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Microchip Technology 1N5263BUR-1/TR
- Part No.:
- 1N5263BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5263BUR-1/TR.pdf
- Description:
- DIODE ZENER 56V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
1N5263BUR-1/TR from Microsemi is a surface-mount 56 V, 500 mW Zener diode in DO-213AA (SOD80) glass MELF package, rated for ±5% voltage tolerance at 2.2 mA test current, with 150 Ω dynamic impedance and +0.096 %/°C temperature coefficient-used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5263BUR-1/TR datasheet, 1N5263BUR-1/TR pinout, 1N5263BUR-1/TR application, or 1N5263BUR-1/TR equivalent, key selection criteria include Zener voltage stability across temperature, low leakage (<0.1 µA at 41 V), hermetic glass packaging for reliability, and compatibility with automated SMT assembly per EIA-481-B tape-and-reel.
Technical Context
This device operates as a reverse-biased voltage regulator in its breakdown region, with specified Zener voltage measured at IZT = 2.2 mA and thermal equilibrium at 30 ± 2 °C case temperature. Its metallurgically bonded glass construction ensures stable junction characteristics and radiation hardness per MicroNote 050.
It exhibits a positive temperature coefficient (+0.096 %/°C) above ~5 V, enabling predictable drift compensation in reference circuits. Maximum steady-state power dissipation is 0.5 W at end cap temperature <125 °C or ambient <50 °C on FR4 with 1 oz Cu.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 2.2 mA - defines regulation setpoint for feedback or clamping circuits |
| Power Dissipation (PD) | 0.5 W - limits continuous current to ~8.9 mA at 56 V without derating |
| Dynamic Impedance (ZZT) | 150 Ω at IZT = 2.2 mA - determines output voltage variation under load changes |
| Reverse Leakage (IR) | <0.1 µA at VR = 41 V - ensures minimal quiescent current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.096 %/°C - enables predictable voltage drift up to 175 °C junction temperature |
| Junction Temp. Range | –65 to +175 °C - supports operation in extended industrial and aerospace environments |
| Package | DO-213AA (SOD80) glass MELF - hermetically sealed, RoHS-compliant (e3), cathode band marked |
Pinout & Package
DO-213AA (SOD80) glass MELF package: cylindrical, metallurgically bonded, hermetically sealed, with tin-lead or matte-tin plating on end caps. Cathode indicated by single black band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference node / current sink | Connected to lower-potential rail; carries full Zener current in regulation mode |
| Cathode (banded end) | Regulated output / voltage source | Provides stable 56 V reference when reverse-biased; must be held at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount JEDEC-compatible Zener | Direct SMT replacement for through-hole 1N5263B-1, eliminating manual insertion and improving board density |
| Hermetic glass MELF construction | Prevents moisture ingress and long-term parameter drift; qualified per MIL-PRF-19500 screening options |
| Low capacitance | Typical CJ ≈ 2 pF (per Figure 3) - minimizes signal coupling in RF bias and timing circuits |
| Radiation-hardened design | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for space-qualified systems |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - withstands handling without special precautions |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for MCU I/O |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Precision voltage reference for optocoupler-based error amplifier loop. Use Value: Maintains ±1.5% output accuracy over –40 to +85 °C ambient due to tight 5% VZ tolerance and predictable +0.096 %/°C drift. |
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from transient surges. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to safe levels during ESD or inductive kick events. Use Value: Responds within nanoseconds with <0.1 µA leakage at 41 V, minimizing standby power loss while clamping >50 V transients. |
| High-Reliability Sensor Biasing | Aerospace Voltage Monitor Reference |
|
Use Scenario: Providing stable excitation voltage to precision RTD or bridge sensors in oil & gas monitoring. IC Role / Device Role / Timing Role: Low-drift, low-noise bias source ensuring measurement repeatability. Use Value: Hermetic DO-213AA package prevents humidity-induced drift; radiation hardness supports 10+ year field life in downhole tools. |
Use Scenario: Serving as calibration reference in satellite power management unit (PMU) voltage monitors. IC Role / Device Role / Timing Role: Primary Zener reference for ADC input scaling and fault threshold detection. Use Value: Qualified to MIL-PRF-19500 screening levels and inherently radiation-hard per MicroNote 050 - eliminates need for external shielding or redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5263B-1 | Same 56 V ±5%, but axial DO-35 (through-hole) package; no tape-and-reel option | Requires manual soldering or wave soldering; unsuitable for high-density SMT lines | Select 1N5263B-1 only for legacy repair, prototyping, or mixed-technology boards where SMT is not feasible. |
| BZX55-C56 | 56 V ±5%, DO-35 package, 500 mW rating; higher ZZT (200 Ω) and wider tempco (±0.1 %/°C) | Lower regulation precision and greater thermal drift; not radiation-hardened | Choose BZX55-C56 for cost-sensitive commercial designs where radiation tolerance and ultra-stable drift are not required. |
Compared with 1N5263B-1 and BZX55-C56, the 1N5263BUR-1/TR delivers SMT manufacturability, hermetic reliability, and radiation hardness-making it the sole choice for space-grade, high-reliability, or automated production environments requiring long-term parametric stability.
Availability
1N5263BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage monitors, sensor biasing circuits, and overvoltage protection systems requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5263BUR-1/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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and secure analog and mixed-signal ICs and discrete components.
The 1N5263BUR-1/TR belongs to Microsemi's legacy 1N52xxBUR-1 Zener series, engineered for mission-critical voltage regulation in defense, aerospace, and industrial systems where hermetic sealing, MIL-spec screening, and long-term stability are mandatory.
FAQ
What is the Zener voltage tolerance and test current for the 1N5263BUR-1/TR?
The 1N5263BUR-1/TR has a nominal Zener voltage of 56 V with a ±5% tolerance, verified at a test current (IZT) of 2.2 mA. This tolerance is guaranteed per the "B" suffix in the part number and applies under thermal equilibrium conditions at 30 ± 2 °C case temperature, as defined in Microsemi T4-LDS-0232-1 Rev. 1.
Is the 1N5263BUR-1/TR RoHS compliant?
Yes, the 1N5263BUR-1/TR is RoHS compliant (designated by the "e3" suffix in the full nomenclature), with annealed matte-tin plating on end caps. RoHS compliance applies only to commercial-grade versions; military-screened variants (e.g., JANTXV) are exempt and use tin-lead plating.
What is the maximum power dissipation and thermal derating behavior of the 1N5263BUR-1/TR?
The 1N5263BUR-1/TR has a steady-state power dissipation rating of 0.5 W at end cap temperature <125 °C or ambient <50 °C on FR4 with 1 oz Cu. Derating follows the curve in Figure 2 of T4-LDS-0232-1: power drops linearly to zero at 175 °C junction temperature, with RθJA = 250 °C/W on standard PCB layout.
Does the 1N5263BUR-1/TR have radiation hardness certification?
Yes, the 1N5263BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050, demonstrating tolerance to total ionizing dose (TID) without parameter shift degradation. It is commonly used in satellite power systems and nuclear instrumentation where radiation exposure exceeds 100 krad(Si).
What packaging format does the 1N5263BUR-1/TR ship in?
The 1N5263BUR-1/TR ships in EIA-481-B standard tape-and-reel format, indicated by the "TR" suffix. Reel quantities are configurable per factory consultation; standard carrier tape width is 8 mm, with pocket pitch of 4 mm and component orientation aligned to sprocket holes per specification.
1N5263BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5263BUR-1/TR FAQ
1.How can I place an order for 1N5263BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5263BUR-1/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 1N5263BUR-1/TR reliable?
The price and inventory of 1N5263BUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5263BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5263BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5263BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5263BUR-1/TR?
1N5263BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5263BUR-1/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 1N5263BUR-1/TR?
For technical support, including 1N5263BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5263BUR-1/TR requirements.
6.How does Aetrix verify that 1N5263BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5263BUR-1/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 1N5263BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5263BUR-1/TR?
All 1N5263BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5263BUR-1/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 1N5263BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5263BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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