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Microchip Technology 1N3031BUR-1/TR
- Part No.:
- 1N3031BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3031BUR-1/TR.pdf
- Description:
- DIODE ZENER 30V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,705
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Product details
Overview
1N3031BUR-1 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 30 V at 8.5 mA test current, dynamic impedance 40 Ω at IZT, and maximum reverse leakage current 0.25 µA at 22.8 V. It serves as a precision voltage reference or shunt regulator in high-reliability aerospace, defense, and industrial power conditioning circuits.
For engineers reviewing the 1N3031BUR-1 datasheet, 1N3031BUR-1 pinout, 1N3031BUR-1 application, or 1N3031BUR-1 equivalent, key selection criteria include its MIL-PRF-19500/115 qualification (JAN/JANTX/JANTXV options), ±5% voltage tolerance, -55 °C to +175 °C operating junction temperature, 50 °C/W thermal resistance, and radiation-hardened construction per MicroNote 050.
Technical Context
This device operates as a shunt-regulating Zener diode with sharp breakdown knee (IZK = 8.5 mA), defined Zener impedance (ZZT = 40 Ω at IZT), and low temperature coefficient (αVZ = 0.098 %/°C). Its double-plug glass hermetic seal and metallurgically enhanced internal contact ensure stable regulation across wide temperature and current ranges.
Designed for high-density PCB layouts, it replaces axial DO-41 variants (e.g., 1N3031B-1) while maintaining JEDEC-compatible electrical behavior. The DO-213AB package enables automated SMT placement and delivers lower parasitic inductance than leaded alternatives, critical for noise-sensitive analog and power-supply feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 30 V nominal at 8.5 mA - defines precise regulation point for feedback loops and reference generation |
| Power Dissipation PD | 1.0 W - supports continuous operation up to 8.5 mA at 30 V without derating below 125 °C |
| Zener Impedance ZZT | 40 Ω at IZT - ensures minimal output voltage variation under load transients in regulation applications |
| Reverse Leakage IR | 0.25 µA at 22.8 V - guarantees negligible error current in high-impedance reference nodes |
| Junction Temp Range | -55 °C to +175 °C - enables deployment in extended-temperature avionics and downhole electronics |
| Thermal Resistance RθJEC | 50 °C/W - allows direct thermal coupling to end-cap heatsinking for sustained 1 W operation |
| Forward Voltage VF | 1.2 V at 200 mA - confirms low-loss forward conduction for protection or clamping use cases |
Pinout & Package
DO-213AB (MELF/LL41) glass hermetic package: cylindrical body with cathode band marking; no leads; solderable copper-clad steel terminals with tin/lead or RoHS-compliant matte-tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of Zener breakdown path | Connected to regulated voltage node; must be held positive relative to anode for Zener operation |
| Anode (unbanded end) | Cathode of Zener breakdown path | Connected to circuit ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| Metallurgically bonded junction | Reduces thermal resistance and improves reliability under thermal cycling stress |
| MIL-PRF-19500/115 qualification | Validated performance for JAN, JANTX, and JANTXV military-grade applications |
| Radiation hardness | Inherent tolerance to total ionizing dose (TID), per MicroNote 050, suitable for space systems |
| ESD insensitivity | No special handling required-robust against human-body-model discharges up to ±15 kV |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Regulation |
|---|---|
Use Scenario: Monitoring 28 V DC bus voltage in flight control computers using resistive divider + comparator. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 30 V threshold for overvoltage detection. Use Value: Enables ±1% trip-point accuracy over -55 °C to +125 °C due to low αVZ and hermetic stability. |
Use Scenario: Regulating secondary supply rails in LEO satellite power distribution units. IC Role / Device Role / Timing Role: Shunt regulator maintaining 30 V reference for ADC biasing and telemetry scaling. Use Value: Radiation-hardened construction ensures >100 krad(Si) TID tolerance without parameter shift. |
| Downhole Oilfield Instrumentation | Tactical Radio RF Stage Biasing |
Use Scenario: Providing stable bias for pressure sensor signal conditioning in drill-string telemetry modules. IC Role / Device Role / Timing Role: High-temperature Zener reference enabling accurate 4–20 mA loop calibration at 175 °C. Use Value: Continuous operation at 175 °C junction temperature supported by 50 °C/W RθJEC and glass seal integrity. |
Use Scenario: Setting gate bias for GaN HEMT drivers in portable HF/VHF transceivers. IC Role / Device Role / Timing Role: Low-noise voltage clamp protecting amplifier input stages during transmit/receive switching. Use Value: 40 Ω dynamic impedance minimizes RF-induced voltage perturbation on bias nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3031B-1 | Same electrical specs but DO-41 axial-leaded package; no MIL qualification; higher parasitic inductance | Preferred for prototyping or low-frequency lab supplies where SMT not required | Select when board space is unconstrained and manual assembly is acceptable |
| SMF30A | Surface-mount TVS diode (not Zener); 30 V standoff, 48.4 V clamping; unidirectional; 200 W peak power | Used for transient suppression-not precision regulation-due to soft breakdown and higher leakage | Choose only for surge protection; not interchangeable for voltage reference or shunt regulation |
Compared with 1N3031B-1 and SMF30A, the 1N3031BUR-1 uniquely combines MIL-qualified reliability, MELF SMT compatibility, and tight Zener regulation-making it irreplaceable in mission-critical voltage reference roles where stability, radiation tolerance, and thermal robustness are non-negotiable.
Availability
1N3031BUR-1 is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage regulation, and downhole instrumentation requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N3031BUR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, emphasizing radiation tolerance, extended temperature operation, and military qualification.
The 1N30xxBUR-1 series was developed to deliver JEDEC-standard Zener performance in hermetic MELF packaging for high-density, high-reliability power regulation and voltage reference applications in mission-critical systems.
FAQ
What is the Zener voltage tolerance for 1N3031BUR-1?
The 1N3031BUR-1 has a nominal Zener voltage of 30 V with a standard tolerance of ±5%, denoted by the "B" suffix in its nomenclature. This tolerance is verified per MIL-PRF-19500/115 test requirements and applies across the full operating temperature range of -55 °C to +175 °C.
Is 1N3031BUR-1 suitable for space applications?
Yes, the 1N3031BUR-1 is inherently radiation-hardened per Microsemi MicroNote 050 and qualified to MIL-PRF-19500/115 at JANTXV level, making it suitable for low-earth orbit (LEO) satellite bus regulation and telemetry reference functions where total ionizing dose (TID) resilience is required.
What is the maximum continuous reverse current for 1N3031BUR-1 before breakdown?
The maximum reverse leakage current (IR) for 1N3031BUR-1 is 0.25 µA when biased at 22.8 V (0.76 × VZ), measured at 25 °C. At higher temperatures or voltages approaching VZ, leakage remains well below 1 µA, supporting high-impedance reference node integrity.
Can 1N3031BUR-1 be used in reflow soldering processes?
Yes, the 1N3031BUR-1 is rated for solder temperature of 260 °C for 10 seconds and complies with IPC/JEDEC J-STD-020 moisture sensitivity level 1, making it fully compatible with standard lead-free reflow profiles used in high-reliability SMT assembly lines.
How does the DO-213AB package of 1N3031BUR-1 improve performance over DO-41?
The DO-213AB (MELF) package of 1N3031BUR-1 reduces parasitic inductance and capacitance versus DO-41, improves thermal coupling via end-cap conduction (RθJEC = 50 °C/W), and enables automated high-density placement-critical for noise-sensitive regulation in RF and precision analog systems.
1N3031BUR-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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 22.8 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)
1N3031BUR-1/TR FAQ
1.How can I place an order for 1N3031BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3031BUR-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 1N3031BUR-1/TR reliable?
The price and inventory of 1N3031BUR-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 1N3031BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3031BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3031BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3031BUR-1/TR?
1N3031BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3031BUR-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 1N3031BUR-1/TR?
For technical support, including 1N3031BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3031BUR-1/TR requirements.
6.How does Aetrix verify that 1N3031BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3031BUR-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 1N3031BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3031BUR-1/TR?
All 1N3031BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3031BUR-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 1N3031BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3031BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3031BUR-1/TR Tags
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