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Microchip Technology 1N5261BUR-1/TR
- Part No.:
- 1N5261BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5261BUR-1/TR.pdf
- Description:
- DIODE ZENER 47V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,387
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Product details
Overview
1N5261BUR-1/TR from Microsemi is a surface-mount 47 V, 5% tolerance Zener diode in a DO-213AA (SOD-80/MELF) glass package, rated for 500 mW steady-state power dissipation, with dynamic impedance of 105 Ω at 2.7 mA test current and temperature coefficient of +0.095 %/°C. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5261BUR-1/TR datasheet, 1N5261BUR-1/TR pinout, 1N5261BUR-1/TR application, or 1N5261BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (100 °C/W junction-to-end-cap), low leakage (<0.1 µA at 34 V), hermetic glass sealing, and RoHS-compliant commercial-grade availability with TR tape-and-reel packaging.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable 47 V regulation across 2.7 mA to 105 mA operating current (IZK to IZM). Its metallurgically bonded glass construction ensures long-term stability and radiation hardness per MicroNote 050, with minimal capacitance (~1.5 pF typical) and ESD insensitivity (MIL-STD-750 Method 1020).
The DO-213AA package enables high thermal performance on FR4 boards (RθJEC = 100 °C/W), supporting operation from –65 °C to +175 °C junction temperature. Voltage regulation is specified at 25 °C with derating above 50 °C ambient or 125 °C end-cap temperature per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V ±5% at 2.7 mA - defines precise regulation point for feedback or clamping |
| Power Dissipation PD | 0.5 W - limits continuous thermal load on PCB without forced cooling |
| Zener Impedance ZZT | 105 Ω at IZT = 2.7 mA - determines output voltage variation under load changes |
| Reverse Leakage IR | <0.1 µA at VR = 34 V - ensures negligible current draw in standby regulation |
| Temp. Coefficient αVZ | +0.095 %/°C - quantifies voltage drift over industrial temperature range |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in harsh environments including aerospace and industrial control |
| Forward Voltage VF | 1.1 V max at 200 mA - defines conduction threshold when used bidirectionally or in series |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with two end-cap terminals; cathode identified by single band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lower-potential rail in shunt regulator configuration |
| Cathode (banded end) | Zener regulation node | Connected to input supply or protected node; maintains 47 V relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables stable long-term Zener voltage with <0.1 µA leakage and radiation hardness per MicroNote 050 |
| Hermetic glass DO-213AA package | Provides moisture immunity and thermal reliability up to +175 °C junction temperature |
| Low dynamic impedance (105 Ω) | Minimizes output voltage deviation under varying load currents in precision references |
| RoHS-compliant tin plating | Supports lead-free reflow soldering per MIL-STD-750 Method 2026 without intermetallic degradation |
| Minimal capacitance (~1.5 pF) | Preserves high-frequency signal integrity in RF bias or fast transient clamp applications |
Applications
| Industrial Power Supply Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 47 V reference for isolated DC-DC converter feedback networks in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing regulation setpoint for optocoupler-coupled error amplifier. Use Value: Maintains ±1% output accuracy over –40 °C to +85 °C ambient due to low tempco and hermetic stability. | Use Scenario: Biasing Hall-effect current sensors in 48 V mild-hybrid vehicle battery management systems. IC Role / Device Role / Timing Role: Zener clamp protecting sensor IC inputs from load-dump transients up to 60 V. Use Value: Withstands 100 ms pulses at 60 V while limiting clamped voltage to ≤47.5 V (5% tolerance), preventing sensor latch-up. |
| Medical Instrumentation Calibration | Avionics Voltage Monitoring |
Use Scenario: Serving as traceable voltage standard in portable ECG amplifier calibration circuitry. IC Role / Device Role / Timing Role: Precision shunt reference generating known offset for ADC input scaling. Use Value: Delivers <10 ppm/°C effective drift over 0–50 °C via matched tempco compensation, meeting IEC 60601-1 stability requirements. | Use Scenario: Monitoring 28 V aircraft bus voltage with overvoltage alarm threshold set at 47 V. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling discrete overvoltage detection without microcontroller. Use Value: Radiation-hardened construction ensures reliable operation in high-altitude flight without parameter shift after 10 krad(Si) exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5261B-1TR | Same 47 V, 5% spec but in axial DO-35 package; RθJA = 500 °C/W vs. 250 °C/W for DO-213AA | Larger board footprint; unsuitable for high-density SMT layouts or high-reliability hermetic requirements | Select when legacy through-hole assembly or manual prototyping is required |
| BZX55-C47-TAP | 47 V, 5% Zener in DO-35; higher max leakage (1.0 µA @ 34 V); no radiation hardness documentation | Lower cost but not qualified to MIL-PRF-19500; limited to commercial-grade instrumentation | Select for cost-sensitive consumer electronics where radiation tolerance and ultra-low leakage are non-critical |
Compared with 1N5261B-1TR and BZX55-C47-TAP, the 1N5261BUR-1/TR offers superior thermal performance in SMT layouts, guaranteed hermeticity, and documented radiation hardness-making it the preferred choice for aerospace, medical, and industrial systems requiring long-term parametric stability.
Availability
1N5261BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor protection, and medical calibration equipment requiring stable component supply with full traceability and extended lifecycle support.
Supply support for 1N5261BUR-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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5261BUR-1/TR belongs to Microsemi's legacy 1N52xxBUR-1 Zener family, designed specifically for surface-mount voltage regulation in mission-critical systems where hermetic sealing, temperature stability, and radiation tolerance are mandatory.
FAQ
What is the Zener voltage tolerance and test current for the 1N5261BUR-1/TR?
The 1N5261BUR-1/TR has a nominal Zener voltage of 47 V with a ±5% tolerance, verified at a test current (IZT) of 2.7 mA. This tolerance is indicated by the "B" suffix in the part number per Microsemi's nomenclature, and the device is characterized across its full operating temperature range from –65 °C to +175 °C.
Does the 1N5261BUR-1/TR support lead-free reflow soldering?
Yes, the 1N5261BUR-1/TR features RoHS-compliant annealed matte-tin plating on its end caps and is qualified for lead-free reflow soldering at 260 °C for 10 seconds per MIL-STD-750 Method 2026. Its DO-213AA glass package remains structurally intact and electrically stable under these conditions.
What is the maximum reverse leakage current specification for the 1N5261BUR-1/TR?
The 1N5261BUR-1/TR specifies a maximum reverse leakage current (IR) of 0.1 µA at a reverse voltage (VR) of 34 V, measured at 25 °C. This ultra-low leakage supports high-impedance reference designs and minimizes quiescent power loss in battery-operated systems.
Is the 1N5261BUR-1/TR suitable for high-reliability aerospace applications?
Yes, the 1N5261BUR-1/TR is metallurgically bonded and hermetically sealed in glass, with documented radiation hardness per Microsemi MicroNote 050. While the commercial "UR" version is not screened to MIL-PRF-19500, its base construction and characterization support use in non-military aerospace subsystems where intrinsic reliability is prioritized.
How does the thermal resistance of the 1N5261BUR-1/TR compare between junction-to-ambient and junction-to-end-cap?
The 1N5261BUR-1/TR has a junction-to-end-cap thermal resistance (RθJEC) of 100 °C/W and a junction-to-ambient resistance (RθJA) of 250 °C/W when mounted on FR4 with 1 oz copper and the recommended footprint. This 2.5× difference confirms that heatsinking via the end caps delivers significantly better thermal performance than relying on PCB convection alone.
1N5261BUR-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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 105 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 36 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
1N5261BUR-1/TR FAQ
1.How can I place an order for 1N5261BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5261BUR-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 1N5261BUR-1/TR reliable?
The price and inventory of 1N5261BUR-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 1N5261BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5261BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5261BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5261BUR-1/TR?
1N5261BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5261BUR-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 1N5261BUR-1/TR?
For technical support, including 1N5261BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5261BUR-1/TR requirements.
6.How does Aetrix verify that 1N5261BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5261BUR-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 1N5261BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5261BUR-1/TR?
All 1N5261BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5261BUR-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 1N5261BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5261BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5261BUR-1/TR Tags
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