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Microchip Technology 1N3034BUR-1/TR
- Part No.:
- 1N3034BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3034BUR-1/TR.pdf
- Description:
- DIODE ZENER 39V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,505
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Product details
Overview
1N3034BUR-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 39 V at 6.5 mA test current, dynamic impedance 1000 Ω at IZT, and maximum reverse leakage current 0.25 µA at 31 V. It serves voltage regulation in high-reliability aerospace, defense, and industrial power supply circuits.
For engineers reviewing the 1N3034BUR-1 datasheet, 1N3034BUR-1 pinout, 1N3034BUR-1 application, or 1N3034BUR-1 equivalent, key selection criteria include its ±5% Zener tolerance (B suffix), -55 °C to +175 °C operating junction temperature range, 50 °C/W junction-to-end-cap thermal resistance, and MIL-PRF-19500/115 qualification options (JAN/JANTX/JANTXV).
Technical Context
This device operates as a precision shunt voltage regulator in breakdown mode, with Zener voltage specified at 39 V ±5% under 6.5 mA DC test current (IZT). Its metallurgically enhanced internal construction ensures low thermal resistance and stable regulation across wide temperature extremes.
The DO-213AB glass MELF package provides hermetic sealing, zero lead inductance, and low parasitic capacitance - critical for noise-sensitive analog references and high-density PCB layouts where axial-leaded alternatives are unsuitable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% at 6.5 mA - defines precise regulation point for feedback networks in DC-DC converters and reference supplies. |
| Power Dissipation (PD) | 1.0 W - supports continuous regulation up to ~25.6 mA at 39 V before thermal derating begins at 125 °C. |
| Zener Impedance (ZZT) | 1000 Ω at IZT - indicates moderate AC impedance; suitable for moderate-precision regulation but not ultra-low-noise references. |
| Reverse Leakage (IR) | 0.25 µA max at 31 V - ensures minimal quiescent current draw in standby or battery-backed circuits. |
| Junction Temp Range | -55 °C to +175 °C - enables operation in extended-temperature military, downhole, and avionics environments. |
| Thermal Resistance (RθJEC) | 50 °C/W - allows direct thermal coupling to PCB copper or heatsinking end caps for sustained 1 W operation. |
Pinout & Package
DO-213AB (MELF/LL41) glass hermetic package: cylindrical body with cathode band marking; axial symmetry requires orientation-independent mounting; no discrete pins - terminals are metallized end caps soldered directly to PCB pads per recommended layout (A = 7.0 mm pad length, B = 1.8 mm width, C = 2.8 mm spacing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End (banded) | Anode of Zener diode in forward bias; cathode in reverse breakdown | Must be held at higher potential than anode to enable Zener conduction; polarity critical for regulation function. |
| Anode End (unbanded) | Cathode of Zener diode in forward bias; anode in reverse breakdown | Connected to regulated output node or ground reference; forms shunt path for excess current. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift - essential for 20+ year field reliability in space-grade systems. |
| Metallurgically bonded junction | Reduces thermal resistance by ~30% vs. standard wire-bonded Zeners, improving power handling and transient thermal response. |
| MIL-PRF-19500/115 qualification | Available in JAN/JANTX/JANTXV levels - meets screening, testing, and traceability requirements for Class H and Class K military applications. |
| ESD insensitivity | No special handling required - withstands >4 kV HBM without degradation, simplifying assembly and field service. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - validated for use in low-earth orbit and nuclear instrumentation. |
Applications
| Avionics Power Conditioning | Downhole Sensor Reference |
|---|---|
Use Scenario: Regulating auxiliary 39 V rail in flight control actuator power modules exposed to -55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amps and ADC drivers. Use Value: Hermetic seal prevents condensation-induced leakage shift; 175 °C max junction rating accommodates localized heating near motor drivers. |
Use Scenario: Precision voltage clamp in high-temperature pressure transducer signal conditioning circuit operating at 150 °C downhole. IC Role / Device Role / Timing Role: Overvoltage protection and reference stabilization for bridge amplifier excitation. Use Value: Metallurgically bonded construction maintains Zener voltage stability within ±0.1%/°C over full temp range; no parametric drift after 1000 hr life test. |
| Defense Radar Bias Supply | Nuclear Instrumentation Reference |
Use Scenario: Stabilizing gate bias voltage for GaN RF power amplifiers in pulsed radar transmitters. IC Role / Device Role / Timing Role: Fast-response shunt regulator absorbing switching transients during pulse-on events. Use Value: Low parasitic capacitance (<0.8 pF) avoids RF detuning; radiation hardness prevents latch-up during neutron flux exposure. |
Use Scenario: Primary voltage reference in gamma spectroscopy front-end electronics requiring decades-long calibration stability. IC Role / Device Role / Timing Role: Low-drift Zener element in compensated reference ladder network. Use Value: <0.25 µA reverse leakage ensures sub-picoamp input bias error in charge-sensitive amplifiers; hermeticity prevents aging-related VZ drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3034UR-1 (Microchip) | Same 39 V ±5%, DO-213AB package, but commercial-grade only; no MIL-PRF-19500 qualification; RoHS-compliant matte-tin finish. | Lacks JAN/JANTXV screening - suitable for non-military industrial controls but not flight-critical systems. | Select when cost sensitivity outweighs radiation hardness or extended-temperature validation needs. |
| BZX84-C39 (Diodes Inc.) | SOT-23 package; 39 V ±5%; 300 mW rating; 150 Ω ZZT; -65 °C to +150 °C range; no hermetic seal. | Lower power and temperature capability; higher leakage (>1 µA); unsuitable for high-reliability or high-temp environments. | Use only in consumer-grade, low-cost, space-constrained designs where long-term stability is secondary. |
Compared with 1N3034BUR-1, the 1N3034UR-1 offers identical electrical specs in a lower-cost commercial variant, while the BZX84-C39 trades hermetic reliability and thermal robustness for small-outline convenience - making the 1N3034BUR-1 the sole choice for mission-critical, high-temperature, or radiation-exposed applications.
Availability
1N3034BUR-1 is available at Aetrix Electronics and suitable for avionics power conditioning, downhole sensor reference, defense radar bias supply, and nuclear instrumentation reference requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3034BUR-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, radiation-hardened, and military-qualified components for aerospace, defense, and industrial markets.
The 1N3034BUR-1 belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered specifically for voltage regulation in safety-critical systems where long-term parametric stability, hermetic integrity, and extreme environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3034BUR-1?
The 1N3034BUR-1 has a nominal Zener voltage of 39 V with a ±5% tolerance, indicated by the "B" in its part nomenclature. This means the actual measured VZ at 6.5 mA test current falls between 37.05 V and 40.95 V across the qualified temperature range. The tolerance is guaranteed per MIL-PRF-19500/115 screening for JAN/JANTX/JANTXV versions.
Is 1N3034BUR-1 suitable for high-temperature operation?
Yes, the 1N3034BUR-1 is rated for junction temperatures from -55 °C to +175 °C and features a 50 °C/W thermal resistance (RθJEC). Its hermetic glass MELF package and metallurgically bonded junction enable reliable operation at 150 °C ambient in downhole or engine-mounted electronics - provided PCB copper area and end-cap heatsinking meet Microsemi's recommended pad layout.
Does 1N3034BUR-1 require special ESD handling?
No - the 1N3034BUR-1 is explicitly characterized as non-sensitive to ESD per its datasheet. It withstands >4 kV human-body-model (HBM) stress without parameter shift or failure, eliminating the need for static-dissipative packaging, wrist straps, or ionized workstations during assembly or field replacement.
What does the "UR-1" suffix mean in 1N3034BUR-1?
The "UR-1" suffix denotes Microsemi's surface-mount MELF package (DO-213AB) with metallurgically bonded construction and hermetic glass sealing. "U" = surface-mount MELF, "R" = metallurgically bonded, "-1" = standard JEDEC-compliant Zener series configuration - distinguishing it from axial DO-41 variants like 1N3034B-1.
Can 1N3034BUR-1 be used as a replacement for 1N3034B-1?
No - the 1N3034BUR-1 is not a drop-in replacement for the axial-leaded 1N3034B-1. While both share identical electrical specs (39 V ±5%, 1 W), the 1N3034BUR-1 uses a DO-213AB MELF package requiring different PCB footprint, reflow profile, and mechanical mounting. Substitution requires layout revision and thermal validation.
1N3034BUR-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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 29.7 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)
1N3034BUR-1/TR FAQ
1.How can I place an order for 1N3034BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3034BUR-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 1N3034BUR-1/TR reliable?
The price and inventory of 1N3034BUR-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 1N3034BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3034BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3034BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3034BUR-1/TR?
1N3034BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3034BUR-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 1N3034BUR-1/TR?
For technical support, including 1N3034BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3034BUR-1/TR requirements.
6.How does Aetrix verify that 1N3034BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3034BUR-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 1N3034BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3034BUR-1/TR?
All 1N3034BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3034BUR-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 1N3034BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3034BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3034BUR-1/TR Tags
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