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Microchip Technology 1N5280BUR-1
- Part No.:
- 1N5280BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5280BUR-1.pdf
- Description:
- DIODE ZENER 190V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,652
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Product details
Overview
1N5280BUR-1 from Microsemi is a 190 V, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) package with ±5% voltage tolerance, 2400 Ω dynamic impedance at 20 mA test current, and -65 °C to +175 °C operating temperature range, used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5280BUR-1 datasheet, 1N5280BUR-1 pinout, 1N5280BUR-1 application, or 1N5280BUR-1 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (100 °C/W junction-to-end-cap), low leakage (<0.1 µA at 144 V), radiation-hardened construction, and MIL-PRF-19500 upscreening capability.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 190 V at 20 mA test current (IZT), exhibiting a positive temperature coefficient of +0.110 %/°C and dynamic impedance (ZZT) of 2400 Ω. It maintains regulation across a broad current range (IZK = 0.25 mA to IZM ≈ 2.6 mA) and supports stable operation up to 175 °C junction temperature.
The metallurgically bonded glass MELF structure provides hermetic sealing, ESD insensitivity per MIL-STD-750 Method 1020, and minimal parasitic capacitance (~0.5 pF typical). Its DO-213AA package enables high-reliability mounting on FR4 PCBs with defined thermal derating above 50 °C ambient or 125 °C end-cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 190 V at 20 mA - defines precise regulation point for high-voltage reference applications |
| Power Dissipation (PD) | 0.5 W - limits continuous DC power handling; requires thermal management above 50 °C ambient |
| Zener Impedance (ZZT) | 2400 Ω @ IZT - determines output voltage stability under load variation |
| Reverse Leakage (IR) | <0.1 µA @ 144 V - ensures minimal error current in high-impedance reference paths |
| Temp Coefficient (αVZ) | +0.110 %/°C - quantifies voltage drift over temperature; critical for wide-range stability |
| Junction Temp Range | -65 °C to +175 °C - enables operation in aerospace, downhole, and military environments |
| Thermal Resistance | 100 °C/W (Junction-to-End Cap) - guides heatsinking design when mounted to metal chassis |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with two end-cap terminals; cathode identified by single band. No discrete pins-device is symmetric axial component with polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Regulated Output Terminal | Connected to positive side of load during Zener operation; carries full regulation current |
| Anode End Cap | Reference Ground Terminal | Biased negative relative to cathode; forms return path for Zener current and sensing |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical Bond Construction | Eliminates interfacial delamination risk under thermal cycling and mechanical stress |
| Radiation Hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space-grade designs |
| MIL-PRF-19500 Screening Option | Available with JAN/JANTX/JANTXV/JANS reliability levels for defense and aerospace programs |
| Low Capacitance | ~0.5 pF typical - preserves high-frequency response in RF bias and timing circuits |
| ESD Insensitivity | Qualified per MIL-STD-750 Method 1020 - no special handling required during assembly |
Applications
| High-Voltage Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating output of isolated DC-DC converters operating above 150 V. IC Role / Device Role / Timing Role: Zener diode provides stable 190 V reference for optocoupler-based feedback loop. Use Value: Tight 5% tolerance and low tempco ensure <±1.5% output variation over -55 °C to +125 °C. | Use Scenario: Providing primary voltage reference in satellite power management units. IC Role / Device Role / Timing Role: Standalone Zener reference replacing active references where radiation hardness is mandatory. Use Value: Inherent radiation tolerance eliminates need for shielding or redundancy, reducing SWaP-C. |
| Downhole Instrumentation Bias | Military Test Equipment Calibration |
Use Scenario: Biasing sensors and amplifiers in oil/gas well logging tools exposed to >150 °C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener sets gain and offset in analog front-ends. Use Value: Operation up to +175 °C junction temperature avoids derating or forced cooling in confined enclosures. | Use Scenario: Calibrating high-voltage measurement channels in field-deployable test sets. IC Role / Device Role / Timing Role: Precision 190 V reference source for DMM and oscilloscope calibration routines. Use Value: Hermetic DO-213AA package ensures long-term parameter stability and repeatability across maintenance cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5280B-1 | Same electrical specs but in axial DO-35 package; no MELF form factor or metallurgical bond | Lacks radiation hardness and hermetic sealing; unsuitable for high-reliability or space applications | Select only for cost-sensitive commercial PCBs where through-hole mounting is acceptable |
| SMF190A | Surface-mount SOD-123 package; 190 V, 1 W rating; higher power but larger Zz (3000 Ω) and wider tolerance (±10%) | Higher power dissipation but lower precision; not MIL-screenable or radiation-hardened | Choose when board space allows larger footprint and 1 W operation is needed over 0.5 W |
Compared with 1N5280B-1 and SMF190A, the 1N5280BUR-1 uniquely combines MELF packaging, metallurgical bonding, radiation hardness, and MIL-PRF-19500 screening readiness-making it the sole option for high-reliability 190 V reference designs requiring hermetic integrity and extreme temperature resilience.
Availability
1N5280BUR-1 is available at Aetrix Electronics and suitable for high-reliability power supply feedback, aerospace voltage reference, and downhole instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5280BUR-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, radiation-hardened, and aerospace-grade components.
The 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, designed specifically for mission-critical applications demanding hermetic sealing, MIL-spec compliance, and operation beyond commercial temperature limits.
FAQ
What is the Zener voltage tolerance for the 1N5280BUR-1?
The 1N5280BUR-1 has a nominal Zener voltage of 190 V with a guaranteed tolerance of ±5%, indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance applies at 25 °C with 20 mA test current and remains stable across its full operating temperature range due to its +0.110 %/°C temperature coefficient.
Does the 1N5280BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5280BUR-1 supports up-screening per MIL-PRF-19500. The base part number indicates commercial grade; reliability levels such as JAN, JANTX, JANTXV, or JANS can be specified via prefix (e.g., MQ, MX, MV, MSP) and require factory coordination. Screening includes extended environmental testing and lot traceability.
What is the maximum reverse leakage current for the 1N5280BUR-1?
The 1N5280BUR-1 exhibits a maximum reverse leakage current (IR) of 0.1 µA when biased at 144 V (75% of nominal VZ), measured at 25 °C. This ultra-low leakage ensures minimal error contribution in high-impedance reference circuits and precision feedback networks using the 1N5280BUR-1.
Is the 1N5280BUR-1 RoHS compliant?
Yes, RoHS-compliant versions of the 1N5280BUR-1 are available for commercial-grade use only, marked with the "e3" suffix (e.g., 1N5280BUR-1e3). These feature annealed matte-tin plating and meet JEDEC J-STD-609A Class 3 requirements. MIL-spec variants retain tin-lead plating per standard practice.
What package type does the 1N5280BUR-1 use, and how is polarity marked?
The 1N5280BUR-1 uses the DO-213AA (SOD-80/MELF) metallurgically bonded glass package. Polarity is marked by a single cathode band on one end cap; the banded end is the cathode and must be held positive relative to the anode end for proper Zener regulation in the 1N5280BUR-1.
1N5280BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 190 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 2400 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 144 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
1N5280BUR-1 FAQ
1.How can I place an order for 1N5280BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5280BUR-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 1N5280BUR-1 reliable?
The price and inventory of 1N5280BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5280BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5280BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5280BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5280BUR-1?
1N5280BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5280BUR-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 1N5280BUR-1?
For technical support, including 1N5280BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5280BUR-1 requirements.
6.How does Aetrix verify that 1N5280BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5280BUR-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 1N5280BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5280BUR-1?
All 1N5280BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5280BUR-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 1N5280BUR-1 part is unused and in its original packaging.
Return procedure for 1N5280BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5280BUR-1 Tags
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