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Microchip Technology 1N5244BUR-1
- Part No.:
- 1N5244BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5244BUR-1.pdf
- Description:
- DIODE ZENER 14V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
1N5244BUR-1 from Microsemi is a 14 V, 5% tolerance, 500 mW surface-mount Zener diode in a DO-213AA (SOD-80) MELF glass package, designed for precision voltage regulation in low-power analog circuits, power supply feedback paths, and reference voltage generation across industrial temperature ranges.
For engineers reviewing the 1N5244BUR-1 datasheet, 1N5244BUR-1 pinout, 1N5244BUR-1 application, or 1N5244BUR-1 equivalent, key selection criteria include its 9.5 Ω dynamic impedance at 20 mA, ±0.082 %/°C temperature coefficient, 0.1 µA max reverse leakage at 9.5 V, and hermetically sealed metallurgically bonded construction for stable long-term performance.
Technical Context
This Zener operates in reverse breakdown with cathode-biased polarity, delivering regulated voltage over 0.25–20 mA current range. Its metallurgically bonded glass structure ensures low thermal resistance (RθJEC = 100 °C/W) and inherent radiation hardness per MicroNote 050.
The device exhibits minimal junction capacitance (typ. <1.5 pF at 0 V), enabling use in high-frequency biasing and noise-sensitive references. It is RoHS-compliant (e3 suffix), rated for -65 to +175 °C junction temperature, and qualified to MIL-PRF-19500 screening levels upon request.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 14 V ±5% at IZT = 20 mA - defines nominal regulation point with tight production control |
| Dynamic Impedance ZZT | 9.0 Ω at IZT = 20 mA - ensures low output impedance for stable regulation under load variation |
| Reverse Leakage IR | 0.1 µA max at VR = 9.5 V - enables ultra-low quiescent current in battery-powered references |
| Power Dissipation PD | 0.5 W - supports continuous operation up to 50 °C ambient on FR4 board with recommended footprint |
| Temp. Coefficient αVZ | +0.082 %/°C - provides predictable, positive drift for compensation in temperature-stable designs |
| Junction Temp. Range | -65 to +175 °C - allows deployment in extended industrial, aerospace, and downhole environments |
Pinout & Package
DO-213AA (SOD-80 / MLL34) metallurgically bonded glass MELF package with tin-lead or RoHS-compliant matte-tin end-cap plating. Cathode indicated by single band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher potential; delivers stable 14 V when reverse-biased above breakdown |
| Anode (unbanded end) | Reference return path | Connected to circuit ground or lower-potential rail; completes Zener conduction loop |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in humid or harsh environments |
| Metallurgical bond interface | Reduces thermal resistance (RθJEC = 100 °C/W) for improved power handling and reliability |
| Low capacitance (<1.5 pF) | Minimizes signal coupling and phase shift in RF bias networks and high-speed references |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 for TID tolerance in space and nuclear applications |
| MIL-PRF-19500 up-screening option | Enables qualification to military-grade reliability standards with traceable lot documentation |
Applications
| Power Supply Feedback Reference | Industrial Sensor Excitation |
|---|---|
Use Scenario: Stabilizing output voltage of isolated DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Precision 14 V shunt reference providing error-signal threshold for TL431 or similar controller. Use Value: Tight 5% tolerance and +0.082 %/°C TC enable ±1.5% total output regulation over -40 to +85 °C. | Use Scenario: Supplying excitation voltage to resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for Wheatstone bridge biasing. Use Value: 0.1 µA leakage and <1.5 pF capacitance prevent loading errors and high-frequency interference in mV-level bridge outputs. |
| Programmable Current Source Bias | Overvoltage Clamp Protection |
Use Scenario: Setting reference current for op-amp-based Howland current sources in medical instrumentation. IC Role / Device Role / Timing Role: Stable 14 V node defining IREF = VZ/RSET in precision current generation. Use Value: 9.0 Ω ZZT ensures current accuracy remains within ±0.5% despite ±10% RSET tolerance. | Use Scenario: Clamping transient surges on 12 V automotive microcontroller I/O lines. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting voltage to 14 V before downstream damage occurs. Use Value: Metallurgically bonded construction withstands repetitive 0.5 W surge pulses without parameter shift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V, 1 W, DO-41 package; 22 Ω ZZT; -0.055 %/°C TC | Higher power but larger footprint and looser regulation stability over temperature | Select when higher dissipation (>500 mW) is required and board space permits axial leaded mounting |
| BZX55C14 | 14 V, 500 mW, DO-35 package; 20 Ω ZZT; +0.08 %/°C TC; non-hermetic epoxy | Same voltage/tolerance but higher dynamic impedance and reduced environmental robustness | Choose for cost-sensitive commercial designs where hermetic sealing and radiation tolerance are not required |
Compared with 1N5244BUR-1, the 1N4742A offers greater power headroom but sacrifices surface-mount compatibility and thermal stability, while the BZX55C14 matches voltage and power but lacks hermetic sealing and exhibits higher impedance-making 1N5244BUR-1 optimal for high-reliability, space-constrained, or radiation-aware systems.
Availability
1N5244BUR-1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrument references, and aerospace power conditioning requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N5244BUR-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 developed to deliver JEDEC-standard Zener performance in a hermetically sealed, surface-mount MELF package optimized for mission-critical voltage reference and regulation in extreme environments.
FAQ
What is the Zener voltage tolerance and test current for the 1N5244BUR-1?
The 1N5244BUR-1 has a nominal Zener voltage of 14 V with a ±5% tolerance, measured at a test current IZT of 20 mA. This tolerance corresponds to the "B" suffix in the part nomenclature and ensures regulation within 13.3–14.7 V under standard conditions, supporting reliable design margins in feedback and reference circuits.
Is the 1N5244BUR-1 RoHS compliant?
Yes, the 1N5244BUR-1 is RoHS compliant (e3 suffix), with annealed matte-tin end-cap plating meeting EU Directive 2011/65/EU requirements. This applies to commercial-grade units only; MIL-spec versions may use tin-lead plating unless otherwise specified.
What is the maximum reverse leakage current for the 1N5244BUR-1, and at what voltage is it specified?
The 1N5244BUR-1 specifies a maximum reverse leakage current IR of 0.1 µA at VR = 9.5 V. This ultra-low leakage supports energy-efficient operation in battery-backed references and high-impedance bias networks where standby current must remain below 100 nA.
Can the 1N5244BUR-1 be used in high-temperature environments?
Yes, the 1N5244BUR-1 is rated for junction temperatures from -65 to +175 °C and features a low thermal resistance (RθJEC = 100 °C/W). When mounted per recommended footprint on FR4, it sustains full 0.5 W dissipation up to 50 °C ambient, with linear derating above that-enabling use in engine control units and downhole tools.
Does the 1N5244BUR-1 have radiation hardness certification?
Yes, the 1N5244BUR-1 exhibits inherent radiation hardness validated per Microsemi MicroNote 050, covering total ionizing dose (TID) resilience. While not individually certified per MIL-STD-883, its metallurgically bonded glass structure provides proven performance in low-to-medium radiation environments such as LEO satellites and nuclear instrumentation.
1N5244BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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
1N5244BUR-1 FAQ
1.How can I place an order for 1N5244BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5244BUR-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 1N5244BUR-1 reliable?
The price and inventory of 1N5244BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5244BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5244BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5244BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5244BUR-1?
1N5244BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5244BUR-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 1N5244BUR-1?
For technical support, including 1N5244BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5244BUR-1 requirements.
6.How does Aetrix verify that 1N5244BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5244BUR-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 1N5244BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5244BUR-1?
All 1N5244BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5244BUR-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 1N5244BUR-1 part is unused and in its original packaging.
Return procedure for 1N5244BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5244BUR-1 Tags
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MM5Z5V1ST1G
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