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Microchip Technology 1N3018BUR-1/TR
- Part No.:
- 1N3018BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3018BUR-1/TR.pdf
- Description:
- DIODE ZENER 8.2V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N3018BUR-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 8.2 V at 31 mA test current, dynamic impedance 4.5 Ω at IZT, and reverse leakage ≤0.5 µA at 6.2 V - used for precision voltage regulation in high-reliability aerospace and industrial power supplies.
For engineers reviewing the 1N3018BUR-1/TR datasheet, 1N3018BUR-1/TR pinout, 1N3018BUR-1/TR application, or 1N3018BUR-1/TR equivalent, key selection criteria include Zener voltage tolerance (±5%), junction temperature range (–55°C to +175°C), thermal resistance (50°C/W), low-leakage performance, and MIL-PRF-19500/115 qualification level compatibility.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with sharp knee characteristics confirmed by dual-point Zener impedance measurement per MicroNote 202. Its metallurgically enhanced internal contact design ensures stable regulation across –55°C to +175°C and supports high-reliability operation without ESD sensitivity.
The DO-213AB glass MELF package provides hermetic sealing and low parasitic capacitance, enabling use in high-density layouts where axial-leaded DO-41 variants are unsuitable. Axial coefficient of expansion (+6 ppm/°C) requires matched PCB substrate selection to avoid mechanical stress during thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.2 V at 31 mA - defines precise regulation point under standard test conditions |
| Power Dissipation PD | 1.0 W - maximum continuous DC power at end-cap temperature ≤125°C, derated linearly to zero at 175°C |
| Zener Impedance ZZT | 4.5 Ω at IZT - indicates low AC impedance near regulation knee for stable output under varying load |
| Reverse Leakage IR | ≤0.5 µA at VR = 6.2 V - ensures minimal quiescent current loss in standby or low-power modes |
| Junction Temp Range | –55°C to +175°C - enables deployment in extended-temperature military and downhole industrial environments |
| Thermal Resistance RθJEC | 50°C/W - quantifies junction-to-end-cap thermal path; critical for thermal design when mounted on heatsinked pads |
| Forward Voltage VF | 1.2 V at 200 mA - defines forward conduction threshold; relevant for polarity protection or clamping configurations |
Pinout & Package
DO-213AB (MELF/LL41) glass hermetic package: cylindrical body with cathode band marking; terminals are unmarked anode and banded cathode; solderable per MIL-STD-750 Method 2026; weight ≈0.05 g; pad layout A=7.00 mm, B=1.8 mm, C=2.8 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; Zener breakdown occurs with cathode positive relative to anode |
| Anode (unbanded end) | Reference return node | Typically tied to system ground or lower-voltage rail; completes regulation current path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Prevents moisture ingress and long-term parameter drift in harsh environments |
| Metallurgically bonded construction | Reduces thermal resistance and improves reliability over wire-bonded alternatives |
| JAN/JANTX/JANTXV qualification | Meets MIL-PRF-19500/115 requirements for defense and space-grade applications |
| Low reverse leakage (≤0.5 µA) | Minimizes standby power loss in battery-backed or energy-sensitive systems |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for satellite and nuclear instrumentation |
Applications
| Avionics Power Regulation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing reference voltage for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 8.2 V bias for ADC front-end circuitry. Use Value: Maintains ±0.41 V regulation window (±5% tolerance) across –55°C to +125°C, ensuring consistent conversion accuracy. |
Use Scenario: Providing regulated excitation voltage for strain-gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Low-drift Zener reference source for ratiometric sensor excitation. Use Value: ≤0.5 µA leakage prevents loading error in high-impedance bridge networks; hermetic seal resists humidity-induced drift. |
| Military Communications RF Biasing | Downhole Oilfield Electronics |
Use Scenario: Setting bias points for GaAs FET amplifiers in secure tactical radios operating across wide temperature ranges. IC Role / Device Role / Timing Role: Temperature-stable Zener element in active bias network for RF power stages. Use Value: 0.070%/°C tempco and 50°C/W thermal resistance enable predictable bias shift compensation up to +175°C junction. |
Use Scenario: Voltage clamping and transient suppression in logging-while-drilling (LWD) tools exposed to >150°C ambient and vibration. IC Role / Device Role / Timing Role: High-reliability Zener clamp protecting analog front-end ICs from supply surges. Use Value: JANTXV qualification and radiation hardness ensure functional integrity in neutron-rich borehole environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3018B-1 | Same Zener voltage (8.2 V), but DO-41 axial-leaded package; no MIL-PRF-19500 qualification; higher thermal resistance (~70°C/W) | Suitable only for commercial PCB through-hole assembly; not rated for high-vibration or hermetic environments | Select when cost-sensitive prototyping or legacy through-hole designs require identical electrical specs without surface-mount constraints |
| SMF8.2A | Surface-mount SOD-123 package; 8.2 V nominal; 1.0 W rating; ±5% tolerance; RoHS-compliant; no military qualification; higher leakage (≤5 µA @ 6.6 V) | Designed for commercial automotive and consumer electronics; lacks radiation hardness and hermetic seal | Choose for high-volume automated assembly where MIL-spec compliance and extreme environmental resilience are not required |
Compared with 1N3018BUR-1/TR, the 1N3018B-1 offers identical regulation but sacrifices surface-mount capability and reliability grading, while SMF8.2A enables compact layout and RoHS compliance at the expense of hermeticity, radiation tolerance, and leakage performance - making 1N3018BUR-1/TR irreplaceable in mission-critical aerospace and defense systems.
Availability
1N3018BUR-1/TR is available at Aetrix Electronics and suitable for avionics power regulation, industrial sensor signal conditioning, military communications RF biasing, and downhole oilfield electronics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N3018BUR-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 military-qualified components for aerospace, defense, and industrial markets.
The 1N3018BUR-1/TR belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered for voltage regulation in mission-critical systems where parameter stability, hermetic integrity, and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3018BUR-1/TR?
The 1N3018BUR-1/TR has a nominal Zener voltage of 8.2 V with a ±5% tolerance, corresponding to the "B" suffix in its nomenclature. This means the actual measured VZ at 31 mA test current falls between 7.79 V and 8.61 V across the qualified temperature range, verified per MIL-PRF-19500/115 test protocols.
Is 1N3018BUR-1/TR suitable for high-temperature applications?
Yes, the 1N3018BUR-1/TR is rated for junction temperatures from –55°C to +175°C and features a thermal resistance of 50°C/W. It maintains regulation stability up to 175°C when properly mounted on thermally optimized pads, making it appropriate for downhole, engine-control, and avionics applications where ambient temperatures exceed 125°C.
Does 1N3018BUR-1/TR have military qualification?
Yes, the "UR" in 1N3018BUR-1/TR denotes the surface-mount MELF package, and the part is available in JAN, JANTX, and JANTXV reliability levels per MIL-PRF-19500/115. The specific qualification level depends on ordering suffix (e.g., 1N3018BUR-1TRJANTXV), and all versions share the same electrical and mechanical specifications.
What is the maximum reverse leakage current for 1N3018BUR-1/TR?
The maximum reverse leakage current for 1N3018BUR-1/TR is 0.5 µA at VR = 6.2 V and 25°C, as specified in the Electrical Characteristics table. This ultra-low leakage ensures minimal power loss in high-impedance reference circuits and contributes to long-term stability in battery-powered or energy-harvesting systems.
Can 1N3018BUR-1/TR be used in RoHS-compliant designs?
RoHS-compliant versions of 1N3018BUR-1/TR are available for commercial-grade units only, marked with the "e3" suffix (e.g., 1N3018BUR-1 e3). Military-qualified versions (JAN/JANTX/JANTXV) retain leaded terminations per MIL-PRF-19500/115 requirements and are not RoHS compliant.
1N3018BUR-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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 4.5 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 6.2 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)
1N3018BUR-1/TR FAQ
1.How can I place an order for 1N3018BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3018BUR-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 1N3018BUR-1/TR reliable?
The price and inventory of 1N3018BUR-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 1N3018BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3018BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3018BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3018BUR-1/TR?
1N3018BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3018BUR-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 1N3018BUR-1/TR?
For technical support, including 1N3018BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3018BUR-1/TR requirements.
6.How does Aetrix verify that 1N3018BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3018BUR-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 1N3018BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3018BUR-1/TR?
All 1N3018BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3018BUR-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 1N3018BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3018BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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