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Microchip Technology 1N5281BUR-1
- Part No.:
- 1N5281BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5281BUR-1.pdf
- Description:
- DIODE ZENER 200V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,577
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Product details
Overview
1N5281BUR-1 from Microsemi is a 200 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in space-constrained industrial power supplies and reference circuits operating from -65 °C to +175 °C.
For engineers reviewing the 1N5281BUR-1 datasheet, 1N5281BUR-1 pinout, 1N5281BUR-1 application, or 1N5281BUR-1 equivalent, key selection factors include its 200 V nominal Zener voltage at 0.65 mA test current, 2500 Ω dynamic impedance at IZT, 0.1 µA max reverse leakage at 144 V, hermetically sealed metallurgical bond, and MIL-PRF-19500 upscreening capability.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with Zener voltage specified at IZT = 0.65 mA and temperature coefficient αVZ = +0.110 %/°C. Its metallurgically bonded glass construction ensures stable parametric performance across wide thermal excursions.
The 1N5281BUR-1 exhibits minimal capacitance (typ. <1.5 pF per Figure 3), low forward voltage (VF ≤ 1.1 V @ 200 mA), and inherent radiation hardness per MicroNote 050 - making it suitable for high-reliability analog signal conditioning and voltage clamping where ESD immunity and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 200 V at IZT = 0.65 mA - defines precise regulation point for high-voltage reference design |
| Power Dissipation PD | 0.5 W - limits continuous thermal load on PCB; derates linearly above 50 °C ambient |
| Zener Impedance ZZT | 2500 Ω at IZT - determines output voltage variation under load current changes |
| Reverse Leakage IR | ≤ 0.1 µA at VR = 144 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Temp Coefficient αVZ | +0.110 %/°C - quantifies voltage drift over temperature; enables accurate compensation in precision references |
| Junction Temp Range | -65 °C to +175 °C - supports operation in aerospace, downhole, and military environments |
| Package | DO-213AA (SOD-80/MELF) - hermetically sealed glass surface-mount package with end-cap terminations |
Pinout & Package
DO-213AA (SOD-80/MELF) glass package with metallurgically bonded internal structure; cathode identified by single band; terminals are solderable end caps with tin-lead or RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point in reverse-bias configuration | Must be held at higher potential than anode to enable Zener conduction and voltage regulation |
| Anode (unbanded end) | Zener cathode connection point in reverse-biased operation | Reference ground or lower-potential node; forms regulated output at cathode when biased correctly |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Prevents moisture ingress and parameter shift over time; enables >20-year field reliability in harsh environments |
| Metallurgical bonding | Eliminates wire bonds and interfacial delamination risk; improves thermal cycling endurance and power handling consistency |
| MIL-PRF-19500 upscreening option | Supports qualification to military screening levels (JAN/JANTX/JANTXV/JANS) via suffix coding |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - validated for total ionizing dose (TID) resilience |
| Low capacitance | Typical <1.5 pF (Figure 3) - preserves high-frequency signal integrity in RF bias and timing circuits |
Applications
| High-Voltage Reference Supply | Aerospace Power Monitoring |
|---|---|
Use Scenario: Stable 200 V reference for ADC input scaling and DAC feedback in satellite power management units. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed regulation point for analog front-end calibration. Use Value: Enables ±0.5% system-level voltage measurement accuracy over -55 °C to +125 °C due to tight 5% tolerance and known αVZ. |
Use Scenario: Overvoltage clamp in avionics bus protection circuitry exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy while holding rail voltage below 210 V. Use Value: Survives 260 °C reflow and >10⁵ thermal cycles without parameter shift, ensuring mission-critical fault containment. |
| Downhole Sensor Biasing | Industrial PLC Analog Input Protection |
Use Scenario: Bias voltage source for piezoresistive pressure sensors in oil/gas wellhead electronics operating at 175 °C. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference maintaining sensor excitation voltage under extreme thermal stress. Use Value: Junction temperature rating of +175 °C and zero ESD sensitivity (MIL-STD-750 Method 1020) ensure uninterrupted operation at depth. |
Use Scenario: Input-stage voltage clamp protecting 24 V analog input channels from field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Fast-response shunt limiter diverting transient current before downstream op-amps saturate. Use Value: Low 2500 Ω dynamic impedance minimizes clamping voltage overshoot during 100 ns transients per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5281B-1 | Axial DO-35 package; identical electrical specs but non-surface-mount; no MELF mechanical robustness | Preferred for through-hole prototyping or legacy board redesigns where rework tolerance is prioritized over density | Select 1N5281B-1 only if SMT assembly infrastructure is unavailable or thermal cycling demands are below 5000 cycles |
| BZX84-C200 | SOT-23 package; 200 V ±5%; 300 mW rating; 1000 Ω ZZT; higher leakage (≤1 µA @ 160 V) | Used in cost-sensitive consumer-grade power rails where radiation hardness and hermeticity are not required | Choose BZX84-C200 only for commercial-grade applications with ambient <85 °C and no TID exposure requirements |
Compared with 1N5281B-1 and BZX84-C200, the 1N5281BUR-1 delivers superior thermal endurance (-65 °C to +175 °C), hermetic reliability, and radiation tolerance - making it the sole choice for aerospace, downhole, and military systems where failure is not an option.
Availability
1N5281BUR-1 is available at Aetrix Electronics and suitable for high-reliability power supply reference, aerospace voltage monitoring, and industrial sensor biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5281BUR-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 defense, aerospace, and industrial markets.
The 1N52xxBUR-1 series belongs to Microsemi's legacy high-stability Zener voltage regulator product line, engineered specifically for applications demanding hermetic sealing, wide temperature operation, and MIL-spec compliance.
FAQ
What is the Zener voltage tolerance for 1N5281BUR-1?
The 1N5281BUR-1 has a nominal Zener voltage of 200 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance applies at 25 °C with IZT = 0.65 mA and is maintained across the full -65 °C to +175 °C junction temperature range per the published electrical characteristics table.
Does 1N5281BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5281BUR-1 supports MIL-PRF-19500 upscreening via optional reliability level suffixes (e.g., MQ, MX, MV, MSP) per the part nomenclature guide. The base "UR-1" designation indicates the commercial-grade metallurgically bonded surface-mount variant, and qualified versions are available upon request with full test documentation.
What is the maximum reverse leakage current for 1N5281BUR-1?
The maximum reverse leakage current (IR) for 1N5281BUR-1 is 0.1 µA when measured at VR = 144 V and TA = 25 °C. This ultra-low leakage ensures minimal power loss in high-impedance bias networks and maintains regulation accuracy in low-current reference designs.
Is 1N5281BUR-1 RoHS compliant?
Yes, RoHS-compliant versions of 1N5281BUR-1 are available with the "e3" suffix (e.g., 1N5281BUR-1e3), featuring annealed matte-tin plating. These are offered for commercial-grade use only; MIL-spec variants retain tin-lead terminations per standard requirements.
What package type does 1N5281BUR-1 use?
The 1N5281BUR-1 uses the DO-213AA package - also known as SOD-80 or MELF - a hermetically sealed glass surface-mount device with metallurgically bonded internal structure and solderable end-cap terminations. Its dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length.
1N5281BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 2500 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 152 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
1N5281BUR-1 FAQ
1.How can I place an order for 1N5281BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5281BUR-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 1N5281BUR-1 reliable?
The price and inventory of 1N5281BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5281BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5281BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5281BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5281BUR-1?
1N5281BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5281BUR-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 1N5281BUR-1?
For technical support, including 1N5281BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5281BUR-1 requirements.
6.How does Aetrix verify that 1N5281BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5281BUR-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 1N5281BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5281BUR-1?
All 1N5281BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5281BUR-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 1N5281BUR-1 part is unused and in its original packaging.
Return procedure for 1N5281BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5281BUR-1 Tags
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