR/TR?
1N483BUR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N483BUR/TR 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 1N483BUR/TR?
For technical support, including 1N483BUR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N483BUR/TR requirements.
6.How does Aetrix verify that 1N483BUR/TR is sourced from the original manufacturer or authorized distributors?
All 1N483BUR/TR 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 1N483BUR/TR meets industry standards.
7.What is the process for return or replacement of 1N483BUR/TR?
All 1N483BUR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N483BUR/TR, 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 1N483BUR/TR part is unused and in its original packaging.
Return procedure for 1N483BUR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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