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Microchip Technology 1N3027BUR-1/TR
- Part No.:
- 1N3027BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3027BUR-1/TR.pdf
- Description:
- DIODE ZENER 20V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N3027BUR-1/TR from Microsemi is a hermetically sealed, metallurgically bonded surface-mount Zener diode in DO-213AB (MELF/LL41) package, rated for 1 W DC power dissipation, with nominal Zener voltage of 20 V at 12.5 mA test current, dynamic impedance of 750 Ω at IZT, and maximum reverse leakage current of 0.25 µA at 15.2 V. It serves as a precision voltage reference or regulation element in high-reliability power supply feedback paths.
For engineers reviewing the 1N3027BUR-1/TR datasheet, 1N3027BUR-1/TR pinout, 1N3027BUR-1/TR application, or 1N3027BUR-1/TR equivalent, key selection criteria include its ±5% Zener tolerance (B-grade), -55°C to +175°C operating junction temperature range, 50 °C/W junction-to-end-cap thermal resistance, RoHS-compliant commercial variants, and MIL-PRF-19500/115 qualification options (JAN/JANTX/JANTXV).
Technical Context
This device implements a glass-encapsulated, double-plug Zener structure with metallurgically enhanced internal contact design to achieve low thermal resistance and stable breakdown characteristics across wide temperature and current ranges. Its DO-213AB MELF outline enables high-density PCB placement while maintaining hermeticity and radiation hardness per MicroNote 050.
The 1N3027BUR-1/TR operates with cathode band polarity-requiring the banded end to be biased positive relative to the anode for Zener regulation-and exhibits a Zener voltage temperature coefficient of +0.092 %/°C, indicating positive drift with rising temperature. Reverse leakage remains ≤0.25 µA up to 15.2 V at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal at 12.5 mA test current - defines regulation setpoint in feedback loops |
| Power Dissipation (PD) | 1.0 W at TEC ≤ 125 °C - derates linearly to zero at 175 °C; sets max continuous thermal load |
| Zener Impedance (ZZT) | 750 Ω at IZT = 12.5 mA - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | ≤ 0.25 µA at VR = 15.2 V - ensures minimal error current in high-impedance reference nodes |
| Junction Temp Range | -55 °C to +175 °C - supports operation in aerospace, downhole, and military environments |
| Thermal Resistance (RθJEC) | 50 °C/W - enables direct thermal coupling to PCB copper or heatsinking end caps |
| Forward Voltage (VF) | 1.2 V at 200 mA - relevant for forward-biased protection or clamping use cases |
Pinout & Package
DO-213AB (MELF/LL41) hermetically sealed glass package with axial symmetry; cathode identified by single black band. No discrete pins-device has two axially aligned metallized end caps serving as anode and cathode terminals. Mounting requires matching COE substrate (≈+6 ppm/°C) and EIA-481-1-A compatible 12 mm tape-and-reel packaging (TR suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band End | Zener Regulation Terminal | Banded end must be biased positive relative to opposite end to enter breakdown; connects to regulated node |
| Opposite End | Anode Terminal | Reference or ground connection point; completes Zener bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass Construction | Eliminates moisture ingress and long-term parameter drift-critical for 20+ year field reliability |
| Metallurgically Bonded Junction | Reduces thermal resistance and improves transient power handling vs. solder-bonded alternatives |
| MIL-PRF-19500/115 Qualification | Available in JAN/JANTX/JANTXV levels-meets screening, testing, and traceability requirements for defense programs |
| Low ESD Sensitivity | No special handling required-simplifies assembly and reduces manufacturing yield loss |
| Radiation Hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050-valid for space-qualified designs |
Applications
| Avionics Power Monitoring | Downhole Sensor Reference |
|---|---|
Use Scenario: Voltage reference in isolated DC-DC converter feedback networks for flight control systems. IC Role / Device Role / Timing Role: Zener diode providing stable 20 V reference for optocoupler-based error amplification. Use Value: Hermetic seal and -55°C to +175°C rating ensure regulation integrity during rapid thermal cycling and vibration exposure. |
Use Scenario: Precision biasing of analog front-end circuitry in oil/gas well logging tools. IC Role / Device Role / Timing Role: Voltage clamp and reference source for 24 V industrial bus interfaces exposed to >150 °C ambient. Use Value: Metallurgical bonding and 50 °C/W RθJEC enable stable operation without external heatsinking in confined tool housings. |
| Military Radio Transceiver Bias | Satellite Payload Voltage Regulation |
Use Scenario: Regulator for RF power amplifier bias rails in handheld tactical radios. IC Role / Device Role / Timing Role: Zener shunt regulator stabilizing 20 V supply feeding GaN driver stages. Use Value: 750 Ω ZZT and <0.25 µA IR minimize ripple-induced distortion and quiescent current error. |
Use Scenario: Radiation-tolerant reference in star tracker power management subsystems. IC Role / Device Role / Timing Role: Primary voltage reference for ADCs and DACs in attitude determination circuits. Use Value: Inherent TID hardness per MicroNote 050 eliminates need for shielding or redundancy overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3027B-1 | Axial DO-41 package; same electrical specs but higher parasitic inductance and no hermetic seal | Limited to commercial-grade, non-military, lower-reliability PCBs with axial mounting capability | Select when cost sensitivity outweighs hermeticity and thermal performance needs |
| SMF20A | Surface-mount SOD-123 package; 20 V unidirectional TVS; 1.5 kW peak pulse power; not a precision Zener | Transient suppression only-not suitable for DC regulation due to higher leakage and wider VBR tolerance | Choose only for overvoltage clamping, not voltage reference or regulation functions |
Compared with 1N3027B-1 and SMF20A, the 1N3027BUR-1/TR delivers superior long-term stability via hermetic sealing, tighter thermal resistance control, and MIL-qualified variants-making it the sole choice where regulation accuracy, radiation tolerance, and 175 °C operation are mandatory.
Availability
1N3027BUR-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, downhole sensor reference, and military radio transceiver bias requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N3027BUR-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 aerospace-grade components.
The 1N3027BUR-1/TR belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered for precision voltage regulation in mission-critical systems where parameter stability, hermeticity, and extreme environmental survivability are non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N3027BUR-1/TR?
The 1N3027BUR-1/TR carries a 'B' suffix indicating ±5% Zener voltage tolerance at 20 V nominal. This is confirmed in the part nomenclature section of T4-LDS-0285-1 Rev. 1 and verified in the Electrical Characteristics table on page 3, where VZ = 20 V @ IZT = 12.5 mA with tolerance explicitly labeled as B-grade. The 1N3027BUR-1/TR does not offer tighter 2% or 1% tolerances in this specific variant.
Is 1N3027BUR-1/TR RoHS compliant?
Yes, the 1N3027BUR-1/TR is available in RoHS-compliant versions marked with the 'e3' suffix (e.g., 1N3027BUR-1 e3), as stated in the Part Nomenclature section of the datasheet. RoHS compliance applies only to commercial-grade units; JAN/JANTX/JANTXV qualified versions retain leaded terminations per MIL-PRF-19500/115 requirements.
What is the maximum reverse leakage current for 1N3027BUR-1/TR at 25 °C?
The maximum reverse leakage current for 1N3027BUR-1/TR is 0.25 µA at VR = 15.2 V and 25 °C, as specified in the Electrical Characteristics table (page 3). This value is consistent across all units in the 1N3016BUR-1 through 1N3045BUR-1 series and reflects the tight control enabled by hermetic glass construction and metallurgical bonding.
Can 1N3027BUR-1/TR be used in place of 1N3027B-1 in existing designs?
Direct substitution of 1N3027BUR-1/TR for 1N3027B-1 requires PCB layout revision due to package change: DO-213AB (MELF) vs. DO-41 (axial). While electrical parameters match, the 1N3027BUR-1/TR offers superior thermal resistance (50 °C/W vs. ~70–80 °C/W), hermeticity, and MIL qualification options-justifying redesign where reliability or environment demands it.
Does 1N3027BUR-1/TR have radiation hardness certification?
Yes, the 1N3027BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, which documents its tolerance to total ionizing dose (TID) without requiring additional screening. This characteristic stems from its hermetically sealed glass construction and metallurgically bonded junction-making it suitable for satellite payload and nuclear instrumentation applications without supplemental rad-hard qualification.
1N3027BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 15.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3027BUR-1/TR FAQ
1.How can I place an order for 1N3027BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3027BUR-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 1N3027BUR-1/TR reliable?
The price and inventory of 1N3027BUR-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 1N3027BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3027BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3027BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3027BUR-1/TR?
1N3027BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3027BUR-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 1N3027BUR-1/TR?
For technical support, including 1N3027BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3027BUR-1/TR requirements.
6.How does Aetrix verify that 1N3027BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3027BUR-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 1N3027BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3027BUR-1/TR?
All 1N3027BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3027BUR-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 1N3027BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3027BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3027BUR-1/TR Tags
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