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Microchip Technology 1N5263BUR-1
- Part No.:
- 1N5263BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5263BUR-1.pdf
- Description:
- DIODE ZENER 56V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,287
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Product details
Overview
1N5263BUR-1 from Microsemi is a 500 mW surface-mount Zener diode with a nominal Zener voltage of 56 V at 2.2 mA test current, ±5% tolerance (B suffix), and 150 Ω dynamic impedance at IZT. It features hermetically sealed DO-213AA (SOD80/MLL34) MELF glass package, -65 °C to +175 °C junction temperature range, and is used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5263BUR-1 datasheet, 1N5263BUR-1 pinout, 1N5263BUR-1 application, or 1N5263BUR-1 equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient (+0.096 %/°C), low leakage (<0.1 µA @ 43 V), thermal resistance (RθJA = 250 °C/W), and MIL-PRF-19500 up-screening eligibility.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, delivering stable 56 V regulation across 0.25 mA to 2.2 mA operating current (IZK to IZT). Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050.
The 1N5263BUR-1 exhibits a positive temperature coefficient of +0.096 %/°C, indicating increasing Zener voltage with rising temperature - critical for thermal drift compensation in analog references. Its 1300 Ω Zener impedance at IZK = 0.25 mA and 150 Ω at IZT = 2.2 mA defines regulation stiffness under varying load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 56 V ±5% at 2.2 mA - sets precise regulation point for feedback networks |
| Power Dissipation | 0.5 W - limits continuous DC power handling on FR4 board with 1 oz Cu |
| Dynamic Impedance | 150 Ω at IZT = 2.2 mA - determines output voltage variation under load changes |
| Temp. Coefficient αVZ | +0.096 %/°C - quantifies voltage drift over -65 °C to +175 °C operating range |
| Reverse Leakage IR | <0.1 µA at 43 V - ensures minimal shunt current in high-impedance bias networks |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in extended industrial and aerospace environments |
| Package Type | DO-213AA (SOD80/MLL34) MELF - enables automated placement and hermetic reliability |
Pinout & Package
DO-213AA (SOD80/MLL34) metallurgically bonded glass MELF package with cathode band marking; terminals are end caps, polarity defined by banded end (cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 56 V relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| MIL-PRF-19500 up-screening option | Enables qualification for military/aerospace applications with traceable screening records |
| Radiation hardness (per MicroNote 050) | Supports use in space-grade and nuclear instrumentation without derating |
| Low capacitance (typ. ~1.5 pF) | Minimizes signal coupling in high-frequency reference and timing circuits |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift - simplifies handling and assembly |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides voltage reference for optocoupler-based feedback in isolated 48–60 V output DC-DC converters. IC Role / Device Role / Timing Role: Zener reference node defining secondary-side regulation threshold. Use Value: 56 V rating matches typical auxiliary winding voltages; ±5% tolerance ensures stable loop gain across production lots. |
Use Scenario: Supplies stable excitation voltage to bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric sensor excitation. Use Value: +0.096 %/°C tempco allows predictable drift compensation; hermetic seal prevents humidity-induced offset drift. |
| Avionics Voltage Monitor | Test Equipment Calibration Reference |
Use Scenario: Monitors 28 V aircraft bus health via resistive divider into comparator input. IC Role / Device Role / Timing Role: Clamped reference protecting comparator against overvoltage transients. Use Value: 175 °C max junction temperature supports operation near engine bays; radiation hardness meets DO-160E Section 22 requirements. |
Use Scenario: Serves as secondary voltage standard in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Stable DC reference traceable to primary standards. Use Value: Low 0.1 µA leakage preserves high-impedance divider accuracy; DO-213AA package enables repeatable probe contact geometry. |
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 (DO-35) | Axial-leaded DO-35 package; identical electrical specs but higher RθJA (300 °C/W) and no MIL up-screening path | Suitable for prototyping and through-hole PCBs; not recommended for high-density SMT or screened programs | Select 1N5263B-1 only if manual assembly or legacy footprint compatibility is required |
| BZX55C56 (Vishay) | 5% tolerance, 500 mW, DO-35; Zener impedance 170 Ω at 5 mA; tempco +0.095 %/°C; no radiation hardness claim | Commercial-grade replacement where MIL spec or radiation tolerance is not mandated | Choose BZX55C56 for cost-sensitive consumer applications with standard JEDEC footprint needs |
Compared with 1N5263B-1 and BZX55C56, the 1N5263BUR-1 delivers superior thermal performance in SMT layouts, formal MIL-PRF-19500 qualification path, and verified radiation hardness - making it the sole choice for flight-critical and high-reliability embedded references.
Availability
1N5263BUR-1 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, avionics monitoring circuits, and test equipment calibration requiring stable component supply with guaranteed long-term availability.
Supply support for 1N5263BUR-1 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 analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-compatible Zener regulation in hermetic surface-mount form, targeting applications demanding extended temperature operation, ESD immunity, and qualification-ready reliability.
FAQ
What is the Zener voltage tolerance of the 1N5263BUR-1?
The 1N5263BUR-1 has a nominal Zener voltage of 56 V with a ±5% tolerance, indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance applies at 2.2 mA test current and 25 °C ambient, and is maintained across the full -65 °C to +175 °C junction temperature range per specification.
Does the 1N5263BUR-1 have a specified maximum reverse leakage current?
Yes - the 1N5263BUR-1 specifies a maximum reverse leakage current of 0.1 µA at 43 V (VR = 0.76 × VZ), measured at 25 °C. This low leakage supports high-impedance bias networks and minimizes error in precision reference applications where shunt current must be tightly controlled.
What is the thermal resistance of the 1N5263BUR-1, and how does it affect PCB layout?
The 1N5263BUR-1 has a junction-to-ambient thermal resistance (RθJA) of 250 °C/W when mounted on an FR4 board with 1 oz copper and Microsemi's recommended footprint. To maintain safe operation at full 0.5 W dissipation, the end cap temperature must stay below 125 °C - requiring adequate copper area and airflow in layout design.
Is the 1N5263BUR-1 RoHS compliant?
Yes - the 1N5263BUR-1 is available in RoHS-compliant versions marked with the "e3" suffix (e.g., 1N5263BUR-1e3), featuring annealed matte-tin plating on end caps. RoHS compliance applies only to commercial-grade units; screened versions follow MIL-PRF-19500 requirements and may retain leaded finishes.
Can the 1N5263BUR-1 be used in radiation-intensive environments?
Yes - the 1N5263BUR-1 is inherently radiation hard per Microsemi MicroNote 050, validated for total ionizing dose (TID) resilience without parameter degradation. This makes the 1N5263BUR-1 suitable for satellite power systems, nuclear instrumentation, and other high-radiation applications where standard Zeners would degrade.
1N5263BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N5263BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5263BUR-1 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 reliable?
The price and inventory of 1N5263BUR-1 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 is usually 5 days.
3.What payment methods are accepted for 1N5263BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5263BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5263BUR-1?
1N5263BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5263BUR-1 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?
For technical support, including 1N5263BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5263BUR-1 requirements.
6.How does Aetrix verify that 1N5263BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5263BUR-1 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 meets industry standards.
7.What is the process for return or replacement of 1N5263BUR-1?
All 1N5263BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5263BUR-1, 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 part is unused and in its original packaging.
Return procedure for 1N5263BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5263BUR-1 Tags
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BZT52C5V6T-7
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MMSZ4682T1G
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MM5Z5V1ST1G
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