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Microchip Technology 1N3042BUR-1/TR
- Part No.:
- 1N3042BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3042BUR-1/TR.pdf
- Description:
- DIODE ZENER 82V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
1N3042BUR-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 of 82 V at 3.0 mA test current, dynamic impedance of 700 Ω at IZT, and maximum reverse leakage current of 0.25 µA at 66 V. It serves voltage regulation in high-reliability aerospace and industrial power supply rails.
For engineers reviewing the 1N3042BUR-1 datasheet, 1N3042BUR-1 pinout, 1N3042BUR-1 application, or 1N3042BUR-1 equivalent, key selection criteria include its ±5% voltage tolerance (B-grade), -55°C to +175°C junction temperature range, 50°C/W thermal resistance, RoHS-compliant option (e3 suffix), and MIL-PRF-19500/115 qualification availability (JAN/JANTX/JANTXV).
Technical Context
This device operates as a precision voltage reference and shunt regulator in constant-current-biased configurations. Its breakdown behavior is characterized by a sharp knee (IZK = 3.0 mA), low dynamic impedance (ZZT = 700 Ω), and stable temperature coefficient (αVZ = 0.106 %/°C), enabling predictable regulation across wide temperature excursions.
The DO-213AB glass MELF package provides hermetic sealing and low parasitic capacitance (<0.8 pF typical), supporting high-frequency stability and radiation hardness per MicroNote 050. Metallurgical bonding ensures low thermal resistance and enhanced reliability under thermal cycling stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V nominal at 3.0 mA - defines regulated output voltage under standard test bias |
| Power Dissipation (PD) | 1.0 W - maximum continuous DC power at TEC ≤ 125°C before linear derating to zero at 175°C |
| Zener Impedance (ZZT) | 700 Ω at IZT - determines regulation error under load current variation |
| Reverse Leakage (IR) | 0.25 µA at 66 V - ensures minimal quiescent current in standby or high-impedance sensing paths |
| Junction Temp Range | -55°C to +175°C - supports operation in extended-temperature avionics, downhole, and military systems |
| Thermal Resistance | 50°C/W (Junction-to-End Cap) - enables thermal design using end-cap mounting for heat sinking |
| Forward Voltage (VF) | 1.2 V at 200 mA - relevant for polarity verification and forward-bias protection circuit checks |
Pinout & Package
DO-213AB (MELF/LL41) glass hermetic package: cylindrical body with cathode band marking; axial terminals; no leads; solderable matte-tin or SnPb finish per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode connection for Zener regulation | Must be biased positive relative to anode to operate in breakdown; band identifies polarity during placement |
| Anode (unbanded end) | Cathode connection for Zener regulation | Reference node tied to system ground or lower potential; 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 power cycling endurance vs. epoxy-packaged alternatives |
| ±5% Zener voltage tolerance (B-grade) | Enables cost-effective precision regulation without trimming in fixed-voltage reference designs |
| MIL-PRF-19500/115 qualification | Validates reliability for defense, space, and critical infrastructure applications requiring JAN/JANTXV screening |
| Radiation-hardened per MicroNote 050 | Supports operation in total ionizing dose (TID) environments up to 100 krad(Si) without functional degradation |
Applications
| Avionics Power Conditioning | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for ADC front-end circuits in flight control computers exposed to wide thermal swings. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable 82 V bias to precision op-amp gain stages. Use Value: Maintains <±0.5% output stability over -55°C to +125°C due to low αVZ and hermetic packaging. |
Use Scenario: Overvoltage clamping on 4–20 mA current loop inputs subjected to transient surges in factory automation. IC Role / Device Role / Timing Role: Transient voltage suppressor and precision clamp limiting input to 82 V absolute maximum. Use Value: Low leakage (0.25 µA) prevents signal offset errors; fast response protects downstream instrumentation amplifiers. |
| Downhole Oilfield Sensor Biasing | Military Radio RF Stage Bias Supply |
Use Scenario: Generating stable bias for piezoresistive pressure transducers operating at 150°C in drilling tools. IC Role / Device Role / Timing Role: High-temperature Zener reference establishing calibrated excitation voltage. Use Value: Guaranteed operation to +175°C junction temperature with no parameter shift beyond spec limits. |
Use Scenario: Providing regulated 82 V supply to GaN PA bias networks in tactical HF/VHF transceivers. IC Role / Device Role / Timing Role: Primary shunt regulator in compact, high-density RF power supply modules. Use Value: MELF geometry minimizes parasitic inductance/capacitance, preserving RF stability above 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3042UR-1 | Same Zener voltage (82 V), same DO-213AB package, but commercial-grade only (no MIL-PRF-19500 qualification) | Lacks JAN/JANTXV screening; unsuitable for defense/aerospace programs requiring traceable reliability data | Select when cost sensitivity outweighs qualification requirements and environmental stress testing is not mandated |
| BZX85C82 | 82 V Zener, ±5% tolerance, but in DO-41 axial package; higher thermal resistance (100°C/W); non-hermetic epoxy | Not suitable for high-humidity, high-vibration, or radiation-exposed environments; requires through-hole PCB layout | Choose only for legacy board redesigns where surface-mount MELF footprint cannot be accommodated |
Compared with 1N3042UR-1 and BZX85C82, the 1N3042BUR-1 uniquely combines MIL-qualified reliability, hermetic MELF packaging, and 50°C/W thermal resistance-enabling use in mission-critical systems where parameter stability under thermal, mechanical, and radiation stress is non-negotiable.
Availability
1N3042BUR-1 is available at Aetrix Electronics and suitable for avionics power conditioning, industrial PLC analog input protection, and downhole oilfield sensor biasing requiring stable component supply across extended temperature and reliability lifecycles.
Supply support for 1N3042BUR-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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N30xxBUR-1 series was engineered to replace legacy axial Zeners in high-density, high-reliability applications-delivering MIL-qualified performance in surface-mount MELF form with radiation hardness and extended temperature capability.
FAQ
What is the Zener voltage tolerance for 1N3042BUR-1?
The 1N3042BUR-1 has a nominal Zener voltage of 82 V with a ±5% tolerance, indicated by the "B" in the part nomenclature. This means the actual VZ at 3.0 mA test current falls between 77.9 V and 86.1 V across the qualified temperature range, meeting JEDEC registration requirements for the 1N30xx series.
Is 1N3042BUR-1 suitable for high-temperature operation?
Yes, the 1N3042BUR-1 is rated for junction temperatures from -55°C to +175°C and features a thermal resistance of 50°C/W (junction-to-end cap). Its hermetic glass MELF package and metallurgically bonded construction enable reliable operation in downhole, avionics, and engine-control applications where ambient temperatures exceed 125°C.
Does 1N3042BUR-1 meet MIL-PRF-19500 specifications?
Yes, the 1N3042BUR-1 is qualified per MIL-PRF-19500/115 at JAN, JANTX, and JANTXV levels. The "UR" in the part number denotes the surface-mount MELF configuration, and qualification status is confirmed in Microsemi's T4-LDS-0285-1 datasheet revision 1. Commercial versions (no reliability level prefix) are also available.
What is the maximum reverse leakage current for 1N3042BUR-1?
The maximum reverse leakage current (IR) for 1N3042BUR-1 is 0.25 µA measured at VR = 66 V (80% of nominal VZ). This ultra-low leakage ensures minimal loading on high-impedance reference nodes and preserves accuracy in precision analog circuits such as sensor excitation and calibration subsystems.
Can 1N3042BUR-1 be used as a direct replacement for axial 1N3042B-1?
No-while both share identical electrical characteristics and JEDEC type numbering, the 1N3042BUR-1 uses a DO-213AB (MELF) surface-mount package, whereas the 1N3042B-1 is in the DO-41 axial-leaded package. They are functionally equivalent but require different PCB footprints and assembly processes; no mechanical interchangeability exists.
1N3042BUR-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):
- 82 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 62.2 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)
1N3042BUR-1/TR FAQ
1.How can I place an order for 1N3042BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3042BUR-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 1N3042BUR-1/TR reliable?
The price and inventory of 1N3042BUR-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 1N3042BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3042BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3042BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3042BUR-1/TR?
1N3042BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3042BUR-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 1N3042BUR-1/TR?
For technical support, including 1N3042BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3042BUR-1/TR requirements.
6.How does Aetrix verify that 1N3042BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3042BUR-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 1N3042BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3042BUR-1/TR?
All 1N3042BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3042BUR-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 1N3042BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3042BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3042BUR-1/TR Tags
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