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Microchip Technology 1N5259BUR-1
- Part No.:
- 1N5259BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5259BUR-1.pdf
- Description:
- DIODE ZENER 39V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,057
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Product details
Overview
1N5259BUR-1 from Microsemi is a 39 V, 500 mW surface-mount Zener diode in DO-213AA (SOD80) MELF package with ±5% tolerance, 3.2 mA test current, and 80 Ω dynamic impedance at IZT; used for precision voltage regulation in power supply feedback, reference, and overvoltage protection circuits.
For engineers reviewing the 1N5259BUR-1 datasheet, 1N5259BUR-1 pinout, 1N5259BUR-1 application, or 1N5259BUR-1 equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance, hermetic glass packaging for reliability, temperature coefficient (+0.094 %/°C), and MIL-PRF-19500 upscreening capability.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. It features metallurgical bonding for thermal robustness and exhibits minimal capacitance (<1 pF typical at 39 V), supporting high-frequency stability in analog references.
The device is rated for junction temperatures from –65 °C to +175 °C, with thermal resistance junction-to-ambient of 250 °C/W on FR4 board. Its forward voltage is ≤1.1 V at 200 mA, and reverse leakage is ≤0.1 µA at 29 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal at 3.2 mA test current - defines precise regulation point for feedback loops |
| Power Dissipation (PD) | 0.5 W - supports compact PCB layout without forced cooling in low-power supplies |
| Zener Impedance (ZZT) | 80 Ω at IZT - ensures tight voltage regulation under dynamic load changes |
| Temp. Coefficient (αVZ) | +0.094 %/°C - enables predictable drift compensation in wide-temperature industrial designs |
| Reverse Leakage (IR) | ≤0.1 µA at 29 V - minimizes standby current loss in battery-backed reference circuits |
| Package | DO-213AA (SOD80) MELF - hermetically sealed glass body for moisture resistance and radiation hardness |
| Forward Voltage (VF) | ≤1.1 V at 200 mA - allows safe forward conduction during transient clamping or polarity checks |
Pinout & Package
DO-213AA (SOD80) MELF package: hermetically sealed glass cylindrical body with tin-lead or RoHS-compliant matte-tin end-cap terminations; cathode indicated by single band; no leads - end caps serve as anode and cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential side during reverse-bias operation; defines regulation polarity |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to circuit ground or lower-potential node; completes Zener bias path |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded construction | Enables reliable thermal transfer and long-term stability under thermal cycling |
| Hermetic glass MELF package | Provides immunity to humidity, contaminants, and outgassing in harsh environments |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-qualified and nuclear instrumentation |
| MIL-PRF-19500 upscreening option | Supports military/aerospace applications requiring extended reliability screening and traceability |
| Low capacitance (<1 pF typical) | Minimizes signal coupling and phase shift in high-speed reference and timing circuits |
Applications
| Power Supply Feedback Regulation | Industrial Sensor Reference |
|---|---|
Use Scenario: Stabilizing output voltage in isolated DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise error amplifier threshold. Use Value: 39 V rating matches common auxiliary winding voltages; ±5% tolerance and 80 Ω ZZT ensure <±1% output regulation accuracy. | Use Scenario: Providing stable excitation voltage for RTD or strain gauge bridge circuits in factory automation systems. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ratiometric measurement front-ends. Use Value: +0.094 %/°C tempco enables predictable calibration over –40 °C to +85 °C operating range; hermetic package prevents drift from humidity ingress. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Clamping surge transients on 24 V industrial control I/O lines to protect downstream logic. IC Role / Device Role / Timing Role: Fast-acting shunt protector triggered above 39 V threshold. Use Value: 0.5 W power rating absorbs short-duration surges; low leakage (<0.1 µA) avoids loading sensitive input stages during normal operation. | Use Scenario: Setting trip point for comparator-based battery undervoltage lockout in portable medical devices. IC Role / Device Role / Timing Role: Precision threshold reference for window or level-detection comparators. Use Value: Tight 39 V specification and low dynamic impedance ensure repeatable switching at defined battery voltage; DO-213AA footprint supports automated placement in high-reliability assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5259B-1 | Same electrical specs but in axial DO-35 (DO-204AH) package; no MELF geometry or hermetic seal | Lacks radiation hardness and moisture resistance; unsuitable for high-reliability or space-constrained SMT designs | Select only when through-hole assembly or legacy footprint compatibility is required |
| BZX55-C39 | 39 V, ±5%, 500 mW in DO-35; higher ZZT (100 Ω), no MIL-PRF-19500 screening option, non-hermetic epoxy package | Lower reliability in humid or radiation-prone environments; not qualified for aerospace use | Choose for cost-sensitive commercial applications where hermeticity and upscreening are unnecessary |
Compared with 1N5259B-1 and BZX55-C39, the 1N5259BUR-1 delivers superior thermal performance, hermetic reliability, and radiation tolerance - critical for industrial, aerospace, and medical systems where long-term parametric stability is mandatory.
Availability
1N5259BUR-1 is available at Aetrix Electronics and suitable for industrial power supplies, sensor reference circuits, overvoltage protection networks, and aerospace-grade voltage regulation requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N5259BUR-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, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener performance in a rugged, surface-mount MELF package - targeting applications demanding hermetic sealing, MIL-qualified reliability, and stable regulation under extreme environmental stress.
FAQ
What is the Zener voltage and tolerance of the 1N5259BUR-1?
The 1N5259BUR-1 has a nominal Zener voltage of 39 V with a tolerance of ±5%, measured at a test current of 3.2 mA. This value is specified in the Electrical Characteristics table on page 3 of the T4-LDS-0232-1 datasheet and applies across the full operating temperature range when used within derated power limits.
What package type does the 1N5259BUR-1 use, and is it RoHS compliant?
The 1N5259BUR-1 uses the DO-213AA (SOD80) MELF glass package with metallurgically bonded end caps. RoHS-compliant versions are available for commercial-grade units only, marked with the "e3" suffix; the base part number 1N5259BUR-1 may be either RoHS or non-RoHS depending on manufacturing lot and ordering code.
Does the 1N5259BUR-1 support MIL-PRF-19500 upscreening?
Yes - the 1N5259BUR-1 is eligible for upscreening per MIL-PRF-19500, with reliability levels designated by prefix codes (e.g., MQ, MX, MV, MSP). The "UR" in the part number indicates the metallurgically bonded surface-mount configuration qualified for this screening; specific upscreened variants require custom ordering with appropriate reliability-level prefixes.
What is the maximum reverse leakage current for the 1N5259BUR-1, and at what voltage is it specified?
The maximum reverse leakage current for the 1N5259BUR-1 is 0.1 µA, specified at a reverse voltage (VR) of 29 V. This parameter is guaranteed over the full operating temperature range and reflects the device's low-leakage performance critical for precision reference and low-power standby applications.
How does the temperature coefficient of the 1N5259BUR-1 affect its regulation stability?
The 1N5259BUR-1 has a positive temperature coefficient of +0.094 %/°C, meaning its Zener voltage increases predictably with rising temperature. This allows designers to compensate for thermal drift in high-precision circuits - especially important in industrial sensors and aerospace systems where ambient temperature varies widely and long-term stability is essential.
1N5259BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N5259BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5259BUR-1 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 reliable?
The price and inventory of 1N5259BUR-1 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 is usually 5 days.
3.What payment methods are accepted for 1N5259BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5259BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5259BUR-1?
1N5259BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5259BUR-1 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?
For technical support, including 1N5259BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5259BUR-1 requirements.
6.How does Aetrix verify that 1N5259BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5259BUR-1 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 meets industry standards.
7.What is the process for return or replacement of 1N5259BUR-1?
All 1N5259BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5259BUR-1, 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 part is unused and in its original packaging.
Return procedure for 1N5259BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5259BUR-1 Tags
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BZT52C5V6T-7
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MM5Z5V1ST1G
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