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Microchip Technology 1N5277BUR-1
- Part No.:
- 1N5277BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5277BUR-1.pdf
- Description:
- DIODE ZENER 160V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,973
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Product details
Overview
1N5277BUR-1 from Microsemi is a 160 V, ±5% tolerance, 500 mW surface-mount Zener diode in a hermetically sealed DO-213AA (SOD80) MELF 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 1N5277BUR-1 datasheet, 1N5277BUR-1 pinout, 1N5277BUR-1 application, or 1N5277BUR-1 equivalent, this page delivers verified electrical specs, thermal derating behavior, Zener impedance at test current, temperature coefficient, and RoHS-compliant packaging details critical for high-reliability analog design.
Technical Context
The 1N5277BUR-1 operates as a reverse-biased voltage reference with nominal VZ = 160 V at IZT = 0.80 mA, exhibiting αVZ = +0.110 %/°C and dynamic impedance ZZT = 1700 Ω. Its metallurgically bonded glass construction ensures stable breakdown characteristics across wide temperature excursions.
It is rated for 0.5 W steady-state dissipation with RθJA = 250 °C/W on FR4 (1 oz Cu), requiring end-cap temperature TEC < 125 °C or ambient TA < 50 °C for full power operation - consistent with MIL-PRF-19500 up-screening options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 160 V at 0.80 mA test current - sets precise regulation point for high-voltage bias/reference networks |
| Power Dissipation PD | 0.5 W maximum - defines safe continuous operating envelope under thermal constraints |
| Zener Impedance ZZT | 1700 Ω at IZT - determines output voltage stability under load current variation |
| Temp. Coefficient αVZ | +0.110 %/°C - quantifies VZ drift over temperature; requires compensation in precision references |
| Reverse Leakage IR | ≤ 0.1 µA at 122 V - ensures minimal error current in high-impedance reference legs |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in aerospace, downhole, and military environments |
| Package | DO-213AA (SOD80) MELF - hermetic glass body with end-cap terminations for reliability and thermal performance |
Pinout & Package
DO-213AA (SOD80) MELF package: hermetically sealed cylindrical glass body with tin-lead or RoHS-compliant matte-tin plated end caps; cathode indicated by single band; polarity: banded end positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or low-side return path in shunt regulator topology |
| Cathode (banded end) | Zener regulation node | Connected to input supply rail; maintains 160 V potential relative to anode when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling, ensuring long-term VZ stability |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift in humid or corrosive environments |
| MIL-PRF-19500 up-screening option | Enables qualification for defense/aerospace applications with traceable lot-level screening data |
| Low capacitance (typ. <1 pF) | Minimizes AC coupling and noise injection in high-frequency reference or timing circuits |
| Radiation hardness | Inherently tolerant to total ionizing dose per Microsemi MicroNote 050 - suitable for space-grade designs |
Applications
| High-Voltage Power Supply Reference | Industrial Sensor Excitation |
|---|---|
Use Scenario: Stabilizing feedback divider in 200–300 V DC-DC converter output stage. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 160 V reference point for error amplifier comparison. Use Value: Enables ±0.5% output regulation despite line/load transients due to tight 5% VZ tolerance and low ZZT. | Use Scenario: Biasing bridge-based pressure transducers in oilfield instrumentation. IC Role / Device Role / Timing Role: High-impedance excitation source delivering stable 160 V to sensor Wheatstone bridge. Use Value: Low leakage (<0.1 µA) prevents measurement offset drift; hermetic package withstands 125 °C wellhead temperatures. |
| Avionics Voltage Clamp | Test Equipment Calibration Reference |
Use Scenario: Overvoltage protection for 150 V avionics bus monitoring circuitry. IC Role / Device Role / Timing Role: Transient voltage clamp absorbing surge energy above 160 V threshold. Use Value: Fast response and radiation-hardened structure ensure fault containment without latch-up in flight-critical systems. | Use Scenario: Primary reference in portable high-voltage calibration source for multimeters. IC Role / Device Role / Timing Role: Precision shunt reference used to calibrate 100–200 V measurement ranges. Use Value: Temperature coefficient (+0.110 %/°C) enables software compensation; DO-213AA mechanical stability supports metrology-grade repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5277B-1 | Same VZ, tolerance, and electrical specs; axial DO-35 package instead of surface-mount DO-213AA | Requires through-hole PCB layout and wave-solder process; unsuitable for automated SMT assembly | Select 1N5277B-1 only when legacy through-hole compatibility or manual prototyping is required |
| BZX84-C160 | 160 V Zener in SOT-23; 350 mW rating; higher ZZT (~2500 Ω); ±5% tolerance; not radiation-hardened | Limited to commercial-grade, lower-power applications; lacks MIL-PRF-19500 screening and hermetic seal | Choose BZX84-C160 for cost-sensitive consumer electronics where radiation hardness and extended temperature range are unnecessary |
Compared with 1N5277B-1 and BZX84-C160, the 1N5277BUR-1 uniquely combines surface-mount MELF reliability, hermetic sealing, radiation hardness, and high-temperature operation - making it irreplaceable in aerospace, downhole, and defense systems where failure modes must be eliminated.
Availability
1N5277BUR-1 is available at Aetrix Electronics and suitable for high-reliability power supply reference, avionics voltage clamping, and industrial sensor excitation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5277BUR-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 developed to deliver JEDEC-standard Zener performance in a robust, surface-mount MELF package optimized for mission-critical voltage regulation where hermeticity, thermal resilience, and long-term parametric stability are mandatory.
FAQ
What is the Zener voltage and test current for the 1N5277BUR-1?
The 1N5277BUR-1 has a nominal Zener voltage VZ of 160 V measured at a test current IZT of 0.80 mA. This value is guaranteed within ±5% tolerance at 25 °C and defines the primary regulation point for shunt reference applications. The device maintains this voltage across its specified operating current range while exhibiting a temperature coefficient of +0.110 %/°C.
Is the 1N5277BUR-1 RoHS compliant?
Yes, the 1N5277BUR-1 is available in RoHS-compliant versions (marked with suffix "e3") for commercial-grade use. These variants feature annealed matte-tin plating on end caps and meet lead-free soldering requirements per J-STD-020. Non-RoHS versions (blank suffix) use tin-lead plating and are intended for legacy or high-reliability applications where Pb-based solder is specified.
What is the maximum power dissipation and thermal derating behavior of the 1N5277BUR-1?
The 1N5277BUR-1 is rated for 0.5 W steady-state power dissipation. Full power is allowed only when the end-cap temperature remains below 125 °C or ambient temperature stays below 50 °C on FR4 board (1 oz Cu). Derating follows a linear curve beyond those limits, with RθJA = 250 °C/W defining the thermal resistance from junction to ambient under standard mounting conditions.
Does the 1N5277BUR-1 have radiation hardness certification?
Yes, the 1N5277BUR-1 is inherently radiation-hardened per Microsemi MicroNote 050, which documents its tolerance to total ionizing dose (TID) without parametric degradation. While not individually certified to MIL-STD-883, its metallurgically bonded glass construction and process heritage make it suitable for low-earth orbit and terrestrial radiation environments where hardened discrete Zeners are required.
What package type does the 1N5277BUR-1 use and how is polarity marked?
The 1N5277BUR-1 uses the DO-213AA (SOD80) MELF package - a hermetically sealed cylindrical glass body with metallized end caps. Polarity is marked by a single cathode band on the glass surface; during Zener operation, the banded end is held positive relative to the unbanded (anode) end. This marking aligns with JEDEC standard orientation for MELF diodes.
1N5277BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 160 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1700 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 122 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
1N5277BUR-1 FAQ
1.How can I place an order for 1N5277BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5277BUR-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 1N5277BUR-1 reliable?
The price and inventory of 1N5277BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5277BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5277BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5277BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5277BUR-1?
1N5277BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5277BUR-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 1N5277BUR-1?
For technical support, including 1N5277BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5277BUR-1 requirements.
6.How does Aetrix verify that 1N5277BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5277BUR-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 1N5277BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5277BUR-1?
All 1N5277BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5277BUR-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 1N5277BUR-1 part is unused and in its original packaging.
Return procedure for 1N5277BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5277BUR-1 Tags
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