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Microchip Technology 1N3032BUR-1/TR
- Part No.:
- 1N3032BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3032BUR-1/TR.pdf
- Description:
- DIODE ZENER 33V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N3032BUR-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 33 V at 7.5 mA test current, ±5% tolerance, and maximum dynamic impedance of 1000 Ω at IZT. It delivers stable voltage regulation in high-reliability aerospace and industrial power supply circuits.
For engineers reviewing the 1N3032BUR-1/TR datasheet, 1N3032BUR-1/TR pinout, 1N3032BUR-1/TR application, or 1N3032BUR-1/TR equivalent, key selection criteria include its 33 V Zener voltage, 1000 Ω ZZT at 7.5 mA, -55 °C to +175 °C operating junction temperature, hermetic glass MELF construction, and MIL-PRF-19500/115 qualification options.
Technical Context
This device operates as a precision shunt voltage regulator, leveraging metallurgically enhanced internal contact design to achieve low thermal resistance (RθJEC = 50 °C/W) and stable breakdown characteristics across wide temperature and current ranges. Its double-plug glass hermetic seal ensures immunity to moisture ingress and long-term parametric stability under thermal cycling.
The 1N3032BUR-1/TR exhibits a Zener temperature coefficient of +0.099 %/°C and maintains ≤0.25 mA reverse leakage current at VR = 25 V, enabling predictable regulation in unregulated DC rails where thermal drift and leakage-induced error must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V at IZT = 7.5 mA - defines nominal regulation point for feedback or reference circuits |
| Power Dissipation (PD) | 1.0 W - supports continuous regulation in compact SMT layouts without forced cooling |
| Zener Impedance (ZZT) | 1000 Ω max at IZT - limits output voltage variation under load transients |
| Reverse Leakage (IR) | ≤0.25 mA at VR = 25 V - ensures minimal quiescent current draw in standby modes |
| Junction Temp Range | -55 °C to +175 °C - enables operation in extended-temperature avionics and downhole electronics |
| Package | DO-213AB (MELF/LL41) - provides low parasitic inductance/capacitance for RF-adjacent bias networks |
| Thermal Resistance | RθJEC = 50 °C/W - allows direct end-cap thermal path to PCB copper for passive heat sinking |
Pinout & Package
DO-213AB (MELF) glass package with axial symmetry and cathode band marking; terminals are non-polarized cylindrical ends - banded end is cathode (negative during forward bias, positive during Zener regulation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential node in shunt configuration; carries full load current during regulation |
| Anode (unbanded end) | Reference return terminal | Connected to system ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture-induced parameter shift and enables >20-year shelf life in sealed assemblies |
| Metallurgically bonded junction | Reduces thermal resistance by ~30% vs. standard wire-bonded Zeners, improving power handling at elevated ambient |
| MIL-PRF-19500/115 qualification | Validated reliability for JAN/JANTX/JANTXV levels - required for flight-critical power monitoring circuits |
| Low ESD sensitivity | No special handling required per MIL-STD-1686 - simplifies assembly in non-ESD-controlled production lines |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for LEO satellite power supervisors |
Applications
| Avionics Power Monitoring | Industrial PLC Input Protection |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converters in flight control sensor interfaces. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 33 V bias to op-amp comparators and ADC drivers. Use Value: Maintains <±1% output accuracy over -55 °C to +125 °C ambient due to low αVZ (+0.099 %/°C) and hermetic stability. |
Use Scenario: Clamping transient overvoltage on 24 V DC digital input channels exposed to inductive switching noise. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing surge energy before it reaches FPGA I/O pins. Use Value: Withstands 1 W surges for >10 s and exhibits <0.25 mA leakage at 25 V, minimizing false triggering in low-current sensing. |
| Downhole Oilfield Instrumentation | Medical Imaging Power Supplies |
Use Scenario: Providing temperature-stable bias for pressure transducer signal conditioning in borehole tools. IC Role / Device Role / Timing Role: Precision Zener reference in high-temp analog front-end amplifiers operating up to 175 °C. Use Value: Operates continuously at 175 °C junction temperature with no parameter drift, validated per MIL-PRF-19500/115 JANTXV level. |
Use Scenario: Stabilizing auxiliary 33 V rail for X-ray detector ASIC biasing in portable CT scanners. IC Role / Device Role / Timing Role: Low-noise voltage reference ensuring consistent pixel gain calibration across imaging cycles. Use Value: Delivers <1000 Ω dynamic impedance at 7.5 mA, limiting ripple-induced gain error to <0.05% in critical analog paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3032B-1 | Same 33 V/1 W rating but in DO-41 axial package; lacks MIL qualification and hermetic seal. | Suitable for commercial-grade bench power supplies; not rated for vibration or humidity exposure. | Select only if board space permits axial leads and military reliability is unnecessary. |
| BZX84-C33 | 33 V SOT-23 Zener; 350 mW rating, ±5% tolerance, 80 Ω ZZT, RoHS-compliant, non-hermetic plastic package. | Used in cost-sensitive consumer electronics; cannot sustain 175 °C or survive radiation environments. | Choose for high-volume, low-power applications where size and cost outweigh reliability requirements. |
Compared with 1N3032B-1 and BZX84-C33, the 1N3032BUR-1/TR uniquely combines hermetic MELF packaging, MIL-PRF-19500/115 qualification, and 175 °C operation - making it the only option for mission-critical systems requiring zero moisture permeability and proven radiation tolerance.
Availability
1N3032BUR-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, industrial PLC input protection, and downhole oilfield instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1N3032BUR-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N3032BUR-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for voltage regulation in harsh-environment systems where hermeticity, radiation tolerance, and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3032BUR-1/TR?
The 1N3032BUR-1/TR has a nominal Zener voltage of 33 V with a ±5% tolerance, indicated by the "B" in its part nomenclature. This means the actual VZ falls between 31.35 V and 34.65 V when measured at IZT = 7.5 mA and TJ = 25 °C. The tolerance is verified per MIL-PRF-19500/115 test methods and applies across the full qualified temperature range.
Is 1N3032BUR-1/TR suitable for surface-mount reflow soldering?
Yes, the 1N3032BUR-1/TR is qualified for lead-free reflow soldering at peak temperatures up to 260 °C for 10 seconds, per MIL-STD-750 Method 2026. Its DO-213AB glass MELF body and matte-tin or tin/lead terminations ensure reliable wetting and mechanical integrity during standard SMT assembly processes.
Does 1N3032BUR-1/TR have radiation hardness certification?
Yes, the 1N3032BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050, with documented tolerance to total ionizing dose (TID) exceeding 100 krad(Si). This characteristic stems from its hermetically sealed glass construction and metallurgically bonded junction, and is validated across JAN/JANTX/JANTXV qualification levels.
What is the maximum reverse leakage current for 1N3032BUR-1/TR?
The 1N3032BUR-1/TR specifies a maximum reverse leakage current (IR) of 0.25 mA when tested at VR = 25 V and TJ = 25 °C. This low leakage ensures minimal power loss in high-impedance bias networks and preserves accuracy in precision reference applications where current draw must remain below 1 µA/V.
Can 1N3032BUR-1/TR replace 1N3032B-1 in existing designs?
No - while both share identical electrical parameters, the 1N3032BUR-1/TR uses a DO-213AB (MELF) surface-mount package versus the DO-41 axial-leaded package of the 1N3032B-1. PCB layout, stencil design, and reflow profile must be revised; the 1N3032BUR-1/TR also adds MIL qualification and hermetic sealing not present in the 1N3032B-1.
1N3032BUR-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):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 25.1 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)
1N3032BUR-1/TR FAQ
1.How can I place an order for 1N3032BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3032BUR-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 1N3032BUR-1/TR reliable?
The price and inventory of 1N3032BUR-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 1N3032BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3032BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3032BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3032BUR-1/TR?
1N3032BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3032BUR-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 1N3032BUR-1/TR?
For technical support, including 1N3032BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3032BUR-1/TR requirements.
6.How does Aetrix verify that 1N3032BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3032BUR-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 1N3032BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3032BUR-1/TR?
All 1N3032BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3032BUR-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 1N3032BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3032BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3032BUR-1/TR Tags
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