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Microchip Technology 1N5259BUR-1/TR
- Part No.:
- 1N5259BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5259BUR-1/TR.pdf
- Description:
- DIODE ZENER 39V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,866
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Product details
Overview
1N5259BUR-1/TR from Microsemi is a 39 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in low-power analog circuits, reference supplies, and overvoltage protection. It delivers 3.2 mA test current, 80 Ω dynamic impedance at IZT, and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the 1N5259BUR-1/TR datasheet, 1N5259BUR-1/TR pinout, 1N5259BUR-1/TR application, or 1N5259BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJA = 250 °C/W), low leakage (<0.1 µA @ 29 V), radiation-hardened construction, and RoHS-compliant commercial-grade availability with tape-and-reel packaging.
Technical Context
This device functions as a two-terminal reverse-biased voltage reference, operating in the Zener breakdown region with a nominal 39 V regulation at 3.2 mA. Its metallurgically bonded glass construction ensures hermetic sealing, minimal capacitance (~1.5 pF), and inherent radiation hardness per MicroNote 050.
It exhibits a positive temperature coefficient of +0.094 %/°C and maintains stable regulation across wide current (0.25–3.2 mA) and temperature (–65 °C to +175 °C) ranges, with forward voltage ≤1.1 V at 200 mA - enabling bidirectional use in clamping and biasing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 39 V ±5% at 3.2 mA - sets precise reference level for feedback loops or threshold detection |
| Power Dissipation PD | 0.5 W - limits continuous regulation current to ~12.8 mA at 39 V without heatsinking |
| Dynamic Impedance ZZT | 80 Ω at IZT = 3.2 mA - determines output voltage variation under load transients |
| Reverse Leakage IR | <0.1 µA at 29 V - ensures negligible current draw in standby or high-impedance bias networks |
| Junction Temperature Range | –65 °C to +175 °C - supports operation in aerospace, downhole, and industrial environments |
| Thermal Resistance RθJA | 250 °C/W on FR4 (1 oz Cu) - defines derating slope: full power only below 50 °C ambient |
| Temp. Coefficient αVZ | +0.094 %/°C - predicts +36.7 mV/°C drift, requiring compensation in high-stability references |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry and cathode band marking. No polarity-specific PCB footprint required - orientation determined solely by cathode band placement during assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Connected to higher potential node; regulates voltage when reverse-biased relative to anode |
| Anode (unbanded end) | Zener cathode connection point | Connected to lower potential node; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing, eliminating moisture ingress and long-term parameter drift in harsh environments |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-qualified and nuclear instrumentation designs |
| Low capacitance (~1.5 pF) | Minimizes signal coupling and phase shift in RF biasing and high-frequency reference applications |
| ESD insensitivity (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and board-level integration |
| RoHS-compliant matte-tin plating | Supports lead-free reflow soldering (260 °C, 10 s) while maintaining solderability and intermetallic reliability |
Applications
| Industrial Sensor Signal Conditioning | Avionics Power Supply Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for strain gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Zener reference providing fixed 39 V bias to bridge circuit, rejecting supply ripple and temperature drift. Use Value: Enables sub-0.1% full-scale accuracy over –40 °C to +85 °C using passive compensation of its +0.094 %/°C TC. | Use Scenario: Generating a stable reference for DC-DC converter feedback in flight control electronics. IC Role / Device Role / Timing Role: Primary voltage reference in isolated flyback feedback loop, operating at 3.2 mA under 28 V input. Use Value: Delivers <0.1 µA leakage and radiation-hardened stability essential for fail-safe power regulation in certified avionics. |
| Downhole Oilfield Instrumentation | Medical Imaging Bias Supply |
Use Scenario: Regulating gate voltage for high-side MOSFETs in mud-pulse telemetry drivers exposed to 150 °C wellbore temperatures. IC Role / Device Role / Timing Role: High-temperature Zener clamp protecting driver IC inputs against transient overvoltage. Use Value: Maintains regulation integrity up to +175 °C junction temperature with no derating penalty beyond ambient limits. | Use Scenario: Providing bias voltage to photomultiplier tube (PMT) dynode chains in PET scanner detector modules. IC Role / Device Role / Timing Role: Low-noise, low-capacitance voltage reference establishing cascaded dynode potentials. Use Value: 1.5 pF capacitance prevents signal coupling between dynodes; <0.1 µA leakage avoids dark-current injection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5259B-1TR | Same 39 V, ±5%, DO-35 axial package; RθJA = 500 °C/W; no radiation hardening | Limited to ambient-temperature PCB layouts; unsuitable for high-reliability or radiation-exposed systems | Select when cost-sensitive, non-hermetic, through-hole assembly is preferred and thermal budget allows higher RθJA |
| BZX55-C39-TAP | 39 V, ±5%, DO-35; 500 mW; RθJA = 500 °C/W; no MIL-PRF-19500 screening or radiation data | Commercial-only qualification; lacks up-screening options and documented radiation performance | Choose for general-purpose consumer or industrial applications where extended temperature range and radiation immunity are not required |
Compared with 1N5259B-1TR and BZX55-C39-TAP, the 1N5259BUR-1/TR provides superior thermal performance (RθJA = 250 °C/W), hermetic reliability, and verified radiation hardness - making it the only option qualified for aerospace, downhole, and safety-critical embedded systems.
Availability
1N5259BUR-1/TR is available at Aetrix Electronics and suitable for industrial sensor conditioning, avionics reference design, and downhole instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5259BUR-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, radiation-hardened, and high-voltage analog components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was developed to deliver JEDEC-standard Zener performance in a hermetically sealed, surface-mount MELF package - targeting applications demanding long-term stability, extreme temperature operation, and mission-critical reliability.
FAQ
What is the Zener voltage tolerance and test current for the 1N5259BUR-1/TR?
The 1N5259BUR-1/TR has a nominal Zener voltage of 39 V with a ±5% tolerance, measured at a test current (IZT) of 3.2 mA. This tolerance corresponds to the "B" suffix in the part nomenclature and is guaranteed across the full operating temperature range of –65 °C to +175 °C.
Does the 1N5259BUR-1/TR support lead-free reflow soldering?
Yes, the 1N5259BUR-1/TR features RoHS-compliant annealed matte-tin plating and is rated for solder temperature up to 260 °C for 10 seconds, fully compliant with IPC/JEDEC J-STD-020 moisture sensitivity and lead-free reflow profiles.
Is the 1N5259BUR-1/TR radiation hardened, and is documentation available?
Yes, the 1N5259BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050. This characterization applies directly to the 1N52xxBUR-1 series due to its metallurgically bonded glass construction and is confirmed in Microsemi's technical literature - no additional screening is required to achieve this performance.
What is the maximum reverse leakage current specification for the 1N5259BUR-1/TR?
The 1N5259BUR-1/TR specifies a maximum reverse leakage current (IR) of 0.1 µA at a reverse voltage (VR) of 29 V, measured at 25 °C. This ultra-low leakage supports high-impedance bias networks and precision reference applications where current error must be minimized.
Can the 1N5259BUR-1/TR be used in place of axial-leaded 1N5259B-1 parts?
No - the 1N5259BUR-1/TR uses a DO-213AA (SOD-80) MELF surface-mount package, while the 1N5259B-1 uses a DO-35 axial package. They share identical electrical specifications but require different PCB footprints, assembly processes, and thermal management strategies; direct substitution is not mechanically possible without layout revision.
1N5259BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 30 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5259BUR-1/TR FAQ
1.How can I place an order for 1N5259BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5259BUR-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 1N5259BUR-1/TR reliable?
The price and inventory of 1N5259BUR-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 1N5259BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5259BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5259BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5259BUR-1/TR?
1N5259BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5259BUR-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 1N5259BUR-1/TR?
For technical support, including 1N5259BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5259BUR-1/TR requirements.
6.How does Aetrix verify that 1N5259BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5259BUR-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 1N5259BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5259BUR-1/TR?
All 1N5259BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5259BUR-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 1N5259BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5259BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5259BUR-1/TR Tags
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MM5Z5V1ST1G
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