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Microchip Technology 1N3035BUR-1/TR
- Part No.:
- 1N3035BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3035BUR-1/TR.pdf
- Description:
- DIODE ZENER 43V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,556
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Product details
Overview
1N3035BUR-1 from Microsemi is a hermetically sealed, surface-mount MELF (DO-213AB) Zener diode with nominal Zener voltage 43 V, 6.0 mA test current (IZT), 70 mA maximum Zener current (IZM), 10 µA reverse leakage at 31 V, and ±5% voltage tolerance. It delivers stable voltage regulation in high-density, high-reliability power supply and reference circuits across industrial and aerospace systems.
For engineers reviewing the 1N3035BUR-1 datasheet, 1N3035BUR-1 pinout, 1N3035BUR-1 application, or 1N3035BUR-1 equivalent, key selection criteria include its 43 V Zener voltage at 6.0 mA, 1 W DC power dissipation, DO-213AB package compatibility with automated SMT placement, and JAN/JANTXV qualification readiness for mission-critical environments.
Technical Context
This Zener diode operates in reverse breakdown to maintain precise voltage regulation over wide temperature (–55 °C to +175 °C) and current ranges. Its metallurgically bonded glass construction ensures low thermal resistance (RθJEC = 50 °C/W) and radiation hardness per MicroNote 050.
It exhibits 32.7 Ω dynamic impedance (ZZT) at IZT and 10 µA reverse leakage (IR) at VR = 31 V - critical for low-noise reference stability. The cathode band marking and axial polarity (banded end positive during regulation) define unambiguous PCB orientation and biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V at 6.0 mA - sets regulated output level for precision references and overvoltage clamping. |
| Power Dissipation | 1.0 W - supports continuous regulation in compact SMT layouts without forced cooling. |
| Reverse Leakage (IR) | 10 µA at 31 V - ensures minimal error current in high-impedance feedback networks. |
| Dynamic Impedance (ZZT) | 32.7 Ω at IZT - determines regulation sensitivity to load transients and ripple rejection. |
| Junction Temperature Range | –55 °C to +175 °C - enables operation in extended-temperature avionics and downhole electronics. |
| Voltage Tolerance | ±5% - balances cost and accuracy for non-critical regulation where tight tolerances are not required. |
| Package | DO-213AB (MELF/LL41) - provides low parasitic inductance/capacitance and high thermal reliability for RF and power stages. |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical, leadless, hermetically sealed, cathode band marked on one end. Dimensions: BD = 2.39–2.67 mm, BL = 4.80–5.21 mm, ECT = 0.36–0.56 mm. Weight ≈ 0.05 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of reverse-biased Zener | Connected to higher potential during regulation; defines polarity for correct biasing and PCB orientation. |
| Anode (unbanded end) | Cathode of reverse-biased Zener | Connected to lower potential (e.g., ground or return); completes regulation path with controlled current sink. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments (e.g., space, military). |
| Metallurgically bonded junction | Reduces thermal resistance (50 °C/W) and improves power cycling endurance vs. epoxy-packaged alternatives. |
| Non-ESD-sensitive design | Enables handling without special ESD controls-reduces manufacturing overhead in high-volume SMT lines. |
| Radiation-hardened per MicroNote 050 | Validated for total ionizing dose (TID) resilience in satellite and nuclear instrumentation applications. |
| JAN/JANTXV qualification option | Supports MIL-PRF-19500/115 compliance for defense and aerospace programs requiring traceable reliability data. |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener reference providing fixed 43 V threshold for optocoupler-driven error amplifier. Use Value: Maintains ±1% output accuracy over –40 °C to +105 °C ambient with <10 µA leakage limiting gain error. |
Use Scenario: Overvoltage protection on 28 V aircraft bus monitoring circuitry. IC Role / Device Role / Timing Role: Clamping transient spikes above 43 V to protect downstream ADC inputs and microcontroller I/O. Use Value: Fast response (<10 ns) and low dynamic impedance (32.7 Ω) limit clamp voltage overshoot to <45 V under 1 A surge. |
| Downhole Instrumentation Bias | Test Equipment Calibration Standard |
Use Scenario: Generating stable bias voltage for high-temperature pressure sensor signal conditioning. IC Role / Device Role / Timing Role: Primary voltage reference in 175 °C-rated analog front-end, operating near max junction temperature. Use Value: Guaranteed operation up to +175 °C with <0.1%/°C tempco ensures <±2% drift over full range. |
Use Scenario: Fixed reference in portable multimeter auto-ranging circuitry. IC Role / Device Role / Timing Role: Precision shunt regulator establishing 43 V calibration point for 100 V range scaling. Use Value: ±5% tolerance and low IR enable repeatable 4-digit accuracy without trimming in production calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 43 V, ±5%, 1 W, DO-41 package - larger footprint, higher thermal resistance (65 °C/W), no military qualification. | Suitable for commercial-grade bench power supplies but not high-reliability or high-density layouts. | Select when cost is primary and MIL-spec or MELF size constraints do not apply. |
| BZX84-C43 | 43 V, ±5%, 300 mW, SOT-23 - lower power rating, plastic package, no hermetic seal or radiation hardening. | Fits ultra-compact consumer electronics but cannot sustain 1 W continuous dissipation or survive >125 °C ambient. | Choose only for low-power, cost-sensitive applications where environmental robustness is not required. |
Compared with 1N3035BUR-1, the 1N4749A offers identical electrical specs but lacks MELF packaging advantages and military qualification; the BZX84-C43 trades power and reliability for miniaturization - making 1N3035BUR-1 the sole choice for 1 W, high-temp, high-reliability Zener regulation in constrained layouts.
Availability
1N3035BUR-1 is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage clamping, and downhole instrumentation requiring stable component supply, long-lifecycle support, and traceable military-grade sourcing.
Supply support for 1N3035BUR-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 MIL-spec qualification.
The 1N3035BUR-1 belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where hermetic sealing, thermal stability, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage and test current for 1N3035BUR-1?
The 1N3035BUR-1 has a nominal Zener voltage of 43 V measured at a test current (IZT) of 6.0 mA. This value is specified at 25 °C with the junction in thermal equilibrium and is guaranteed across the ±5% tolerance band. The 1N3035BUR-1 maintains this regulation point with low dynamic impedance (32.7 Ω) and minimal temperature-induced drift.
Is 1N3035BUR-1 suitable for high-temperature operation?
Yes, the 1N3035BUR-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 ensure stable performance in downhole tools, engine control units, and avionics where ambient temperatures exceed 125 °C - unlike plastic-packaged Zeners.
Does 1N3035BUR-1 have military qualification options?
Yes, the 1N3035BUR-1 is available in JAN, JANTX, and JANTXV reliability levels per MIL-PRF-19500/115. These versions include enhanced screening, lot traceability, and extended environmental testing. The base 1N3035BUR-1 part number corresponds to the commercial-grade version, but the nomenclature allows direct upgrade to qualified variants via suffix changes (e.g., JANTXV1N3035BUR-1).
What is the reverse leakage current specification for 1N3035BUR-1?
The 1N3035BUR-1 specifies a maximum reverse leakage current (IR) of 10 µA at a reverse voltage (VR) of 31 V and 25 °C. This low leakage ensures minimal loading on high-impedance reference nodes and preserves accuracy in precision feedback circuits - a key advantage over standard plastic Zeners with leakage in the 100 µA range at similar voltages.
What package type does 1N3035BUR-1 use, and why does it matter?
The 1N3035BUR-1 uses the DO-213AB (MELF/LL41) glass package - a cylindrical, leadless, hermetically sealed construction. This matters because it delivers lower parasitic inductance and capacitance than DO-41 or SOT-23 packages, improves thermal transfer, and eliminates moisture-related failures. Its symmetry also supports high-speed automated placement in dense PCB layouts.
1N3035BUR-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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 32.7 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)
1N3035BUR-1/TR FAQ
1.How can I place an order for 1N3035BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3035BUR-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 1N3035BUR-1/TR reliable?
The price and inventory of 1N3035BUR-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 1N3035BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3035BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3035BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3035BUR-1/TR?
1N3035BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3035BUR-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 1N3035BUR-1/TR?
For technical support, including 1N3035BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3035BUR-1/TR requirements.
6.How does Aetrix verify that 1N3035BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3035BUR-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 1N3035BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3035BUR-1/TR?
All 1N3035BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3035BUR-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 1N3035BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3035BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3035BUR-1/TR Tags
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